DataFormView.ValidationMode Property

Specifies when to validate values that users enter in the data form’s editors.

Namespace: DevExpress.XamarinForms.DataForm

Assembly: DevExpress.XamarinForms.Editors.dll

NuGet Package: DevExpress.XamarinForms.Editors

Declaration

public CommitMode ValidationMode { get; set; }

Property Value

Type	Description
CommitMode	A value that specifies when input values are validated.

Available values:

Name	Description
Manually	A value is validated or committed when the Validate or Commit method is called, respectively.
LostFocus	A value is validated or committed when the editor loses focus.
PropertyChanged	A value is validated or committed after changes.

Remarks

The ValidationMode property specifies when the data form validates the user input. The following modes are supported:

• LostFocus—the form validates a data field when an editor loses focus.
• PropertyChanged—the form validates a data field when its value changes.
• Manually—the form validates data fields when the Validate() method is called. You can also call the Validate(String) method to validate a specific data field.

Note

The form also validates data fields when the Commit() method is called. If values are not valid, they are not committed to the underlying data object.

See the following topic for more information: Validate User Input in Data Form View for Xamarin.Forms.

Example

The example below enables the data form to validate the user input when an editor loses focus.

XAML

<dxdf:DataFormView x:Name="dataForm" 
                   ValidationMode="LostFocus">
    <!-- ... -->
</dxdf:DataFormView>