MVC :: Creating A Custom Actionresult In 2 To Generate JSONP
Jan 3, 2011
i have a need to generate JSONP using MVC 2 for a 3rd party App...It seems there is no actionresult for this OOTB in MVC 2 so i need to create a custom one..i found the following article on such here; [URL] My first question is...Where do i put the custom actionresult code? Secondly...How can i use this to new JSONP actionresult to return data from my data model? Currently , my current JSON actionresult (remember..i need JSONP) looks like this;
[Code]....
How can i use the new JSONP Actionresult to return db.GetTopGainers()?
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[Code]....
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[Code]....
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[Code]....
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EDIT: At first I thought it wasn't working cross domain at all, now I realize it only works in IE. I'm using jQuery to call a web service (ASP.NET .axmx), and trying to us jsonp so that I can call it across different sites. Right now it is working ONLY in IE, but not in Firefox, Chrome, Safari. Also, in IE, a dialog pops up warning "This page is accessing information that is not under its control..."
$.ajax({
type: "POST",
[URL],
dataType: "jsonp",
success: function(data) {
alert(data.prop1);
},
error: function(XMLHttpRequest, textStatus, errorThrown) {
alert(XMLHttpRequest.status + " " + textStatus + " " + errorThrown);
}
});
And the server code is:
[ScriptService]
public class TestService : System.Web.Services.WebService{
[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public void HelloWorld() {
string jsoncallback = HttpContext.Current.Request["jsonp"];
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HttpContext.Current.Response.Write(response);
}
}
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UPDATE:
The service cannot be activated because it does not support ASP.NET compatibility. ASP.NET compatibility is enabled for this application. Turn off ASP.NET compatibility mode in the web.config or add the AspNetCompatibilityRequirements attribute to the service type with RequirementsMode setting as 'Allowed' or 'Required'.
when i try to access wcf service i get this error: the reason is HttpContext.Current is null, what should i do in this case?
Object reference not set to an instance of an object.
System.Web.Script.Serialization.JavaScriptSerializer s = new System.Web.Script.Serialization.JavaScriptSerializer();
Person p = new Person() { FirstName = "First name", LastName= "last name" };
string json = s.Serialize(p);
System.Web.HttpContext.Current.Response.Write("jsoncallback" + json);} //error
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using System.Web;
using System.Web.Script.Services;
using System.Web.Services;
using System.Web.Script.Serialization;..........
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Edit
I have tried what you said, citronas and here's what I've come up with:
[Code]....
Unfortunately nothing actually happens...am I missing something?
Edit -- Fixed
I was missing something! I had CommandName equal to my method name instead of OnCommand. I took out CommandName, kept the argument bit and replaced CommandName with OnCommand. Everything works now, but what would I ever need CommandName for?
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[Code]....
In my View, I am using it like this:
[Code]....
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