JavaScript/jQuery Form - Update Form Data Using the API

If you need to update form data at runtime, redefine the formData object. In this case, form item values are updated automatically and the UI component is rerendered from scratch. In the following example, the SelectBox UI component changes the formData object.

JavaScript
  • var employees = [{
  • name: "John Heart",
  • position: "CEO",
  • officeNo: "901"
  • }, {
  • name: "Bill Silver",
  • position: "HR Manager",
  • officeNo: "905"
  • }];
  •  
  • $(function() {
  • var form = $("#formContainer").dxForm({
  • formData: employees[0]
  • }).dxForm("instance");
  •  
  • $("#employeeSelector").dxSelectBox({
  • displayExpr: "name",
  • dataSource: employees,
  • value: employees[0],
  • onValueChanged: function(data) {
  • form.option("formData", data.value);
  • }
  • });
  • });

View Demo

The Form UI component provides methods that update specific formData fields and rerender the corresponding editors without rerendering the whole UI component. The updateData(dataField, value) method updates the value of a single field. The updateData(data) method updates values of several fields at once. In the following code, these methods are called on a Button click.

JavaScript
  • $(function() {
  • var form = $("#formContainer").dxForm({
  • formData: {
  • firstName: "Joe",
  • lastName: "Heart",
  • phone: "+1(213) 555-9392"
  • }
  • }).dxForm("instance");
  •  
  • $("#updatePhone").dxButton({
  • text: 'Update the Phone Number',
  • onClick: function () {
  • form.updateData("phone", "+1(333) 888-7698");
  • }
  • });
  •  
  • $("#updateName").dxButton({
  • text: 'Update the Name',
  • onClick: function () {
  • form.updateData({
  • firstName: "John",
  • lastName: "Doe"
  • });
  • }
  • });
  • });
See Also