ICustomAggregateConvertibleToExpression.Convert(ICriteriaToExpressionConverter, Expression, ParameterExpression, Expression[]) Method

When implemented by a custom aggregate function, converts it to a Linq expression.

Namespace: DevExpress.Data.Filtering

Assembly: DevExpress.Data.v24.2.dll

Declaration

C#

Expression Convert(
    ICriteriaToExpressionConverter converter,
    Expression collectionProperty,
    ParameterExpression elementParameter,
    params Expression[] operands
)

VB.NET

Function Convert(
    converter As ICriteriaToExpressionConverter,
    collectionProperty As Expression,
    elementParameter As ParameterExpression,
    ParamArray operands As Expression()
) As Expression

Parameters

Name	Type	Description
converter	DevExpress.Data.Linq.ICriteriaToExpressionConverter	An DevExpress.Data.Linq.Helpers.ICriteriaToExpressionConverter object that converts a criteria to an expression.
collectionProperty	Expression	An Expression that returns a collection used to calculate a custom aggregate.
elementParameter	ParameterExpression	An Expression that returns a collection’s item that provides arguments for the custom aggregate function.
operands	Expression[]	An array of Expressions that specify aggregate function operands.

Returns

Type	Description
Expression	An Expression object that specifies a LINQ expression.

Remarks

You can use this interface if you require a custom aggregate function to work with the following server-mode sources:LinqServerModeSource, LinqInstantFeedbackSource, PLinqServerModeSource, PLinqInstantFeedbackSource, EntityServerModeSource, and EntityInstantFeedbackSource.