DataManager doesn't send take and skip in my DropDownList control

Question

Hello, var customerList = ej.DataManager({ url: "Administration/GetGroups", crossDomain: true });
        $(function () {
            obj = $('#groupCodeList').ejDropDownList({
                dataSource: customerList,
                fields: { text: "ContactName", value: 'ContactName' },
                itemsCount: 20,
                popupHeight: "200px",
                width: "250px",
                enableFilterSearch: true,
                enableServerFiltering: true,
                allowVirtualScrolling: true,
                search: function (args) {
                    if (args.searchString.length < 3) { //check search string length
                        args.cancel = true;
                    }
                }
            }).data("ejDropDownList");
            obj._updateSelectedIndexByValue = function () { }
        });

And my C# controller: 
  public IActionResult GetGroups(ExtendedDataManagerRequest dm)
        {
            return null;
        }

In the console browser call I see:  Why don't I have the take and skip?I also took the opportunity to ask, how do I add the extra parameter that I want to send in javascript?

Deepak Ramakrishnan · Accepted Answer

Hi Fernando,Greetings from Syncfusion support.Query 1 : Why don't I have the take and skip?

For the above requirement we suggest you to set Take (top) parameter
to the filter query , which will get the required number of items from the server
.For more details , kindly refer to the below documentation.

https://ej2.syncfusion.com/aspnetcore/documentation/drop-down-list/filtering#limit-the-minimum-filter-character

Query 2: how do I add the extra parameter that I want to send in javascript?

Yes we can send additional parameter to the server as like below code , Also
refer to the attached documentation below for more details about it.

https://ej2.syncfusion.com/javascript/documentation/data/how-to/#sending-additional-parameters-to-server

Thanks,Deepak R.