private void Open_Dialogue_Click(object sender, RoutedEventArgs e)
        {
            Button btn = (Button)sender;

            System.Windows.Forms.OpenFileDialog ofld = new System.Windows.Forms.OpenFileDialog();
            ofld.Filter      = "音频|*.mp3";
            ofld.Multiselect = false;
            if (ofld.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                this.sourceFilePath = ofld.FileName;
                if (!string.IsNullOrWhiteSpace(sourceFilePath))
                {
                    this.destFilePath = UploadUtil.uploadFile(sourceFilePath);
                    this.saveToDB(destFilePath);
                }
            }
        }