VDAReader Component

Properties   Methods   Events   Config Settings   Errors  

The VDAReader component is optimized for VDA documents, providing a simple way to parse VDA documents.

Syntax

nsoftware.IPWorksEDI.Vdareader

Remarks

The component allows you to parse an incoming EDI document. This component works in two states, loading an entire document at once, or streaming portions of the document. These states are controlled by the BuildDOM property. By default BuildDOM is set to bdEntireDocument which parses the entire document at once, allowing you to use the XPath property to navigate the document.

To save memory for larger documents, you can choose to parse only sections of the document, instead of the entire document. When BuildDOM is set to per interchange (bdInterchange ) or per transaction (bdTransaction), the respective section of the document will be available for use with XPath from within the corresponding Start and End events. Finally, you may choose to set BuildDOM to bdNone, which means no DOM will be built and all data will be available only through events, but also will use very little memory. Below are example steps to parse an entire document:

1. First, use LoadSchema to load a schema file into the component. (Only necessary when preserving document structure).
2. Open an EDI document or stream by setting input via SetInputStream, InputFile or InputData and calling Parse.
3. If BuildDOM is set to bdEntireDocument, the events of the component will fire as the document is parsed, and XPath may be set to access any part of the document.

   If bdInterchange or bdTransaction are specified, Parse is called the entire document will be parsed, with only the specified section being saved in memory at any given time. This means if you wish to set XPath to navigate within the section of the document, you will need to do so within the events of the component to prevent further processing of the document while you access the section. When parsing is completely, only the most recently parsed section will be available for use with XPath

   If bdNone is specified, then all document information must be obtained through the events fired during parsing.

During parsing, the component performs basic validation of the incoming document. If validation fails, a warning is generated (fired as an event).

The XPath navigation is done through the XPath property. For example: EDIReader.XPath = "/IX[1]/FG[1]/TX[2]/N1Loop1[1]/N1[1]"; This example path means the following: Select the first N1 segment within the first iteration of the N1Loop1, within second transaction in the first functional group and interchange.

You can also make use of XPath conditional statements to locate the first element which matches a name=value. For example, you could use the following XPath to locate the path of the first element within any N1Loop1 that has a name=N101 and value=BT: EDIReader.XPath = "IX[1]/FG[1]/TX[1]/N1Loop1[N101='BT']";

Note that the conditional statements will search the children, but not the grand children of the element on which the conditional statement is applied. For instance in the above example the children of N1Loop1 will be searched, but the grandchildren will not.

Additionally if the schema loaded is a ArcESB JSON schema the element Id (from the schema) can be used in the conditional statement. For instance instead of N101 the following is also acceptable: EDIReader.XPath = "IX[1]/FG[1]/TX[1]/N1Loop1[98='BT']";

To display the structure of the parsed document use DisplaySchemaInfo. This is helpful when deciding how to navigate the document.

Property List

The following is the full list of the properties of the component with short descriptions. Click on the links for further details.

Method List

The following is the full list of the methods of the component with short descriptions. Click on the links for further details.

Event List

The following is the full list of the events fired by the component with short descriptions. Click on the links for further details.

Config Settings

The following is a list of config settings for the component with short descriptions. Click on the links for further details.

BuildDOM Property (VDAReader Component)

When True, an internal object model of the EDI document is created.

Syntax

• C#
• VB.NET

public VdareaderBuildDOMs BuildDOM { get; set; }

enum VdareaderBuildDOMs {
  bdEntireDocument,
  bdInterchange,
  bdTransaction,
  bdNone
}

Public Property BuildDOM As VdareaderBuildDOMs

Enum VdareaderBuildDOMs
  bdEntireDocument
  bdInterchange
  bdTransaction
  bdNone
End Enum

Default Value

0

Remarks

Set BuildDOM to bdEntireDocument (0) when you need to browse the current document through XPath.

Use bdInterchange (1) when parsing large documents to tell the component to only hold an internal object model of the current Interchange being parsed. When this value is used, and a new Interchange is encountered during parsing, the old interchange is cleared from memory. If the input contains a single Interchange, this is equivalent to using bdEntireDocument.

Use bdTransaction (2) when parsing large documents to tell the component to only hold an internal object model of the current transaction being parsed. When this value is used, and a new transaction is encountered during parsing, the old transaction is cleared from memory.

A value of bdNone (3) will tell the component to not save any internal state of the document being parsed, and thus XPath will be unavailable.

EDIStandardVersion Property (VDAReader Component)

The version of the EDI specification.

Syntax

• C#
• VB.NET

public string EDIStandardVersion { get; }

Public ReadOnly Property EDIStandardVersion As String

Default Value

""

Remarks

This property will be populated after parsing begins and the correct version string for is located via the schema, such as 004010 for X12.

This property is read-only and not available at design time.

ExtraData Property (VDAReader Component)

Extra data that has not been parsed by the component.

Syntax

• C#
• VB.NET

public string ExtraData { get; }

Public ReadOnly Property ExtraData As String

Default Value

""

Remarks

This property will only be populated after the Flush method has been called and data exists in the internal parser which has not been processed.

This property is read-only and not available at design time.

InputData Property (VDAReader Component)

The data to parse.

Syntax

• C#
• VB.NET

public string InputData { get; set; }

Public Property InputData As String

Default Value

""

Remarks

This property specifies the data to be parsed.

