WPF MessageBox出現兩次

Question

我正在使用以下代碼來顯示帶有ok和Cancel按鈕的MessageBox。當我點擊任何按鈕時，同樣的消息框再次出現。這段代碼有什麼問題嗎？

 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

因爲你調用MessageBox.Show兩次......

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

您正在通過MessageBox.Show撥打兩次消息框。你可能想刪除第一

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