problem in adding an event in the treeview

problem in adding an event in the treeview

• Akwest

  Sigme, sorry, I pasted the wrong event handler.  Use this one.
  MikeD
  
  this.myTreeview.DoubleClick +=new System.EventHandler(myTreeview_DoubleClick);

  
  

• mattyo

  Sigme,
  
  I use a Before and After Select event to change the color of the selected node.
  I don't use a double click event, but I also use a MouseClick event to dropdown a menu when the user RightClicks a selected node.  You may want to go to that if you don't like the double click event.
  
  The selected node looses it shading if you click elswhere on the form, but it is still selected.  That is why I had to go to the before and after to keep it hi-lighted in a different color.
  
  You inspect the selected node this way in your double click event.
  
  if (myTreeview.SelectedNode !=null){
     MessageBox.Show("you doubleclicked on:"+myTreeview.SelectedNode.Text)
  }
  
  MikeD
  

• MitkoB

  thanks man it worked but still there is a problem ,this event works if i double click any where in the control(treeview). But i need to generate an event only when i double click in the nodes.
  

• markybark

  thanks MikeD it worked but not in the way that i wanted
  cuz if i click any node once and then double click anywhere else in the control area it still works as the selected node still remains selected . I want to deselect all the selected nodes if the user selects on the other areas of  the control
  how can i do that 
  anyway something is better than nothing
  

• SydneyGentleman

  Hi Sigme,
  Here is the designer portion that adds the event.
  
  this.myTreview.DoubleClick += new System.EventHandler(this.myTreeView_DoubleClick);
  
  then add the myTreeView_DoubleClick method

  private void myTreeview_DoubleClick(object sender, EventArgs e){
     // what ever you want to do with the selected node
     myTreeview.SelectedNode.Text="Howdy"
  
  }
  
  MikeD
  

  
  

• serimc

  You also need to change this piece to the EventArgs.
  Mike D
  
  

  private void myTreeview_DoubleClick(object sender, EventArgs e){
     // what ever you want to do with the selected node
     myTreeview.SelectedNode.Text="Howdy"
  
  

  
  

• Daniel Miller

  thanks but still there is a problem because i used the code you gave but when i build the solution i get the following error message
  
  Cannot implicitly convert type 'System.Windows.Forms.TreeViewCancelEventHandler' to 'System.EventHandler'
  
  please help me with this. Is there any alternative method to respond when the user double clicks only the node not the treeview area
  

  
  

• Nikolaus Brennig

  Sigme,
  
  You may be able to set the selection during the double click event.
  Look up Drag and Drop on a treeview.  It uses the mouse position to locate the selection in the treeview.
  
  I have not done any Drag and Drop yet, so I can't help,
  
  MikeD
  
• problem in adding an event in the treeview