Input Properties

The component will determine the source of the input based on which properties are set.

The order in which the input properties are checked is as follows:

• SetInputStream
• InputFile
• InputData

InputFile Property (VDAReader Component)

The file to parse.

Syntax

• C#
• VB.NET

public string InputFile { get; set; }

Public Property InputFile As String

Default Value

""

Remarks

This property specifies the file to be processed. Set this property to the full or relative path to the file which will be processed.

Input Properties

The component will determine the source of the input based on which properties are set.

The order in which the input properties are checked is as follows:

• SetInputStream
• InputFile
• InputData

This property is not available at design time.

Offset Property (VDAReader Component)

Current offset of the document being parsed.

Syntax

• C#
• VB.NET

public long Offset { get; }

Public ReadOnly Property Offset As Long

Default Value

0

Remarks

This property is useful for determining the location of possible EDI errors in the document.

This property is read-only and not available at design time.

SchemaFormat Property (VDAReader Component)

The format of the schema file.

Syntax

• C#
• VB.NET

public VdareaderSchemaFormats SchemaFormat { get; set; }

enum VdareaderSchemaFormats {
  schemaAutomatic,
  schemaBinary,
  schemaBizTalk,
  schemaSEF,
  schemaBOTS,
  schemaAltova,
  schemaJSON
}

Public Property SchemaFormat As VdareaderSchemaFormats

Enum VdareaderSchemaFormats
  schemaAutomatic
  schemaBinary
  schemaBizTalk
  schemaSEF
  schemaBOTS
  schemaAltova
  schemaJSON
End Enum

Default Value

0

Remarks

Set SchemaFormat before calling the LoadSchema method to specify the loading schema format.

The following schema formats are supported:

XChildren Property (VDAReader Component)

Number of child elements of the current segment.

Syntax

• C#
• VB.NET

public int XChildren { get; }

Public ReadOnly Property XChildren As Integer

Default Value

0

Remarks

This property describes the number of children of the current segment in the parsed document.

This collection is indexed from 0 to Count - 1.

This property is read-only and not available at design time.

XElements Property (VDAReader Component)

Collection of elements in the current EDI segment.

Syntax

• C#
• VB.NET

public EDIElementList XElements { get; }

Public ReadOnly Property XElements As EDIElementList

Remarks

When BuildDOM is set to bdEntireDocument or bdTransaction, this property will be populated when XPath is set to a valid segment within the document.

When BuildDOM is set to bdNone, this property will be populated for each event with the parsed out elements for that particular segment.

This collection is indexed from 0 to count -1.

Example (Loop through all Elements of an Segment)

For i = 0 to EDIReader.XElements.Count - 1 DoSomethingWith(EDIReader.XElements(i).Name, EDIReader.XElements(i).Value) Next i

This property is read-only and not available at design time.

XPath Property (VDAReader Component)

Provides a way to point to a specific segment in the document.

Syntax

• C#
• VB.NET

public string XPath { get; set; }

Public Property XPath As String

Default Value

""

Remarks

The path is a series of one or more segment accessors separated by '/'. The path can be absolute (starting with '/') or relative to the current XPath location.

The following are possible values for an element accessor:

BuildDOM must be set to bdEntireDocument or bdTransaction prior to parsing the document for the XPath functionality to be available.

Example (Setting XPath)

XSegment Property (VDAReader Component)

The name of the current segment.

Syntax

• C#
• VB.NET

public string XSegment { get; }

Public ReadOnly Property XSegment As String

Default Value

""

Remarks

The name of the current segment according to the schema. The current segment is specified via the XPath property.

This property is read-only and not available at design time.

XSegmentNumber Property (VDAReader Component)

The number of the current segment.

Syntax

• C#
• VB.NET

public int XSegmentNumber { get; }

Public ReadOnly Property XSegmentNumber As Integer

Default Value

0

Remarks

The number of the current segment according to the schema. The current segment is specified via the XPath property.

This property is read-only and not available at design time.

XSegmentType Property (VDAReader Component)

Indicates the current segment type.

Syntax

• C#
• VB.NET

public VdareaderXSegmentTypes XSegmentType { get; }

enum VdareaderXSegmentTypes {
  stNone,
  stInterchange,
  stFunctionalGroup,
  stTransaction,
  stInterchangeHeader,
  stFunctionalGroupHeader,
  stTransactionHeader,
  stTransactionSegment,
  stTransactionLoop,
  stTransactionFooter,
  stFunctionalGroupFooter,
  stInterchangeFooter
}

Public ReadOnly Property XSegmentType As VdareaderXSegmentTypes

Enum VdareaderXSegmentTypes
  stNone
  stInterchange
  stFunctionalGroup
  stTransaction
  stInterchangeHeader
  stFunctionalGroupHeader
  stTransactionHeader
  stTransactionSegment
  stTransactionLoop
  stTransactionFooter
  stFunctionalGroupFooter
  stInterchangeFooter
End Enum

Default Value

0

Remarks

The current segment will be a control segment footer/header or a transaction data segment.

This property is read-only and not available at design time.

XTag Property (VDAReader Component)

The tag of the current segment.

Syntax

• C#
• VB.NET

public string XTag { get; }

Public ReadOnly Property XTag As String

Default Value

""

Remarks

The current segment is specified via the XPath property.

