CriteriaOperator.RegisterCustomFunction(ICustomFunctionOperator) Method

Registers the specified custom function.

Namespace: DevExpress.Data.Filtering

Assembly: DevExpress.XamarinForms.Core.dll

Declaration

public static void RegisterCustomFunction(
    ICustomFunctionOperator customFunction
)

Parameters

Name	Type	Description
customFunction	ICustomFunctionOperator	Custom function to register in the Criteria Language.

Remarks

The CriteriaOperator.GetCustomFunction(String) and CriteriaOperator.GetCustomFunctions methods return registered functions.

You can use the CriteriaOperator.UnregisterCustomFunction(String) or CriteriaOperator.UnregisterCustomFunction(ICustomFunctionOperator) to cancel function registration.

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the RegisterCustomFunction(ICustomFunctionOperator) method.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

how-to-create-and-register-custom-filter-editor-functions/CS/DXApplication5/CustomFunctions/NotBeginsWith.cs#L13

public static void Register() {
    CriteriaOperator.RegisterCustomFunction(instance);
}

reporting-custom-functions-in-the-expression-editor/CS/dxSample/Program.cs#L15

Application.SetCompatibleTextRenderingDefault(false);
DevExpress.Data.Filtering.CriteriaOperator.RegisterCustomFunction(new NewLineConstant());
DevExpress.Data.Filtering.CriteriaOperator.RegisterCustomFunction(new CustomFormatFunction());

how-to-register-a-custom-filter-function-and-use-it-in-gridcontrol-e3514/CS/WindowsApplication3/IsDayOffFunction.cs#L14

{
    CriteriaOperator.RegisterCustomFunction(instance);
}

how-to-use-a-custom-function-in-conditional-formatting-t167315/CS/CustomFilterOperationExample/MainWindow.xaml.cs#L28

    InitializeComponent();
    CriteriaOperator.RegisterCustomFunction(new CustomFunction());
}

how-to-make-the-auto-filter-rows-filter-accent-insensitive-e5021/CS/DxSample/Program.cs#L23

UserLookAndFeel.Default.SkinName = "Lilian";
CriteriaOperator.RegisterCustomFunction(new RemoveDiacriticsFunction());
Application.Run(new MainForm());

VB.NET

how-to-create-and-register-custom-filter-editor-functions/VB/DXApplication5/CustomFunctions/NotBeginsWith.vb#L10

Public Shared Sub Register()
    CriteriaOperator.RegisterCustomFunction(instance)
End Sub

reporting-custom-functions-in-the-expression-editor/VB/dxSample/Program.vb#L19

Application.SetCompatibleTextRenderingDefault(False)
DevExpress.Data.Filtering.CriteriaOperator.RegisterCustomFunction(New NewLineConstant())
DevExpress.Data.Filtering.CriteriaOperator.RegisterCustomFunction(New CustomFormatFunction())

how-to-register-a-custom-filter-function-and-use-it-in-gridcontrol-e3514/VB/WindowsApplication3/IsDayOffFunction.vb#L15

Public Shared Sub Register()
    CriteriaOperator.RegisterCustomFunction(instance)
End Sub

how-to-use-a-custom-function-in-conditional-formatting-t167315/VB/CustomFilterOperationExample/MainWindow.xaml.vb#L27

    InitializeComponent()
    CriteriaOperator.RegisterCustomFunction(New CustomFunction())
End Sub

how-to-make-the-auto-filter-rows-filter-accent-insensitive-e5021/VB/DxSample/Program.vb#L27

UserLookAndFeel.Default.SkinName = "Lilian"
CriteriaOperator.RegisterCustomFunction(New RemoveDiacriticsFunction())
Application.Run(New MainForm())