Difference between revisions of "Other handles (file, sql)"

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(Added tip on checking if file is open)
m (Corrected VisFileError codes (in real they are negative values))
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<pre>
Number: ERROR_FILE_NOT_FOUND = 2
+
Number: ERROR_FILE_NOT_FOUND = -2
Number: ERROR_PATH_NOT_FOUND = 3
+
Number: ERROR_PATH_NOT_FOUND = -3
Number: ERROR_TOO_MANY_OPEN_FILES = 4
+
Number: ERROR_TOO_MANY_OPEN_FILES = -4
Number: ERROR_ACCESS_DENIED = 5
+
Number: ERROR_ACCESS_DENIED = -5
Number: ERROR_INVALID_HANDLE = 6
+
Number: ERROR_INVALID_HANDLE = -6
Number: ERROR_NOT_ENOUGH_MEMORY = 8
+
Number: ERROR_NOT_ENOUGH_MEMORY = -8
Number: ERROR_BAD_FORMAT = 11
+
Number: ERROR_BAD_FORMAT = -11
Number: ERROR_OUTOFMEMORY = 14
+
Number: ERROR_OUTOFMEMORY = -14
Number: ERROR_INVALID_DRIVE = 15
+
Number: ERROR_INVALID_DRIVE = -15
Number: ERROR_CURRENT_DIRECTORY = 16
+
Number: ERROR_CURRENT_DIRECTORY = -16
Number: ERROR_NOT_SAME_DEVICE = 17
+
Number: ERROR_NOT_SAME_DEVICE = -17
Number: ERROR_NO_MORE_FILES = 18
+
Number: ERROR_NO_MORE_FILES = -18
Number: ERROR_WRITE_PROTECT = 19
+
Number: ERROR_WRITE_PROTECT = -19
Number: ERROR_NOT_READY = 21
+
Number: ERROR_NOT_READY = -21
Number: ERROR_BAD_COMMAND = 22
+
Number: ERROR_BAD_COMMAND = -22
Number: ERROR_OUT_OF_PAPER = 28
+
Number: ERROR_OUT_OF_PAPER = -28
Number: ERROR_WRITE_FAULT = 29
+
Number: ERROR_WRITE_FAULT = -29
Number: ERROR_READ_FAULT = 30
+
Number: ERROR_READ_FAULT = -30
Number: ERROR_SHARING_VIOLATION = 32
+
Number: ERROR_SHARING_VIOLATION = -32
Number: ERROR_LOCK_VIOLATION = 33
+
Number: ERROR_LOCK_VIOLATION = -33
Number: ERROR_WRONG_DISK = 34
+
Number: ERROR_WRONG_DISK = -34
Number: ERROR_HANDLE_EOF = 38
+
Number: ERROR_HANDLE_EOF = -38
Number: ERROR_HANDLE_DISK_FULL = 39
+
Number: ERROR_HANDLE_DISK_FULL = -39
Number: ERROR_NOT_SUPPORTED = 50
+
Number: ERROR_NOT_SUPPORTED = -50
 
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Revision as of 13:48, 8 February 2010

This page covers handle datatype (Sql, file etc) tips & tricks.

Contents


Pointer2.png What are the errorcodes returned by VisFile functions Pointer.png

The following list are VisFile return codes. They can be found in
SAL Extension V2.04 library.

Number: ERROR_FILE_NOT_FOUND 		= -2
Number: ERROR_PATH_NOT_FOUND 		= -3
Number: ERROR_TOO_MANY_OPEN_FILES 	= -4
Number: ERROR_ACCESS_DENIED 		= -5
Number: ERROR_INVALID_HANDLE 		= -6
Number: ERROR_NOT_ENOUGH_MEMORY 	= -8
Number: ERROR_BAD_FORMAT 		= -11
Number: ERROR_OUTOFMEMORY 		= -14
Number: ERROR_INVALID_DRIVE 		= -15
Number: ERROR_CURRENT_DIRECTORY 	= -16
Number: ERROR_NOT_SAME_DEVICE 		= -17
Number: ERROR_NO_MORE_FILES 		= -18
Number: ERROR_WRITE_PROTECT 		= -19
Number: ERROR_NOT_READY 		= -21
Number: ERROR_BAD_COMMAND 		= -22
Number: ERROR_OUT_OF_PAPER 		= -28
Number: ERROR_WRITE_FAULT 		= -29
Number: ERROR_READ_FAULT 		= -30
Number: ERROR_SHARING_VIOLATION 	= -32
Number: ERROR_LOCK_VIOLATION 		= -33
Number: ERROR_WRONG_DISK 		= -34
Number: ERROR_HANDLE_EOF 		= -38
Number: ERROR_HANDLE_DISK_FULL 	= -39
Number: ERROR_NOT_SUPPORTED 		= -50


Pointer2.png How to check if a file is already opened Pointer.png

Use this to check if a file is already opened.

   If SalFileOpen( hFile, sFile, OF_Share_Exclusive )
      ! File was not open, now it is and it is locked by this process
      ! ... do file stuff ...
      ! Dont forget to close the file
      ! Call SalFileClose( hFile )
   Else
      ! File is opened by this or another process