WPF，C＃使用VS2010

Question

I made Binding with CheckBox ,Lable, implemented BoolToVisibleOrHidden class, means when checkBox1.IsChecked Lable should be displayed, what I want to implement is in checkbox checked EventHandler, I want to implement with MessageBox. If Messabox.Yes then only Label should be displayed,

 <CheckBox Name="_checkBoxExpertMode" IsChecked="{Binding Path=DisplayChecked, Mode=TwoWay}" 
 <Lable  Name="_lableDisplay" Visibility="{Binding Path=DisplayChecked, Mode=OneWay, NotifyOnTargetUpdated=True, Converter={StaticResource BoolToVisConverter}}"
                                                          />

 System.Windows.Forms.DialogResult dialogResult = System.Windows.Forms.MessageBox.Show("Sure", "Some Title", System.Windows.Forms.MessageBoxButtons.YesNo);
              if (dialogResult == System.Windows.Forms.DialogResult.Yes)
            {
                _checkBoxExpertMode.IsChecked = true;
            }
           else if (dialogResult == System.Windows.Forms.DialogResult.No)
           {
               _checkBoxExpertMode.IsChecked = false;
           }

But Label is displaying before Messagebox popup.

Help me, thanks in advance

Answer 1

Drop the binding on the checkbox and use the Checkbox.Checked event .

<CheckBox Name="..." Checked="CheckBox_Checked"  />

In the event handler, display the message box and use a property to indicate if the label should be displayed :

public class MyWindow
{
    public bool ShouldLabelBeDisplayed { get; set; }

    public void CheckBox_Checked(object sender, RoutedEventArgs e)
    {
        DialogResult dialogResult = MessageBox.Show(...);
        if (dialogResult == DialogResult.Yes)
        {
            ShouldLabelBeDisplayed = true;
        }
        else
        {
            ShouldLabelBeDisplayed = false;
        }
    }

Finally, bind the Visible property of your label to this property :

    <Label Name="..." Visibility="{Binding Path=ShouldLabelBeDisplayed, Converter={StaticResource BoolToVisConverter}}" />

It might not be exactly this but you get the idea.

Answer 2

tru to make a property of label to:

yourlabel.Visibility="Hidden". 

Then when you want to show, you should make property:

yourlabel.Visibility="Visible".