I have a .NET webmethod that I have called from jQuery. The method returns some HTML markup that I display within a DIV element.
Once I have the response I use
$("#div").html(result.d);
My question is, what does the .d do? I don't like using code I don't fully understand? Could I get the same result using Eval?
Are you referring to the ADO.NET Data Services?
I remember hearing a presentation about the JSON returning this and I think its just a wrapper to ensure the payload is a JSON object as opposed to an array (which is the case of returning multiple entities).
Why 'd' specifically? I think I remember them saying something like 'well it had to be something'.
It returns the value of the field named 'd' in the object 'result'.
This question shows an example of how the JSON might look, notice the d: field.
The d is part of the result returned by your .NET code. If you look at this code you should see a variable being set with the name d. If it is generated from serialized classes, then it probably sends along a member of that class with the name d.
As others have pointed out, it returns the "d" member of the "result" object.
If you wanted to have "d" in a variable you could use this:
var property = "d";
var value = result[property];
Once, my friend told me that "d" represent "data" from response that ajax get in return(because response can contain a lot more than just simple data).
Maybe it is, maybe it isn't but still you can accept it like it is. :)