Web api调用C＃代码后面 [英] Web api call in C# code behind

问题描述

我需要从c＃代码后面调用web APi。这是我在我的代码中添加的功能

 private async void GetToken（）
 {
 
 
 using（HttpClient client = new HttpClient（））
 {
 var request_json =your json string; 
 
 HttpContent content = new StringContent（request_json，Encoding.UTF8，application / json）; 
 
 
 
 client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue（Integration，bhtrdimh =）; 
 client.DefaultRequestHeaders.Accept.Add（new MediaTypeWithQualityHeaderValue（application / json））; 
 
 var httpResponseMessage = await client.PostAsync（https://xxx.xx.com/xx/xx/token，content）; 
 var r = await httpResponseMessage.Content.ReadAsStringAsync（）; 
} 
 
 
} 
 

使用此代码后我收到错误

严重级代码描述项目文件行抑制状态
错误CS1061'Task< HttpResponseMessage>'不包含'GetAwaiter'的定义，也没有扩展方法' GetAwaiter接受型的第一参数‘任务< HttpResponseMessage>’可以找到（是否缺少using指令或程序集引用？）CheckboxWeb C：\Project\RogerDev1\CBE\survey-platform\CheckboxWeb \Forms\Surveys\Invitations\NBVUserlink.aspx.cs 194 Active 

我不明白我的问题在哪里。

任何人都可以做这类工作然后请给我一些示例代码。

提前谢谢



什么我试过了：



搜索谷歌但找不到合适的答案帮我

解决在我的代码中我使用了
$ block $>

 var response = client.PostAsync（external / xxx / token，content）.Result; 

但当我改为

 var response = client.GetAsync（external / xxx / token，content）.Result ; 

它的工作

string apiUrl =http：// localhost：36727 / api / yourapiclass;

使用（VAR客户=新的HttpClient（））
 {
变种JSON = JsonConvert.SerializeObject（YourModel）; 
 var stringContent = new StringContent（json，Encoding.UTF8，
application / json）; 
型=客户端
 .PostAsync（apiUrl + / YourActionName 的StringContent）
。结果
 .Content.ReadAsAsync< ResponseModel>（）结果; 
} 
 

I need to call web APi from c# code behind. This is my function added in my code

private async void GetToken()
      {


          using (HttpClient client = new HttpClient())
          {
              var request_json = "your json string";

              HttpContent content = new StringContent(request_json, Encoding.UTF8, "application/json");



              client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Integration", "bhtrdimh=");
              client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

              var httpResponseMessage = await client.PostAsync("https://xxx.xx.com/xx/xx/token", content);
             var r = await httpResponseMessage.Content.ReadAsStringAsync();
           }


      }

After use this code i getting error

Severity	Code	Description	Project	File	Line	Suppression State
Error	CS1061	'Task<HttpResponseMessage>' does not contain a definition for 'GetAwaiter' and no extension method 'GetAwaiter' accepting a first argument of type 'Task<HttpResponseMessage>' could be found (are you missing a using directive or an assembly reference?)	CheckboxWeb	C:\Project\RogerDev1\CBE\survey-platform\CheckboxWeb\Forms\Surveys\Invitations\NBVUserlink.aspx.cs	194	Active

I don't understand where in my Problem.
Can any one do this type of work then please guide me with some sample code.
Thank you in advance

What I have tried:

search in google but no suitable answer found that help me

解决方案

in my code i use

var response = client.PostAsync("external/xxx/token", content).Result;

but when i change to

var response = client.GetAsync("external/xxx/token", content).Result;

it's work

string apiUrl="http://localhost:36727/api/yourapiclass";

using (var client = new HttpClient())
              {
                  var json = JsonConvert.SerializeObject(YourModel);
                  var stringContent = new StringContent(json, Encoding.UTF8,
                              "application/json");
                  model = client
                                     .PostAsync(apiUrl + "/YourActionName", stringContent)
                                     .Result
                                     .Content.ReadAsAsync<ResponseModel>().Result;
              }

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