UpdatePageBlob Method
Updates a page blob's size and/or sequence number.
Syntax
int UpdatePageBlob(const QString& qsPageBlob, qint64 lNewSize, int iSequenceNumAction, qint64 lNewSequenceNum);
Remarks
This method updates the size and/or sequence number of the specified PageBlob in the container currently selected by Container.
NewSize must either be -1 (to keep the page blob's current size), or a multiple of 512; i.e. NewSize % 512 == 0. If NewSize is less than the page blob's current size, all pages above the specified value are cleared.
SequenceNumAction determines how the page blob's sequence number should be changed; possible values are:
| None (0) | The page blob's sequence number remains unchanged. NewSequenceNum is ignored. |
| Increment (1) | The page blob's sequence number is incremented by 1. NewSequenceNum is ignored. |
| Update (2) | The page blob's sequence number is set to NewSequenceNum. |
| Use Greater (3) | The page blob's sequence number is set to the greater of NewSequenceNum and the current sequence number. |
In cases where NewSequenceNum is used, it must be a value in the range 0 to 2^63 - 1, inclusive.
If the specified blob has an active lease, its lease Id must be specified using LeaseId, or the request will fail.
Error Handling
This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)