WebApi~通过HttpClient来调用Web Api接口

异步请求

///<summary>
/// HttpClient实现Post请求(异步)
/// </summary>
static async void dooPost()
{
    string url = "http://localhost:52824/api/register";
     //设置HttpClientHandler的AutomaticDecompression
    var handler = new HttpClientHandler() { AutomaticDecompression = DecompressionMethods.GZip };
    //创建HttpClient（注意传入HttpClientHandler）
    using (var http = new HttpClient(handler))
    {
        //使用FormUrlEncodedContent做HttpContent
        var content = new FormUrlEncodedContent(new Dictionary<string, string>()
        {    {"Id",""},
             {"Name","添加zzl"},
             {"Info", "添加动作"}//键名必须为空
         });

        //await异步等待回应

        var response = await http.PostAsync(url, content);
        //确保HTTP成功状态值
        response.EnsureSuccessStatusCode();
        //await异步读取最后的JSON（注意此时gzip已经被自动解压缩了，因为上面的AutomaticDecompression = DecompressionMethods.GZip）
        Console.WriteLine(await response.Content.ReadAsStringAsync());
    }

}
/// <summary>
/// HttpClient实现Get请求(异步)
/// </summary>
static async void dooGet()
{
    string url = "http://localhost:52824/api/register?id=1";
    //创建HttpClient（注意传入HttpClientHandler）
    var handler = new HttpClientHandler() { AutomaticDecompression = DecompressionMethods.GZip };

    using (var http = new HttpClient(handler))
    {
        //await异步等待回应
        var response = await http.GetAsync(url);
        //确保HTTP成功状态值
        response.EnsureSuccessStatusCode();

        //await异步读取最后的JSON（注意此时gzip已经被自动解压缩了，因为上面的AutomaticDecompression = DecompressionMethods.GZip）
        Console.WriteLine(await response.Content.ReadAsStringAsync());
    }
}
/// <summary>
/// HttpClient实现Put请求(异步)
/// </summary>
static async void dooPut()
{
    var userId = ;
    string url = "http://localhost:52824/api/register?userid=" + userId;

    //设置HttpClientHandler的AutomaticDecompression
    var handler = new HttpClientHandler() { AutomaticDecompression = DecompressionMethods.GZip };
    //创建HttpClient（注意传入HttpClientHandler）
    using (var http = new HttpClient(handler))
    {
        //使用FormUrlEncodedContent做HttpContent
        var content = new FormUrlEncodedContent(new Dictionary<string, string>()
        {
           {"Name","修改zzl"},
           {"Info", "Put修改动作"}//键名必须为空
        });

        //await异步等待回应

        var response = await http.PutAsync(url, content);
        //确保HTTP成功状态值
        response.EnsureSuccessStatusCode();
        //await异步读取最后的JSON（注意此时gzip已经被自动解压缩了，因为上面的AutomaticDecompression = DecompressionMethods.GZip）
        Console.WriteLine(await response.Content.ReadAsStringAsync());
    }

转载：https://blog.csdn.net/smartsmile2012/article/details/51613596

同步请求：

         /// <returns></returns>
         public static string DoorAllList()
         {
             var result = "";
             string url = "http://www.baidu.com/Api/GetDoorUserList";
             //创建HttpClientHandler的AutomaticDecompression
             var handler = new HttpClientHandler() { AutomaticDecompression = DecompressionMethods.GZip };
             //创建一个httpClient;
             using (var client = new HttpClient(handler))
            {
                 //同步请求
                 var response = client.GetAsync(url);
                 //在这里会等待response返回。
                 var ret = response.Result;
                 //最终等待返回结果
                result = ret.Content.ReadAsStringAsync().Result;
             }
            return result;
        }