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.
Assembly: System.Xml.Linq (in System.Xml.Linq.dll)
Property Value
Type: System.Xml.Linq.XAttributeAn 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()