This property is read-only and not available at design time.

XTransactionCode Property (VDAReader Component)

The transaction code of the current segment.

Syntax

• C#
• VB.NET

public string XTransactionCode { get; }

Public ReadOnly Property XTransactionCode As String

Default Value

""

Remarks

The current segment is specified via the XPath property.

This property is read-only and not available at design time.

CompileSchema Method (VDAReader Component)

Compiles an existing XSD schema into an optimized binary representation.

Syntax

• C#
• VB.NET

public void CompileSchema(string xsdSchema, string binSchema);

Async Version
public async Task CompileSchema(string xsdSchema, string binSchema);
public async Task CompileSchema(string xsdSchema, string binSchema, CancellationToken cancellationToken);

Public Sub CompileSchema(ByVal XsdSchema As String, ByVal BinSchema As String)

Async Version
Public Sub CompileSchema(ByVal XsdSchema As String, ByVal BinSchema As String) As Task
Public Sub CompileSchema(ByVal XsdSchema As String, ByVal BinSchema As String, cancellationToken As CancellationToken) As Task

Remarks

This method parses XsdSchema and generates an optimized binary representation that is saved into the path referenced by BinSchema. Binary schemas are smaller and require less resources when loading later using LoadSchema

If the schema file does not exists or cannot be parsed as an EDI schema, the component throws an exception.

Config Method (VDAReader Component)

Sets or retrieves a configuration setting.

Syntax

• C#
• VB.NET

public string Config(string configurationString);

Async Version
public async Task<string> Config(string configurationString);
public async Task<string> Config(string configurationString, CancellationToken cancellationToken);

Public Function Config(ByVal ConfigurationString As String) As String

Async Version
Public Function Config(ByVal ConfigurationString As String) As Task(Of String)
Public Function Config(ByVal ConfigurationString As String, cancellationToken As CancellationToken) As Task(Of String)

Remarks

Config is a generic method available in every component. It is used to set and retrieve configuration settings for the component.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these internal properties is provided through the Config method.

To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).

To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.

DisplaySchemaInfo Method (VDAReader Component)

Returns a string showing the structure of the schema defining the document.

Syntax

• C#
• VB.NET

public string DisplaySchemaInfo();

Async Version
public async Task<string> DisplaySchemaInfo();
public async Task<string> DisplaySchemaInfo(CancellationToken cancellationToken);

Public Function DisplaySchemaInfo() As String

Async Version
Public Function DisplaySchemaInfo() As Task(Of String)
Public Function DisplaySchemaInfo(cancellationToken As CancellationToken) As Task(Of String)

Remarks

After calling LoadSchema this may be called to obtain information about the structure of the schema defining the document. If the desired XPath is not known this helps determine the structure so that the correct XPath can be built.

Note: A valid schema must be loaded via LoadSchema.

For instance: Console.WriteLine(component.DisplaySchemaInfo()); Will output text like:

  ST[0,1]
  BIG[0,1]
  NTE[0,100]
  CUR[0,1]
  REF[0,12]
  YNQ[0,10]
  PER[0,3]
  N1Loop1[0,200]
    N1[0,1]
    N2[0,2]
    N3[0,2]
    N4[0,1]
    REF_2[0,12]
    PER_2[0,3]
    DMG[0,1]
  ITD[0,999999]
  DTM[0,10]
  FOB[0,1]
  PID[0,200]
  MEA[0,40]
  PWK[0,25]
  PKG[0,25]
  L7[0,1]
  BAL[0,999999]
  INC[0,1]
  PAM[0,999999]
  LMLoop1[0,10]
    LM[0,1]
    LQ[0,100]
  N9Loop1[0,1]
    N9[0,1]
    MSG[0,10]
  V1Loop1[0,999999]
    V1[0,1]
    R4[0,999999]
    DTM_2[0,999999]
  FA1Loop1[0,999999]
    FA1[0,1]
    FA2[0,999999]
  IT1Loop1[0,200000]
    IT1[0,1]
    CRC[0,1]
    QTY[0,5]
    CUR_2[0,1]
    IT3[0,5]
    TXI[0,10]
    CTP[0,25]
    PAM_2[0,10]
    MEA_2[0,40]
    PIDLoop1[0,1000]
      PID_2[0,1]
      MEA_3[0,10]
    PWK_2[0,25]
    PKG_2[0,25]
    PO4[0,1]
    ITD_2[0,2]
    REF_3[0,999999]
    YNQ_2[0,10]
    PER_3[0,5]
    SDQ[0,500]
    DTM_3[0,10]
    CAD[0,999999]
    L7_2[0,999999]
    SR[0,1]
    SACLoop1[0,25]
      SAC[0,1]
      TXI_2[0,10]
    SLNLoop1[0,1000]
      SLN[0,1]
      DTM_4[0,1]
      REF_4[0,999999]
      PID_3[0,1000]
      SAC_2[0,25]
      TC2[0,2]
      TXI_3[0,10]
    N1Loop2[0,200]
      N1_2[0,1]
      N2_2[0,2]
      N3_2[0,2]
      N4_2[0,1]
      REF_5[0,12]
      PER_4[0,3]
      DMG_2[0,1]
    LMLoop2[0,10]
      LM_2[0,1]
      LQ_2[0,100]
    V1Loop2[0,999999]
      V1_2[0,1]
      R4_2[0,999999]
      DTM_5[0,999999]
    FA1Loop2[0,999999]
      FA1_2[0,1]
      FA2_2[0,999999]
  TDS[0,1]
  TXI_4[0,10]
  CAD_2[0,1]
  AMT[0,999999]
  SACLoop2[0,25]
    SAC_3[0,1]
    TXI_5[0,10]
  ISSLoop1[0,999999]
    ISS[0,1]
    PID_4[0,1]
  CTT[0,1]
  SE[0,1]

DisplayXMLInfo Method (VDAReader Component)

Returns a string showing the structure of the parsed document as XML.

