How to call a web page as Post method from Windows Form Application?

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  you can't really, not unless you maybe use the HttpWebRequest/response classes. But even then I'm not sure.

  Sunday, September 10, 2006 4:18 PM
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  Is there a way to do this if I use WebBrowser class?Like create a form/submit page with hidden varibles in it?
  So only submit button should be visible and somehow make it to open new window not in WebBrowser control but in default browser?
  

  Sunday, September 10, 2006 4:40 PM
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  could be possible - in the webbrowser class/control take a look at the document property and its property (body, outer/inner html/text etc....)

   

  Sunday, September 10, 2006 4:44 PM
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  Hi msmuser, I dont really understand what u want to achieve but here is one way of doing it if u dont need to open any browser, just send your data via POST method.

  
  

  // Using WebRequest to send data to a website
  WebRequest request = WebRequest.Create("http://blabla.com/answer.aspx");

  //Set method property
  request.Method = "POST";
  //Create POST data
  string postData = "myfirstdata=" + TextBox1.Text + "&myseconddata=" + TextBox2.Text;
  //and convert it to byte array
  byte[] dataBuffer = System.Text.Encoding.UTF8.GetBytes(postData);
  //Set ContentType property of the request
  request.ContentType = "application/x-www-form-urlencoded";
  //Set ContentLength property of the request
  request.ContentLength = dataBuffer.Length

   //Get request stream
   Stream postStream = request.GetRequestStream();
   //Write data to request stream
   postStream.Write(dataBuffer, 0, dataBuffer.Length);
   //Close stream object
   postStream.Close();
  
  And then if u need to get response, just use WebResponse class and make use of the response stream.

  Hope this helps.

  Shah
  

  Monday, September 11, 2006 6:30 AM
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  I used WebClient instead.It seems to be just for those kinds of tasks.
  Now the problem is the page is giving me response "Not signed in...".And page is using cookies for authentication.
  Thats the reason I tried to call Browser so I would already be authenticated.
  
  I discovered CookieContainer class but WebClient doesnt seem to have that.So do I need to switch to HttpWebRequest instead?
  

  Tuesday, September 12, 2006 4:29 PM
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  Try using this method:

  HttpWebRequest myReq = WebRequest.Create(http://you_web_address);
  myReq.CookieContainer = new CookieContainer();
  myReq.CookieContainer.Add(new Cookie("name", "value"));
  HttpWebResponse myRes = (HttpWebResponse)myReq.GetResponse();
  string response = "";
  Stream stream = myRes.GetResponseStream();
  StreamReader reader = new StreamReader(stream, System.Text.Encoding.GetEncoding("utf-8"));
  response = reader.ReadToEnd();
  stream.Close; reader.Close(); myRes.Close();
  webBrowser1.DocumentText = response;

  of course you will need a web browser control in your form

  Tuesday, September 12, 2006 5:54 PM
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  Well I found code on the web how to extend WebClient to accept cookies.
  
  

  public class WebClientExtended : WebClient
  {
          private CookieContainer myContainer;
          private HttpWebRequest myRequest;
          private string myMethod;
  

          public string Method
          {
                  get { return myMethod; }
                  set { myMethod = value; }
          }
  

          public CookieContainer Cookies
          {
                  get
                  {
                          if (myContainer == null)
                          {
                                  myContainer = new CookieContainer();
                          }
                          return myContainer;
                  }
                  set
                  {
                          myContainer = value;
                  }
          }
  

          protected override WebRequest GetWebRequest(Uri address)
          {
                  myRequest = (HttpWebRequest)base.GetWebRequest(address);
                  myRequest.Method = this.Method;
                  myRequest.CookieContainer = Cookies;
                  return myRequest;
          }
  

          protected override WebResponse GetWebResponse(WebRequest request)
          {
                  return myRequest.GetResponse();
          }
  

          protected override WebResponse GetWebResponse(WebRequest request, IAsyncResult result)
          {
                  return myRequest.EndGetResponse(result);
          }

  
  

  Tuesday, September 12, 2006 11:22 PM
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  Dim url As String = ("http://localhost:1080/Test/")
          Dim postdata As String = "username=myname"
          Dim request As HttpWebRequest = CType(WebRequest.Create(url), HttpWebRequest)
          Dim page As String
          Try
              Dim postsourcedata As String = postdata
              request.KeepAlive = False
              request.ProtocolVersion = HttpVersion.Version10
              request.Method = "POST"
              request.ContentType = "application/x-www-form-urlencoded"
              request.ContentLength = postsourcedata.Length
              request.AllowAutoRedirect = True
              request.MaximumAutomaticRedirections = 10
              request.Timeout = CType((New TimeSpan(0, 0, 60)).TotalMilliseconds, Integer)
              request.UserAgent = "Mozilla/3.0 (compatible; My Browser/1.0)"
              Dim writeStream As Stream = request.GetRequestStream
              Dim bytes As Byte() = System.Text.Encoding.ASCII.GetBytes(postsourcedata)
              writeStream.Write(bytes, 0, bytes.Length)
              writeStream.Close()
              Dim response As HttpWebResponse = CType(request.GetResponse, HttpWebResponse)
              Dim responseStream As Stream = response.GetResponseStream
              Dim readStream As StreamReader = New StreamReader(responseStream, Encoding.UTF8)
              page = readStream.ReadToEnd
  
          Catch ee As Exception
              page = "fail!" & ee.Message
          Finally
  
          End Try
          MsgBox(page)
  
  ---------------------------------------------------------------------------
  when I am executing this code I am getting error like
  1: The remote server returned an error: (405) Method Not Allowed.
  OR
  2:The underlying connection was closed: An unexpected error occurred on a receive.

  Friday, January 19, 2007 1:56 PM
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  Hi

  You can use XMLHTTP Object as follows

  just add reference of  the msxml6.dll

  ''' <summary>

  ''' HttpPost Contains static functions to send/post data to

  ''' webservice of studio application.

  ''' </summary>

  Public Class HttpPost

   

      ''' <summary>

      ''' Posts data to webservies of StudioApp

      ''' and gets the response from webservice

      ''' </summary>

      ''' <param name="DATA_TO_POST">data that you want to post</param>

      ''' <returns>response text send by webservies</returns>

      Shared Function PostData(ByRef DATA_TO_POST As String) As String

          Dim http As New MSXML2.XMLHTTP()

          ModPreference.WEBSERVICE_URL.Preferense = "http://localhost/Test/Default.aspx"

          http.open("POST", ModPreference.WEBSERVICE_URL.Preferense, False)

          http.setRequestHeader("content-type", "application/x-www-form-urlencoded")

          http.send(DATA_TO_POST)

          Return http.responseText

      End Function

   

      Shared Function PostData(ByVal Url As String, ByRef DATA_TO_POST As String) As String

          Dim http As New MSXML2.XMLHTTP()

          http.open("POST", Url, False)

          http.setRequestHeader("content-type", "application/x-www-form-urlencoded")

          http.send(DATA_TO_POST)

          Return http.responseText

      End Function

   

   

  End Class

   

  you can access posted data using Request.Params()

   

  Wednesday, January 24, 2007 8:39 AM
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  Thank you so much for your wonderful reply :)

  Wednesday, February 7, 2018 7:54 AM