Problem while attempting to change selected index of a tabControl

The problem i face is quite annoying.

I have a tabControl with the 2 tabItems(Home,Show) The Home tab starts as Visible and Show as Hidden

In Home i have an image for which i handle the MouseLeftButtonDown event. This event should change the visibility of Show TabItem and make it Selected.

At the code i have a tabControl.SelectedIndex = 1; which forces the tabControl SelectionChangeEvent (which i use to change the foreground of the Show and Home TabItems).

The problem i face is that instead of the focus to get passed to Show, it remains on Home. I have no problem with the code, because at the last step of the SelectionChange event handler ,which is the last function that gets executed by my code, what i see in the ui is correct.

So what gets executed after that? Can anybody help?

private void Main_clientImage_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)  
{  
     开发者_StackOverflow社区    showMenu.Visibility = Visibility.Visible;  
         setTabSelected("showMenu");  
}   



public void setTabSelected(String name)  
{  
   for (int i = 0; i  tabControl.Items.Count ; i++)  
   {  
         TabItem item = tabControl.Items.GetItemAt(i) as TabItem;  
         if (item.Name.Equals(name))  
         {  
             selectedTab=i;  
             tabControl.SelectedIndex = i;  
             item.Foreground = new SolidColorBrush(Colors.Black);  
         }  
         else  
         {  
             item.Foreground = new SolidColorBrush(Colors.White);  
         }  
     }  
}  

private void tabControl_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
      for (int i = 0; i  tabControl.Items.Count; i++)
      {
          TabItem item = tabControl.Items.GetItemAt(i) as TabItem;
           if (tabControl.SelectedIndex == i)
           {
               item.Foreground = new SolidColorBrush(Colors.Black);
           }
           else
           {
               item.Foreground = new SolidColorBrush(Colors.White);
           }
       }
}

//EDIT: I solved it by adding a simple e.Handler = true at MouseLeftButtonDown event. Whats wrong with this thing???

I changed the SelectedItem of TabControl in a method
void open_Click(object sender, RoutedEventArgs e)
and did it from a <Button Click="open_Click" and from a <DataGrid MouseDoubleClick="open_Click".

Only by adding

e.Handled = true;

at the end of in method open_Click it worked for the MouseDoubleClick as Fotis mentioned in the question.

There is problem with your code.

private void Main_clientImage_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)  
{  
    showMenu.Visibility = Visibility.Visible;  
    homeMenu.Visibility = Visibility.Hidden;
    setTabSelected("showMenu");  
}   

public void setTabSelected(String name)  
{  
    for (int i = 0; i < tabControl.Items.Count; i++)  
    {  
        TabItem item = tabControl.Items.GetItemAt(i) as TabItem;  
        if (item.Header.Equals(name))  
        {  
            selectedTab = i;  
            item.IsSelected = true; 
            item.Foreground = new SolidColorBrush(Colors.Black);  
        }
        else  
        {  
            item.Foreground = new SolidColorBrush(Colors.White);  
        }  
    }  
}  

private void tabControl_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    for (int i = 0; i < tabControl.Items.Count; i++)
    {
        TabItem item = tabControl.Items.GetItemAt(i) as TabItem;
        if (tabControl.SelectedIndex == i)
        {
            item.Foreground = new SolidColorBrush(Colors.Black);
        }
        else
        {
            item.Foreground = new SolidColorBrush(Colors.White);
        }
    }
}

In the above code I am checking item.Header.Equals(name) and set item.IsSelected = true. Sometimes selectionindex doesn't work properly. The above code should address your problem.

After the SelectedItem property of the TabControl has changed, you need to make sure that SelectedItem.IsFocused = true. If not just use SelectedItem.Focus() right after you changed the SelectedItem property. It helped in my case.