Display foreign key values in treegrid in EJ2 JavaScript Treegrid control
27 Apr 20236 minutes to read
Since Tree Grid Databinding concept is of hierarchy relationship, we do not provide in-built support for foreignKey datasource.
To display the foreignKey value at initial rendering, we can use the queryCellInfo
event of the Tree Grid and also by using the editType
and columns.edit
properties of Tree Grid Column, we can render Dropdownlist with external or foreign dataSource.
ej.treegrid.TreeGrid.Inject(ej.treegrid.Edit,ej.treegrid.Toolbar);
var treegrid = new ej.treegrid.TreeGrid({
dataSource: window.textdata,
childMapping: "Children",
treeColumnIndex: 1,
height: 269,
editSettings: {
allowEditing: true,
allowAdding: true,
allowDeleting: true,
mode: "Cell"
},
toolbar: ["Add", "Delete", "Update", "Cancel"],
treeColumnIndex: 1,
queryCellInfo: queryCellInfo,
columns: [
{ field: "EmpID", headerText: "EmpID", isPrimaryKey: true, textAlign: "Right", width: 80 },
{ field: "Name", headerText: "Employee Name", width: 70 },
{ field: "DOB", headerText: "DOB", textAlign: "Right", width: 70, editType: "datepickeredit",
format: { skeleton: "yMd", type: "date" } },
{ field: "EmployeeID", headerText: "EmployeeID", textAlign: "Right", editType: "dropdownedit",
edit: {
params: {
dataSource: new ej.data.DataManager(window.dropData),
fields: { text: "EmployeeName", value: "EmployeeID" },
query: new ej.data.Query()
}
},
width: 70 },
{ field: "Country", headerText: "Country", width: 90, textAlign: "Right" }
]
});
treegrid.appendTo("#TreeGrid");
function queryCellInfo(args) {
if (args.column.field === "EmployeeID") {
for (var i = 0; i < dropData.length; i++) {
let data = args.data;
if (data[args.column.field] === dropData[i]["EmployeeID"]) {
args.cell.innerText = dropData[i]["EmployeeName"]; // assign the foreignkey field value to the innertext
}
}
}
}
<!DOCTYPE html><html lang="en"><head>
<title>EJ2 Grid</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="Typescript Grid Control">
<meta name="author" content="Syncfusion">
<link href="index.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/23.1.36/ej2-base/styles/material.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/23.1.36/ej2-grids/styles/material.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/23.1.36/ej2-treegrid/styles/material.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/23.1.36/ej2-buttons/styles/material.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/23.1.36/ej2-popups/styles/material.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/23.1.36/ej2-navigations/styles/material.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/23.1.36/ej2-dropdowns/styles/material.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/23.1.36/ej2-lists/styles/material.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/23.1.36/ej2-inputs/styles/material.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/23.1.36/ej2-calendars/styles/material.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/23.1.36/ej2-splitbuttons/styles/material.css" rel="stylesheet">
<script src="https://cdn.syncfusion.com/ej2/23.1.36/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
<div id="container">
<div id="TreeGrid"></div>
</div>
<script>
var ele = document.getElementById('container');
if(ele) {
ele.style.visibility = "visible";
}
</script>
<script src="index.js" type="text/javascript"></script>
</body></html>
You can refer to our
JavaScript Tree Grid
feature tour page for its groundbreaking feature representations. You can also explore our JavaScript Tree Grid exampleJavaScript Tree Grid example
to knows how to present and manipulate data.