XElement Narrowing Conversion (XElement to Nullable(Of DateTime))
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Cast the value of this XElement to a Nullable(Of T) of DateTime.
Assembly: System.Xml.Linq (in System.Xml.Linq.dll)
'Declaration Public Shared Narrowing Operator CType ( _ element As XElement _ ) As Nullable(Of DateTime)
Parameters
- element
- Type: System.Xml.Linq.XElement
The XElement to cast to Nullable(Of T) of DateTime.
Return Value
Type: System.Nullable(Of DateTime)A Nullable(Of T) of DateTime that contains the content of this XElement.
| Exception | Condition |
|---|---|
| FormatException | The element does not contain a valid DateTime value. |
The value space of an attribute or element that contains date and time content is closely related to the dates and times described in ISO 8601. When creating an attribute or element that contains date and time content, the attribute or element values are formatted per the W3C specification. For more information, see the NOTE-datetime W3C specification.
Behavior is lax when casting to a Nullable(Of T) of DateTime 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 DateTime.
This conversion operator uses CultureInfo.InvariantCulture to convert from a DateTime.
The following example creates an element with a date and time as content. It then retrieves the value by casting to Nullable(Of T) of DateTime.