c# 异步请求demo

public static async Task<List<Syncchip>> DownSyncchipList(int id)

{

using (var client = new HttpClient())

{

try

{

string url = ApiServer.url+"/school/door/syncchip";

var content1 = new FormUrlEncodedContent(new Dictionary<string, string>()

{

//{"un","孙磊"},

{"school_id", id.ToString()}

});

HttpResponseMessage response = await client.PostAsync(url, content1);

response.EnsureSuccessStatusCode();//用来抛异常的

string responseBody = await response.Content.ReadAsStringAsync();

ReponseSyncchip resModel = JsonConvert.DeserializeObject<ReponseSyncchip>(responseBody);

if (resModel.status == "200")

{

//修改该数据的IsUnLineSent的值

try

{

List<Syncchip> syncchip = resModel.data;

return syncchip;

}

catch (Exception se)

{

//MessageBox.Show(se.ToString());

//logger.Error("修改数据库失败" + se.Message);

}

}

else

{

//MessageBox.Show("失败");

}

}

catch (Exception ex)

{

// MessageBox.Show("网路请求失败！");

return null;

}

}

return null;

}

Stopwatch watch = new Stopwatch();

watch.Start();

Func<Task<List<Student>>> func_student = new Func<Task<List<Student>>>(() => ApiServer.DownStudentList(chool_id));

student = await Task.Run(func_student);

watch.Stop();