Template Field in Grid column

[Mona]

I want to add checkbox in the grid column, for that i am using .Template(" Check box code")

same as below example,

columns.Template(@<text>
                     <input name="selectedProducts" type="checkbox" title="select product" value="@item.ProductID" 
                     @{
                         if (@item.ProductID)
                         {
                            @("checked=checked")
                         }
                     }/>
                    </text>)

But i am getting this value as undefined.

Any ideas will be appreciated for the same.

Thanks in advance!!