datasource object not ready in ajax OnSuccess call?

[John]

Hi,

I met a strange issue.

In DOM load, I create a kendo grid with remote data source:

$(document).ready(function () {

    LocationGridDataSource = new kendo.data.DataSource({ type: "json" ...);

    LocationGrid = ...

}

There is an ajax form in my page:

@using (Ajax.BeginForm("Bind", "Test", null, new AjaxOptions { OnSuccess = "BindOnSuccess" }, new { id = "BindForm" }))

{}

I use $("#BindForm").submit() to mannually submit the ajax form.
In BindOnSuccess, I use datasource.get:

function BindOnSuccess(context){

    ....

    var location = LocationGridDataSource.get(context.id);

    var selection = LocationGrid.table.find('tr[data-uid="' + location.uid + '"]');

    ....

}

Sometimes location which is got from LocationGridDataSource.get(context.id) is NULL, sometimes it will get object successfully.

After my debugging, my questions:
1. The problem is caused by LocationGridDataSource is not ready after ajax returns?
2. Is there a mechanism to ensure I can call LocationGridDataSource.get() based on a READY datasource object?

Any comments or instruction?

Thanks.

[John]

anyone knows this?