XPTypeInfo.AddAttribute(Attribute) Method

Adds a new attribute to the attribute collection of the type.

Namespace: DevExpress.Xpo.Metadata

Assembly: DevExpress.Xpo.v24.2.dll

Declaration

C#

public void AddAttribute(
    Attribute attribute
)

VB.NET

Public Sub AddAttribute(
    attribute As Attribute
)

Parameters

Name	Type	Description
attribute	Attribute	A Attribute descendant which represents the attribute for this type.

Remarks

The collection of attributes can be accessed via the XPTypeInfo.Attributes property.

If the collection contains the attribute being added by the AddAttribute method, the old attribute is replaced by the new one. To ensure that the type has a specific attribute use the XPTypeInfo.HasAttribute method.

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the AddAttribute(Attribute) 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-an-xpclassinfo-descendant-to-dynamically-build-a-persistent-class-structure-e1729/CS/DynamicDataTable/DynamicDataTableClassInfo.cs#L19

XPCustomMemberInfo member = CreateMember(column.Caption, column.DataType);
member.AddAttribute(new PersistentAttribute(column.ColumnName));
member.AddAttribute(new DisplayNameAttribute(column.Caption));

XPO_how-to-dynamically-create-a-read-only-calculated-persistent-alias-property-e3473/CS/ConsoleApplication17/XPAliasedMemberInfo.cs#L16

    Owner.AddMember(this);
    this.AddAttribute(new PersistentAliasAttribute(expression));
}

XPO_how-to-persist-metadata-e269/CS/MetadataObjects.cs#L27

foreach(PersistentAttributeInfo a in TypeAttributes) {
    ti.AddAttribute(a.Create());
}

XPO_how-to-create-persistent-classes-mapped-to-tables-with-a-composite-primary-key-at-runtime-e4606/CS/XpoConsoleApplication/XPComplexCustomMemberInfo.cs#L20

    Attribute attribute = attributes[i];
    this.AddAttribute(attribute);
}

XPO_how-to-generate-persistent-classes-at-runtime-based-on-a-dataset-e1198/CS/WindowsApplication4/Form1.cs#L31

    if (key == c.Name)
        mi.AddAttribute(new KeyAttribute(c.IsIdentity));
}

VB.NET

XPO_how-to-create-an-xpclassinfo-descendant-to-dynamically-build-a-persistent-class-structure-e1729/VB/DynamicDataTable/DynamicDataTableClassInfo.vb#L23

Dim member As XPCustomMemberInfo = CreateMember(column.Caption, column.DataType)
member.AddAttribute(New PersistentAttribute(column.ColumnName))
member.AddAttribute(New DisplayNameAttribute(column.Caption))

XPO_how-to-persist-metadata-e269/VB/MetadataObjects.vb#L43

For Each a As PersistentAttributeInfo In TypeAttributes
    ti.AddAttribute(a.Create())
Next a

XPO_how-to-generate-persistent-classes-at-runtime-based-on-a-dataset-e1198/VB/WindowsApplication4/Form1.vb#L29

If key = c.Name Then
    mi.AddAttribute(New KeyAttribute(c.IsIdentity))
End If