Introduction to the jQWidgets jqxGrid cellbeginedit Event

The jQWidgets jqxGrid cellbeginedit event is a powerful feature that allows programmers to trigger code when a cell in the jqxGrid is being edited. This event is fired when a cell enters the edit mode, allowing you to handle the data before it is changed and validate the data before it is committed to the underlying data source.

Why use the cellbeginedit event?

The cellbeginedit event is useful when you need to perform certain actions when a cell in the jqxGrid is being edited. For example, you may need to validate the data entered by the user, or you may need to update some other cells in the grid when a cell is edited. By using this event, you can ensure that your code is executed at the right time, and you can prevent users from entering invalid data into the grid.

How to use the cellbeginedit event?

To use the cellbeginedit event in your application, you first need to create a jqxGrid instance and set the event handler function. The event handler function will be called when the cellbeginedit event is fired.

Here is an example of how to use the cellbeginedit event in practice:

// Create a jqxGrid instance
$('#jqxgrid').jqxGrid({
    columns: [
        { text: 'ID', datafield: 'id', width: '100px' },
        { text: 'Name', datafield: 'name', width: '200px' },
        { text: 'Email', datafield: 'email', width: '250px' },
        { text: 'Phone', datafield: 'phone', width: '150px' },
        { text: 'Address', datafield: 'address', width: '300px' }
    ],
    source: dataAdapter,
    editable: true,
    selectionmode: 'single',
    editmode: 'click'
});

// Set the cellbeginedit event handler function
$('#jqxgrid').on('cellbeginedit', function (event) {
    // Handle the event here
});

In the event handler function, you can access the row and column index of the cell being edited, as well as the new and old values of the cell. This allows you to validate the data entered by the user and prevent invalid data from being committed to the data source.

Here is an example of how to access the row and column index, as well as the new and old values of the cell:

// Set the cellbeginedit event handler function
$('#jqxgrid').on('cellbeginedit', function (event) {
    // Get the row and column indexes
    var rowIndex = event.args.rowindex;
    var columnIndex = event.args.columnindex;

    // Get the new and old values of the cell
    var newValue = event.args.newvalue;
    var oldValue = event.args.oldvalue;

    // Validate the data entered by the user
    if (!newValue) {
        // Display an error message and prevent the cell from being edited
        alert('Please enter a value for this cell');
        event.args.cancel = true;
    }
});

Conclusion

The jQWidgets jqxGrid cellbeginedit event is an essential feature for any developer who needs to handle the editing of cells in a jqxGrid. By using this event, you can ensure that your code is executed at the right time, validate the data entered by the user, and prevent invalid data from being committed to the data source.