webclient

C# detect page redirect

I am trying to determine if a qualification exists on http://www.accreditedqualifications.org.uk in the form: http://www.accreditedqualifications.org.uk/qualification/50084811.seo.aspx 50084811 being a qualification aim entered by the end user. If they enter an invalid one e.g. http://www.accreditedqualifications.org.uk/qualification...

How to set post parameters in WebClient class in a Silverlight app.

First of all, I wrote a simple php page, that picks up some variables from the POST parameters such as a query and a authentication string, and returns the result as xml. I intend to call this page with the WebClient class from a Silverlight application. I'm using POST because we are querying the database with any valid sql statement, no...

Limit WebClient DownloadFile maximum file size

Hi everyone, In my asp .net project, my main page receives URL as a parameter I need to download internally and then process it. I know that I can use WebClient's DownloadFile method however I want to avoid malicious user from giving a url to a huge file, which will unnecessary traffic from my server. In order to avoid this, I'm looking...

C# WebClient only downloads partial html

Hi, I am working on some scraping app, i wanted to try to get it to work but ran into a problem. I have replaced the original scraping destination in the below code with googles webpage, just for testing. It seems that my download doesnt get everything, i note that the body and the html tags are missing their close tags. How do i get it ...

Downloading file by WebClient Exception

Hello! I have a problem downloading particular file types by WebClient. So there are no problems with usual types - mp3, doc and others, but when I rename file extension to config it returns me: InnerException = {System.Net.WebException: The remote server returned an error: NotFound. ---> System.Net.WebException: The remote server return...

Handling two WebException's properly

Hi Everyone, I am trying to handle two different WebException's properly. Basically they are handled after calling WebClient.DownloadFile(string address, string fileName) AFAIK, so far there are two I have to handle, both WebException's: The remote name could not be resolved (i.e. No network connectivity to access server to downloa...

Client Web Browser Behavior When Handling 301 Redirect

The RFC seems to suggest that the client should permanently cache the response: http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html 10.3.2 301 Moved Permanently The requested resource has been assigned a new permanent URI and any future references to this resource SHOULD use one of the returned URIs. Clients with link...

UploadFile with WebClient unexpectedly closed

I have a webpage http://www.example_page.com. When entering this page I login using the following credentials username: a password: a now on this page there is a web form with an upload formular which uploads the file I enter by post method when I press the ok button. Now I want to realize this in c# with the following code WebClient...

Characters in string changed after downloading HTML from the internet.

Using the following code, I can download the HTML of a file from the internet: WebClient wc = new WebClient(); // .... string downloadedFile = wc.DownloadString("http://www.myurl.com/"); However, sometimes the file contains "interesting" characters like é to é, ← to ↠and フシギダネ to フシギダãƒ. I think it may be something to do...

Can WebClient() download more than one string at the same time? (C#)

I mean can I do something like this: var client = new WebClient(); var result = client.DownloadString(string("http://example.com/add.php"); var result2 = client.DownloadString(string("http://example.com/notadd.php")); in paralel like for 100 url's ? ...

How to download file into string with progress callback?

I would like to use the WebClient (or there is another better option?) but there is a problem. I understand that opening up the stream takes some time and this can not be avoided. However, reading it takes a strangely much more amount of time compared to read it entirely immediately. Is there a best way to do this? I mean two ways, to s...

The remote server returned an error: (404) Not Found.

I am running this piece of code to get the source code (as string) of my webpage. The problem is why this function returns 404 error? Private Function getPageSource(ByVal URL As String) As String Dim webClient As New System.Net.WebClient() Dim strSource As String = webClient.DownloadString(URL) webClient.Dispose() Retur...

UploadFileAsync not asynchronous?

Aight, did a bit of Googling and searching here, the only question I found related was this, although the only answer it had wasn't marked as accepted, is old and is confusing. My problem is basically what I've said in the title. What happens is that the GUI freezes while the upload is in progress. My code: // stuff above snipped publ...

webclient and expect100continue

What is the best way to set expect100continue when using WebClient(C#.NET). I have this code below, I still see 100 continue in the header. Stupid apache still complains with 505 error. string url = "http://aaaa.com"; ServicePointManager.Expect100Continue = false; WebClient service = new WebClient(); ...

WebClient - The remote server returned an error: (403) Forbidden.

Opening a public page from browser works fine. Downloading same page using WebClient throws - (403) Forbidden. What is going on here ? Here is quick copy/paste example (used on console app) to specific page on web: try { WebClient webClient = new WebClient(); string content = webClient.DownloadString("http://he.wikisource.org...

WebClient error when using a thread in .NET

I'm having a very weird error using the WebClient class in .NET 4. The app simply downloads some files off the internet and provides output on a textbox (the GUI is WPF). The method that does this is the following: void DownloadFiles(object files) { fileL = (List<string>) files; foreach (string url in fileL) { byte[...

Silverlight Calling an HttpHandler

I have a Silverlight 2 application that I'm trying to get to invoke an HttpHandler by using WebClient. I have the HttpHandler just sending an email that says test when invoked. If I hit it via a browser, I get the email. However, using a WebClient object with a delegate, I can't seem to get it to connect. I've started to think about us...

WebClient from Asp.net gives "An existing connection was forcibly closed by the remote host" Error

I am trying to post to our asterisk box to parse out the phone list from a console application this works : class Program { static void Main(string[] args) { Console.WriteLine( HttpPost()); System.Threading.Thread.Sleep(10000); } public static string HttpPost() { var URI = @"http://sip....

Proxy support in VB.Net

I'm running the following code to check for updates in my software, and I wonder whether VB.Net will automatically user computer proxy settings: Dim CurrentVersion As String = (New System.Net.WebClient).DownloadString("URL/version.txt") If not, how can I adapt it to use proxy settings? ...

How can I get the WebClient to use Cookies?

I would like the VB.net WebClient to remember cookies. I have searched and tried numerous overloads classes. I want to login to a website via POST, then POST to another page and get its contents whilst still retaining my session. Is this possible with VB.net without using WebBrowser control ? I tried Chilkat.HTTP and it works, but I ...