C#4.5 添加了异步调用Web Api 。
如果你的项目是4.5以上版本，可以直接参考官方文档。
http://www.asp.net/web-api/overview/web-api-clients/calling-a-web-api-from-a-net-client
现在项目使用的是C# 4.0 ,需要对HttpClient 进行修改。
当然了你要先添加两个引用 Microsoft.Net.Http和Microsoft.AspNet.WebApi.Client
下面是改造后的HttpClient
public class ResultMessage
{
public string Code { get; set; }
public string Message { get; set; }
public string Content { get; set; }
} public class HttpClientHelper
{
public static string RequestUrl = "http://localhost:1282/"; /// <summary>
/// HttpClient实现Get请求
/// </summary>
public static ResultMessage Get(string url)
{
using (var client = new HttpClient())
{
client.BaseAddress = new Uri(RequestUrl);
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json")); Task<HttpResponseMessage> response = client.GetAsync(url);
var resultMsg = new ResultMessage();
if (response.Result.IsSuccessStatusCode)
{
Task<string> content = response.Result.Content.ReadAsStringAsync();
string resultjson = content.Result;
resultMsg = JsonConvert.DeserializeObject<ResultMessage>(resultjson);
Console.WriteLine("{0}\t{1}\t{2}", resultMsg.Code, resultMsg.Message, resultMsg.Content);
}
else
{
resultMsg.Code = response.Result.StatusCode.ToString();
resultMsg.Message = response.Result.ReasonPhrase;
Console.WriteLine("{0} ({1})", (int) response.Result.StatusCode, response.Result.ReasonPhrase);
} return resultMsg;
}
} /// <summary>
/// HttpClient实现Post请求
/// 执行服务方法
/// </summary>
public static ResultMessage Post(string code, string name)
{
string url = RequestUrl + "api/Biz/Exec"; using (var client = new HttpClient())
{
client.BaseAddress = new Uri(RequestUrl);
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json")); var content = new FormUrlEncodedContent(new Dictionary<string, string>
{
{"code",code}
{"name",name},
});
var resultMsg = new ResultMessage();
Task<HttpResponseMessage> response = client.PostAsync(url, content);
//延时处理
if (response.Result.IsSuccessStatusCode)
{
Task<string> con = response.Result.Content.ReadAsStringAsync();
string resultjson = con.Result;
resultMsg = JsonConvert.DeserializeObject<ResultMessage>(resultjson);
}
else
{
resultMsg.Code = response.Result.StatusCode.ToString();
resultMsg.Message = response.Result.ReasonPhrase;
} return resultMsg;
}
}
}