AggregateOperand.Count() Method

Creates a new AggregateOperand which returns the count of AggregateOperand.CollectionProperty elements that match the AggregateOperand.Condition.

Namespace: DevExpress.Data.Filtering

Assembly: DevExpress.Data.v19.1.dll

Declaration

C#

public AggregateOperand Count()

VB.NET

Public Function Count As AggregateOperand

Returns

Type	Description
AggregateOperand	An AggregateOperand object which calculates an aggregate expression.

Related GitHub Examples

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

XPO_how-to-create-a-filter-with-an-aggregate-function-for-a-child-collection-e1329/CS/Form1.cs#L318

private void btnFiterSimplified_Click(object sender, System.EventArgs e) {
    CriteriaOperator criteria = new OperandProperty("Orders")[null].Count() > 0;
    SetFilter(criteria);

VB.NET

XPO_how-to-create-a-filter-with-an-aggregate-function-for-a-child-collection-e1329/VB/Form1.vb#L304

Private Sub btnFiterSimplified_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnFiterSimplified.Click
    Dim criteria As CriteriaOperator = New OperandProperty("Orders").Item(Nothing).Count() > 0
    SetFilter(criteria)