My test show in order to enable data caching in the WebGrid you will need to set the AllowAutoDataCaching to true. You will not need to use the AddDataSourceToCache function.

In order to retrieve the cached data please use GetCachedDataSource function.

Hi,

Do you have a sample on this? I actually tried GetCachedDataSource() before. Even when I modify my IntiializeDataSource event to this I doesn't work. 

 protected void Initas(object sender, DataSourceEventArgs e)

        {
            var cachedDS = WebGrid1.GetCachedDataSource();
            var cached = WebGrid1.IsDataCached();
            if (!cached)
                e.DataSource = CommonService.GetCountries();
            else
                e.DataSource = cachedDS;
        }

IsDataCached() keeps returning false. I have on my AllowAutoDataCaching="true" grid tag.

Thanks

Attached is a simple sample that demonstrate the datasource is cached and show the rows count of the data source.

You will also need to have the global.asax file in your project in order to ensure caching works.