SatGetXmlAttribute Method

public static string GetXmlAttribute(
	string xmlFile,
	string attributeName,
	string elementName
)

Public Shared Function GetXmlAttribute ( 
	xmlFile As String,
	attributeName As String,
	elementName As String
) As String

Parameters

xmlFile  String

Name of input XML file to be processed (or a string containing XML data)

attributeName  String

Name of attribute

elementName  String

Name of element or xpath expression (see remarks)

Return Value

XPath expression: Alternatively, specify an path expression in elementName using the "/" and "//" operators and optional predicate [N] where N is a positive integer. For example "/Comprobante/Emisor" or "//Concepto[2]//Retencion[3]". This is a simplified form of XPath that selects the first occurrence of the element matching the path expression (whereas XPath would select all matching elements). Path expressions must start with a "/" or "//" and must not end with a "/". No other XPath function or operator is accepted. Do not use namespace prefixes (e.g. "cfdi:") in the path expression.

Simplified Xpath syntax:

• /e1 -- selects the first <e1> document element (child element of the document node).
• /e1/e2 -- selects the first <e2> child element of the first <e1> document element.
• /e1[2]/e2[3] -- selects the third <e2> child element of the second <e1> document element.
• /e1[1]/e2[1] -- same as /e1/e2.
• //e2 -- the first <e2> element found anywhere (same as simple e2).
• //e2[3] -- the third <e2> element found anywhere (same as simple e2[3]).
• /e1//e2 -- the first <e2> element found anywhere inside the <e1> element.

To test for the existence of an element, set attributeName="". This will return the name of the element if it exists, or "!NO MATCH!" if not found. This message can be changed using SetXmlNoMatch(String).

Reference