Question

我有一个使用ProgressDialog的应用。但问题是，每当我调用我的web服务时，加载图标就会冻结（停止旋转），直到我收到来自我的Web服务的响应。我怎么能克服这个？

以下是我的代码：

ProgressDialog pdLoading;

 pdLoading = new ProgressDialog(this);
 pdLoading.SetMessage("Submiting your query. Please wait...");
 pdLoading.SetCanceledOnTouchOutside(false);
 pdLoading.Show();


 //send to server
 HttpClient client = new HttpClient();
 var jsonParameter = JsonConvert.SerializeObject(obj);
 var content = new StringContent(jsonParameter.ToString(), Encoding.UTF8, "application/json");

//The progress dialog freezes when it calls this method
HttpResponseMessage result = client.PostAsync(WsClasses.GetWsLink() + "/XXX/value1", content).Result;

我也尝试了以下解决方案

public async System.Threading.Tasks.Task<HttpResponseMessage> PostAsync(object inputData, string wsLink)
{
            HttpClient client = new HttpClient();
            var jsonParameter = JsonConvert.SerializeObject(inputData);
            var content = new StringContent(jsonParameter.ToString(), Encoding.UTF8, "application/json");

            HttpResponseMessage result = await client.PostAsync(wsLink, content);

            if (client != null)
                client.Dispose();

            if (pdLoading != null)
                pdLoading.Dismiss();

            return result;
   }

Answer 1

使用await not .result。 Await将允许应用程序在调用Web服务时运行。 .result将导致应用程序在调用Web服务时冻结

 HttpResponseMessage result = await client.PostAsync(WsClasses.GetWsLink() + "/XXX/value1", content)

Xamarin - 修复冻结ProgressDialog

1 个答案: