XmlReader.ReadElementContentAsLong Method (String, String)


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Checks that the specified local name and namespace URI matches that of the current element, then 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(
	string localName,
	string namespaceURI


Type: System.String

The local name of the element.

Type: System.String

The namespace URI of the element.

Return Value

Type: System.Int64

The element content as a 64-bit signed integer.

Exception Condition

The XmlReader is not positioned on an element.


The current element contains child elements.


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


The method is called with null arguments.


The specified local name and namespace URI do not match that of the current element being read.


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.

Universal Windows Platform
Available since 8
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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