IWMSCacheProxyCallback.OnRemoveAllCacheItems (C#)

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IWMSCacheProxyCallback.OnRemoveAllCacheItems (C#)

The OnRemoveAllCacheItems is called by the cache plug-in to respond when the server calls IWMSCacheProxy.RemoveAllCacheItems.

Syntax

Parameters

lHr

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

varContext

[in] object containing a value defined by the server to identify which call to IWMSCacheProxy.RemoveAllCacheItems the plug-in is responding to when it calls OnRemoveAllCacheItems. 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.RemoveAllCacheItems( 
               IWMSCacheProxyCallback pCallback,
               object varContext)
{
  try
  {
    // Retrieve the cached items DataTable object
    // from the DataSet object.
    DataTable dt = DS.Tables["CachedItems"];

    // Select and delete all rows.
    DataRow[] drows = dt.Select();
    foreach(DataRow row in drows)
    {
      RemoveEntryFromDatabase();
    }

    // Call IWMSCacheProxyCallback.OnRemoceAllCacheItems().
    pCallback.OnRemoveAllCacheItems(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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