xpo-devexpress-dot-xpo-dot-xpview-5b611d93.md
Gets or sets the criteria associated with the view.
Namespace : DevExpress.Xpo
Assembly : DevExpress.Xpo.v25.2.dll
NuGet Package : DevExpress.Xpo
[DefaultValue(null)]
public CriteriaOperator Criteria { get; set; }
<DefaultValue(Nothing)>
Public Property Criteria As CriteriaOperator
| Type | Default | Description |
|---|---|---|
| CriteriaOperator | null |
A CriteriaOperator descendant which represents the criteria associated with the view.
|
Use the Criteria property to change the criteria by which the persistent objects will be filtered while the view is being loaded. Changing this property immediately refreshes the view.
For examples and additional information about filter expressions, see these help topics:
The following sample code demonstrates how to display persons who are older than 30. Only those persistent objects whose Age property’s value is greater than 30 are retrieved.
The image below shows the result.
using DevExpress.Xpo;
using DevExpress.Data.Filtering;
// ...
class SampleTable : XPBaseObject {
private int id;
private string name;
private int age;
SampleTable(Session session) : base(session) {
this.name = "John";
this.age = 25;
}
[Key(true)]
public int ID {
get { return id; }
set { SetPropertyValue<int>(nameof(ID), id, value); }
}
public string Name {
get { return name; }
set { SetPropertyValue<string>(nameof(Name), name, value); }
}
public int Age {
get { return age; }
set { SetPropertyValue<int>(nameof(Age), age, value); }
}
}
// ...
xpView1.Criteria = CriteriaOperator.Parse("Age > 30", null);
Imports DevExpress.Xpo
Imports DevExpress.Data.Filtering
' ...
Class SampleTable
Inherits XPBaseObject
Private _id As Integer
Private _name As String
Private _age As Integer
Public Sub New(ByVal _session As Session)
MyBase.New(_session)
Me._name = "John"
Me._age = 25
End Sub
<Key(True)> _
Public Property ID() As Integer
Get
Return _id
End Get
Set(ByVal Value As Integer)
SetPropertyValue(Of Integer)(NameOf(FullName), _id, Value)
End Set
End Property
Public Property Name() As String
Get
Return _name
End Get
Set(ByVal Value As String)
SetPropertyValue(Of String)(NameOf(Name), _name, Value)
End Set
End Property
Public Property Age() As Integer
Get
Return _age
End Get
Set(ByVal Value As Integer)
SetPropertyValue(Of Integer)(NameOf(Age), _age, Value)
End Set
End Property
End Class
' ...
XpView1.Criteria = CriteriaOperator.Parse("Age > 30", Nothing)
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the Criteria property.
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.
asp-net-mvc-grid-custom-binding-and-xpo/CS/XPCustomBindingExample/XPO/XpoBindingHandlers.cs#L40
XPView data = new XPView(Session, ClassInfo);
data.Criteria = CriteriaOperator.Parse(e.FilterExpression) & GetGroupFilter(e.GroupInfoList);
foreach(GridViewSummaryItemState summaryItem in e.SummaryItems) {
asp-net-mvc-grid-custom-binding-and-xpo/VB/XPCustomBindingExample/XPO/XpoBindingHandlers.vb#L40
Dim data As New XPView(Session, ClassInfo)
data.Criteria = CriteriaOperator.Parse(e.FilterExpression) And GetGroupFilter(e.GroupInfoList)
For Each summaryItem As GridViewSummaryItemState In e.SummaryItems
See Also