Explicit Conversion (XAttribute to Nullable(Double))

XAttribute Narrowing Conversion (XAttribute to Nullable(Of Double))

 
equivalentCodeEntityop_Explicit(XAttribute attribute)

Cast the value of this XAttribute to a Nullable(Of T) of Double.

This API is not CLS-compliant.

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

Public Shared Narrowing Operator CType (
	attribute As XAttribute
) As Nullable(Of Double)

Parameters

attribute
Type: System.Xml.Linq.XAttribute

The XAttribute to cast to Nullable(Of T) of Double.

Return Value

Type: System.Nullable(Of Double)

A Nullable(Of T) of Double that contains the content of this XAttribute.

Exception Condition
FormatException

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(Of T) of Double.


                Dim root As XElement = <Root Att="1.79769313486231E+308"/>
Dim value As Nullable(Of Double) = CType(root.Attribute("Att"), Nullable(Of Double))
Console.WriteLine("Nullable double: value={0}", IIf(value.HasValue, value.ToString(), "null"))

This example produces the following output:

Nullable double: value=1.79769313486231E+308

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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