Syntax

• C#
• VB.NET

public string DisplayXMLInfo();

Async Version
public async Task<string> DisplayXMLInfo();
public async Task<string> DisplayXMLInfo(CancellationToken cancellationToken);

Public Function DisplayXMLInfo() As String

Async Version
Public Function DisplayXMLInfo() As Task(Of String)
Public Function DisplayXMLInfo(cancellationToken As CancellationToken) As Task(Of String)

Remarks

After the EDI document has been parsed this method may be called to obtain information about the document structure. The parsed data is represented as XML when queried. This shows all parsed data and may be useful for testing and debugging purposes. For instance: Console.WriteLine(component.DisplayXMLInfo()); Will output text like:

<IX tag="ISA" ISA01="00" ISA02="          " ISA03="00" ISA04="          " ISA05="ZZ" ISA06="ACME           " ISA07="ZZ" ISA08="WAYNE_TECH     " ISA09="160707" ISA10="1544" ISA11="U" ISA12="00401" ISA13="000000006" ISA14="0" ISA15="T" ISA16=">">
  <FG tag="GS" GS01="IN" GS02="ACME" GS03="WAYNE_TECH" GS04="20160707" GS05="1544" GS06="6" GS07="T" GS08="004010">
    <TX tag="ST" ST01="810" ST02="0001">
      <BIG tag="BIG" BIG01="20150708" BIG02="3003014445" BIG03="" BIG04="0476553272" BIG05="" BIG06="" BIG07="DR"/>
      <CUR tag="CUR" CUR01="SE" CUR02="USD"/>
      <REF tag="REF" REF01="8M" REF02="0056"/>
      <N1Loop1>
        <N1 tag="N1" N101="BY" N102="Company" N103="92" N104="544380"/>
        <N3 tag="N3" N301="Address"/>
        <N4 tag="N4" N401="City" N402="CA" N403="Postal Code"/>
      </N1Loop1>
      <N1Loop1>
        <N1 tag="N1" N101="ST" N102="Name" N103="92" N104="0607047800010"/>
        <N3 tag="N3" N301="Address"/>
        <N4 tag="N4" N401="City" N402="" N403="200131" N404="US"/>
      </N1Loop1>
      <N1Loop1>
        <N1 tag="N1" N101="RE" N102="Name" N103="92" N104="5095956"/>
        <N3 tag="N3" N301="Address"/>
        <N4 tag="N4" N401="City" N402="IL" N403="Postal Code"/>
      </N1Loop1>
      <IT1Loop1>
        <IT1 tag="IT1" IT101="20" IT102="2500" IT103="EA" IT104="36.96" IT105="" IT106="BP" IT107="335S0594"/>
        <REF_3 tag="REF" REF01="KK" REF02="0099778154"/>
        <REF_3 tag="REF" REF01="PO" REF02="0476553272" REF03="20"/>
      </IT1Loop1>
      <TDS tag="TDS" TDS01="9240000"/>
      <CTT tag="CTT" CTT01="1"/>
    </TX>
  </FG>
</IX>

Flush Method (VDAReader Component)

Flushes the parser and checks its end state.

Syntax

• C#
• VB.NET

public void Flush();

Async Version
public async Task Flush();
public async Task Flush(CancellationToken cancellationToken);

Public Sub Flush()

Async Version
Public Sub Flush() As Task
Public Sub Flush(cancellationToken As CancellationToken) As Task

Remarks

When Flush is called, the parser flushes all its buffers, firing events as necessary, and then checks its end state.

Any extra un-parsed data will be populated in the ExtraData property after this method is called.

GenerateAck Method (VDAReader Component)

Generates an EDI acknowledgement.

Syntax

• C#
• VB.NET

public string GenerateAck();

Async Version
public async Task<string> GenerateAck();
public async Task<string> GenerateAck(CancellationToken cancellationToken);

Public Function GenerateAck() As String

Async Version
Public Function GenerateAck() As Task(Of String)
Public Function GenerateAck(cancellationToken As CancellationToken) As Task(Of String)

Remarks

This functionality is not yet implemented and is reserved for future use.

HasXPath Method (VDAReader Component)

Determines whether a specific element exists in the document.

Syntax

• C#
• VB.NET

public bool HasXPath(string XPath);

Async Version
public async Task<bool> HasXPath(string XPath);
public async Task<bool> HasXPath(string XPath, CancellationToken cancellationToken);

Public Function HasXPath(ByVal XPath As String) As Boolean

Async Version
Public Function HasXPath(ByVal XPath As String) As Task(Of Boolean)
Public Function HasXPath(ByVal XPath As String, cancellationToken As CancellationToken) As Task(Of Boolean)

Remarks

This method determines whether a particular XPath exists within the document. This may be used to check if a path exists before setting it via XPath.

