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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)
abstract ReadElementContentAsLong : unit -> int64  
override ReadElementContentAsLong : unit -> int64

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 a null reference (Nothing in Visual Basic) arguments.

InvalidOperationException

An XmlReader method was called before a previous asynchronous operation finished. In this case, InvalidOperationException is thrown with the message “An asynchronous operation is already in progress.”

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 the Remarks section of the XmlReader reference page.

The following example uses the ReadElementContentAsLong method to read the content of the longValue element.

No code example is currently available or this language may not be supported.

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>

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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