输入流在mvc 4 asp.net中 [英] Input stream in mvc 4 asp.net

问题描述

对于MVC 4中的Web API我试图在控制器中获取http resquest post的输入流我总是得到字节数组的长度= 53但是字节数组是空的所以当我转换时它变成了一个字符串我继续得到一个空字符串



这就是我正在使用的：



< pre lang =vb> Dim InStream As Stream
Dim Len 作为 整数
InStream = HttpContext.Current.Request .InputStream
InStream = CType （InStream，Stream）
Len = CInt （ InStream.Length）
Dim ByteArray（Len） As 字节
InStream.Read（ByteArray， 0 ，Len）
Dim js onParam As String
jsonParam = System.Text.Encoding.UTF8.GetString（ByteArray）

i认为它来自这一行：

 InStream = HttpContext.Current.Request.InputStream 
 

但我没有找到如何更换它



请注意客户端发送的字符串是一个JSON字符串



任何帮助？

解决方案

I发现流是在最后，我将必须将其设置为开头

  Dim  InStream  As  Stream 
  Dim  Len  As   Integer  
 InStream = HttpContext.Current.Request.InputStream 
 InStream =  CType （InStream，Stream）
 Len =  CInt （InStream.Length）
  Dim  ByteArray（Len）作为 字节 
 InStream.Seek（ 0 ，SeekOrigin。开始）; 
 InStream.Read（ByteArray， 0 ，Len）
  Dim  jsonParam  As   String  
 jsonParam = System.Text.Encoding.UTF8.GetString（ByteArray）

for a web API in MVC 4 i'm trying to get the input stream of a http resquest post in the controller i'm always getting the length of the byte array = 53 but the byte array is empty so when i convert it to string i keep getting an empty string

this is what i'm using:

Dim InStream As Stream
Dim Len As Integer
InStream = HttpContext.Current.Request.InputStream
InStream = CType(InStream, Stream)
Len = CInt(InStream.Length)
Dim ByteArray(Len) As Byte
InStream.Read(ByteArray, 0, Len)
Dim jsonParam As String
jsonParam = System.Text.Encoding.UTF8.GetString(ByteArray)

i think it's from this line :

InStream = HttpContext.Current.Request.InputStream

but i did not find how to replace it

note that the string the client is sending is a JSON string

any help?

解决方案

I found that the stream is at the end, i will have to set it to the beginning

Dim InStream As Stream
Dim Len As Integer
InStream = HttpContext.Current.Request.InputStream
InStream = CType(InStream, Stream)
Len = CInt(InStream.Length)
Dim ByteArray(Len) As Byte
InStream.Seek(0, SeekOrigin.Begin);
InStream.Read(ByteArray, 0, Len)
Dim jsonParam As String
jsonParam = System.Text.Encoding.UTF8.GetString(ByteArray)

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