Jump between loops

Hi all I'm in need of some help which I'm sure is very easy (but not to me). I need to read 2 text files and act on them independently. The first file is acted upon and data is sent to the top half of a form the second needs to be acted upon and sent to the bottom half text boxes etc.

So my for loop can read the first text file and deal with the data but how do I (at the same time) read the second file and act on that line by line.

By the way the form is real time Information which has time data and location data from 2 different sources and therefore can't be read one at a time.

If you need any of the For Loop code I will post it but basically

For Second Run of loop
Read Text File A Read Text File A
Line 1 of A Line 2 Of A
Handle A Data Handle A Data
Read Text File B Read Text File B
Read Text File B Read Text File B
Line 1 of B Line 2 of B
Handle B Data Handle B Data
Loop Loop

Hello
Maybe you should post your code. I am a bit confused. That being said. Won't using two loops work? One for TEXTFILE A and one for TEXTFILE B?

George

Hi George the For loop is a tad long if I run a loop TEXTFILE A Line A I then need to jump out and read TEXTFILE B Line A then back to TEXTFILE A and so on as they are GPS timed lines and the data needs to be handled for each file separately

Just noticed what I typed earlier it didn't pan out as I typed it
Read text file A
Read Text File B
For each line in FileA
line of A
Handle data
Jump to File B Loop read line of file B
Next
For each line in FileB
line of B
Handle data
Jump to File A Loop read Next Line of File
Next

Does this make any sense ?

Code:

---

Open FileA
Open FileB

Start looping
    Read from FileA
    Do something
    Read from FileB
    Do something with that
keep looping until the end of FileA or FileB

Close FileA
Close FileB

---

Seems pretty straight forward to me... same basic structure you posted... sooooo...... ?????????

-tg

Ok so here is my 2 For loops which I need to run at the same time Merge them somehow

Code:

---

  For Each line1 As String In File.ReadLines(LocalFileName)

