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

 
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equivalentCodeEntity

Cast the value of this XElement 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 (
	element As XElement
) As Nullable(Of Double)

Parameters

element
Type: System.Xml.Linq.XElement

The XElement 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 XElement.

Exception Condition
FormatException

The element does not contain a valid Double value.

The following example creates an element with double precision floating point content. It then retrieves the value by casting to Nullable(Of T) of Double.


                Dim root As XElement = _
        <Root>
            <Value>1.79769313486231e308</Value>
        </Root>

Dim value As Nullable(Of Double) = CType(root.Element("Value"), 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 8
.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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