CriteriaOperator.UnregisterCustomFunction(ICustomFunctionOperator) Method

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

Namespace: DevExpress.Data.Filtering

Assembly: DevExpress.Data.v18.2.dll

Declaration

C#

public static bool UnregisterCustomFunction(
    ICustomFunctionOperator customFunction
)

VB.NET

Public Shared Function UnregisterCustomFunction(
    customFunction As ICustomFunctionOperator
) As Boolean

Parameters

Name	Type	Description
customFunction	ICustomFunctionOperator	An ICustomFunctionOperator object instance specifying a custom function to unregister.

Returns

Type	Description
Boolean	true if the customFunction has successfully been removed from a collection returned by the CriteriaOperator.GetCustomFunctions function; otherwise, false.

Remarks

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

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the UnregisterCustomFunction(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-register-a-custom-filter-function-and-use-it-in-gridcontrol-e3514/CS/WindowsApplication3/IsDayOffFunction.cs#L18

{
    return CriteriaOperator.UnregisterCustomFunction(instance);
}

VB.NET

how-to-register-a-custom-filter-function-and-use-it-in-gridcontrol-e3514/VB/WindowsApplication3/IsDayOffFunction.vb#L18

Public Shared Function Unregister() As Boolean
    Return CriteriaOperator.UnregisterCustomFunction(instance)
End Function