XPClassInfo.CreateMember(String, XPClassInfo, Boolean, Attribute[]) Method

Creates a new member metadata which is referenced to the specified XPClassInfo object.

Namespace: DevExpress.Xpo.Metadata

Assembly: DevExpress.Xpo.v23.2.dll

NuGet Packages: DevExpress.Win.PivotGrid, DevExpress.Win.TreeMap, DevExpress.Xpo

NuGet Package: DevExpress.Xpo

Declaration

C#

public XPCustomMemberInfo CreateMember(
    string propertyName,
    XPClassInfo referenceType,
    bool nonPersistent,
    params Attribute[] attributes
)

VB.NET

Public Function CreateMember(
    propertyName As String,
    referenceType As XPClassInfo,
    nonPersistent As Boolean,
    ParamArray attributes As Attribute()
) As XPCustomMemberInfo

Parameters

Name	Type	Description
propertyName	String	A String value which specifies the name of the new member.
referenceType	XPClassInfo	An XPClassInfo object that provides the metadata of the class which the new property references.
nonPersistent	Boolean	true if the new member is non persistent; otherwise, false.
attributes	Attribute[]	An array of Attribute objects that represent the attributes of the new member.

Returns

Type	Description
XPCustomMemberInfo	An XPCustomMemberInfo descendant which provides the new member’s metadata.

Remarks

The CreateMember method allows custom members to be created dynamically.

Example

The following sample code shows how to create custom fields using the XPClassInfo.CreateMember method.

C#

using DevExpress.Xpo;
using DevExpress.Xpo.Metadata;
// ...

XPClassInfo customerClassInfo = Session.DefaultSession.GetClassInfo(typeof(Customer));
customerClassInfo.CreateMember("Name", typeof(string));
customerClassInfo.CreateMember("CompanyName", typeof(string));
// Set the nonPersistent parameter to true for collection properties
customerClassInfo.CreateMember("Orders", typeof(XPCollection), true, 
    new AssociationAttribute("CustomerOrders", typeof(Order)), new AggregatedAttribute());

VB.NET

Imports DevExpress.Xpo
Imports DevExpress.Xpo.Metadata
' ...

Dim customerClassInfo As XPClassInfo = Session.DefaultSession.GetClassInfo(GetType(Customer))
customerClassInfo.CreateMember("Name", GetType(String))
customerClassInfo.CreateMember("CompanyName", GetType(String))
' Set the nonPersistent parameter to True for collection properties
customerClassInfo.CreateMember("Orders", GetType(XPCollection), True, _
    New AssociationAttribute("CustomerOrders", GetType(Order)), New AggregatedAttribute())