This method returns True if the xpath exists, False if not.

See XPath for details on the XPath syntax.

LoadSchema Method (VDAReader Component)

Loads a schema file describing a Transaction Set.

Syntax

• C#
• VB.NET

public void LoadSchema(string fileName);

Async Version
public async Task LoadSchema(string fileName);
public async Task LoadSchema(string fileName, CancellationToken cancellationToken);

Public Sub LoadSchema(ByVal FileName As String)

Async Version
Public Sub LoadSchema(ByVal FileName As String) As Task
Public Sub LoadSchema(ByVal FileName As String, cancellationToken As CancellationToken) As Task

Remarks

This method parses the File and loads it into an internal schema list. The component will attempt to automatically detect the SchemaFormat.

If the schema file does not exist or cannot be parsed as an EDI schema, the component throws an exception.

LoadSchemaStream Method (VDAReader Component)

Loads a schema stream describing a Transaction Set.

Syntax

• C#
• VB.NET

public void LoadSchemaStream(System.IO.Stream schemaStream);

Async Version
public async Task LoadSchemaStream(System.IO.Stream schemaStream);
public async Task LoadSchemaStream(System.IO.Stream schemaStream, CancellationToken cancellationToken);

Public Sub LoadSchemaStream(ByVal SchemaStream As System.IO.Stream)

Async Version
Public Sub LoadSchemaStream(ByVal SchemaStream As System.IO.Stream) As Task
Public Sub LoadSchemaStream(ByVal SchemaStream As System.IO.Stream, cancellationToken As CancellationToken) As Task

Remarks

Parses Stream and loads it into an internal schema list. The SchemaFormat property must be set before calling this method.

The following SchemaFormat values are supported when calling this method:

• schemaBinary
• schemaBizTalk
• schemaSEF

Parse Method (VDAReader Component)

Parse the specified input data.

Syntax

• C#
• VB.NET

public void Parse();

Async Version
public async Task Parse();
public async Task Parse(CancellationToken cancellationToken);

Public Sub Parse()

Async Version
Public Sub Parse() As Task
Public Sub Parse(cancellationToken As CancellationToken) As Task

Remarks

This method parsed the input data specified by SetOutputStream, InputFile or InputData.

During parsing the following events may fire:

• StartInterchange
• StartFunctionalGroup
• StartTransaction
• Segment
• StartLoop
• EndLoop
• EndTransaction
• EndFunctionalGroup
• EndInterchange

After Parse returns the document may be traversed by setting the XPath property. The XPath navigation is done through the XPath property. For example: EDIReader.XPath = "/IX[1]/FG[1]/TX[2]/N1Loop1[1]/N1[1]"; This example path means the following: Select the first N1 segment within the first iteration of the N1Loop1, within second transaction in the first functional group and interchange.

You can also make use of XPath conditional statements to locate the first element which matches a name=value. For example, you could use the following XPath to locate the path of the first element within any N1Loop1 that has a name=N101 and value=BT: EDIReader.XPath = "IX[1]/FG[1]/TX[1]/N1Loop1[N101='BT']";

Note that the conditional statements will search the children, but not the grand children of the element on which the conditional statement is applied. For instance in the above example the children of N1Loop1 will be searched, but the grandchildren will not.

Additionally if the schema loaded is a ArcESB JSON schema the element Id (from the schema) can be used in the conditional statement. For instance instead of N101 the following is also acceptable: EDIReader.XPath = "IX[1]/FG[1]/TX[1]/N1Loop1[98='BT']";

Input Properties

The component will determine the source of the input based on which properties are set.

The order in which the input properties are checked is as follows:

• SetInputStream
• InputFile
• InputData

InputData Notes

When setting data to parse via InputData fragments or complete documents may be specified. To parse data in chunks set InputData and call Parse for each fragment.

When the parser is finally reset via the Reset method, all buffered text is flushed out through the ExtraData property.

Since the component can be used to parse EDI data fragments, the internal buffer will not be cleared until Reset is called. If you plan to use this method to parse multiple complete EDI documents be sure to call Reset between calls.

Reset Method (VDAReader Component)

Resets the parser.

Syntax

• C#
• VB.NET

public void Reset();

Async Version
public async Task Reset();
public async Task Reset(CancellationToken cancellationToken);

Public Sub Reset()

Async Version
Public Sub Reset() As Task
Public Sub Reset(cancellationToken As CancellationToken) As Task

Remarks

When called, the parser flushes all its buffers, firing events as necessary, and then initializes itself to its default state.

Reset must also be used as signal to the parser that the current stream of text has terminated.

SetInputStream Method (VDAReader Component)

Sets the stream from which the component will read the data to parse.

Syntax

• C#
• VB.NET

public void SetInputStream(System.IO.Stream inputStream);

Async Version
public async Task SetInputStream(System.IO.Stream inputStream);
public async Task SetInputStream(System.IO.Stream inputStream, CancellationToken cancellationToken);

Public Sub SetInputStream(ByVal InputStream As System.IO.Stream)

Async Version
Public Sub SetInputStream(ByVal InputStream As System.IO.Stream) As Task
Public Sub SetInputStream(ByVal InputStream As System.IO.Stream, cancellationToken As CancellationToken) As Task

Remarks

This method sets the stream from which the component will read the data to parse.

