Hi everybody!
I'm new on C# programming. I have a main form in my Windows applications that contains other form as a Explorer of folders. I don't want to allow to drag the Explorer form (FrmExplorer). FrmExplorer has a TreeView. I have been looking for information about it and have written the following code:
public partial class FrmExplorer : Form
{
public FrmExplorer(string fileName)
{
InitializeComponent();
//To cancel dragging the form
this.QueryContinueDrag += new System.Windows.Forms.QueryContinueDragEventHandler(this.FrmExplorer_CancelDrag);
this.DragEnter += new System.Windows.Forms.DragEventHandler(this.FrmExplorer_EnterDrag);
this.DragOver += new System.Windows.Forms.DragEventHandler(FrmExplorer_DragOver);
this.AllowDrop = false;
}
private void FrmExplorer_CancelDrag(object sender, QueryContinueDragEventArgs e)
{
e.Action = DragAction.Cancel;
}
private void FrmExplorer_EnterDrag(object sender, System.Windows.Forms.DragEventArgs e)
{
e.Effect = DragDropEffects.None;
}
private void FrmExplorer_DragOver(object sender, System.Windows.Forms.DragEventArgs e)
{
// Determine whether string data exists in the drop data. If not, then
// the drop effect reflects that the drop cannot occur.
if (!e.Data.GetDataPresent(typeof(System.String)))
{
e.Effect = DragDropEffects.None;
return;
}
}
}
I have set the method FrmExplorer_CancelDrag in FrmExplorer Properties in the event QueryContinueDrag. But I still cannot reach the method FrmExplorer_CancelDrag when dragging the form to cancel that action.
Does anybody can help me to know what I'm doing wrong or what is it missing?
Thanks a lot in advance,
Elvia
PS: Windows application in Microsoft Visual C# 2005