XML - Write Node

This custom action lets you set the text content of an existing XML node, or create a new node.

This custom action has two different behaviors, depending on whether Name is set or not.

• If you leave Name blank, the node whose XPath is defined by PathToNode will have its text set to the contents specified with “Value”. The node must exist.

• If you set Name, a new node with this name is created. The node parent is defined by PathToNode. The node text is also set to the contents specified with “Value”.

Property Name	Data Type	Description
IDXML	TXMLID	A unique string identifier associated to the opened XML resource you want to write data to.
Name	String	Name of the node. Optional: see above
PathToNode	XPath	XPath expression to the parent node (if you create a new XML node) or to the existing node (if you want to change its text content).
Value	String	This is the text you want to assign to the node. You can use variables such as %DESTPATH%.

• Update mode (Name is blank): If the XPath expression does not match any existing node (for example, if the parent element is self-closing like <System /> instead of <System><Backuppath>value</Backuppath></System>), the write operation is silently skipped — no error occurs and no node is created.

• Create mode (Name is set): If the parent node specified by PathToNode does not exist, the new child node is not created.

Use of XPath is explained at http://msdn.microsoft.com/en-us/library/ms256086.aspx