Input Properties

The component will determine the source of the input based on which properties are set.

The order in which the input properties are checked is as follows:

• SetInputStream
• InputFile
• InputData

TryXPath Method (VDAReader Component)

Navigates to the specified XPath if it exists.

Syntax

• C#
• VB.NET

public bool TryXPath(string xpath);

Async Version
public async Task<bool> TryXPath(string xpath);
public async Task<bool> TryXPath(string xpath, CancellationToken cancellationToken);

Public Function TryXPath(ByVal xpath As String) As Boolean

Async Version
Public Function TryXPath(ByVal xpath As String) As Task(Of Boolean)
Public Function TryXPath(ByVal xpath As String, cancellationToken As CancellationToken) As Task(Of Boolean)

Remarks

This method will attempt to navigate to the specified XPath parameter if it exists within the document.

If the XPath exists the XPath property will be updated and this method returns True.

If the XPath does not exist the XPath property is not updated and this method returns False.

EndFunctionalGroup Event (VDAReader Component)

Fires whenever a control segment is read that marks the end of an interchange.

Syntax

• C#
• VB.NET

public event OnEndFunctionalGroupHandler OnEndFunctionalGroup;

public delegate void OnEndFunctionalGroupHandler(object sender, VdareaderEndFunctionalGroupEventArgs e);

public class VdareaderEndFunctionalGroupEventArgs : EventArgs {
  public string Tag { get; }
  public string ControlNumber { get; }
  public int Count { get; }
  public string FullSegment { get; }
}

Public Event OnEndFunctionalGroup As OnEndFunctionalGroupHandler

Public Delegate Sub OnEndFunctionalGroupHandler(sender As Object, e As VdareaderEndFunctionalGroupEventArgs)

Public Class VdareaderEndFunctionalGroupEventArgs Inherits EventArgs
  Public ReadOnly Property Tag As String
  Public ReadOnly Property ControlNumber As String
  Public ReadOnly Property Count As Integer
  Public ReadOnly Property FullSegment As String
End Class

Remarks

The EndFunctionalGroup event will fire when a control segment marking the end of a functional group is read. The Tag parameter contains the tag of the segment, such as GE. ControlNumber contains the control number associated with the segment, and links this event with the corresponding StartFunctionalGroup event. Count contains the value of the count element included in the closing segment, which identifies the number of transactions in a functional group.

EndInterchange Event (VDAReader Component)

Fires whenever a control segment is read that marks the end of an interchange.

Syntax

• C#
• VB.NET

public event OnEndInterchangeHandler OnEndInterchange;

public delegate void OnEndInterchangeHandler(object sender, VdareaderEndInterchangeEventArgs e);

public class VdareaderEndInterchangeEventArgs : EventArgs {
  public string Tag { get; }
  public string ControlNumber { get; }
  public string FullSegment { get; }
}

Public Event OnEndInterchange As OnEndInterchangeHandler

Public Delegate Sub OnEndInterchangeHandler(sender As Object, e As VdareaderEndInterchangeEventArgs)

Public Class VdareaderEndInterchangeEventArgs Inherits EventArgs
  Public ReadOnly Property Tag As String
  Public ReadOnly Property ControlNumber As String
  Public ReadOnly Property FullSegment As String
End Class

Remarks

The EndInterchange event will fire when a control segment marking the end of an interchange is read. The Tag parameter contains the tag of the segment, such as IEA. ControlNumber contains the control number associated with the segment, and links this event with the corresponding StartInterchange event.

EndLoop Event (VDAReader Component)

Fires when the end of a loop is detected in a transaction set.

Syntax

• C#
• VB.NET

public event OnEndLoopHandler OnEndLoop;

public delegate void OnEndLoopHandler(object sender, VdareaderEndLoopEventArgs e);

public class VdareaderEndLoopEventArgs : EventArgs {
}

Public Event OnEndLoop As OnEndLoopHandler

Public Delegate Sub OnEndLoopHandler(sender As Object, e As VdareaderEndLoopEventArgs)

Public Class VdareaderEndLoopEventArgs Inherits EventArgs
End Class

Remarks

The EndLoop event will fire after the last segment in a loop is read. Each EndLoop event is paired with one StartLoop event.

EndTransaction Event (VDAReader Component)

Fires whenever a control segment is read that marks the end of a transaction.

Syntax

• C#
• VB.NET

public event OnEndTransactionHandler OnEndTransaction;

public delegate void OnEndTransactionHandler(object sender, VdareaderEndTransactionEventArgs e);

public class VdareaderEndTransactionEventArgs : EventArgs {
  public string Tag { get; }
  public string ControlNumber { get; }
  public int Count { get; }
  public string FullSegment { get; }
}

Public Event OnEndTransaction As OnEndTransactionHandler

Public Delegate Sub OnEndTransactionHandler(sender As Object, e As VdareaderEndTransactionEventArgs)

Public Class VdareaderEndTransactionEventArgs Inherits EventArgs
  Public ReadOnly Property Tag As String
  Public ReadOnly Property ControlNumber As String
  Public ReadOnly Property Count As Integer
  Public ReadOnly Property FullSegment As String
End Class

Remarks

The EndTransaction event will fire when a control segment marking the end of a transaction is read. The Tag parameter contains the tag of the segment, such as SE. ControlNumber contains the control number associated with the segment, and links this event with the corresponding StartTransaction event. Count contains the value of the count element included in the closing segment, which identifies the number of segments in a transaction set.

