XAttribute Explicit Conversion (XAttribute to Nullable<Double>)


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equivalentCodeEntityop_Explicit(XAttribute attribute)

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

This API is not CLS-compliant.

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

public static explicit operator Nullable<double> (
	XAttribute attribute


Type: System.Xml.Linq.XAttribute

The XAttribute to cast to Nullable<T> of Double.

Return Value

Type: System.Nullable<Double>

A Nullable<T> of Double that contains the content of this XAttribute.

Exception Condition

The attribute does not contain a valid Double value.

The following example creates an attribute with double precision floating point content. It then retrieves the value by casting to Nullable<T> of Double.

                XElement root = new XElement("Root",
    new XAttribute("Att", 1.79769313486231e308)
double? value = (double?)root.Attribute("Att");
Console.WriteLine("Nullable double: value={0}", value == null ? "null" : value.ToString());

This example produces the following output:

Nullable double: value=1.79769313486231E+308

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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