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XmlReader.ReadElementContentAsLong Method ()

Reads the current element and returns the contents as a 64-bit signed integer.

Namespace: System.Xml
Assembly: System.Xml (in system.xml.dll)

public virtual long ReadElementContentAsLong ()
public long ReadElementContentAsLong ()
public function ReadElementContentAsLong () : long
Not applicable.

Return Value

The element content as a 64-bit signed integer.

Exception typeCondition

InvalidOperationException

The XmlReader is not positioned on an element.

XmlException

The current element contains child elements.

-or-

The element content cannot be converted to a 64-bit signed integer.

ArgumentNullException

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:long, the reader returns an unboxed 64-bit signed integer. If the content is not typed xsd:long, the reader attempts to convert it to a 64-bit signed integer 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 ReadElementContentAsLong method to read the content of the longValue element.

using (XmlReader reader = XmlReader.Create("dataFile.xml")) {
     reader.ReadToFollowing("longValue");
     long number = reader.ReadElementContentAsLong();
     // Do some processing with the number object.
}

The example uses the dataFile.xml file as input.

<root>
  <stringValue>
     <!--comment-->
     <?some pi?>
      text value of the element.
  </stringValue>
  <longValue>270000000000001</longValue>
  <number>0</number>
  <double>2E10</double>
  <date>2003-01-08T15:00:00-00:00</date>
</root>

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 Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

.NET Compact Framework

Supported in: 2.0

XNA Framework

Supported in: 1.0

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