How to call HttpHandler from .cs file asp.net

Question

I have created a http handler fro my Jquery ajax call. which is working fine the jquery call is mentioned below

 $.ajax({
    url: "Services/name.ashx",
    contentType: "text/plain",
    data: {
        CustMobile: a,
        CustName: b,
        CustEmail: c
    },
    contentType: "application/json; charset=utf-8",
    success: function (data) {
        $("#loading").hide();
    },
    error: function () {
        $("#loading").hide();
    }
});

Now my problem is this can I call the name.ashx handler through my code behind. I am using asp.net with C#. I know that it can be called by Response.write("") writing the whole script part. Ans also Register Script of page method.
But Is there any way by which I can send request to handler and get back response from the handler using c#.

Thanks.

I have found the similar question whose link is below http://stackoverflow.com/questions/6865025/server-transfer-to-an-httphandler — शेखर, Jul 18 '12 at 06:56
But there too it takes context as parameter and also how i will get the response I don't know. Please help — शेखर, Jul 18 '12 at 06:59

score 22 · Accepted Answer · edited Jun 20 '20 at 09:12

22

You can call any http resource from code behind using HttpWebRequest (System.Net namespace)

Sample

HttpWebRequest request = (HttpWebRequest) WebRequest.Create("<YourDomain>/Services/name.ashx?CustMobile=ValueOfA&CustName=ValueOfB&CustEmail=ValueOfC");
HttpWebResponse response = (HttpWebResponse)request.GetResponse();

You need an absolute path but you can get your domain or server url from the HttpContext if you dont want to hardcode the domain

More Information

MSDN - HttpWebRequest Class

edited Jun 20 '20 at 09:12

Community

1
1

answered Jul 18 '12 at 06:56

dknaack

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202

I have a small question do I have to put the absolute path or relative path will work. Since it (handler) is a part of my application. – शेखर Jul 18 '12 at 07:02
You need an absolute path. You can get your domain or server url from the HttpContext if you dont want to hardcode the domain. – dknaack Jul 18 '12 at 07:03
(HttpWebResponse)request.GetRequestStream(); not able to cast it in response. – शेखर Jul 18 '12 at 07:17
Use (HttpWebResponse)request.GetResponse(); to get the respose. – MJ Fathinia Jul 18 '12 at 07:29
I am getting an error The remote server returned an error: (400) Bad Request. My http handler is also implementing IRequiresSessionState. Since I have to do some session stuff over there. I this can be a problem. – शेखर Jul 18 '12 at 09:03
Yes, if you have a session you have to maintain this. Depends on your session handling. – dknaack Jul 18 '12 at 09:10
1

thanks @dknaack I did not solved my problem due to some complex use of session but I was able to access that handler form your suggested way. The only problem was session. – शेखर Jul 18 '12 at 10:21
How can I send JSON data using this technique? – Aishwarya Shiva Apr 18 '14 at 15:33

score 6 · Answer 2 · edited May 23 '17 at 11:45

I found another way of doing this. If you want to access it from the same project it's is very easy.

Steps to use it in code behind

Basically it create a class with a class name.
You can create a object of that class.
Then you can call ProcessRequest.
It will execute that handler.

Suppose I have created a handler as follows

public class HandlerName : IHttpHandler
{
    public void ProcessRequest(HttpContext context)
    {
       //some code
    }
    public bool IsReusable
    {
        get
        {
            return false;
        }
    }
}

So you can use it as follows

HandlerName obj=new HandlerName();
obj.ProcessRequest(HttpContext);

Note that you can get the current context and you need to pass it in the process request. More about HttpContext^[1^2]

Edit 1

You can also overload the ProcessRequest method in case if you need to do this.

public class HandlerName : IHttpHandler
{
    public void ProcessRequest(HttpContext context)
    {
      // some code
    }
    public void ProcessRequest(HttpContext context, string someString)
    {
       // do your coding here
    }
    public bool IsReusable
    {
        get
        {
            return false;
        }
    }
}

If you don't want to override the method the you can pass the values as follow
You can add the value in the HttpContext.Current.Items

HttpContext.Current.Items["ModuleInfo"] = "Custom Module Info"

and get it as follow in the ProcessRequest Method

public class HandlerName : IHttpHandler
{
    public void ProcessRequest(HttpContext context)
    {
      string contextData = (string)(HttpContext.Current.Items["ModuleInfo"]);
    }
    public bool IsReusable
    {
        get
        {
            return false;
        }
    }
}

How to call HttpHandler from .cs file asp.net

2 Answers2

Sample

More Information

Edit 1

Linked