private async void send_Click(object sender, RoutedEventArgs e) { if (string.IsNullOrEmpty(feedbackTextBox.Text.Trim())) { var dialog = new MessageDialog("反馈不能为空哦!"); var cmdOK = new UICommand("确定"); dialog.Commands.Add(cmdOK); dialog.CancelCommandIndex = 0; var result = await dialog.ShowAsync(); return; } else if (!NetworkHelper.CheckInternet()) { var dialog = new MessageDialog("当前无网络!"); var cmdOK = new UICommand("确定"); dialog.Commands.Add(cmdOK); dialog.CancelCommandIndex = 0; var result = await dialog.ShowAsync(); return; } if (dataLoader == null) { dataLoader = new DataLoader(); } if (dataLoader.Busy) { return; } string url = "http://data.meitu.com/feedback_iphone.php&"; string param = string.Empty; param += "&" + "software" + "=" + "WPMTTT"; param += "&" + "version" + "=" + "1.0.0.0"; param += "&" + "module" + "=" + "WindowsPhone"; param += "&" + "message" + "=" + feedbackTextBox.Text.Trim(); param += "&" + "contact" + "=" + contactTextBox.Text.Trim(); param += "&" + "itype" + "=" + feedbackType; url = string.Format("http://data.meitu.com/feedback_iphone.php?{0}", param); dataLoader.Load(url, OnSent); }