XAttribute Narrowing Conversion (XAttribute to Nullable(Of TimeSpan))
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Cast the value of this XAttribute to a Nullable(Of T) of TimeSpan.
Assembly: System.Xml.Linq (in System.Xml.Linq.dll)
'Declaration Public Shared Narrowing Operator CType ( _ attribute As XAttribute _ ) As Nullable(Of TimeSpan)
Parameters
- attribute
- Type: System.Xml.Linq.XAttribute
The XAttribute to cast to a Nullable(Of T) of TimeSpan.
Return Value
Type: System.Nullable(Of TimeSpan)A Nullable(Of T) of TimeSpan that contains the content of this XAttribute.
| Exception | Condition |
|---|---|
| FormatException | The attribute does not contain a valid TimeSpan value. |
The value space of an attribute or element that contains time span content is closely related to duration content as described in ISO 8601. When creating an attribute or element that contains time span content, the attribute or element values are formatted per the W3C specification. Please see the W3C specification for more details.
Behavior is lax when casting to a Nullable(Of T) of TimeSpan from an attribute or element. Even if the attribute or element value is not formatted exactly per the W3C specification, the value is appropriately converted to a Nullable(Of T) of TimeSpan.