Reads the current element and returns the contents as a 64-bit signed integer.
Assembly: System.Xml (in System.Xml.dll)
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 nullptr arguments.
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.
The example uses the dataFile.xml file as input.
.NET FrameworkSupported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0
.NET Framework Client ProfileSupported in: 4, 3.5 SP1
XNA FrameworkSupported in: 3.0, 2.0, 1.0
Portable Class LibrarySupported in: Portable Class Library
Supported in: Windows Phone 8.1
Supported in: Windows Phone Silverlight 8.1
Supported in: Windows Phone Silverlight 8