XPTypeInfo.GetAttributeInfo(Type) Method

Returns the attribute of the specified type.

Assembly: DevExpress.Xpo.v21.2.dll

Declaration

C#
VB.NET

public Attribute GetAttributeInfo(
    Type attributeType
)

Public Function GetAttributeInfo(
    attributeType As Type
) As Attribute

Parameters

Name	Type	Description
attributeType	Type	A Type descendant which represents the type of the attribute to retrieve.

Returns

Type	Description
Attribute	A Attribute descendant of the specified type. null (Nothing in Visual Basic) if an attribute of the specified type isn’t found. In this case the RequiredAttributeMissingException is thrown.

Remarks

Use the XPTypeInfo.HasAttribute method to determine whether the XPTypeInfo.Attributes collection contains an attribute of the specified type.

The following code snippets (auto-collected from DevExpress Examples) contain references to the GetAttributeInfo(Type) 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#
VB.NET

XPO_how-to-dynamically-create-a-read-only-calculated-persistent-alias-property-e3473/CS/ConsoleApplication17/XPAliasedMemberInfo.cs#L27

}
PersistentAliasAttribute persistentAliasAttribute = (PersistentAliasAttribute)this.GetAttributeInfo(typeof(PersistentAliasAttribute));
return new ExpressionEvaluator(Owner.GetEvaluatorContextDescriptor(), CriteriaOperator.Parse(persistentAliasAttribute.AliasExpression, new object[0]),

XPO_how-to-implement-odata4-service-with-xpo/CS/ODataService/App_Start/WebApiConfig.cs#L82

if(mi.IsAliased) {
    string aliasedExpr = ((PersistentAliasAttribute)mi.GetAttributeInfo(typeof(PersistentAliasAttribute))).AliasExpression;
    var aliasedCriteria = CriteriaOperator.Parse(aliasedExpr) as OperandProperty;

XPO_how-to-dynamically-create-a-read-only-calculated-persistent-alias-property-e3473/VB/ConsoleApplication17/XPAliasedMemberInfo.vb#L46

End If
Dim persistentAliasAttribute As PersistentAliasAttribute = CType(Me.GetAttributeInfo(GetType(PersistentAliasAttribute)), PersistentAliasAttribute)
Return (New ExpressionEvaluator(Owner.GetEvaluatorContextDescriptor(), CriteriaOperator.Parse(persistentAliasAttribute.AliasExpression, New Object(){}), caseSensitive, Owner.Dictionary.CustomFunctionOperators)).Evaluate(theObject)

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XPTypeInfo.GetAttributeInfo(Type) Method

Declaration

Parameters

Returns

Remarks

XPTypeInfo.GetAttributeInfo(Type) Method

Declaration

Parameters

Returns

Remarks

Related GitHub Examples