XmlReader.ReadElementContentAsLong Method (String, String)
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)
Parameters
- localName
- Type: System.String
The local name of the element.
- namespaceURI
- Type: System.String
The namespace URI of the element.
| Exception | Condition |
|---|---|
| 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. |
| ArgumentException | The specified local name and namespace URI do not match that of the current element being read. |
| 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 Reading Typed Data.
For the asynchronous version of this method, see ReadElementContentAsLongAsync.
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.
