1.下载RestSharpNuGet包

2.请求类和响应类

public class ApiRequest
{
    /// <summary>
    /// 请求地址
    /// </summary>
    public string Route { get; set; }

    /// <summary>
    /// 请求方式
    /// </summary>
    public Method Method { get; set; }

    /// <summary>
    /// 请求参数
    /// </summary>
    public Object Parameters { get; set; }

    /// <summary>
    /// 请求头，表示发送的请求的类型、数据格式等
    /// </summary>
    public string ContentType { get; set; } = "application/json";
}

public class ApiResponse
{
    public int Code { get; set; }

    public string Msg { get; set; }

    public Object Data { get; set; }
}

3.封装请求工具类

 public class HttpClient
 {
     private readonly RestClient Client; // 客户端
     private readonly string baseUrl = "http://localhost:63615/api/";

     public HttpClient()
     {
         Client = new RestClient();
     }

     /// <summary>
     /// 执行请求
     /// </summary>
     /// <param name="request">请求数据</param>
     /// <returns>响应数据</returns>
     public ApiResponse Execute(ApiRequest ApiRequest)
     {
         var request = new RestRequest(ApiRequest.Method);

         request.AddHeader("Content-Type", ApiRequest.ContentType);

         if (ApiRequest.Parameters!= null)
         {
             // SerializeObject 序列化参数 object -> json
             request.AddParameter("params", JsonConvert.SerializeObject(ApiRequest.Parameters), ParameterType.RequestBody);
         }
         // 设置请求地址
         Client.BaseUrl = new Uri(baseUrl + ApiRequest.Route);

         // 发送请求
         var res = Client.Execute(request);
         if (res.StatusCode == System.Net.HttpStatusCode.OK)
         {
             // 反序列化响应数据 json -> object
             return JsonConvert.DeserializeObject<ApiResponse>(res.Content);
         }
         else
         {
             return new ApiResponse { Code = (int)res.StatusCode, Msg = res.ErrorMessage };
         }
     }
 }

4. 在接口中引入该类，并在构造函数中初始化

private readonly IEventAggregator _eventAggregator;

public LoginUCViewModel(HttpClient httpClient)
{
    //请求Client
    _httpClient = httpClient;
}

5.发送请求

// 发送请求
ApiRequest apiRequest = new ApiRequest();
// 请求方式
apiRequest.Method = RestSharp.Method.POST;
// 请求地址(这里只写这一段是因为定义的时候定义了baseUrl
apiRequest.Route = "Account/Register";
AccountInfoDto.Password = Md5Helper.GetMd5(AccountInfoDto.Password);
apiRequest.Parameters = AccountInfoDto;
ApiResponse response = _httpClient.Execute(apiRequest);

 到此，简单的请求封装就结束了