I've made a unique object that I want to send back in JSON format to a JavaScript function. This special object was developed as a class in C#.
What would be the most effective approach to return this object from a PageMethod (or [WebMethod]) to a JavaScript function called onPageMethodCallback()? My goal is to access the properties of this object in JavaScript and modify the DOM accordingly, possibly leveraging jQuery.
Many thanks, StackOverflow! :)
When using ASP.NET AJAX on the server side, serialization of objects is handled for you. Here's an example:
public class Name
{
public string FirstName;
public string LastName;
}
[WebMethod]
public Name GetName()
{
Name name = new Name();
name.FirstName = "Dave";
name.LastName = "Ward";
return name;
}
You can then make a direct call to the PageMethod from jQuery using a method similar to what JD linked to. For more details, check out this post on calling PageMethods with jQuery.
The returned JSON will allow you to access the properties of the Name class as expected. For instance, you can use msg.d.FirstName and msg.d.LastName in this case.
Just be aware of the .d., which was introduced as a security measure in 3.5. More information about this change can be found here if you are working with version 2.0.
Check out this in-depth post about utilizing JSON serialized WebMethods from an asmx with jQuery. It's a valuable resource.
If you prefer using ASP.NET AJAX for the AJAX functionality, consider exploring the ScriptManager and ServiceReference tools that generate a javascript proxy. It's a powerful tool that has been successfully utilized in large applications. Here is an informative article on the topic:
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