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GetDirectoriesCount

TwinCAT TIA
Local File and directory access Folder

ns=2;s=DEPRAG Smart/Local/FileAndDirectoryAccess/DirectoryAccess/GetDirectoriesCount

The command returns the number of directories contained in the specified path.

Parameters:

Returns:

    GetDirectoriesCount
    A variable of type OpcMethodReturnValueInt32. The Result property contains the command-specific return values.

Examples:

In addition to the parameters already explained, the following variables must be created / transferred for the implementation in TwinCAT 3:

Beckhoff parameter:

    bDirectoryAccessGetDirectoriesCount
    A boolean variable that can be used to trigger the execution of the GetDirectoriesCount command.
    OutputDataDirectoryAccessGetDirectoriesCount
    An instance of "ST_Int32OutputData" into which the return value of the GetDirectoriesCount method is written.
    hrDirectoryAccessGetDirectoriesCount
    This can be used to monitor the execution of the command. Error codes have the type "HRESULT".
    fbDirectoryAccess
    An instance of the "FB_DirectoryAccess" function block supplied with the DEPRAG Smart library.
    sFullPath
    A STRING variable containing the full path of the directory.
    ConnectionHandle
    "ConnectionHandle" received when establishing a connection between DEPRAG Smart Server and your OPC UA client. 


VAR
     bDirectoryAccessGetDirectoriesCount     : BOOL;
     OutputDataDirectoryAccessGetDirectoriesCount  : ST_Int32OutputData;
     hrDirectoryAccessGetDirectoriesCount    : HRESULT;

     fbDirectoryAccess : FB_DirectoryAccess;
END_VAR

hrDirectoryAccessGetDirectoriesCount := fbDirectoryAccess.GetDirectoriesCount(
              bExecute    := bDirectoryAccessGetDirectoriesCount,
              ConnectionHandle  := depragSmartConnection.ConnectionHandle,
              sFullPath   := 'C:\Test',
              OutputData   => OutputDataDirectoryAccessGetDirectoriesCount);
IF hrDirectoryAccessGetDirectoriesCount <> S_FALSE THEN 
     bDirectoryAccessGetDirectoriesCount := FALSE;
END_IF

For examples and explanations regarding the calls of nodes via Siemens TIA Portal please refer to the sub-menu "Siemens TIA Portal" in section "Getting Started".