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IWMSFileDescriptions::get_length
The get_length method retrieves the number of file description objects contained in the collection.
Syntax
HRESULT get_length( long* pVal );
Parameters
pVal
[out] Pointer to a long representing the number of file description objects contained in the collection.
Return Values
If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.
| Return code | Number | Description |
| E_POINTER | 0x80004003 | pVal is a NULL pointer argument. |
Remarks
If the publishing point path references a playlist, the get_length method returns 1. It does not retrieve the number of media files referenced by the playlist.
This is the JScript version of the IWMSFileDescriptions::get_Count method. It is included for developers more comfortable with JScript syntax.
Example Code
#include <windows.h>
#include <atlbase.h> // Includes CComBSTR and CComVariant.
#include "wmsserver.h"
// Declare variables and interfaces.
IWMSServer *pServer;
IWMSFileDescriptions *pFileDescriptions;
HRESULT hr;
CComVariant varIndex;
CComBSTR bstrPath;
long lCount;
// Initialize the COM library and retrieve a pointer
// to an IWMSServer interface.
hr = CoInitialize(NULL);
hr = CoCreateInstance(CLSID_WMSServer,
NULL,
CLSCTX_ALL,
IID_IWMSServer,
(void **)&pServer);
if (FAILED(hr)) goto EXIT;
// Retrieve a pointer to an IWMSFileDescriptions interface
// and retrieve the total count of descriptions.
bstrPath = "file://c:\\wmpub\\wmroot";
hr = pServer->get_FileDescriptions(bstrPath,
WMS_FILE_UNSPECIFIED,
&pFileDescriptions);
if (FAILED(hr)) goto EXIT;
hr = pFileDescriptions->get_length(&lCount);
if (FAILED(hr)) goto EXIT;
EXIT:
// TODO: Release temporary COM objects and uninitialize COM.
Requirements
Header: wmsserver.h.
Library: WMSServerTypeLib.dll.
Platform: Windows Server 2003 family, Windows Server 2008 family.
See Also
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