Gets a value indicating whether the System.Web.UI.DataSourceView object associated with the current System.Web.UI.DataSourceControl object supports retrieving the total number of data rows, instead of the data.
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A data-bound control can request a total row count by adding the DataSourceCapabilities.RetrieveTotalRowCount field to the System.Web.UI.DataSourceSelectArguments object passed to the DataSourceView.ExecuteSelect(DataSourceSelectArguments) method. If a data-bound control requests a total row count, but the DataSourceView.CanRetrieveTotalRowCount property returns false, the data source view throws an exception.