ICustomFunctionOperatorBrowsable Interface

Provides additional information (a function category, function description, parameter count, etc.) on custom functions for Expression Editors.

Namespace: DevExpress.Data.Filtering

Assembly: DevExpress.Data.v18.1.dll

Declaration

C#

public interface ICustomFunctionOperatorBrowsable :
    ICustomFunctionOperator

VB.NET

Public Interface ICustomFunctionOperatorBrowsable
    Inherits ICustomFunctionOperator

Remarks

Implement this interface in addition to the ICustomFunctionOperator interface to make your custom function available for end-users in Expression Editors. If you want to use your custom function in CriteriaOperator-based criteria on the server side (to query a database), implement the ICustomFunctionOperatorFormattable interface as well.

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the ICustomFunctionOperatorBrowsable interface.

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#

reporting-custom-functions-in-the-expression-editor/CS/dxSample/Custom Expression Editor Functions/NewLineFunction.cs#L7

namespace dxSample {
    public class NewLineConstant : ICustomFunctionOperatorBrowsable {
        public FunctionCategory Category {

how-to-register-a-custom-filter-function-and-use-it-in-gridcontrol-e3514/CS/WindowsApplication3/IsDayOffFunction.cs#L8

namespace DXSample {
    public class IsDayOffFunction : ICustomFunctionOperatorBrowsable {
        const string FunctionName = "IsDayOff";

Reporting_how-to-use-a-custom-function-in-a-query-expression-t352441/CS/SelectQueryWindowsFormsApplication/StDevOperator.cs#L7

namespace SelectQueryWindowsFormsApplication {
    public sealed class StDevOperator : ICustomFunctionOperatorBrowsable, ICustomFunctionOperatorFormattable {
        const string name = "StDev";

VB.NET

reporting-custom-functions-in-the-expression-editor/VB/dxSample/Custom Expression Editor Functions/NewLineFunction.vb#L8

Public Class NewLineConstant
    Implements ICustomFunctionOperatorBrowsable

how-to-register-a-custom-filter-function-and-use-it-in-gridcontrol-e3514/VB/WindowsApplication3/IsDayOffFunction.vb#L10

Public Class IsDayOffFunction
    Implements ICustomFunctionOperatorBrowsable
    Private Const FunctionName As String = "IsDayOff"

Reporting_how-to-use-a-custom-function-in-a-query-expression-t352441/VB/SelectQueryWindowsFormsApplication/StDevOperator.vb#L8

Public NotInheritable Class StDevOperator
    Implements ICustomFunctionOperatorBrowsable, ICustomFunctionOperatorFormattable