Json problem with Page Method call on IE 8.

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I have the following code that populates a select element with values from an ajax call, via a Page Method. In FF, the code works perfectly, in IE8 I get the error: 'ResourceList[...].id' is null or not an object. What can I look at here?

C#

function readShift(jsonString) {
    var shiftInfo = Sys.Serialization.JavaScriptSerializer.deserialize(jsonString);
    var listItems = "";
    listItems += "<option value='0'>[Unassigned]</option>";
    for (var i = 0; i < shiftInfo.ResourceList.length; i++) {
        listItems += "<option value='" + shiftInfo.ResourceList[i].id + "'>" + shiftInfo.ResourceList[i].name + "</option>";
    }
    $("#" + resourceListId).html(listItems);
 };

Posted 3-May-10 1:23am

Brady Kelly

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Alexander Turlov · Answer 1 · 2010-05-10T04:56:00

First, you should debug you JavaScript in IE8 and see the structure of the shiftInfo. Than I presume you'll understand what's wrong.

However the first and may be more important thing to think about is why you perform JSON deserialization in JavaScript on the first place. If you utilize the Microsoft ASP.NET Ajax framework correctly you don't have to do that at all as in the callback method after you called your page method you should have your JavaScript object already deserialized. Since you call deserialize I'd start looking for a problem in the jsonString.

Also from the architectural point of view it seems like the problem starts in your C# code rather than in JavaScript.