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How do I select a listbox item by its tag in WPF and then disable it.

Posted on 2008-10-28
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Last Modified: 2013-11-12
Hello Everyone,

I am trying to select a listbox item by its tag value and then disabling it. I have no clue on how to this wiht a WPF control. Can someone show me an example on how to achieve this?
Thanks,

Stephane
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Question by:MrTouya
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6 Comments
 
LVL 39

Expert Comment

by:itsmeandnobodyelse
ID: 22830389
I found some sample code which may help.

private:
   void listBox1_SelectedIndexChanged( Object^ /*sender*/, System::EventArgs^ /*e*/ )
   {
      // Get the currently selected item in the ListBox.
      String^ curItem = listBox1->SelectedItem->ToString();

      // Find the string in ListBox2.
      int index = listBox2->FindString( curItem );

      // If the item was not found in ListBox 2 display a message box,
      //  otherwise select it in ListBox2.
      if ( index == -1 )
            MessageBox::Show( "Item is not available in ListBox2" );
      else
            listBox2->SetSelected( index, true );
   }
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Author Comment

by:MrTouya
ID: 22833866
This is what I have to do now. Is there a better way of doing the same?
 

private void MenuButtonState(string MenuButtonName, string State)
{
ListBoxItem CurrentSelectedItem = (ListBoxItem)this.MenuButtons.SelectedItem;
ListBoxItem SelectionToChangeStateOf = (ListBoxItem)this.MenuButtons.FindName(MenuButtonName);
ItemCollection MenuItems = this.MenuButtons.Items;
int IndexToDisable = MenuItems.IndexOf((ListBoxItem)SelectionToChangeStateOf);
int CurrentSelectedIndex = MenuItems.IndexOf((ListBoxItem)CurrentSelectedItem);
MenuButtons.SelectedItem = IndexToDisable;
if (State == "Disabled")
SelectionToChangeStateOf.IsEnabled = false;
else SelectionToChangeStateOf.IsEnabled = true;
MenuButtons.SelectedItem = CurrentSelectedItem;
}
 
Thanks,
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LVL 39

Expert Comment

by:itsmeandnobodyelse
ID: 22843946
Does it work?

>>>> SelectionToChangeStateOf = (ListBoxItem)this.MenuButtons.FindName(MenuButtonName);

Does the FindName return a (reference to a) ListBoxItem or does it return an index? In the latter case you hardly could cast an integer to a ListBoxItem.
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Author Comment

by:MrTouya
ID: 22846853
It Works. I have tried other ways, but this is the best way that I have come up with that works.
 
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LVL 39

Accepted Solution

by:
itsmeandnobodyelse earned 250 total points
ID: 22851066
>>>> It Works.

That is good. I personally have only little experience with managed C++ and WPF but I would try simpler code like


private void MenuButtonState(string MenuButtonName, string State)
{
    ListBoxItem SelectionToChangeStateOf = (ListBoxItem)this.MenuButtons.FindName(MenuButtonName);
    if (State == "Disabled")
         SelectionToChangeStateOf.IsEnabled = false;
    else
         SelectionToChangeStateOf.IsEnabled = true;
}

If your code above was working that one should work as well, right?
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Author Comment

by:MrTouya
ID: 22855251
Yep. That is much more elegant.

Thanks,
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