如何从控制台应用程序上传文件到ASP.NET MVC [英] How to upload a file to ASP.NET MVC from a console application

问题描述

我试图让一个控制台应用程序发送一个XML文件到ASP.NET MVC 3中开发的Web应用程序，并接收另一个XML作为响应。
$ b

控制台应用程序返回的错误是：
$ b

远程服务器返回一个错误：（500）内部服务器错误。

当我运行Fiddler2时，发现这个错误：

对象引用未设置为对象的实例。

控制台应用程序中的代码是：

  static void Main（string [] args）
 {
 var wc = new WebClient（）; 
 byte [] response = wc.UploadFile（http://mysite.com/Tests/Test，POST，teste.xml）; 
 string s = System.Text.Encoding.ASCII.GetString（response）; 
 Console.WriteLine（s）; 
 Console.ReadKey（）; 
 
  

MVC控制器中的代码是：

  [HttpPost] 
 public ActionResult Test（HttpPostedFileBase文件）
 {
 XElement xml = XElement.Load（new System.IO .StreamReader（file.InputStream））; 
 var test = new MyTest（）; 
 return File（test.RunTest（xml），text / xml，testresult.xml）; 
 
 $ / code> $ / pre> 
 
 
  RunTest（）因为这个方法工作，当我通过表单上传文件（在一个名字相同的方法，使用方法GET）。  RunTest（）返回XML与响应。
 
 
 
当我调试MVC应用程序时，变量文件为空！
 
 
 
如何修复？在我的控制台应用程序中，为了实际发送文件，需要更改哪些内容？或者是改变MVC方法？
 
 
而且，在尝试使用 WebClient 之前，我试过了这里的代码： http://msdn.microsoft.com/en-us/library/您的问题是WebClient.UploadFile不是发布的。使用名为file的输入将MVC设置为multipart / form-data的表单映射到的表单。尝试改变你的服务器端的方法：
 
 pre $ 
 public ActionResult Test（）
 { 
 var file = Request.Files [0] as HttpPostedFile; 
 XElement xml = XElement.Load（new System.IO.StreamReader（file.InputStream））; 
 var test = new MyTest（）; 
 return File（test.RunTest（xml），text / xml，testresult.xml）; 
} 
  

I'm trying to have a console application to send a XML file to a web application developed in ASP.NET MVC 3, and receive another XML as a response.

The error returned in the console application is:

The remote server returned an error: (500) Internal Server Error.

When I get Fiddler2 running, I see this error:

Object reference not set to an instance of an object.

The code in the console application is:

static void Main(string[] args)
{
    var wc = new WebClient();
    byte[] response = wc.UploadFile("http://mysite.com/Tests/Test", "POST", "teste.xml");
    string s = System.Text.Encoding.ASCII.GetString(response);
    Console.WriteLine(s);
    Console.ReadKey();
}

The code in the MVC Controller is:

[HttpPost]
public ActionResult Test(HttpPostedFileBase file)
{
    XElement xml = XElement.Load(new System.IO.StreamReader(file.InputStream));
    var test = new MyTest();
    return File(test.RunTest(xml), "text/xml", "testresult.xml");
}

RunTest() works well, since this method works when I upload the file via form (in a method with the same name, using method GET). RunTest() returns the XML with the response.

When I debug the MVC application, I see the problem: the variable file is null!

How do I fix that? What do I have to change in my console application for it to actually send a file? Or is it the case to change the MVC method?

And, before trying to use WebClient, I tried this code here: http://msdn.microsoft.com/en-us/library/debx8sh9.aspx, and had the same results.

解决方案

Your problem is that WebClient.UploadFile isn't posting a form with the enctype set to multipart/form-data using an input named "file" for MVC to map to. Try changing your server side method to this:

[HttpPost]
public ActionResult Test()
{
    var file = Request.Files[0] as HttpPostedFile;
    XElement xml = XElement.Load(new System.IO.StreamReader(file.InputStream));
    var test = new MyTest();
    return File(test.RunTest(xml), "text/xml", "testresult.xml");
}

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