XElement Explicit Conversion (XElement to Nullable<TimeSpan>)


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Cast the value of this XElement to a Nullable<T> of TimeSpan.

This API is not CLS-compliant.

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

public static explicit operator Nullable<TimeSpan> (
	XElement element


Type: System.Xml.Linq.XElement

The XElement to cast to Nullable<T> of TimeSpan.

Return Value

Type: System.Nullable<TimeSpan>

A Nullable<T> of TimeSpan that contains the content of this XElement.

Exception Condition

The element 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<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<T> of TimeSpan.

The following example creates an element with time span content. It then retrieves the value by casting to Nullable<T> of TimeSpan.

                XElement root = new XElement("Root",
    new XElement("Value", new TimeSpan(1, 5, 30))
TimeSpan? value = (TimeSpan?)root.Element("Value");
Console.WriteLine("Nullable TimeSpan: value={0}", value == null ? "null" : value.ToString());

This example produces the following output:

Nullable TimeSpan: value=01:05:30

Universal Windows Platform
Available since 8
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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