Read XML File
Example in visual basic of XML reader
Here is and example of code to read a very basic XML file. It uses XmlTextReader to circle over each XML elements. This code also uses XmlNodeType to differentiate the type of information inside the XML file.
The code is simple and has basic security precaution. It checks if the file exist. I also use Fileinfo to keep the filename instead of a regular string. With the Fileinfo object, I could have the file size and other useful information in case something goes wrong in the reading.
Download the sample project here: XMLReaderSample.zip
Imports System.Xml ''' <summary> ''' This is a sample, very basic, reads XML file. ''' ''' Author : Check-Kay Wong ''' ''' </summary> ''' <remarks></remarks> Public Class Form1 Private Sub OpenToolStripMenuItem_Click(sender As System.Object, e As System.EventArgs) Handles OpenToolStripMenuItem.Click OpenXML() End Sub ''' <summary> ''' Simple XML reader ''' </summary> ''' <remarks></remarks> Private Sub OpenXML() Dim oXmlTextReader As XmlTextReader 'need to Imports System.Xml Dim oFileInfo As IO.FileInfo = Nothing Try 'get a XML file Using oOpenFileDialog As New OpenFileDialog oOpenFileDialog.Filter = "xml file|*.xml|All files|*.*" oOpenFileDialog.Multiselect = False If oOpenFileDialog.ShowDialog = Windows.Forms.DialogResult.OK Then If IO.File.Exists(oOpenFileDialog.FileName) Then oFileInfo = New IO.FileInfo(oOpenFileDialog.FileName) 'sPath = oOpenFileDialog.FileName End If End If End Using 'read the XML file If oFileInfo IsNot Nothing Then If IO.File.Exists(oFileInfo.FullName) Then oXmlTextReader = New XmlTextReader(oFileInfo.FullName) While oXmlTextReader.Read Select Case oXmlTextReader.NodeType Case XmlNodeType.Element MsgBox(oXmlTextReader.Name) Case XmlNodeType.Text MsgBox(oXmlTextReader.Value) Case XmlNodeType.EndElement MsgBox(oXmlTextReader.Name) End Select End While End If End If Catch ex As Exception End Try End Sub End Class |
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