Web Forms :: Upload File Using WebClient Or HttpWebRequest?
Jan 15, 2010I need upload a file from a website to another website using WebClient or HttpWebRequest.
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Apr 1, 2011I have an aspx website and I'd like to upload a file to it. The file is being processed later, so I need to support some extra information with it.
This is the website I have to far:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Upload.aspx.cs" Inherits="ABC.Web.Upload" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="Form1" method="post" enctype="multipart/form-data" runat="server">
<input type="file" id="File1" name="File1" runat="server" />
<input type="text" id="FileId" name="FileId" runat="server" />
<input type="submit" id="Submit1" value="Upload" runat="server" />
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</body>
</html>
This (and the code behind) works very well when using a browser and clicking through the form. But I want to upload the file using the WebClient from C# code. I don't have to use the WebClient. I can also modify the upload.aspx to suit me, there is no requirement that it works from a browser, but this is the only example I've got working.
Looking at fiddler (I just started using it, so I probably have missed it) I could not figure out how I would create such a request from code.
At the moment when using the WebClient I am specifying the address and the local filename. I have a breakpoint in the code behind in my website but the File1 and FileId are not set (as expected).
How do I have to modify the website and how do I have to use the WebClient to get the upload working?
EDIT: Just found out about the Request.Files, that will give me the file, but how about the other fields?
File Upload With HttpWebRequest Doesn't Post The File
Jun 17, 2010Here is my code to post the file. I use asp fileupload control to get the file stream.
HttpWebRequest requestToSender = (HttpWebRequest)WebRequest.Create [URL]
requestToSender.Method = "POST";
requestToSender.ContentType = "multipart/form-data";
requestToSender.KeepAlive = true;
requestToSender.Credentials = System.Net.CredentialCache.DefaultCredentials;
requestToSender.ContentLength = BtnUpload.PostedFile.ContentLength;
BinaryReader binaryReader = new BinaryReader(BtnUpload.PostedFile.InputStream);
byte[] binData = binaryReader.ReadBytes(BtnUpload.PostedFile.ContentLength);
Stream requestStream = requestToSender.GetRequestStream();
requestStream.Write(binData, 0, binData.Length);
requestStream.Close();
HttpWebResponse responseFromSender = (HttpWebResponse)requestToSender.GetResponse();
string fromSender = string.Empty;
using (StreamReader responseReader = new StreamReader(responseFromSender.GetResponseStream()))
{
fromSender = responseReader.ReadToEnd();
}
XMLString.Text = fromSender;
In the page load of CrossPage.aspx i have the following code
NameValueCollection postPageCollection = Request.Form;
foreach (string name in postPageCollection.AllKeys)
{
Response.Write(name + " " + postPageCollection[name]);
}
HttpFileCollection postCollection = Request.Files;
foreach (string name in postCollection.AllKeys)
{
HttpPostedFile aFile = postCollection[name];
aFile.SaveAs(Server.MapPath(".") + "/" + Path.GetFileName(aFile.FileName));
}
string strxml = "sample";
Response.Clear();
Response.Write(strxml);
I don't get the file in Request.Files. The byte array is created. What was wrong with my HttpWebRequest?
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the code I am using to download is:
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Updated code:
private static void GoGetIt(HttpContext context)
{
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This was working fine, and returning the zip, otherwise if the file didn't exist returning 404. Then on the client side I could handle this:
public bool Download()
{
try
{
using (var client = new WebClient()) [code]....
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Do I need to put the uploading in a separate thread, or is there any other simple way solve this?
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