Collapse all grouped rows at initial render

17 Feb 20221 minute to read

You can collapse all the grouped rows at initial rendering by using DataBound event with collapseAll method of the grid.

In the below demo, all the grouped rows are collapsed at initial rendering.

CSHTML

@Html.EJS().Grid("Grid").DataSource((IEnumerable<object>)ViewBag.dataSource).DataBound("bound").Columns(col =>
{
   col.Field("OrderID").HeaderText("Order ID").IsPrimaryKey(true).Width("120").TextAlign(Syncfusion.EJ2.Grids.TextAlign.Right).Add();
   col.Field("CustomerID").HeaderText("Customer Name").Width("150").Add();
   col.Field("Freight").HeaderText("Freight").Width("120").Format("C2").TextAlign(Syncfusion.EJ2.Grids.TextAlign.Right).Add();
   col.Field("ShipName").HeaderText("Ship Name").Width("150").Add();
   col.Field("ShipCountry").HeaderText("Ship Country").Width("150").EditType("dropdownedit").Add();

}).AllowPaging().AllowGrouping().GroupSettings(group => group.Columns(new string[] { "ShipCountry" })).Render()

<script>
    var initial = true;
    function bound() {
        if (initial === true) {
            this.groupModule.collapseAll();
            initial = false;
        }
    }
</script>

Collapseall.cs

public IActionResult Index()
{
    ViewBag.DataSource = OrderDetails.GetAllRecords();
    return View();
}