Imports System.Net
Imports System.IO
Imports System.Text.RegularExpressions
Imports System.Text
Imports System.Web
Imports System

Public Class Form1
    Private meinRegex As New Regex("<.*?model=""(\d*)"".*?dimension=""(\d*)"".*?></object>", RegexOptions.Multiline)

    Dim curStatus As String = "-"
    Dim integerwert As Integer = 0

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click





        ListBox1.Items.Clear()
        ListBox2.Items.Clear()
        Dim t As New OpenFileDialog
        If t.ShowDialog = vbOK Then
            Dim pfad As String = t.FileName
            Dim mytext As String = My.Computer.FileSystem.ReadAllText(pfad)
            Dim myTextList = mytext.Split(vbNewLine)
            For Each line In myTextList
                ListBox1.Items.Add(line)
                ListBox2.Items.Add(line)
            Next
        End If
    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        RadioButton2.Select()
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

        Try
            Dim ntext As Integer = CInt(TextBox1.Text)
            Try
                integerwert = CInt(TextBox2.Text)
            Catch ex2 As Exception
                Return
            End Try
        Catch ex As Exception
            Return

        End Try

        If RadioButton1.Checked = True Then
            curStatus = "+"
        Else
            curStatus = "-"
        End If
        Dim mydex As Integer = 0
        Dim groups1 As GroupCollection

        For Each item In ListBox1.Items
            mydex += 1
            ' Hier abfragen
            Dim MC1 As MatchCollection = meinRegex.Matches(item)




            If MC1.Count > 0 Then
                For Each items As Match In MC1

                    groups1 = items.Groups
                    Dim sell As Integer = groups1.Count()
                    If (groups1.Item(1).Value()) = TextBox1.Text Then
                        Dim curDIm As Integer = CInt(groups1.Item(2).Value())
                        If curStatus = "-" Then
                            Dim newvalue As Integer = (curDIm - integerwert)
                            'ListBox2.Items.RemoveAt(mydex)
                            'ListBox2.Items.Add(groups1.Item(0).Value.Replace("dimension=""" & curDIm & """", "dimension=""" & newvalue & """"))
                            ListBox2.Items.Item(mydex) = groups1.Item(0).Value.Replace("dimension=""" & curDIm & """", "dimension=""" & newvalue & """")
                        Else
                            Dim newvalue As Integer = (curDIm + integerwert)
                            'ListBox2.Items.RemoveAt(mydex)
                            ListBox2.Items.Item(mydex) = groups1.Item(0).Value.Replace("dimension=""" & curDIm & """", "dimension=""" & newvalue & """")
                            'ListBox2.Items.Add(groups1.Item(0).Value.Replace("dimension=""" & curDIm & """", "dimension=""" & newvalue & """"))
                        End If
                    End If

                Next
            End If
        Next
    End Sub

    Private Sub ListBox2_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ListBox2.SelectedIndexChanged
        Try
            TextBox3.Text = ListBox2.SelectedItem.ToString
        Catch ex As Exception

        End Try
    End Sub
End Class