Gets the number of items that will be used from the data source for the current page.
Assembly: System.Web.Extensions (in System.Web.Extensions.dll)
Use theproperty to determine the number of items that will be used from the data source. The value returned is determined by the following criteria:
If the current page is not the last page and the MaximumRows property is set to a value that is less than 0, the value of the DataSourceCount property is subtracted from the value of the StartRowIndex property before it is returned.
If the DataSource property is null, 0 is returned.
Available since 3.5