CriteriaOperator.UnregisterCustomFunction(String) Method

Unregisters a custom function with a specified name from use in any CriteriaOperator-based criteria in your application.

Namespace: DevExpress.Data.Filtering

Assembly: DevExpress.Data.v24.2.dll

NuGet Package: DevExpress.Data

Declaration

C#

public static bool UnregisterCustomFunction(
    string functionName
)

VB.NET

Public Shared Function UnregisterCustomFunction(
    functionName As String
) As Boolean

Parameters

Name	Type	Description
functionName	String	The name of a custom function to unregister.

Returns

Type	Description
Boolean	true if a custom function whose name matches the functionName has successfully been removed from a collection returned by the CriteriaOperator.GetCustomFunctions function; otherwise, false.

Remarks

To remove a custom function instance, call the other CriteriaOperator.UnregisterCustomFunction overloaded method and pass the instance as its parameter.

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the UnregisterCustomFunction(String) 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#

reporting-winforms-use-a-custom-function-in-query-expression/CS/SelectQueryWindowsFormsApplication/StDevOperator.cs#L13

public static void Unregister() {
    CriteriaOperator.UnregisterCustomFunction(name);
}

VB.NET

reporting-winforms-use-a-custom-function-in-query-expression/VB/SelectQueryWindowsFormsApplication/StDevOperator.vb#L14

Public Shared Sub Unregister()
    CriteriaOperator.UnregisterCustomFunction(name_Renamed)
End Sub