对话框必须是用户启动的问题和异步。请求

Question

我得到EN“”对话框必须为用户启动”错误。

任何线索怎么可能解决？

谢谢！

private void ExportDataToCSV() 
     { 
      string separator = GetSeparator(); 

      LoadClientContentItemStatistics(); // async. request of MVVM Light Toolkit 

      foreach (var item in this._view) 
      { 
       sb.AppendLine("\"" + item.Player.PlayerGroup.Name + "\"" + separator + "\"" + item.Player.Name + "\"" + separator + "\"" + item.ClientContentItem.Name + "\"" + separator + "\"" + item.TotalTime.ToString() + "\"" + separator + "\"" + item.TotalQuantity.ToString() + "\"" + separator + Environment.NewLine); 
      } 
      SaveFileDialog sfd = new SaveFileDialog() 
      { 
       DefaultExt = "csv", 
       Filter = "CSV Files (*.csv)|*.csv|All files (*.*)|*.*", 
       FilterIndex = 1 
      }; 
      if (sfd.ShowDialog() == true) // "Dialogs must be user-initiated" ERROR 
      { 
       using (Stream stream = sfd.OpenFile()) 
       { 
        using (StreamWriter writer = new StreamWriter(stream)) 
        { 
         writer.Write(sb.ToString()); 
         writer.Close(); 
        } 
        stream.Close(); 
       } 
      } 

      IsExport = true; 
     } 

Answer 1

此错误正是它说：用户必须启动这个对话框，所以你只能从用户点击事件或其他用户启动的事件中调用这个方法