Multiples dropdownlist with check all

[Manolo]

Hi,

In this article, you explain how set a check all in drop down list.

https://help.syncfusion.com/aspnetmvc/dropdownlist/howto

But I've a lot of drop down with this capabilities. I don't like define the same function for check or uncheck for each drop down.

The code

function create(args) {
            $("#check").ejCheckBox({ text: "Check All", change: "onallChange" });
        }
        function onallChange(args) {
            window.flag = true;
            var obj = $("#DropDownList1").ejDropDownList("instance");
            if (args.isChecked) obj.checkAll();
            else obj.uncheckAll();
            window.flag = false;
        }

How can I pass at function "onallChange" the drop down owner as parameter. Thus, this function can be generic.

Alternative solutions are welcome also

Thanks!

[Karthikeyan Viswanathan]

Hi Manolo, 

 Thanks for Contacting Syncfusion Support. 

You can add generic check all option in dropdownlist by using below code snippet: 

<code> 

function create(args) { 

        $(".e-dropdownlist.check").ejCheckBox({ text: "Check All", change: "onallChange" }); 

    } 

    function onallChange(args) { 

        window.flag = true; 

        var obj = $("#" + this.element.parents(".e-ddl-popup").attr("id").replace("_popup_list_wrapper", "")).ejDropDownList("instance"); 

        if (args.isChecked) obj.checkAll(); 

        else obj.uncheckAll(); 

        window.flag = false; 

    } 

</code> 

Please find the sample link: http://www.syncfusion.com/downloads/support/forum/128050/ze/Dropdownlistcheckallheadertemplate-1819133375.zip  

Regards, 

Karthikeyan v. 

[Manolo]

Hi,

Your code works perfectly, thanks, but I've other problem.

If I set all dropdowns in a form, if I set this definition in the controller

        [HttpPost]
        public JsonResult Filtrar(string ddlComunidad, string ddlProvincia, ddlSituacionMunicipio)
        {
            var datos = GetNNPP(ddlComunidad, ddlProvincia, ddlSituacionMunicipio)ToList();
            return Json(datos);
        }

I only get the first value cheked, not all values.

[Karthikeyan Viswanathan]

Hi Manolo,  

 

 You can’t get the collection of selected items with in string argument otherwise you can get the items in list of string. You can get all checked items in dropdownlist by using below code snippet:  

 

<code>  

[HttpPost] 

        public JsonResult Filtrar(List<string> ddlComunidad, List<string> ddlProvincia) 

        { 

   

            return Json(ddlComunidad,JsonRequestBehavior.AllowGet); 

        } 

</code>  

 

Please find the sample link: http://www.syncfusion.com/downloads/support/forum/128050/ze/Dropdownlistcheckallitem232801711.zip  

Regards,  

Karthikeyan v.