Error Event (VDAReader Component)

Fired when information is available about errors during data delivery.

Syntax

• C#
• VB.NET

public event OnErrorHandler OnError;

public delegate void OnErrorHandler(object sender, VdareaderErrorEventArgs e);

public class VdareaderErrorEventArgs : EventArgs {
  public int ErrorCode { get; }
  public string Description { get; }
}

Public Event OnError As OnErrorHandler

Public Delegate Sub OnErrorHandler(sender As Object, e As VdareaderErrorEventArgs)

Public Class VdareaderErrorEventArgs Inherits EventArgs
  Public ReadOnly Property ErrorCode As Integer
  Public ReadOnly Property Description As String
End Class

Remarks

The Error event is fired in case of exceptional conditions during message processing. Normally the component throws an exception.

The ErrorCode parameter contains an error code, and the Description parameter contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Error Codes section.

ResolveSchema Event (VDAReader Component)

Fires whenever a new transaction set is encountered and no schema is found for it.

Syntax

• C#
• VB.NET

public event OnResolveSchemaHandler OnResolveSchema;

public delegate void OnResolveSchemaHandler(object sender, VdareaderResolveSchemaEventArgs e);

public class VdareaderResolveSchemaEventArgs : EventArgs {
  public string TransactionCode { get; }
  public string StandardVersion { get; }
}

Public Event OnResolveSchema As OnResolveSchemaHandler

Public Delegate Sub OnResolveSchemaHandler(sender As Object, e As VdareaderResolveSchemaEventArgs)

Public Class VdareaderResolveSchemaEventArgs Inherits EventArgs
  Public ReadOnly Property TransactionCode As String
  Public ReadOnly Property StandardVersion As String
End Class

Remarks

The ResolveSchema event will fire when a the component encounters the header segment of a new transaction set, but it finds no schema corresponding to it already loaded.

TransactionCode contains the code of the transaction, such as "810" or "APERAK".

StandardVersion contains the version of the transaction, such as "004010" or "D95A".

When processing this event, the caller can use LoadSchema() to load a new schema into the component that can be used to parse the transaction.

After the event fires, if the component still doesn't have a matching schema, then it will attempt schema-less parsing of the transaction set.

Segment Event (VDAReader Component)

Fires whenever a data segment in a transaction set is read.

Syntax

• C#
• VB.NET

public event OnSegmentHandler OnSegment;

public delegate void OnSegmentHandler(object sender, VdareaderSegmentEventArgs e);

public class VdareaderSegmentEventArgs : EventArgs {
  public string Tag { get; }
  public string Name { get; }
  public string LoopName { get; }
  public string FullSegment { get; }
}

Public Event OnSegment As OnSegmentHandler

Public Delegate Sub OnSegmentHandler(sender As Object, e As VdareaderSegmentEventArgs)

Public Class VdareaderSegmentEventArgs Inherits EventArgs
  Public ReadOnly Property Tag As String
  Public ReadOnly Property Name As String
  Public ReadOnly Property LoopName As String
  Public ReadOnly Property FullSegment As String
End Class

Remarks

The Segment event will fire when a data segment is read. The Tag parameter contains the tag of the segment. Name contains the name of the segment as defined in the associated transaction set schema. LoopName contains the name of the loop or group this segment is present in (such as N1Loop1).

StartFunctionalGroup Event (VDAReader Component)

Fires whenever a control segment is read that marks the start of a functional group.

Syntax

• C#
• VB.NET

public event OnStartFunctionalGroupHandler OnStartFunctionalGroup;

public delegate void OnStartFunctionalGroupHandler(object sender, VdareaderStartFunctionalGroupEventArgs e);

public class VdareaderStartFunctionalGroupEventArgs : EventArgs {
  public string Tag { get; }
  public string ControlNumber { get; }
  public string FullSegment { get; }
}

Public Event OnStartFunctionalGroup As OnStartFunctionalGroupHandler

Public Delegate Sub OnStartFunctionalGroupHandler(sender As Object, e As VdareaderStartFunctionalGroupEventArgs)

Public Class VdareaderStartFunctionalGroupEventArgs Inherits EventArgs
  Public ReadOnly Property Tag As String
  Public ReadOnly Property ControlNumber As String
  Public ReadOnly Property FullSegment As String
End Class

Remarks

The StartFunctionalGroup event will fire when a control segment marking the start of a functional group structure is read. The Tag parameter contains the tag of the segment, such as GS. ControlNumber contains the control number associated with the segment.

StartInterchange Event (VDAReader Component)

Fires whenever a control segment is read that marks the start of an interchange.

Syntax

• C#
• VB.NET

public event OnStartInterchangeHandler OnStartInterchange;

public delegate void OnStartInterchangeHandler(object sender, VdareaderStartInterchangeEventArgs e);

public class VdareaderStartInterchangeEventArgs : EventArgs {
  public string Tag { get; }
  public string ControlNumber { get; }
  public string FullSegment { get; }
}

Public Event OnStartInterchange As OnStartInterchangeHandler

Public Delegate Sub OnStartInterchangeHandler(sender As Object, e As VdareaderStartInterchangeEventArgs)

Public Class VdareaderStartInterchangeEventArgs Inherits EventArgs
  Public ReadOnly Property Tag As String
  Public ReadOnly Property ControlNumber As String
  Public ReadOnly Property FullSegment As String
End Class

Remarks

The StartInterchange event will fire when a control segment marking the start of an interchange structure is read. The Tag parameter contains the tag of the segment, such as ISA. ControlNumber contains the control number associated with the segment.

