Target column with class name not working as expected

hsobhy

I have a datatable working with an ASP.NET GridView perfectly. For some reason I have to define a specific column that include checkboxes. When I define it using the index it works fine but I need to make it more flexible with defining it using a class name where it actually work fine but generate error (mdata not defined) when delete all rows while not if this column defined using index.

This works fine:

            "columnDefs": [
                { "targets": 0, "bSortable": true },
                { "targets": 2, "bSortable": true },
                { "targets": 3, "bSortable": true },
                { "targets": 5, "bSortable": true },
                { "targets": 8, "bSortable": false }, // checkboxes column
                { "targets": '_all', "bSortable": false }

            ],

This is not working the same:

            "columnDefs": [
                { "targets": 0, "bSortable": true },
                { "targets": 2, "bSortable": true },
                { "targets": 3, "bSortable": true },
                { "targets": 5, "bSortable": true },
                { "targets": 'chkAll', "bSortable": false }, // checkboxes column
                { "targets": '_all', "bSortable": false }

            ],

I've also tried

            "columnDefs": [
                { "targets": 0, "bSortable": true },
                { "targets": 2, "bSortable": true },
                { "targets": 3, "bSortable": true },
                { "targets": 5, "bSortable": true }

            ],
            "aoColumnDefs": [
                { 
                    "bSortable": true, 
                    "aTargets": [ -1 ] // checkboxes column
                } 
            ],

I also tried to not define that column since I do't need to but actually the error only disappear when defining it. Any idea why it's not effected when select all checkboxes and delete rows in second case?

Note: I use GridView, UpdatePanel and all works fine in all events.

Thank you,