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Using HttpWebRequest to send POST image data

P: 4
Hello, I am trying to use HttpWebRequest to send some POST
I have accomplished this using:

HttpWebRequest req = (HttpWebRequest)
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
string postData = "login=value1&pwd=value2&file=filename"
req.ContentLength = postData.Length;

StreamWriter stOut = new

but i am getting response Upload problem but when i am uploading file using html Form-based File Upload then file is uploading it is showing upload success.
Sep 30 '08 #1
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5 Replies

Expert 5K+
P: 7,872
You set the content length before building all the content
Sep 30 '08 #2

P: 4
hi i am uploading image by this method but i am getting upload problem response.plz anyone give me solution.

private void postImage()
HttpWebRequest request ;
request = (HttpWebRequest)HttpWebRequest.Create("url");

string strfileName = FileUpload1.PostedFile.FileName;

string strLogin = "login="+txtLogin.Text;
string strPassword = "&pass=" + txtPassword.Text;
string strFile1 = @"&file="+ strfileName;

string strRequestMessage = strLogin+strPassword+strFile1;

request.Method = "POST";
request.ContentLength = strRequestMessage.Length ;
request.ContentType = "application/x-www-form-urlencoded";

request.KeepAlive = true;

//Create StreamWriter object
StreamWriter objStreamWriter = new StreamWriter(request.GetRequestStream());


//Get the response
System.Net.HttpWebResponse objWebResponse = (HttpWebResponse)request.GetResponse();
System.IO.StreamReader objStreamReader = new System.IO.StreamReader(objWebResponse.GetResponseS tream());
string strResponse = objStreamReader.ReadToEnd().Trim();

Sep 30 '08 #3

Expert 5K+
P: 7,872
Please do not double post your questions. It is against the posting guidelines.


Now then, Where exactly are you reading in the contents of the file you wish to upload and sending that? I do not see it in the code provided, it appears you do not do it at all.
Sep 30 '08 #4

P: 4
i am sending name of the file in strFileName. Do i need to send byte array of the file
Sep 30 '08 #5

Expert 5K+
P: 7,872
Yes, that is how it works. You need do some kinda of content disposition heading too I think which could be tricky.
I recomend searching for a quick example on the web, there should be plenty.
Sep 30 '08 #6

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