XmlReader.ReadElementContentAsDouble Method ()
Assembly: System.Xml (in system.xml.dll)
'Declaration Public Overridable Function ReadElementContentAsDouble As Double 'Usage Dim instance As XmlReader Dim returnValue As Double returnValue = instance.ReadElementContentAsDouble
Return ValueThe element content as a double-precision floating-point number.
The XmlReader is not positioned on an element.
The current element contains child elements.
The element content cannot be converted to a double-precision floating-point number.
The method is called with a null reference (Nothing in Visual Basic) arguments.
This method reads the start tag, the contents of the element, and moves the reader past the end element tag. It expands entities and ignores processing instructions and comments. The element can only contain simple content. That is, it cannot have child elements.
If the content is typed xsd:double, the reader returns a double-precision floating-point number. If the content is not typed xsd:double, the reader attempts to convert it to a double-precision floating-point number according to the rules defined by the W3C XML Schema Part 2: Datatypes recommendation.
For more information, see Reading Typed Data.
The following example uses the method to return the element content as a double-precision floating-point number.
Using reader As XmlReader = XmlReader.Create("dataFile.xml") reader.ReadToFollowing("double") Dim number As [Double] = reader.ReadElementContentAsDouble() ' Do some processing with the number object. End Using
The example uses the dataFile.xml file as input.
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter EditionThe Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.