detailExpand

Fired when the user expands a detail table row.

The event handler function context (available via the this keyword) will be set to the widget instance.

Event Data

e.detailRow jQuery

The jQuery object which represents the detail table row.

e.masterRow jQuery

The jQuery object which represents the master table row.

e.sender kendo.ui.Grid

The widget instance which fired the event.

Example - subscribe to the "detailExpand" event during initialization

<div id="grid"></div>
<script>
let encode = kendo.htmlEncode;
$("#grid").kendoGrid({
  columns: [
    { field: "name" },
    { field: "age" }
  ],
  dataSource: [
    { name: "Jane Doe", age: 30 },
    { name: "John Doe", age: 33 }
  ],
  detailTemplate: ({ name, age }) => `<div>Name: ${encode(name)}</div><div>Age: ${encode(age)}</div>`,
  detailExpand: function(e) {
/* The result can be observed in the DevTools(F12) console of the browser. */
    console.log(e.masterRow, e.detailRow);
  }
});
</script>

Example - get the data items of the expanded master and detail rows

<div id="grid"></div>
<script>
  $("#grid").kendoGrid({
    dataSource: {
      data: [
        { EmployeeID: 1, FirstName: "Nancy", LastName: "Davolio", Country: "USA"},
        { EmployeeID: 2, FirstName: "Andrew", LastName: "Fuller", Country: "USA"},
        { EmployeeID: 3, FirstName: "Janet", LastName: "Leverling", Country: "Germany"}
      ]
    },
    pageable: true,
    detailInit: detailInit,
    dataBound: function() {
      this.expandRow(this.tbody.find("tr.k-master-row").first());
    },
    columns: [
      {
        field: "FirstName",
        title: "First Name",
        width: "110px"
      },
      {
        field: "LastName",
        title: "Last Name",
        width: "110px"
      },
      {
        field: "Country",
        width: "110px"
      }
    ],
    detailExpand: function(e) {
      /* The result can be observed in the DevTools(F12) console of the browser. */
      var masterDataItem = e.sender.dataItem(e.masterRow);
      // get detail Grid data
      //var detailDataItems = e.detailRow.find(".k-grid").data("kendoGrid").dataSource.data();

      //get detail grid data items using dataItem()
      var detailGridRows = e.detailRow.find(".k-master-row");
      var detailGrid = e.detailRow.find(".k-grid").data("kendoGrid");
      var detailDataItems = [];
      detailGridRows.each(function(idx, row){
        detailDataItems.push(detailGrid.dataItem(row))
      });

      console.log("master row dataItem", masterDataItem);
      console.log("detail row dataItem", detailDataItems);
    }
  });

  function detailInit(e) {
    $("<div/>").appendTo(e.detailCell).kendoGrid({
      dataSource: {
        data: [
          {EmployeeID: 1, OrderID: 10258, ShipCountry: "Austria" },
          {EmployeeID: 2, OrderID: 10558, ShipCountry: "Spain" },
          {EmployeeID: 1, OrderID: 10256, ShipCountry: "France" },
          {EmployeeID: 3, OrderID: 11005, ShipCountry: "Spain" }
        ],
        filter: { field: "EmployeeID", operator: "eq", value: e.data.EmployeeID }
      },
      pageable: true,
      columns: [
        { field: "OrderID", width: "110px" },
        { field: "ShipCountry", title:"Ship Country", width: "110px" }
      ]
    });
  }
</script>

Example - subscribe to the "detailExpand" event after initialization

<div id="grid"></div>
<script>
let encode = kendo.htmlEncode;
function grid_detailExpand(e) {
/* The result can be observed in the DevTools(F12) console of the browser. */
  console.log(e.masterRow, e.detailRow);
}
$("#grid").kendoGrid({
  columns: [
    { field: "name" },
    { field: "age" }
  ],
  dataSource: [
    { name: "Jane Doe", age: 30 },
    { name: "John Doe", age: 33 }
  ],
  detailTemplate: ({ name, age }) => `<div>Name: ${encode(name)}</div><div>Age: ${encode(age)}</div>`
});
var grid = $("#grid").data("kendoGrid");
grid.bind("detailExpand", grid_detailExpand);
</script>