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XAttribute Narrowing Conversion (XAttribute to Nullable(Of DateTimeOffset))

Cast the value of this XAttribute to a Nullable(Of T) of DateTimeOffset.

This API is not CLS-compliant. 

Namespace:  System.Xml.Linq
Assemblies:   System.Xml.XDocument (in System.Xml.XDocument.dll)
  System.Xml.Linq (in System.Xml.Linq.dll)

Public Shared Narrowing Operator CType ( _
	attribute As XAttribute _
) As Nullable(Of DateTimeOffset)


Type: System.Xml.Linq.XAttribute

The XAttribute to cast to a Nullable(Of T) of DateTimeOffset.

Return Value

Type: System.Nullable(Of DateTimeOffset)
A Nullable(Of T) of DateTimeOffset that contains the content of this XAttribute.


The attribute does not contain a valid DateTimeOffset value.

This conversion operator uses the XmlConvert class to do the conversion.

The following example creates an attribute with a date and time as content. It then retrieves the value by casting to Nullable(Of T) of DateTimeOffset.

Dim root As XElement = _
        Att=<%= New DateTimeOffset(New DateTime(2006, 10, 6, 12, 30, 0)) %>/>
Dim value As Nullable(Of DateTimeOffset) = CType(root.Attribute("Att"), Nullable(Of DateTimeOffset))
Console.WriteLine("Nullable DateTimeOffset: value={0}", IIf(value.HasValue, value.ToString(), "null"))

This example produces the following output:

Nullable DateTimeOffset: value=10/6/2006 12:30:00 PM -07:00

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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