How to read data with System.Xml.XmlTextReader

theSince in the last post an example of System.Xml.XmlTextWriter was used to write an XML-document this article will show how to read an XML-document.

Private Shared Sub LoadXMLfile(ByVal Path string)
        If My.Computer.FileSystem.FileExists(Path) Then
            Dim rdrXML As New System.Xml.XmlTextReader(Path) //Consturctor with XML file's path
            Try
                rdrXML.MoveToContent()

                Dim ElementName As String = ""
                Dim NextItem As Boolean = True
                Dim objListViewItem As Favoritenobjekt = Nothing
                Do While rdrXML.Read
                    If NextItem Then
                        objListViewItem = New Favoritenobjekt
                        NextItem = False
                    End If
                    Select Case rdrXML.NodeType
                        Case System.Xml.XmlNodeType.Element
                            ElementName = rdrXML.Name
                        Case System.Xml.XmlNodeType.Text
                            If ElementName = "Name" Then
                                objListViewItem.Text = rdrXML.Value
                            End If
                            If ElementName = "Kategorie" Then
                                objListViewItem.Kategorie = rdrXML.Value
                            End If
                            If ElementName = "URL" Then
                                objListViewItem.URL = rdrXML.Value
                                Favoriten_Liste.Add(objListViewItem)
                                NextItem = True
                            End If
                    End Select
                Loop
                rdrXML.Close()
                rdrXML = Nothing
            Catch ex As System.Exception
                MsgBox("Error. Xmlfile could not be loaded", MsgBoxStyle.Critical)
            End Try
        End If
    End Sub

What is important in the code?

The XMLTextReader is constucted with the path to the file which you are trying to read. rsrXMl.MoveToContent Points the Reader to the Data.  Since you do not know how much information is in the file you have to use a while loop. Important in this way of reading the data is that we are first reading an node then, we check if it is an Element or Text. The Elementname is stored in 'Elementname' which is needed to identify the element the Text (case 2) belongs to.