Getting the control of a context menu
I have a context menu that looks like this
A
|--1
|--2
|--3
I need to access the object that the context menu is called from, after selecting 1 2 or 3
meaning if this is a context menu of a textbox1 then I need to access that object开发者_如何学JAVA, how do I do that?
Forgot to mention, this is a WPF application. so Im using the System.Windows.Controls and the ContextMenu is created programmatically
You can walk up the tree and get the control from the ContextMenu.PlacementTarget
, e.g.
private void MenuItem_Click(object sender, RoutedEventArgs e)
{
var item = sender as MenuItem;
while (item.Parent is MenuItem)
{
item = (MenuItem)item.Parent;
}
var menu = item.Parent as ContextMenu;
if (menu != null)
{
var droidsYouAreLookingFor = menu.PlacementTarget as TextBox;
//...
}
}
You can look at the SourceControl property of the ContextMenuStrip that owns the context menu item that was clicked.
For example, in the Click handler for the menu item:
private void aToolStripMenuItem_Click(object sender, EventArgs e)
{
var control = ((sender as ToolStripMenuItem).Owner as ContextMenuStrip).SourceControl;
...
}
Of course if you only have one ContextMenuStrip on the form, you can just reference it directly
var control = myContextMenuStrip.SourceControl;
Slight tweak to HB's answer. HB deserves the credit. Helped me find a DataGrid.
private void MenuItem_Click(object sender, RoutedEventArgs e)
{
MenuItem item = sender as MenuItem;
ContextMenu cm = (ContextMenu)item.Parent;
Popup popup = (Popup)cm.Parent;
var finalGoal = popup.PlacementTarget as DataGrid;
}
use the
ContextMenu.SourceControl
that's the variable that calls the context menu. all you need to do is cast the control
found the answer from a similar question
Get owner of context menu in code viky's code works, but I had to cast it twice.
I guess looping the casting of the Parent is possible for better flexibility (more casts depends on how deep the clicked item is)
Ugly Solution
I am searching for a better way to do the same thing. For now, the code below works:
TextBlock tb = ((sender as MenuItem).Parent as ContextMenu).PlacementTarget as TextBlock;
Replace TextBlock
with your control's type.
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