Partager via

  • Article

XNodeEqualityComparer.GetHashCode Method (XNode)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Returns a hash code based on an XNode.

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

Syntax

'Declaration
Public Function GetHashCode ( _
    obj As XNode _
) As Integer

public int GetHashCode(
    XNode obj
)

Parameters

Return Value

Type: System.Int32
A Int32 that contains a value-based hash code for the node.

Implements

IEqualityComparer<T>.GetHashCode(T)

Remarks

The XNode implementation of GetHashCode is based on the referential identity of the node. This method computes a deep hash code based on the value of the node and all descendants. The hash code reflects all attributes and all descendent nodes.

Examples

The following example uses this method to get a deep hash code for an XML tree.

StringBuilder output = new StringBuilder();
XElement xmlTree = 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("HashCode: " + equalityComparer.GetHashCode(xmlTree).ToString("X") + Environment.NewLine);
xmlTree.Add(new XElement("NewChild", "new content"));
output.Append("HashCode: " + equalityComparer.GetHashCode(xmlTree).ToString("X") + 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.