Contextmenustrip displays blank item..

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Hi,
I am opening contextmenustrip on treeview node right click,
but when i press down key on contextmenustrip, selection moves down & at last it is showing blank item,
why it is happening.
Some contextmenustrip item are visible=false.
When all items of contextmenustrip are visible, contextmenustrip works properly,
but if some contextmenustrip item are visible=false it shows blank item at last.

I have snap but i am unble to paste it here...:-(

Posted 14-Jan-14 23:07pm

RhishikeshLathe

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Karthik_Mahalingam 15-Jan-14 5:11am

post your code...

RhishikeshLathe 15-Jan-14 6:04am

how can i paste snap here?

2 solutions

Solution 1

In a simple experiment, I am unable to duplicate the behavior you describe.

1. put a TreeView on a Form

2. add some Nodes

3. add a ContextMenuStrip to the Form. Add four items.

4. set the TreeView's ContextMenuStrip Property to the ContextMenuStrip

5. in the NodeMouseClick EventHandler for the TreeView:

C#

private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
{
    contextMenuStrip1.Items[0].Visible = (! (e.Node.Name == "Node0")); 
    contextMenuStrip1.Items[2].Visible = (! (e.Node.Name == "Node2")); 
}

I see no blank items when I right-context-click on "Node0" or "Node2," and the up/down arrow keys work as expected.

Posted 14-Jan-14 23:34pm

BillWoodruff

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RhishikeshLathe 15-Jan-14 6:03am

exactly same code, but in my project there is MDI form which contains treeview.
There is lots of other code on form

BillWoodruff 15-Jan-14 7:37am

MDI is weird ! In general, it is not a good idea to put Controls directly on the MDI Form because of the way they will interact with MDIChildForms. Perhaps you will recall the discussion here:

http://www.codeproject.com/Answers/705138/MDI-form-click-event

RhishikeshLathe 15-Jan-14 8:28am

thank you sir,
i found it and posted the solution.
Please go through it & if need suggest optimization.

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RhishikeshLathe · Accepted Answer · 2014-01-15T00:44:00

I didn't found why above problem happening in my project:-
But i found following solution on it:-

1.Set following property of ContextMenustrip:-

contextMenuStrip1.AutoSize = false;

2.Register contextMenuStrip Opened event as follows:-

C#

private void contextMenuStrip1_Opened(object sender, EventArgs e)
      {
          int iHeight = 0;
          foreach (ToolStripMenuItem t in contextMenuStrip1.Items)
          {
              if (t.Visible)
                  iHeight += t.Size.Height;
          }
          contextMenuStrip1.Height = iHeight + 5;
      }