InOperator Class

An operator which determines if a value matches any value in a specified list.

Namespace: DevExpress.Data.Filtering

Assembly: DevExpress.Data.v18.1.dll

Declaration

C#

public class InOperator :
    CriteriaOperator

VB.NET

Public Class InOperator
    Inherits CriteriaOperator

Related API Members

The following members accept/return InOperator objects:

• InOperator.Clone()

Remarks

The InOperator can be used to build criteria expressions when filtering objects. To learn more, see Creating Criteria and Criteria Operators.

In the following example, the contents of the XPCollection are filtered to display only those persons whose names are specified in the list.

C#

xpCollection1.Filter = new InOperator("Name", new string[] {"John", "Mike", "Nick"});

VB.NET

XPCollection1.Filter = New InOperator("Name", New String() {"John", "Mike", "Nick"})

The image below shows the result:

Related GitHub Examples

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

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-represent-field-filters-in-the-prefilter-e1678/CS/Form1.cs#L34

    rootGroup = new GroupOperator(GroupOperatorType.And, rootGroup);
InOperator op = rootGroup.Operands.Find(delegate(CriteriaOperator item) {
    InOperator binOp = item as InOperator;

XDL_how-to-delete-all-criteria-corresponding-to-a-particular-field-from-criteriaoperator-e3396/CS/PatchCriteriaExample/Filtering/CriteriaPatcherSkipProperties.cs#L55

public override CriteriaOperator Visit(InOperator theOperator) {
    var result = (InOperator)base.Visit(theOperator);

how-to-make-the-auto-filter-rows-filter-accent-insensitive-e5021/CS/DxSample/Filtering/ClientCriteriaVisitorBase.cs#L64

protected virtual CriteriaOperator VisitIn(InOperator theOperator) {
    CriteriaOperator leftOperand = this.AcceptOperator(theOperator.LeftOperand);

XAF_categorizedlisteditor-how-to-show-subcategory-items-when-a-parent-category-is-selected-e1415/CS/WinSample.Module.Win/MyCategorizedListEditor.cs#L55

    string categoryKeyPropertyName = String.Format("{0}.{1}", CategoryPropertyName, CategoriesListView.ObjectTypeInfo.KeyMember.Name);
    this.ItemsDataSource.Criteria[CategoryPropertyName] = new InOperator(categoryKeyPropertyName, categoryKeys);
}

XAF_how-to-show-the-grandchildren-collection-in-the-detailview-e1448/CS/WinSample.Module/Master.cs#L37

if (Details.Count > 0) {
    _SubDetails = new XPCollection<SubDetail>(Session, new InOperator("Detail", Details));
} else {

VB.NET

how-to-represent-field-filters-in-the-prefilter-e1678/VB/Form1.vb#L38

End If
Dim op As InOperator = CType(rootGroup.Operands.Find(Function(item As CriteriaOperator)
                                                         Dim binOp As InOperator = TryCast(item, InOperator)

XDL_how-to-delete-all-criteria-corresponding-to-a-particular-field-from-criteriaoperator-e3396/VB/PatchCriteriaExample/Filtering/CriteriaPatcherSkipProperties.vb#L75

Public Overrides Function Visit(ByVal theOperator As InOperator) As CriteriaOperator
    Dim result = CType(MyBase.Visit(theOperator), InOperator)

how-to-make-the-auto-filter-rows-filter-accent-insensitive-e5021/VB/DxSample/Filtering/ClientCriteriaVisitorBase.vb#L72

Protected Overridable Function VisitIn(ByVal theOperator As InOperator) As CriteriaOperator
    Dim leftOperand As CriteriaOperator = Me.AcceptOperator(theOperator.LeftOperand)

XAF_categorizedlisteditor-how-to-show-subcategory-items-when-a-parent-category-is-selected-e1415/VB/WinSample.Module.Win/MyCategorizedListEditor.vb#L59

    Dim categoryKeyPropertyName As String = String.Format("{0}.{1}", CategoryPropertyName, CategoriesListView.ObjectTypeInfo.KeyMember.Name)
    Me.ItemsDataSource.Criteria(CategoryPropertyName) = New InOperator(categoryKeyPropertyName, categoryKeys)
End If

XAF_how-to-show-the-grandchildren-collection-in-the-detailview-e1448/VB/WinSample.Module/Master.vb#L45

If Details.Count > 0 Then
    _SubDetails = New XPCollection(Of SubDetail)(Session, New InOperator("Detail", Details))
Else

Inheritance

Object

CriteriaOperator

InOperator