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DropDownList with item check all


I want an element "check all" inside the dropdownlist items.

I've done this:

<ej:DropDownList ID="ddlGrupoOS" runat="server" SelectMethod="GetGruposOS" DataTextField="Nombre" DataValueField="ID" OnDataBinding="ddlEstadoOS_DataBinding" ></ej:DropDownList>


        function onCheckUncheckAll(args) {
            if (args.value == "0") {
                var sender = $('#<%=ddlGrupoOS.ClientID%>').data("ejDropDownList");
                if (args.isChecked)

Code Behind

public IEnumerable<GrupoOS> GetGruposOS()
            DMOperaciones db = new DMOperaciones();
            var result = db.GetGruposOS().OrderBy(x => x.ID).ToList();;
            result.Insert(0, new GrupoOS() { ID = 0, Nombre = "Check all" });
            return result;

I need this "property" in a lot of dropdown list. I think that it could be better done, but I don't know


1 Reply

KC Kasithangam C Syncfusion Team October 9, 2015 10:36 AM UTC

Hi Manolo,

Currently we don’t have inbuilt functionality for adding check all element in DropDownList items .You can add checkall element in your desire dropdownlist items after achieving this behavior. You could use the code that you have mentioned in your query. We have logged defect report for this. A support incident to track the status of this issue has been created under your account. Please log on to our support website to check for further updates.




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