private void FireSelectingEvent(ObjectContainerDataSourceSelectingEventArgs selectingEventArgs)
{
bool handled = OnSelecting(selectingEventArgs);
if (!handled && UsingServerPaging)
{
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, Resources.UsingServerPagingAndSelectingEventNotHandled));
}
}
/// <summary>
/// Fires the <see cref="ObjectContainerDataSourceView.Selecting"/> event.
/// </summary>
/// <param name="e">The event associated data.</param>
protected virtual bool OnSelecting(ObjectContainerDataSourceSelectingEventArgs e)
{
EventHandler <ObjectContainerDataSourceSelectingEventArgs> handler =
base.Events[SelectingEventKey] as EventHandler <ObjectContainerDataSourceSelectingEventArgs>;
if (handler != null)
{
handler(this, e);
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Gets a list of data from the underlying data storage.
/// </summary>
/// <param name="arguments">A <see cref="DataSourceSelectArguments"/> that is used to request operations on the data
/// beyond basic data retrieval.</param>
/// <returns>An <see cref="IEnumerable"/> list of data from the underlying data storage.</returns>
protected override IEnumerable ExecuteSelect(DataSourceSelectArguments arguments)
{
AddSupportedCapabilities(arguments);
ObjectContainerDataSourceSelectingEventArgs selectingEventArgs = new ObjectContainerDataSourceSelectingEventArgs(arguments);
FireSelectingEvent(selectingEventArgs);
if (selectingEventArgs.Cancel)
{
return(null);
}
SortDataForSelectIfNeeded(arguments);
if (arguments.RetrieveTotalRowCount)
{
arguments.TotalRowCount = _totalRowCount < 0 ? Data.Count : _totalRowCount;
}
if (arguments.MaximumRows > 0)
{
if (UsingServerPaging)
{
GuardTotalRowCountNotNegative(TotalRowCount);
}
else
{
GuardStartRowIndexNotNegative(arguments);
if ((Data.Count == 0 && arguments.StartRowIndex > 0) || (Data.Count > 0 && (arguments.StartRowIndex >= Data.Count)))
{
throw new ArgumentOutOfRangeException(String.Format(CultureInfo.CurrentCulture, Resources.StartRowIndexOutOfRange, arguments.StartRowIndex, Data.Count));
}
int rowsLeft = Data.Count - arguments.StartRowIndex;
int rowCount = Math.Min(rowsLeft, arguments.MaximumRows);
return(Data.GetRange(arguments.StartRowIndex, rowCount));
}
}
return(Data);
}
void TestableObjectContainerDataSource_Selecting(object sender, ObjectContainerDataSourceSelectingEventArgs e)
{
_SelectingFired = true;
}
// <snippet id="Selecting">
protected void CustomersDataSource_Selecting(object sender, ObjectContainerDataSourceSelectingEventArgs e)
{
_presenter.OnSelecting(e.Arguments.StartRowIndex, e.Arguments.MaximumRows, e.Arguments.SortExpression);
}