mobilecontrols-devexpress-dot-xamarinforms-dot-datagrid-dot-datagridview-975e64e7.md
Occurs when a user double taps the grid.
Namespace : DevExpress.XamarinForms.DataGrid
Assembly : DevExpress.XamarinForms.Grid.dll
NuGet Package : DevExpress.XamarinForms.Grid
public event DataGridGestureEventHandler DoubleTap
The DoubleTap event's data class is DataGridGestureEventArgs. The following properties provide information specific to this event:
| Property | Description |
|---|---|
| Element | Gets the value that specifies the grid element with which a user interacts. |
| FieldName | Gets the field name of the column. |
| Item | Gets an object that specifies a data source’s item to which the grid’s data row corresponds. |
| RowHandle | Gets the grid’s row handle. Inherited from RowEventArgs. |
The DataGridView raises the following events in response to user gestures:
|
Gesture
|
Event
| | --- | --- | |
Tap
|
Tap and TapConfirmed
| |
Double Tap
|
Tap and DoubleTap
| |
LongPress
|
|
The event parameter’s Element property allows you to obtain the element that was tapped.
If a user interacts with a data row, the Item property returns the data source’s item object to which that row corresponds. To obtain the tapped row handle, use the RowHandle property. If a user double taps a data row that is not selected, the DataGridView.SelectionChanged event is also raised.
This example shows how to create a custom view for the grid’s edit form and set up the grid to invoke this form when a user double taps a cell.
The grid is bound to a collection of Employee objects and contains columns to display employee information (photo, name, position, phone, address, hire and birth dates, access level, and information about vacation). A custom edit form will display an employee’s photo and name, and contain editors to modify employee’s phone and address.
Custom Edit Form
Grid Columns
Follow the steps below to implement a custom edit form.
Define a data template to be a content for the edit form page. In this example, it is a Xamarin.Forms.Grid with a set of labels and editors inside. Its BindingContext is an EditRowViewModel object. Use its Item property to access an object that represents a data source’s record (Employee) and bind editors to its properties.
In the grid’s DoubleTap event handler, create an EditFormPage instance and pass the specified data template to its constructor as a third parameter.
In the App.xaml.cs file, assign a NavigationPage instance to the Application.MainPage property and add the MainPage content page to the navigation stack (the application’s root page):
See Also