XmlRootAttribute.IsNullable Property
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Gets or sets a value that indicates whether the XmlSerializer must serialize a member that is set to Nothing into the xsi:nil attribute set to true.
Assembly: System.Xml (in System.Xml.dll)
Property Value
Type: System.Booleantrue if the XmlSerializer generates the xsi:nil attribute; otherwise, false.
The XML schema specification for structures allows an XML document to explicitly signal that an element's content is missing. Such an element contains the attribute xsi:nil set to true. For more information, see the http://www.w3.org/TR/xmlschema-1/ specification, XML Schema Part 1: Structures.
If the IsNullable property is set to true, the xsi:nil attribute is generated as shown in the following XML.
<?xml version="1.0" encoding="utf-8"?> <Group xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xsi:nil="true" />
If the IsNullable property is false, an empty element is created as shown in the following code.
<?xml version="1.0" encoding="utf-8"?> <Group xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" />
The following example serializes a class named Group. The example applies the XmlRootAttribute to the class, and sets the IsNullable property to false.