如何在MVC中将数据从MVC发布到webapi post方法 [英] How do I post data in http header from MVC to webapi post method

问题描述

我正在创建应用程序原型，我在尝试从C＃MVC Controller发送请求标头和正文中的数据，并创建了web api项目Post动作来处理请求。



我的代码是这样的::



MVC项目代码发布请求：

 public class HomeController：Controller 
 {
 public async Task< ActionResult> Index（）
 {
 VM VM = new VM（）; 
 VM.Name =TEST Name; 
 VM.Address =TEST地址; 
 
 using（var client = new HttpClient（））
 {
 client.BaseAddress = new Uri（http：// localhost：58297）; 
 client.DefaultRequestHeaders.Accept.Clear（）; 
 client.DefaultRequestHeaders.Accept.Add（new MediaTypeWithQualityHeaderValue（application / json））; 
 
 client.DefaultRequestHeaders.Add（username，test）; 
 
 var json = JsonConvert.SerializeObject（VM）; 
 var content = new StringContent（json，Encoding.UTF8，application / json）; 
 var result1 = await client.PostAsync（api / Values / Post，content）; 
} 
 
 return View（）; 
} 
} 
 

我在WEB API项目中的代码：

 // POST API /值
公共IHttpActionResult邮政（[FromBody] API.VM VM）
 {
尝试
 {
 HttpRequestMessage重新=新HttpRequestMessage（）; 
 
 StreamWriter sw = new StreamWriter（@E：\ Applele \ txt.log，false）; 
 
 var headers = re.Headers; 
 string token =; 
 
 if（headers.Contains（username））
 {
 token = headers.GetValues（username）。First（）; 
} 
 
 sw.WriteLine（From header+ token）; 
 
 sw.WriteLine（From BODY+ vm.Name）; 
 sw.WriteLine（From BODY+ vm.Address）; 
 sw.WriteLine（Line2）; 
 sw.Close（）; 
返回Ok（成功）; 
} 
 catch（exception ex）
 {
返回InternalServerError（ex）; 
} 
} 
 

我所理解的是[FromBody] API.VM vm从Http请求体获取数据，这意味着vm对象从HTTP Request body获取数据。我能够获取请求体。我无法理解如何从MVC控制器传递数据（我想传递JSON数据）并在WEB Api post方法中检索数据？



< b>我尝试了什么：



我使用过

 client.DefaultRequestHeaders.Add（username，test） ; 
 

在MVC项目中传递头数据和

 HttpRequestMessage re = new HttpRequestMessage（）; 
 var headers = re.Headers; 
 string token =; 
 
 if（headers.Contains（username））
 {
 token = headers.GetValues（username）。First（）; 
} 
 

用于获取数据的WEB API项目中的
但是我无法获得用户名值，< DIV类= h2_lin>解决方案

无需构建具有

新的对象的

HttpRequestMessage重新= <跨度类=代码 - 关键字>新 HttpRequestMessage（）;

使用静态请求而不是

 Request.Headers.TryGetValue（  username， out   var  test）; 

I am creating prototype of application where in I am trying to send data in request header and body from C# MVC Controller and also created web api project Post action to process the request.

My code goes like this::

MVC Project code to Post Request:

public class HomeController : Controller
   {
       public async Task<ActionResult> Index()
       {
           VM VM = new VM();
           VM.Name = " TEST Name";
           VM.Address =  " TEST Address ";

           using (var client = new HttpClient())
           {
               client.BaseAddress = new Uri("http://localhost:58297");
               client.DefaultRequestHeaders.Accept.Clear();
               client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

               client.DefaultRequestHeaders.Add("username","test");

               var json = JsonConvert.SerializeObject(VM);
               var content = new StringContent(json, Encoding.UTF8, "application/json");
               var result1 = await client.PostAsync("api/Values/Post", content);
           }

           return View();
       }
   }

My code in WEB API project :

// POST api/values
public IHttpActionResult Post([FromBody]API.VM vm)
{
    try
    {
        HttpRequestMessage re = new HttpRequestMessage();

        StreamWriter sw = new StreamWriter(@"E:\Apple\txt.log", false);

        var headers = re.Headers;
        string token = "";

        if (headers.Contains("username"))
        {
            token = headers.GetValues("username").First();
        }

        sw.WriteLine("From header" + token);

        sw.WriteLine("From BODY" + vm.Name);
        sw.WriteLine("From BODY" + vm.Address);
        sw.WriteLine("Line2");
        sw.Close();
        return Ok("Success");
    }
    catch (Exception ex)
    {
        return InternalServerError(ex);
    }
}

What I have understood is [FromBody]API.VM vm gets data from Http request body which means vm object is getting data from HTTP Request body.I am able to get request body. I am not able to understand how do I pass data in header from MVC controller (I want to pass JSON Data) and retrieve data in WEB Api post method?

What I have tried:

I have used

client.DefaultRequestHeaders.Add("username","test");

in MVC project to pass header data and

HttpRequestMessage re = new HttpRequestMessage();
              var headers = re.Headers;
              string token = "";

              if (headers.Contains("username"))
              {
                  token = headers.GetValues("username").First();
              }

in WEB API project to get data but I am not able to get username value,

解决方案

No need to construct a new object with

HttpRequestMessage re = new HttpRequestMessage();

use static Request instead

Request.Headers.TryGetValue("username", out var test);

这篇关于如何在MVC中将数据从MVC发布到webapi post方法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！