StartLoop Event (VDAReader Component)

Fires when the starting of a loop is detected in a transaction set.

Syntax

• C#
• VB.NET

public event OnStartLoopHandler OnStartLoop;

public delegate void OnStartLoopHandler(object sender, VdareaderStartLoopEventArgs e);

public class VdareaderStartLoopEventArgs : EventArgs {
  public string Name { get; }
}

Public Event OnStartLoop As OnStartLoopHandler

Public Delegate Sub OnStartLoopHandler(sender As Object, e As VdareaderStartLoopEventArgs)

Public Class VdareaderStartLoopEventArgs Inherits EventArgs
  Public ReadOnly Property Name As String
End Class

Remarks

The StartLoop event will fire when the tag of a loop trigger segment is read. The Name parameter contains the schema-provided name of the loop, such as "N1Loop1".

StartTransaction Event (VDAReader Component)

Fires whenever a control segment is read that marks the start of a transaction.

Syntax

• C#
• VB.NET

public event OnStartTransactionHandler OnStartTransaction;

public delegate void OnStartTransactionHandler(object sender, VdareaderStartTransactionEventArgs e);

public class VdareaderStartTransactionEventArgs : EventArgs {
  public string Tag { get; }
  public string ControlNumber { get; }
  public string Code { get; }
  public string FullSegment { get; }
}

Public Event OnStartTransaction As OnStartTransactionHandler

Public Delegate Sub OnStartTransactionHandler(sender As Object, e As VdareaderStartTransactionEventArgs)

Public Class VdareaderStartTransactionEventArgs Inherits EventArgs
  Public ReadOnly Property Tag As String
  Public ReadOnly Property ControlNumber As String
  Public ReadOnly Property Code As String
  Public ReadOnly Property FullSegment As String
End Class

Remarks

The StartTransaction event will fire when a control segment marking the start of a transaction is read. The Tag parameter contains the tag of the segment, such as ST. ControlNumber contains the control number associated with the segment. Code contains the transaction code (such as 810).

Warning Event (VDAReader Component)

Fires whenever a validation warning is encountered.

Syntax

• C#
• VB.NET

public event OnWarningHandler OnWarning;

public delegate void OnWarningHandler(object sender, VdareaderWarningEventArgs e);

public class VdareaderWarningEventArgs : EventArgs {
  public int WarnCode { get; }
  public string Message { get; }
  public int SegmentNumber { get; }
  public string SegmentTag { get; }
  public string TechnicalErrorCode { get; }
  public string SegmentErrorCode { get; }
  public string ElementErrorCode { get; }
  public int ElementPosition { get; }
}

Public Event OnWarning As OnWarningHandler

Public Delegate Sub OnWarningHandler(sender As Object, e As VdareaderWarningEventArgs)

Public Class VdareaderWarningEventArgs Inherits EventArgs
  Public ReadOnly Property WarnCode As Integer
  Public ReadOnly Property Message As String
  Public ReadOnly Property SegmentNumber As Integer
  Public ReadOnly Property SegmentTag As String
  Public ReadOnly Property TechnicalErrorCode As String
  Public ReadOnly Property SegmentErrorCode As String
  Public ReadOnly Property ElementErrorCode As String
  Public ReadOnly Property ElementPosition As Integer
End Class

Remarks

The Warning event will fire during parsing of a segment of an EDI document. The WarnCode parameter contains the type of warning encountered. Message is a textual description of the problem. SegmentNumber is the index of the segment where the problem was found.

SegmentTag holds the tag name of the segment. SegmentErrorCode holds the error code that may be used in the IK304 field of a 999. ElementErrorCode holds the error code that may be used in the IK403 field of a 999. ElementPosition is the position of the element where the error occurred.

It's very important to note that segment validation happens right in the middle of the parsing process. Because of this, the Warning event will usually fire long before the validated segment becomes the current segment for the parser state. This means you cannot access the parser properties to examine the current segment in relation with the Warning event when the event fires.

Possible WarnCode values are:

TechnicalErrorCode holds a technical error code that helps identify structural issues with the document. For instance when parsing an X12 document this will hold values that may be used for TA1 error codes. When parsing X12 documents the following codes are applicable:

EDIElement Type

An Element within an EDI Segment.

Remarks

An EDI Segment contains one or more Elements. Elements can either be simple (they just contain a value) or they may be composite (containing more than one Component).

A simple element will simply contain a Value. For a composite element you must iterate over the components it contains by setting the ComponentIndex field, and then using the ComponentValue field to get the value at the corresponding index.

Fields

2005: 137
2005: 137
2380: 201612151441

DTM0101: 137
DTM0101: 137
DTM0102: 201612151441

98: ST
93: BUYSNACKS PORT
66: 9
67: 1223334445

N101: ST
N102: BUYSNACKS PORT
N103: 9
N104: 1223334445

Config Settings (VDAReader Component)

VDAREADER Config Settings

Base Config Settings

Trappable Errors (VDAReader Component)

VDAReader Errors