IWMSCacheProxyCallback.OnRemoveCacheItem (C#)

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IWMSCacheProxyCallback.OnRemoveCacheItem (C#)

The OnRemoveCacheItem method is called by the cache plug-in to respond when the server calls IWMSCacheProxy.RemoveCacheItem.

Syntax

Parameters

lHr

[in] int indicating whether the call to IWMSCacheProxy.RemoveCacheItems was successful.

varContext

[in] object containing a value defined by the server to identify which call to IWMSCacheProxy.RemoveCacheItem the plug-in is responding to when it calls OnRemoveCacheItem. You must pass this value back unaltered.

Return Values

This method does not return a value.

Example Code

The following example assumes that the cache plug-in makes use of the .NET DataSet collection of DataTable objects. Each DataRow object in the data table represents one IWMSCacheDescriptor object.

using System.Data;
using Microsoft.WindowsMediaServices.Interop;
using System.Runtime.InteropServices;

void IWMSCacheProxy.RemoveCacheItem( 
                        string stringOriginUrl,
                        IWMSCacheProxyCallback pCallback,
                        object varContext)
{
  try
  {
    // Call a user-defined function to remove
    // an entry from the cache item database.
    RemoveEntryFromDatabase(stringOriginUrl,true);

    // Call IWMSCacheProxyCallback.OnRemoveCacheItem.
    pCallback.OnRemoveCacheItem(0,varContext);
  }

  catch(Exception e)
  {
    throw new COMException();
  }

  return;
}

Requirements

Reference: Add a reference to Microsoft.WindowsMediaServices.

Namespace: Microsoft.WindowsMediaServices.Interop.

Assembly: Microsoft.WindowsMediaServices.dll.

Library: WMSServerTypeLib.dll.

Platform: Windows Server 2003, Enterprise Edition; Windows Server 2003, Datacenter Edition; Windows Server 2008.

See Also

• IWMSCacheProxyCallback Object (C#)

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