Template-Driven Forms

The Grid provides options for editing its data by using the Template-Driven Angular Forms.

Basic Concepts

To implement the editing mode of the Kendo UI Grid for Angular in Template-Driven Forms, define the EditTemplateDirective for every Grid column.

Setup

The editing of the Grid in template-driven forms is based on the row index. As a result, the Template Forms immediately update the value.

To enable the editing mode of the Grid in Template-Driven Forms:

1. Wrap the component.

   Copy Code<form novalidate #myForm="ngForm">
       <kendo-grid>
           <!-- the rest of Grid configuration goes here -->
       </kendo-grid>
   </form>

2. Configure the columns editor template. Verify that each column of the Grid has a defined editor template.

   Copy Code<kendo-grid-column field="ProductName" title="Product Name">
       <ng-template kendoGridEditTemplate let-dataItem="dataItem">
           <input [(ngModel)]="dataItem.ProductName" name="ProductName" class="k-textbox" required/>
       </ng-template>
   </kendo-grid-column>

3. Configure the command column. You need to define the command buttons inside the CommandColumn template.

   Copy Code<kendo-grid-command-column title="command" width="220">
       <ng-template kendoGridCellTemplate let-isNew="isNew">
           <!-- edit the command directive, will be visible when not in edit mode -->
           <button kendoGridEditCommand [primary]="true">Edit</button>
           <!-- remove the command directive, will be visible when not in edit mode -->
           <button kendoGridRemoveCommand>Remove</button>
           <!-- save the command directive, will be visible when in edit mode -->
           <button kendoGridSaveCommand>{{ isNew ? 'Add' : 'Update' }}</button>
           <!-- cancel the command directive, will be visible when in edit mode -->
           <button kendoGridCancelCommand>{{ isNew ? 'Discard changes' : 'Cancel' }}</button>
       </ng-template>
   </kendo-grid-command-column>

4. Attach handlers for CRUD data operations.

   When a command button is clicked, the Grid emits the corresponding event. To instruct the component what action to perform, handle the event that is emitted.

   Copy Code<kendo-grid
     [data]="view | async"
     (edit)="editHandler($event)" (cancel)="cancelHandler($event)"
     (save)="saveHandler($event)" (remove)="removeHandler($event)"
     (add)="addHandler($event)"
   >
   <!-- the rest of configuration -->
   </kendo-grid>

Toggling the Edit State

Inside the corresponding event handlers, you can toggle the edit state of the Grid by using the:

• edit event
• add event
• cancel event
• save event
• remove event

Editing Records

The edit event fires when the kendoGridEditCommand is clicked. Inside the event handler, you can set the row to the editing mode by calling the editRow method.

Copy Codepublic editHandler({sender, rowIndex, dataItem}) {
    // close the previously edited item
    this.closeEditor(sender);

    // track the most recently edited row
    // it will be used in `closeEditor` for closing the previously edited row
    this.editedRowIndex = rowIndex;

    // clone the current - `[(ngModel)]` will modify the original item
    // use this copy to revert changes
    this.editedProduct = Object.assign({}, dataItem);

    // edit the row
    sender.editRow(rowIndex);
}

Adding Records

The add event fires when the kendoGridAddCommand is clicked. Inside the event handler, you can show the new row editor by calling the addRow method.

Copy Codepublic addHandler({sender}) {
    // close the previously edited item
    this.closeEditor(sender);

    // open a new item editor
    sender.addRow(new Product());
}

Cancelling Editing

The cancel event fires when the kendoGridCancelCommand is clicked. Inside the event handler, you can switch the row back to the view mode by calling the closeRow method.

Copy Codepublic cancelHandler({sender, rowIndex}) {
    // call the helper method
    this.closeEditor(sender, rowIndex);
}

private closeEditor(grid, rowIndex = this.editedRowIndex) {
    // close the editor
    grid.closeRow(rowIndex);

    // revert the data item to original state
    this.editService.resetItem(this.editedProduct, rowIndex);

    // reset the helpers
    this.editedRowIndex = undefined;
    this.editedProduct = undefined;
}

Saving Records

The save event fires when the kendoGridSaveCommand is clicked.

Copy Codepublic saveHandler({sender, rowIndex, dataItem, isNew}) {
    // update the data source
    this.editService.save(dataItem, isNew);

    // close the editor, that is, revert the row back into view mode
    sender.closeRow(rowIndex);
}

Removing Records

The remove event fires when the kendoGridRemoveCommand is clicked. Inside the event handler, you can issue a request to remove the current data item from the data source.

Copy Codepublic removeHandler({dataItem}) {
    // remove the current dataItem from the current data source
    // in this example, the dataItem is `editService`
    this.editService.remove(dataItem);
}

Suggested Links

• EditTemplateDirective
• API Reference of the GridComponent
• Overview of Editing
• Editing in Reactive Forms
• Built-In Editing Directives
• API Index of the Grid