private async void PostRequestByHWR(object sender, EventArgs e)
{
string url = "http://192.168.1.102:8077/User/PostThing";
IDictionary<string, string> routeParames = new Dictionary<string, string>();
routeParames.Add("str", this.txtInput.Text);
var result = await EasyWebRequest.SendPostHttpRequestBaseOnHttpWebRequest(url, routeParames);
var data = (JsonObject)result;
this.tv.Text = "hey," + data["Val"] + ", i am from httpwebrequest post";
}