webclient

WCF Post / WebRequest Works - WebClient doesn't

Hi, I have a WCF Service declared as follows: [OperationContract, XmlSerializerFormat] [WebInvoke(UriTemplate = "ProessUpload", BodyStyle = WebMessageBodyStyle.Bare, RequestFormat = WebMessageFormat.Xml)] void ProcessUpload(ProductConfig stream); I am trying to call this service using WebClient but I am always getting a response...

Silverlight's WebClient isn't connecting to my server

Hi, I've got a problem here. I've got an ASP.net website hosting a silverlight 2 application. I'd like the site to communicate to and fro from the silverlight app, and I'm doing this via http requests. Incidentally, if anyone knows a better way, please do tell me. My server's got the following http listener set up. I copied this from a...

Uploading files to server

I am trying to upload a file from my Windows application to the server into a particular Folder using C#. However, I am getting an exception: "An exception occurred during a WebClient request". Here is my code: for (int i = 0; i < dtResponseAttach.Rows.Count; i++) { string filePath = dtResponseAttach.Rows[i]["Response"]; WebC...

System.Net.WebClient fails weirdly

I am trying to download some data from the reporting services instance on our TFS server. Given that the code should run on a computer that is not domain-joined, I figured that I would set the credentials myself. No luck, got a HTTP 401 Unauthorized back. Ok, so I hooked up Fiddler to see what was happening. But that's when I got He...

How to fill forms and submit with Webclient in C#

Hey, I'm new at using the the libraries WebClient, HttpResponse and HttpRequest in C#, so bare over with me, if my question is confusing to read. I need to build a WinForm based on C# which can open a URL, which is secured with the basic authorization. I did this with adding this to the header, like this: using (WebClient wc = ...

How do you pass user credentials from WebClient to a WCF REST service?

I am trying to expose a WCT REST service and only users with valid username and password would be able to access it. The username and password are stored in a SQL database. Here is the service contract: public interface IDataService { [OperationContract] [WebGet(ResponseFormat = WebMessageFormat.Json)] byte[] GetData(doubl...

Opening an image on demand with Silverlight 2 WebClient

I'm trying to show some images on my silverlight application whenever user wants to. The images are in a folder in my silverlight project and I don't want the user to download all of them when he/she loads the web page for the first time. I have tried the OpenReadAsync method with a relative address to the image file which is in a fold...

C# webclient and proxy server

Hello, I am using a web client class in my source code for downloading a string using http. This was working fine. However, the clients in the company are all connected now to a proxy server. And the problem started from this. When I have tested my application I don't think it can pass through the proxy server, as the exception that k...

Simulate a request from a IE Client with WebClient class?

I am downloading files with the WebClient class in .NET 3.5. I would like to be sure that on the server side, the files requested appear to be downloaded with a IE client. What do I have to change exactly? Do I have simply to copy the header information generated by IE to the Header property of the WebClient object? Is there anything e...

WebClient.UploadValues Duplicate Key

I am having a bit of difficulty proxying a request on my site. In theory, this should work webClient.UploadValues(url, "POST", HttpContext.Current.Request.Form); Unfortunately, the form contains a duplicate key "elemKey" When I use HTTP Analyzer and look at the post data it shows that key three times, with three different values. Par...

How to check if a file exists on a server using c# and the WebClient class

In my application I use the WebClient class to download files from a Webserver by simply calling the DownloadFile method. Now I need to check whether a certain file exists prior to downloading it (or in case I just want to make sure that it exists). I've got two questions with that: What is the best way to check whether a file exists o...

UploadString (Post Method) in VB.NET doesn't work

Hi, I am trying to post simple data to some site, in this example to a php file on my local server. My VB.NET Code: Dim W As New Net.WebClient Dim A As String = "" W.Encoding = System.Text.Encoding.UTF8 Dim URL As String = "http://localhost/test/p.php" A = W.UploadString(URL, "bla=test") MsgBox(A) and here the p.php: <? print_r($_P...

.NET Sharepoint Create Directory

I can upload a file to sharepoint with the webclient as follows using (System.Net.WebClient webclient = new System.Net.WebClient()) { System.Net.NetworkCredential credentials = new System.Net.NetworkCredential( Encryptor.Decrypt(ConfigurationManager.AppSettings["username"]), Encryptor.Decrypt(ConfigurationManager.AppSettings[...

How can I programmatically remove the 2 connection limit in WebClient

Those "fine" RFCs mandate from every RFC-client that they beware of not using more than 2 connections per host... Microsoft implemented this in WebClient. I know that it can be turned off with App.config: <?xml version="1.0" encoding="utf-8" ?> <configuration> <system.net> <connectionManagement> <add address="*" maxconnecti...

The underlying connection was closed: An unexpected error occurred on a receive.

When I try my program on my win2k8 machine it runs fine but on win 2k3 it gives me this error that error message here's the code that' generating the error WebClient wc = new WebClient(); wc.DownloadFile("ftp://ftp.website.com/sample.zip"); there's the weird part. if i disable the firewall on the server completely. the error goes aw...

C# get rid of Connection header in WebClient

I'm using the C# using the WebClient(). I was testing out what headers are sent, and I noticed that the following header is automatically added. Connection : Keep-Alive Is there any way to remove this? ...

Why does WebClient timeout when trying to crawl this shortened URL??

All, I have a small webcrawler that sometimes has to crawl twitter and pull out URL's. I use a modified version of the Webclient class provided in the .net framework. Normally this works fine, even with shortened URL's from sites such as bit.ly. However, with the following url: http://is.gd/CioW The webclient times out. Its meant to ...

Download HTML content that require authorization?

I use WebClient from System.Net Namespace of Visual Studio 2008 to download the HTML content. It done well with normal website but with some 4rum that require authorization such as warez-bb.org, it always return the HTML of the login page. I wonder if there is a way to send the username and password to the WebClient? ...

.NET: Do I need to keep a reference to WebClient while downloading asynchronously?

I use the following method in a piece of production code: private void DownloadData(Uri uri) { WebClient webClient = new WebClient(); DownloadDataCompletedEventHandler eh = null; eh = delegate(object sender, DownloadDataCompletedEventArgs e) { webClient.DownloadDataCompleted -= eh; ...

Silverlight WebClient Progressive Download

I'm trying to progressively download an array of serialised data. The goal is to send a single large block from the server, and partially process it on the client whilst it downloads. I'm using the System.Net.WebClient class and setting it's AllowReadStreamBuffering property to false. According to the MSDN documentation, this should all...