在.NET中构建POST请求主体的内置方法?

时间:2009-06-03 16:58:00

标签: .net http post

我在.NET中寻找一个内置实用程序方法,用于为两种常见内容类型构建HTTP POST消息体:

  • 应用程序/ x-WWW窗体-urlencoded
  • 的multipart / form-data的

我宁愿使用别人的准备和测试的实现,而不是使用自己的实现,即使我意识到这样做并不困难。但是System.Web似乎没有任何结果。

有什么建议吗?

(无需解释如何手动构建POST消息体......这不是这个问题的内容)

3 个答案:

答案 0 :(得分:2)

更简单,我喜欢WebClient.UploadValues方法。只需给它一个NameValueCollection,然后处理其余部分:

http://msdn.microsoft.com/en-us/library/system.net.webclient.uploadvalues.aspx

答案 1 :(得分:0)

对于application/x-www-form-urlencoded内容类型,只需使用UrlEncode方法。

示例(在C#中):

string body =
   "this=" + HttpUtility.UrlEncode(valueForThis) +
   "&" +
   "that=" + HttpUtility.UrlEncode(valueForThat) +
   "&" +
   "more=" + HttpUtility.UrlEncode(valueForMore);

答案 2 :(得分:-2)

Imports System.IO
Imports System.Net

Private Function PostWebPage(ByVal argUrl As String) As String
    Dim objWebRequest As HttpWebRequest
    Dim sPostData As New StringBuilder
    Dim sr As StreamReader
    Dim objWebResponse As HttpWebResponse
    If argUrl.Length > 0 Then
        Try
            objWebRequest = CType(WebRequest.Create(argUrl), HttpWebRequest)
            objWebRequest.UserAgent = "Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+.NET+CLR+1.1.4322;+.NET+CLR+1.0.3705)"
            sPostData.Append("accountType=GOOGLE&Email=*******@gmail.com&Passwd=*******&service=analytics&source=Test")
            objWebRequest.Method = "POST"
            objWebRequest.ContentType = "application/x-www-form-urlencoded"
            objWebRequest.ContentLength = sPostData.ToString.Length
            Dim stOut As New StreamWriter(objWebRequest.GetRequestStream, System.Text.Encoding.ASCII)
            stOut.Write(sPostData)
            stOut.Close()
            objWebRequest.AllowAutoRedirect = True
            objWebRequest.Timeout = 10000
            objWebRequest.KeepAlive = True
            objWebResponse = CType(objWebRequest.GetResponse(), HttpWebResponse)
            sr = New StreamReader(objWebResponse.GetResponseStream)
            Return sr.ReadToEnd
            Exit Function
        Catch ex As Exception
        End Try
    End If
    Return ""
End Function
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