C# - HttpWebRequest POST Adds A NULL Value To Form Variables
Jan 10, 2011
I am attempting to call a RESTful service using an HttpWebRequest object via POST. I am attempting to pass 1 variable with the Request body which contains a url encoded string. I see the request when it hits the server; however, it shows 2 form variables. The first is Form[null] and the second is my variable.I am attempting to locate the source of this NULL key; however, I cannot. Any ideas on how I may be able to remedy this since it's throwing issues when I attempt to use it with the Nancy web framework for .Net.
Code:
var request = WebRequest.Create("http://localhost:8888/RouteName") as HttpWebRequest;
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";[code]...
I have a master page that loops through form keys looking for a specific key:
[Code]....
Problem, if I use an UpdatePanel on a page when this code is hit the last form key is null. If I don't use an update panel, all is good. Why does the UpdatePanel send a null form key in the list?
I am trying to simulate a POST to a form on an external server that does not require any authentication, and capture a sting containing the resulting page. This is what the form looks like:
I have an application that will upload files from my client to a web server using HttpWebRequest (with the function suggested here: [URL]
My problem is that when the file (about 10 mb in size) is being posted the whole application freezes (e.g. "application is not responding" when I try to move the window).
Do I need to put the uploading in a separate thread, or is there any other simple way solve this?
I'm trying to ping Google when my web site's sitemap is updated but I need to know which status code does Google or any other service returns. My code is below:
I have a php website with a login page containing username and password fields with the same exact html names. I would like to have a page in my ASP.NET page with a username and a password textbox field that sends the corresponding credentials to the php website using HttpWebRequest. How would I do that and how could I check the response to see if the authentication has been successful?
Just to test, I created a blank website and a blank web site project.
When I added a referece to web site by doing right click and add reference it added the dll inside a BIN folder but on ther other hand when I did the same for a web site project it created a reference folder for me and then added the dll under the reference folder.
I'm getting the "The underlying connection was closed: The connection was closed unexpectedly." error while trying to POST using the HttpWebRequest class on the production server, on my dev machine it works fine.
I originally tried using the WebClient class but I switched to the HttpWebRequest to try some of the suggestions I found while researching the issue (such as setting KeepAlive to false, PreAuthenticate true and ProtocolVersion to 1.0).
Since it's only happening on the production server, i'm guessing that it might have something to do with IIS.
Here's my code
[Code]....
If set the Target Framework (I used a new project for testing) to 2.0 (I didn't test every version of the framework) it works. I'm guessing that .net handles the security differently in .net 4.0.
Is there a way to force a non-secure form post to be secure? I understand there are ways to automatically resolve an http URL as an https URL but with form posts, is this type of redirection too late? Will the posted data have already gone through the wire as plain text?
I am trying to use HTTPWebRequest to login to a site and then retrieve the page after login. However, it seems as if I can't get past the login. I also investigated with Fiddler and tried mimicking Fiddler almost completely and still no luck.
I have a typical gridview/formview master control setup. When I try to update or insert I don't get any errors but it also doesn't work. When I try to insert data all I get are null values and when I update, none of the values are updated. The formview looks like its working, but just doesn't. The primary key is an identity and it auto-increments by one.
I know how to retrieve a GET object with Request.Querystring("objname"), but how do I receive POST variables using the Request object, or somehow through the code?
with a problem im having or at least give me an idea about which direction i should be going in.I have an asax file - with the following void Session_Start(object sender, EventArgs e)in that I am storing a session which holds a boolean.This boolean holds a flag which when set to true tells the application to go to the database and retrieve data, if its set to false, it checks the information in memory.I am using master pages and inside my master page i have and ascx files - which holds my navigation items(I build the navigation menu based on certain criteria)on a content page (a page that uses the master page) I perform a function when a button is clicked and I set the session flag to truethe problem is that the flag is not being checked until i refresh the page twice and therefore the menu is not updating until the user clicks to another page.my suspicion is that it is because of the page life cycle (the event handlers are done AFTER page load) - is there anyway around this?Is there any web page links you have got that I cant google? (yes i have googled but to little luck - maybe im using the wrong search term).on an additional note im trying to avoid like the plague - storing anything in the viewstate
I have an app which has a form that used to use AutoPostBack rigged controls (dropdowns, radiobuttons etc.) in an updatepanel, and I used to set session values on each postback. I posted the form using PostBackUrl to an external page, using a bit of javascript OnClientClick to copy my data into meaningfully named hidden fields.
Now, I've had to rewrite the AutoPostBack-ing controls so that all the cascading dropdown work and date calculation etc. is done in JavaScript, and not in C# - no more postbacks, no more updatepanel.
This means I've lost the ability to set my session values on postback. Can anyone think of a solution for setting these before I post my form? I need to set the session variables, plus post (querystrings are not an option) to the external page with the values from my form - and actually send the user to the external page, too.
I'm fairly new to MVC and admittedly don't fully understand how data is passed between Views and Controllers. That said, here is my issue.
I am working with C#. I have a page which has a list of items. Each item has a radio button set of three associated with it and there are 15 of these sets on the page. Thus I have radio1, radio2....radio15, etc. Each of these has value 0, 1, or 2 upon submit. I can't seem to understand how to get the information out of these radio button sets from the controller without passing 15 different variables to the post method in the controller which is associated with the view; ie passing Int32 radio1, Int32 radio2,.., Int32 radio15, etc.
I tried using ViewData["radio"+i] in a loop to access the value of each radio button set, but this, apparently can only be used to pass data to the View from the Controller and not the other way around.
I need to refresh my webpage in case of a change in the system time. However I see that my session variables are becoming null when the system time changes. So I cannot perform the refresh action since my webpage requests a login.I am not setting the Session variables to null explicitly anywhere in the code. I can't seem to figure out how they are becoming null.
Is it possible to postback to the server, perform a function, and then continue that postback on to an external place? (ie, to a payment system)(the scenario is clicking a button to place an order, mark it as sent, then send them off to the payment page (there are form variables that needs to be sent to the payment screen as well))
If I were using PHP I could submit a form to a new page, or the same page, and get the posted variables by doing something such as $_POST['txtVariable'], how do I do the same thing in ASP.NET? And is it possible to have more than one form per page?
