/// <summary>
/// Invoking BeginningDrag Event if specified
/// </summary>
/// <param name="args"></param>
protected virtual void OnBeginningDrag(BeginningDragEventArgs args)
{
if (this.BeginningDrag != null)
{
this.BeginningDrag(this, args);
}
}
/// <summary>
/// Initiate Drag Process in the DragQuery Event Handler
/// </summary>
/// <param name="gridView">RadGridView object</param>
/// <param name="dragDropArgs">DragDropQueryEventArgs object</param>
/// <returns>
/// <value = "True">DragEvent successfully initiated</value>
/// <value = "False">DragEvent cancelled</value>
/// </returns>
private bool InitiateDrag(RadGridView gridView, DragDropQueryEventArgs dragDropArgs)
{
var itemsToDrag = this.GetItemsToReorder(gridView);
var eventArgs = new BeginningDragEventArgs(gridView, itemsToDrag);
this.OnBeginningDrag(eventArgs);
if (!eventArgs.Cancel)
{
dragDropArgs.Options.Payload = itemsToDrag;
this.OnDragStarted(new DragStartedEventArgs(gridView, itemsToDrag));
}
return(!eventArgs.Cancel);
}