PreviousAttribute Property
Collapse the table of content
Expand the table of content

XAttribute.PreviousAttribute Property

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Gets the previous attribute of the parent element.

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

'Declaration
Public ReadOnly Property PreviousAttribute As XAttribute

Property Value

Type: System.Xml.Linq.XAttribute
An XAttribute containing the previous attribute of the parent element.

Attributes are maintained in the XML tree in the order that they were added to the element. When a collection of attributes is returned by Attributes, they are returned in the order that they were added, and are not sorted. When you request the previous attribute through this property, this property returns the attribute that was added before this attribute.

If this attribute does not have a parent, or if this attribute is the first attribute, then this property returns Nothing.

The XElement class stores its attributes as a singly-linked list of XAttribute objects. This means that the PreviousAttribute property must traverse the list of attributes that belong to the element. Therefore, using this property might affect your performance.

The following example shows how to iterate through the attributes of an element using this property.


Dim output As New StringBuilder
Dim root As XElement = <Root Att1="1" Att2="2" Att3="3" Att4="4"/>
Dim att As XAttribute = root.LastAttribute
Dim val As Boolean = True
Do
    output.Append(att)
    output.Append(Environment.NewLine)
    att = att.PreviousAttribute
Loop While (Not (att Is Nothing))

OutputTextBlock.Text = output.ToString()


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

Show:
© 2017 Microsoft