Gets the number of items to be used from the data source.
Assembly: System.Web (in System.Web.dll)
Use the property to determine the number of items to be used from the data source. The value returned depends on whether paging is enabled and whether custom paging is used.
If paging is enabled (by setting the IsPagingEnabled property to true) and custom paging is enabled (by setting the IsCustomPagingEnabled property set to true), the value of the PageSize property is returned.
If paging is enabled (by setting the IsPagingEnabled property to true), custom paging is disabled (by setting the IsCustomPagingEnabled property false), and the IsLastPage property is set to true, the value of the DataSourceCount property is subtracted from the value of the FirstIndexInPage property before it is returned.
If the DataSource property contains null, 0 is returned.