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XAttribute.Explicit Operator

Cast the value of this XAttribute to a Nullable<T> of Guid.

This API is not CLS-compliant. 

Namespace:  System.Xml.Linq
Assembly:  System.Xml.Linq (in System.Xml.Linq.dll)

public static explicit operator Nullable<Guid> (
	XAttribute attribute
)

Parameters

attribute
Type: System.Xml.Linq.XAttribute

The XAttribute to cast to a Nullable<T> of Guid.

Return Value

Type: System.Nullable<Guid>
A Nullable<T> of Guid that contains the content of this XAttribute.

ExceptionCondition
FormatException

The attribute does not contain a valid Guid value.

The following example creates an attribute with guid content. It then retrieves the value by casting to Nullable<T> of Guid.

XElement root = new XElement("Root",
    new XAttribute("Att", new Guid("3c1cc55b-baff-4b7a-9d17-077af3aa5730"))
);
Guid? value = (Guid?)root.Attribute("Att");
Console.WriteLine("Nullable Guid: value={0}", value == null ? "null" : value.ToString());

This example produces the following output:

Nullable Guid: value=3c1cc55b-baff-4b7a-9d17-077af3aa5730

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

Supported in: 3.5

.NET Compact Framework

Supported in: 3.5

XNA Framework

Supported in: 3.0

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