XElement Narrowing Conversion (XElement to Nullable(Of Single))
[ 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 Single.
Assembly: System.Xml.Linq (in System.Xml.Linq.dll)
'Declaration Public Shared Narrowing Operator CType ( _ element As XElement _ ) As Nullable(Of Single)
Parameters
- element
- Type: System.Xml.Linq.XElement
The XElement to cast to Nullable(Of T) of Single.
Return Value
Type: System.Nullable(Of Single)A Nullable(Of T) of Single that contains the content of this XElement.
| Exception | Condition |
|---|---|
| FormatException | The element does not contain a valid Single value. |
The following example creates an element with single precision floating point content. It then retrieves the value by casting to Nullable(Of T) of Single.
Dim output As New StringBuilder Dim root As XElement = _ <Root> <Value>3.402823e38</Value> </Root> Dim value As Nullable(Of Single) = CType(root.Element("Value"), Nullable(Of Single)) output.Append(String.Format("Nullable Single: value={0}", If(value.HasValue, _ value.ToString(), "null"))) output.Append(Environment.NewLine) OutputTextBlock.Text = output.ToString()
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