DataToSend Property

A string of data to be sent to the remote host. Write-only property.

Syntax

• C++
• Objective-C
• C

ANSI (Cross Platform)
int SetDataToSend(const char* lpDataToSend, int lenDataToSend);

Unicode (Windows)
INT SetDataToSend(LPCSTR lpDataToSend, INT lenDataToSend);

@property (nonatomic,readwrite,assign,getter=dataToSend,setter=setDataToSend:) NSString* dataToSend;
- (NSString*)dataToSend;
- (void)setDataToSend:(NSString*)newDataToSend;

@property (nonatomic,readwrite,assign,getter=dataToSendB,setter=setDataToSendB:) NSData* dataToSendB;
- (NSData*)dataToSendB;
- (void)setDataToSendB:(NSData*)newDataToSend;

#define PID_MCAST_DATATOSEND 3


IPWORKS_EXTERNAL int IPWORKS_CALL IPWorks_MCast_Set(void *lpObj, int propid, int arridx, const void *val, int cbVal);

Default Value

""

Remarks

This write-only property contains a string of data to be sent to the remote host. Assigning a string to this property makes the class send the string to the remote host. The Send method provides similar functionality.

The TCP/IP subsystem attempts to send the string assigned to this property as a complete message. If socket buffers are full, or the message cannot be delivered for any reason, an error is fired, and no portion of the message is sent. This is different from TCP where portions of the messages can be sent. The class sends either a complete message or nothing at all.

If you are sending data to the remote host faster than it can process it, or faster than the network's bandwidth allows, the outgoing queue might fill up. When this happens, this property fails with error 10035: "[10035] Operation would block" (WSAEWOULDBLOCK). You can check this error, and then try to send the data again. .

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

Data Type

Binary String