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()

Return Value

Type: System.Int64
The element content as a 64-bit signed integer.

ExceptionCondition
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 null 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 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0

.NET Compact Framework

Supported in: 3.5, 2.0

XNA Framework

Supported in: 3.0, 2.0, 1.0
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