WPF MessageBox出现两次

Question

I am using following code for showing a MessageBox with ok and cancel button. When I click any button same message box appears again. Is there any problem in this code?

  string messageBoxText = "Uploading Data"; string caption = "Upload Data"; MessageBoxButton button = MessageBoxButton.OKCancel; // Display message box MessageBox.Show(messageBoxText, caption, button, icon); MessageBoxResult res = MessageBox.Show(messageBoxText, caption, button, icon); if (res == MessageBoxResult.OK) { count++; } 

Answer 1

Because you are calling MessageBox.Show two times...

string messageBoxText = "Uploading Data";
    string caption = "Upload Data";
    MessageBoxButton button = MessageBoxButton.OKCancel;                
    // Display message box
    MessageBox.Show(messageBoxText, caption, button, icon); //**Comment this line**
    MessageBoxResult res = MessageBox.Show(messageBoxText, caption, button, icon);
    if (res == MessageBoxResult.OK)
    {
       count++;              
    }

Answer 2

You are calling message box twice via MessageBox.Show . You might want to remove the first

MessageBox.Show(messageBoxText, caption, button, icon);