WPF中的MessageBox功能

Question

I am trying to create a MessageBox that appears at the start of my program, asking the user if they would like to load a file or not. So far I have:

public static void LoadFile(object sender, FormClosingEventArgs e)
{
    System.Windows.MessageBox.Show("Would you like to load a file?",
    System.Windows.MessageBoxButton.YesNo, System.Windows.MessageBoxQuestion);

    if (result == DialogResult.No)
    {
        // cancel the closure of the form.
        e.Cancel = true;
    }
}

I realize that some of this code is used to exit out of the program. I don't intend to do this, it is just currently still left in from the sample code I was trying. When I try this code, I receive several errors, the major one involves the MessageBoxQuestion . The error reads

The type or namespace name 'MessageBoxQuestion' does not exist in the namespace System.Windows

I previously had this error on the MessageBoxButtons but fixed it by changing it to MessageBoxButton . Starting with just a simple message box, I originally had the code:

public static void LoadFile()
{
    System.Windows.MessageBox.Show("Text");
}

This worked perfectly fine, despite the fact that I had to add the System.Windows. to remove the error

The name MessageBox does not exist in the current context.

Does anyone know a solution as to how I can get my MessageBox working correctly?

Answer 1

The WPF version of MessageBox differs from the Windows Forms' version. You need to use this overload.

Answer 2

Here is what I finally came up with:

public static void LoadFile()
    {
        // Configure message box 
        string message = "Would you like to load a file?";
        string caption = "Startup";
        System.Windows.MessageBoxButton buttons = System.Windows.MessageBoxButton.YesNo;
        System.Windows.MessageBoxImage icon = System.Windows.MessageBoxImage.Information;
        // Show message box
        System.Windows.MessageBoxResult result = 
           System.Windows.MessageBox.Show(message, caption, buttons, icon);
        if(result == System.Windows.MessageBoxResult.Yes)
        {

        }
        else if(result == System.Windows.MessageBoxResult.No)
        {

        }
   }

I included the if else branch that I planned to use later.