Статья
11/18/2011

XNodeEqualityComparer.Equals Method (XNode, XNode)

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Compares the values of two nodes.

Namespace: System.Xml.Linq
Assembly: System.Xml.Linq (in System.Xml.Linq.dll)

Syntax

'Declaration
Public Function Equals ( _
    x As XNode, _
    y As XNode _
) As Boolean

public bool Equals(
    XNode x,
    XNode y
)

Parameters

x
Type: System.Xml.Linq.XNode
The first XNode to compare.

y
Type: System.Xml.Linq.XNode
The second XNode to compare.

Return Value

Type: System.Boolean
A Boolean indicating if the nodes are equal.

Implements

IEqualityComparer<T>.Equals(T, T)

Remarks

The following criteria determine whether two nodes are equal:

A nulla null reference (Nothing in Visual Basic) node is equal to another nulla null reference (Nothing in Visual Basic) node but unequal to a non-nulla null reference (Nothing in Visual Basic) node.
Two XNode objects of different types are never equal.
Two XText nodes are equal if they contain the same text.
Two XElement nodes are equal if they have the same tag name, the same set of attributes with the same values, and (ignoring comments and processing instructions), contain two equal-length sequences of pairwise equal content nodes.
Two XDocument objects are equal if their root nodes are equal.
Two XComment nodes are equal if they contain the same comment text.
Two XProcessingInstruction nodes are equal if they have the same target and data.
Two XDocumentType nodes are equal if the have the same name, public ID, system ID, and internal subset.

Examples

The following example uses this class to compare two nodes.

StringBuilder output = new StringBuilder();
XElement xmlTree1 = new XElement("Root",
    new XAttribute("Att1", 1),
    new XAttribute("Att2", 2),
    new XElement("Child1", 1),
    new XElement("Child2", "some content")
);
XElement xmlTree2 = new XElement("Root",
    new XAttribute("Att1", 1),
    new XAttribute("Att2", 2),
    new XElement("Child1", 1),
    new XElement("Child2", "some content")
);
XNodeEqualityComparer equalityComparer = new XNodeEqualityComparer();
output.Append(equalityComparer.Equals(xmlTree1, xmlTree2) + Environment.NewLine);
xmlTree2.Add(new XElement("NewChild", "new content"));
output.Append(equalityComparer.Equals(xmlTree1, xmlTree2) + Environment.NewLine);

OutputTextBlock.Text = output.ToString();

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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