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Former Member
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I created the following procedure a while ago, and decided to share it, because I'm fairly proud of it. I wrote it to grab the user's default font settings from the SAP configuration file, but I think it could be used to parse virtually any XML file and extract just the information that we need from it.

''' <summary>
''' Searches within an XML file, through specific elements, for a specific attribute that has a specific value.
''' If we find the attribute that has a specific value that we desire, then we return the text value of that node
''' </summary>
''' <param name="sInputFile">Input file name</param>
''' <param name="sElementsToSearch">String of the element tags that we want to search through</param>
''' <param name="sAttributeToSearchFor">String of the name of the attribute that the element must contain</param>
''' <param name="sAttrValToSearchFor">String of the value of the attribute that the element must contain</param>
''' <returns>Returns the sought after value on success, Nothing on failure</returns>
''' <remarks></remarks>
Private Function searchXMLFile(ByVal sInputFile As String, ByVal sElementsToSearch As String, ByVal sAttributeToSearchFor As String, ByVal sAttrValToSearchFor As String) As String
        Dim xmlReader As XmlTextReader = New XmlTextReader(sInputFile)
        Dim blnFoundAttribute As Boolean = False

        'Continue while there's something to read
        Do While (xmlReader.Read())

            'Determine what aspect of a node this is
            Select Case xmlReader.NodeType

                Case XmlNodeType.Element
                    'The beginning tag of an element

                    'Skip the element if it's not one of the elements that we want to search in
                    If xmlReader.Name.IndexOf(sElementsToSearch) = -1 Then
                        Continue Do
                    End If

                    If xmlReader.HasAttributes Then 'If attributes exist

                        'Enumerate through all of the attributes, one by one until we find the desired attribute
                        While xmlReader.MoveToNextAttribute() AndAlso Not blnFoundAttribute

                            'This queries the "name" of the attribute
                            If xmlReader.Name.IndexOf(sAttributeToSearchFor) = -1 Then
                                Continue While
                                'Check the "value" of the attribute and ensure that it matches what we're looking for
                                If xmlReader.Value.IndexOf(sAttrValToSearchFor) = -1 Then
                                    Continue While
                                    blnFoundAttribute = True
                                    Exit While
                                End If
                            End If
                        End While
                    End If
                Case XmlNodeType.Text
                    'The text value within an element

                    'If we found the attribute that we were searching for, then this value must be the value that we want to return
                    If blnFoundAttribute Then
                        Return xmlReader.Value
                    End If

                Case XmlNodeType.EndElement 'Display the end of the element
                    'The end tag of the element
            End Select

        'If we got here, then we didn't find what we are looking for, return nothing
        Return Nothing

    Catch ex As Exception
        MsgBox("Error in procedure " & System.Reflection.MethodInfo.GetCurrentMethod.Name.ToString & ": " & ex.Message.ToString)
        Return Nothing
    End Try
End Function

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