Develop Reference

Parameter Binding in ASP.NET Web API Decoding + (%2B) As Space

Given the following method in a controller for a ASP.NET Web API:
[HttpGet]
[ApiRoute("resource/{id}/end-point)]
public IHttpActionResult MethodName (int id, string clientTimeZone)
{
...
}
Whenever I submit a GET request to http://localhost:5684/api/v1/resource/1/end-point?client_timezone=%2B0500 clientTimezone is passed in to clientTimeZone as %2B0500 and it parses the encoded '+' sign into a space character. Why can't ASP.NET decode +'s from the URI?
In the header I have "ContentType = application/json" and a bearer token
I am trying to get "+0500" into my method but it is turning into " 0500"

Are you using Content-Type of application/x-www-form-urlencoded when consuming the api? This will treat a '+' character as a space when used in your URL.
More details here:
When to encode space to plus (+) or %20?
Try changing your Content-Type to application/json instead and see if parameter binding behaves as expected.

Weird return url

I am trying to use oauth2.
I make a get request, and then I get redirected at a callback url that I have set up before. The problem lies in the fact that the url parameters get preceded by the # sign and thus php, .net can't read them!
I get redirected in the following url in my browser:
http://localhost:1787/About.aspx?#access_token=f3EToovT2bQNNOQ&token_type=bearer&merchant_id=A6BGD4BH&response_type=token
Request.Params is empty, request.query string is empty. Even when I use php and print the $_REQUEST array still is empty!
How is this possible?

Whatever comes after the # doesn't mark as DATA being sent to the server, but a hash on the client side.
Try redirect using JavaScript only the hash:
window.location = window.location.pathname + '?' + window.location.hash.substring(1);

How to control colon (:) URL Query String?

I need to pass the Query String of ID in which colon (:) is included i.e. ABC_PD:123456.
When I am using this ID in query String session and when its redirect to another page in URL it give 404 no error found error on webpage.
So can any one provide the solution for this so that I can pass the colon in query string and when Page will be redirect without 404 error.
Solution would be much appreciated.

When you build the URL that you redirect to, you need to encode special characters by using the UrlEncode-method:
var redirectTo = "/mypage.aspx?id=" + HttpUtility.UrlEncode("id123:456");
This will create a query string that looks like this and will be interpreted correctly:
"/mypage.aspx?id=id123%3A456"

System.Net.WebRequest.Create and URL encoding

I have to make a call to an API and the URL hasd this format: http://apiurl.com/method/parameter1/parameter2
Now, parameter2 may contain characters that could mess with the URL such as forward slashes, so I URL encode parameter2:
string parameter2 = HttpUtility.UrlEncode("string with a / in it");
System.Net.WebRequest request = System.Net.WebRequest.Create(String.Format("http://apiurl.com/method/{0}/{1}", parameter1, parameter2));
The problem is that if I inspect the URL of the request, parameter2 is NOT URL encoded and the call fails (unsurprisingly). However, when I inspect the value of parameter2 it is correctly URL encoded with the forward slash replaced with %2f
I am using .NET 3.5 so many of the usual workarounds don't apply (genericUriParserOptions for example is .NET 4 and above only)
Thanks

Send POST request to asp.net mvc action via Fiddler

I have an ASP.NET MVC web site. One of my routes is a URL that takes 5 parameters. For the sake of illustration, these parameters are named parameter1, parameter2, parameter3, parameter4, and parameter5. Currently, I'm constructing a URL in some C# code that will POST to the mvc action via a WebClient. that code looks like this:
WebClient myWebClient = new WebClient();
myWebClient.UploadStringCompleted += myWebClient_UploadStringCompleted;
string url = "http://www.example.com/customer/" + parameter1 + "/orders/" + parameter2 + "/" + parameter3 + "/" + parameter4 + "/" + parameter5;
myWebClient.UploadStringAsync(new Uri(url, UriKind.Absolute));
I'm confident that the UploadString method does a POST. I need to do a POST, because my parameter values can be very long. In fact, I estimate that occasionally, the total url length may be 20000 characters long. Regardless, I get a 400 error when I attempt to post my data. In an effort to debug this, I'm trying to figure out how to simulate a POST in Fiddler.
Assuming that I am passing values via a query string as shown above, what values do I enter into Fiddler? From the Composer tab, I'm not sure what to enter for the Request Headers area. I'm also not entirely sure what to enter for the url. I'm not sure if I put the entire URL in there, including the parameter values, or if those belong in the Request Headers.
What I need to enter into Fiddler, so that I can debug my issue?

Basically all your parameters are a part of the URL, and this is the root of your problem. Here is what is going on: you are hitting the URL length limitation, and receiving a "400 Bad request" error. In real world most web browsers do not work with URLs more than 2000 characters long.
To resolve this problem I would suggest doing a bit of refactoring, so that request is posted to the URL http://www.example.com/customer/parameter1/orders or even http://www.example.com/customer/orders with parameters send in request body. Here is how test such request in Fiddler:
On Composer tab choose POST request verb
Specify the URL as
http://www.example.com/customer/parameter1/orders
or
http://www.example.com/customer/orders
In Request Headers section you can set content type header like
Content-Type: application/x-www-form-urlencoded
or any other header you might require. Or just leave it blank which will work in your case.
Finally in Request Body field list your parameters in query string form
parameter1name=parameter1value&parameter2name=parameter2value
In this new case here is how you can send such a request using WebClient:
WebClient myWebClient = new WebClient();
myWebClient.UploadStringCompleted += myWebClient_UploadStringCompleted;
string url = "http://www.example.com/customer/orders";
string data = "parameter1name=parameter1value&parameter2name=parameter2value";
myWebClient.UploadStringAsync(new Uri(url, UriKind.Absolute), data);

I simply mimic the exact request that was sent.
This is how I do it:
Open Fiddler
Go to the page that I want to re-issue the command i.e. repeat the bug step but watch for the request in the list
Select it from the list and right-click, go to replay > reissue and edit
This build a replicated request but hits a break point before it is sent (You will see the red bar on the right)
Above this you can edit the values that were sent by double-clicking on any of them in Headers, QueryString etc
Then hit Run to Complete