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7.0

Object Reference fault

Asked by steensommer in Microsoft Visual Basic.Net

Tags: refer

Hi

Visual Basic .net (express edition) windows application.

Sometime when running the following code I get this message:

"Object reference not set to an instance of an object"

The fault is probably somewhere in the start because when it runs smoothly the Messagebox is displayed but not when the fault appears.

The Code:
        Dim sPath As String = "\\server\faelles\Index Data\Patientmapper\"
        With CheckList1
            .Add(TextBox1)
            .Add(TextBox2)
            .Add(TextBox4)
            .Add(TextBox3)
            .Add(TextBox9)
            .Add(TextBox12)
            .Add(TextBox21)
            .Add(TextBox29)
            .Add(TextBox25)
            .Add(TextBox26)
            .Add(TextBox33)
            .Add(TextBox31)
            .Add(TextBox39)
            .Add(TextBox37)
            .Add(TextBox45)
            .Add(TextBox53)
            .Add(TextBox49)
            .Add(TextBox50)
            .Add(TextBox57)
            .Add(TextBox55)
            .Add(TextBox63)
            .Add(TextBox71)
            .Add(TextBox67)
            .Add(TextBox68)
        End With

        If xlApp.Workbooks.Count > 0 Then
            MessageBox.Show("Kun patientlisten må være åben!")

        Else

            Try

                Dim Msg As String, Style As String, Title As String, Response As String
                Msg = "Skal alle medicinlister udprintes?"    ' Define message.
                Style = vbYesNo + vbDefaultButton2     ' Define buttons.
                Title = "Meddelelsesbox"    ' Define title.
                Response = MsgBox(Msg, Style, Title)
                If Response = vbYes Then

                    SuspendLayout()
                    Dim Dag As String
                    Dim i As Integer
                    For i = 0 To CheckList1.Count - 1
                        Dim tb2 As TextBox = CType(CheckList1(i), TextBox)

                        If tb2.Text = TextBox1.Text Then
                            Cpr = TextBox73.Text
                            Dag = TextBox118.Text
                        ElseIf tb2.Text = TextBox2.Text Then
                            Cpr = TextBox74.Text
                            Dag = TextBox119.Text
                        ElseIf tb2.Text = TextBox4.Text Then
                            Cpr = TextBox76.Text
                            Dag = TextBox121.Text
                        ElseIf tb2.Text = TextBox3.Text Then
                            Cpr = TextBox75.Text
                            Dag = TextBox120.Text
                        ElseIf tb2.Text = TextBox9.Text Then
                            Cpr = TextBox95.Text
                            Dag = TextBox117.Text
                        ElseIf tb2.Text = TextBox12.Text Then
                            Cpr = TextBox96.Text
                            Dag = TextBox116.Text
                        ElseIf tb2.Text = TextBox21.Text Then
                            Cpr = TextBox77.Text
                            Dag = TextBox112.Text
                        ElseIf tb2.Text = TextBox29.Text Then
                            Cpr = TextBox78.Text
                            Dag = TextBox113.Text
                        ElseIf tb2.Text = TextBox25.Text Then
                            Cpr = TextBox80.Text
                            Dag = TextBox115.Text
                        ElseIf tb2.Text = TextBox26.Text Then
                            Cpr = TextBox79.Text
                            Dag = TextBox114.Text
                        ElseIf tb2.Text = TextBox33.Text Then
                            Cpr = TextBox94.Text
                            Dag = TextBox111.Text
                        ElseIf tb2.Text = TextBox31.Text Then
                            Cpr = TextBox97.Text
                            Dag = TextBox110.Text
                        ElseIf tb2.Text = TextBox39.Text Then
                            Cpr = TextBox92.Text
                            Dag = TextBox109.Text
                        ElseIf tb2.Text = TextBox37.Text Then
                            Cpr = TextBox91.Text
                            Dag = TextBox108.Text
                        ElseIf tb2.Text = TextBox45.Text Then
                            Cpr = TextBox81.Text
                            Dag = TextBox104.Text
                        ElseIf tb2.Text = TextBox53.Text Then
                            Cpr = TextBox82.Text
                            Dag = TextBox105.Text
                        ElseIf tb2.Text = TextBox49.Text Then
                            Cpr = TextBox84.Text
                            Dag = TextBox107.Text
                        ElseIf tb2.Text = TextBox50.Text Then
                            Cpr = TextBox83.Text
                            Dag = TextBox106.Text
                        ElseIf tb2.Text = TextBox57.Text Then
                            Cpr = TextBox90.Text
                            Dag = TextBox103.Text
                        ElseIf tb2.Text = TextBox55.Text Then
                            Cpr = TextBox89.Text
                            Dag = TextBox102.Text
                        ElseIf tb2.Text = TextBox63.Text Then
                            Cpr = TextBox85.Text
                            Dag = TextBox99.Text
                        ElseIf tb2.Text = TextBox71.Text Then
                            Cpr = TextBox86.Text
                            Dag = TextBox98.Text
                        ElseIf tb2.Text = TextBox67.Text Then
                            Cpr = TextBox88.Text
                            Dag = TextBox101.Text
                        Else
                            Cpr = TextBox87.Text
                            Dag = TextBox100.Text
                        End If

                        If tb2.Text <> "" And Microsoft.VisualBasic.Left(i, 1) <> "R" And Microsoft.VisualBasic.Left(i, 1) <> "P" And Dag > "-1" Then
                            xlApp.Workbooks.Open(sPath & Cpr & ".opr")
                            With xlApp.ActiveWorkbook
                                .Sheets("Medicin").Activate()
                                .ActiveSheet.PrintOut(Copies:=1, Collate:=True)
                                .Close(False)
                            End With
                        ElseIf tb2.Text <> "" And Microsoft.VisualBasic.Left(i, 1) <> "R" And Microsoft.VisualBasic.Left(i, 1) <> "P" And Dag = "-1" Then
                            xlApp.Workbooks.Open(sPath & Cpr & ".opr")
                            With xlApp.ActiveWorkbook
                                .Sheets("Stamkort").Activate()
                                .ActiveSheet.PrintOut(Copies:=1, Collate:=True)
                                .Close(False)
                            End With
                        End If

                    Next i
                    ResumeLayout()
                End If

            Catch oexpData As OleDb.OleDbException
                MsgBox(oexpData.Message)
            End Try

        End If


[+][-]07/03/06 12:19 PM, ID: 17033088Expert Comment

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About this solution

Zone: Microsoft Visual Basic.Net
Tags: refer
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Solution Provided By: bruintje
Participating Experts: 1
Solution Grade: A
 
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