How can I return a variable from a $.getJSON function

Question

I want to return StudentId to use elsewhere outside of the scope of the $.getJSON()

j.getJSON(url, data, function(result)
         


        

Answer 1

hmm, if you've serialized an object with the StudentId property then I think that it will be:

var studentId;
function(json) {
    if (json.length > 0)
        studentId = json[0].StudentId;
}

But if you're just returning the StudentId itself maybe it's:

var studentId;
function(json) {
    if (json.length > 0)
        studentId = json[0];
}

Edit: Or maybe .length isn't even required (I've only returned generic collections in JSON).

Edit #2, this works, I just tested:

var studentId;
jQuery.getJSON(url, data, function(json) {
    if (json)
        studentId = json;
});

Edit #3, here's the actual JS I used:

$.ajax({
    type: "POST",
    url: pageName + "/GetStudentTest",
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    data: "{id: '" + someId + "'}",
    success: function(json) {
        alert(json);
    }
});

And in the aspx.vb:

 _
 _
Public Shared Function GetStudentTest(ByVal id As String) As Integer
    Return 42
End Function