Question

I am using the jQuery .change() method to execute a function when my dropdown is changed. However when i try to do this i get an error that says

Microsoft JScript runtime error: ‘this.ui.dropdownPhase’ is null or not an object

I have tryed using e to help get the control but I was unsuccesful, the dropdownPhase control is being used in a repeater so it is important for me to know exactly which one was changed.

Even if i cant pass the exact control I would at least need to know which row.

this.ui.dropdownPhase.change(function(e) {
    var x2 = this.ui.dropdownrPhase;                        
});

Answer 1

Inside the change() callback, the this is set to the current DOM element. It may not be the same as the this you were referring to previously.

To avoid this issue, store a reference to the outer this in a variable with another name:

var me = this;    
me.ui.dropdownPhase.change(function(e) {
    var x2 = me.ui.dropdownPhase;
});