How to pass a Datakey values into parameters in telerik grid

See more:

Telerik

MVC3

HI I need to pass my datakey value into parameter of .Ajax.Delete() here is my Code can anyone help me to get out of this problem

@(Html.Telerik().Grid(Model)
.Name("Grid")
.DataKeys(keys =>
    {
        keys.Add(o => o.Authorid);
    })

.DataBinding(databinding =>
            {

                databinding.Ajax()
               .Delete("_DELETEBatchEditing", "ExGrid" ,new { mainId = Model.Key }) );

I tried the above code but it did not pass the datakey value into my parameter