            If MyLocalExit = False Then
                If Pause = False Then
                    If line1.Contains("$GPRMC") Then
                        Dim valueLine() As String = line1.Split(",")
                        '  MsgBox(valueLine(7))
                        LocalMapLat = valueLine(7).Substring(0, 2) & "°"
                        LocalMapLat = LocalMapLat & valueLine(7).Substring(2) & """"
                        LocalMapLat = LocalMapLat & valueLine(8)
                        LocalMapLatMinutes = (CSng(Mid(valueLine(7), 3, 7)) / 60)
                        LocalMapsngLatitude = CSng(VB.Left(valueLine(7), 2)) + LocalMapLatMinutes
                        LocalMapLat = CStr(LocalMapsngLatitude)
                        LocalMapLatDecimal = CDbl(Val(LocalMapsngLatitude))
                        LocalMapLng = valueLine(9).Substring(0, 3) & "°"
                        LocalMapLng = LocalMapLng & valueLine(9).Substring(3) & """"
                        LocalMapLng = LocalMapLng & valueLine(10)
                        LocalMapLngMinutes = (CSng(Mid(valueLine(9), 4, 7)) / 60)
                        LocalMapsngLongitude = CSng(VB.Left(valueLine(9), 3)) + LocalMapLngMinutes
                        LocalMapLng = CStr(LocalMapsngLongitude)
                        LocalMapLngDecimal = CDbl(Val(LocalMapsngLongitude))
                        Dim MyLocalDate = valueLine(1).Substring(0, 10)
                        TextBox4.Text = MyLocalDate
                        Dim MyLocalTime = valueLine(2).Substring(0, 12)
                        TextBox5.Text = MyLocalTime
                        LocalMapsngLongitude = (LocalMapsngLongitude * -1)
                        tLoc = tMap.GetLocation(LocalMapLatDecimal, LocalMapLngDecimal, 0.0)
                        tLoc.GoTo()
                        TextBox2.Text = ("Latitude " & LocalMapsngLatitude & " Longitude " & LocalMapsngLongitude)
                        Car = tMap.AddPushpin(tLoc)
                        Car.Symbol = 30
                        Car.BalloonState = GeoBalloonState.geoDisplayNone
                        Wait(100)
                    End If
                    If line1.Contains("Score") Then
                        ScoreCCount = ScoreCCount + 1
                        TextBox9.Text = ScoreCCount
                        Dim valueLine() As String = line1.Split(",")
                        Dim Score = valueLine(4).Substring(35, 4)
                        Dim OffSet = valueLine(5).Substring(0, 32)
                        TextBox3.Text = (OffSet)
                        Dim MyScore = valueLine(4).Substring(11, 28)
                        TextBox6.Text = MyScore
                        Dim ScoreFail = valueLine(4).Substring(35, 5)
                        If ScoreFail <= 2.499 Then
                            ScoreFailCount = ScoreFailCount + 1
                            TextBox11.Text = ScoreFailCount
                            I = I + 1
                            result = (ScoreFailCount / I) * 100
                            TextBox10.Text = result & (" %")
                        End If
                        If ScoreFail >= 2.5 Then
                            I = I + 1
                            result = (ScoreFailCount / I) * 100
                            TextBox10.Text = result & (" %")
                        End If
                        tLoc = tMap.GetLocation(LocalMapLatDecimal, LocalMapLngDecimal, 0.0)
                        tLoc.GoTo()
                        If Score < 2.5 Then
                            Smiley = tMap.AddPushpin(tLoc)
                            Smiley.Symbol = 65
                            Smiley.BalloonState = GeoBalloonState.geoDisplayNone
                        Else
                            Smiley = tMap.AddPushpin(tLoc)
                            Smiley.Symbol = 70
                            Smiley.BalloonState = GeoBalloonState.geoDisplayNone
                        End If
                        Smiley.Note = "Score " & Score
                        If CheckBox2.Checked = True Then
                            Smiley.BalloonState = GeoBalloonState.geoDisplayBalloon
                        Else
                            Smiley.BalloonState = GeoBalloonState.geoDisplayNone
                        End If
                    End If
                    If line1.Contains("HW On") Then
                        OvalShape1.BackColor = Color.Red
                    ElseIf line1.Contains("HW Off") Then
                        OvalShape1.BackColor = Color.Lime
                    End If
                    If line1.Contains("BEGIN") Then
                        OvalShape2.BackColor = Color.Yellow
                    ElseIf line1.Contains("END") Then
                        OvalShape2.BackColor = Color.Lime
                    End If
                    Dim MyWait As Integer
                    MyWait = ComboBox1.SelectedItem
                    Wait(MyWait)
                    ' System.Threading.Thread.Sleep(1000)
                    System.Windows.Forms.Application.DoEvents()
                    If line1.Contains("Com") Then
                        Dim valueLine() As String = line1.Split(",")
                        Dim ComPort = valueLine(0).Substring(14, 2)
                        TextBox7.Text = ComPort
                    End If
                    If line1.Contains("HW") Then
                        Dim valueLine() As String = line1.Split(",")
                        Dim RADPort = valueLine(0).Substring(14, 2)
                        TextBox8.Text = HWPort
                    End If
                End If
            End If
        Next line1
               
        System.Threading.Thread.Sleep(1000)
        System.Windows.Forms.Application.DoEvents()
               
        For Each line2 As String In File.ReadLines(DistantFileName)
            If MyDistantExit = False Then
                If Pause = False Then
                    If line2.Contains("$GPRMC") Then
                        Dim valueLine() As String = line2.Split(",")
                        '  MsgBox(valueLine(7))
                        DistantMapLat = valueLine(7).Substring(0, 2) & "°"
                        DistantMapLat = DistantMapLat & valueLine(7).Substring(2) & """"
                        DistantMapLat = DistantMapLat & valueLine(8)
                        DistantMapLatMinutes = (CSng(Mid(valueLine(7), 3, 7)) / 60)
                        DistantMapsngLatitude = CSng(VB.Left(valueLine(7), 2)) + DistantMapLatMinutes
                        DistantMapLat = CStr(DistantMapsngLatitude)
                        DistantMapLatDecimal = CDbl(Val(DistantMapsngLatitude))
                        DistantMapLng = valueLine(9).Substring(0, 3) & "°"
                        DistantMapLng = DistantMapLng & valueLine(9).Substring(3) & """"
                        DistantMapLng = DistantMapLng & valueLine(10)
                        DistantMapLngMinutes = (CSng(Mid(valueLine(9), 4, 7)) / 60)
                        DistantMapsngLongitude = CSng(VB.Left(valueLine(9), 3)) + DistantMapLngMinutes
                        DistantMapLng = CStr(DistantMapsngLongitude)
                        DistantMapLngDecimal = CDbl(Val(DistantMapsngLongitude))
                        Dim MyDistantDate = valueLine(1).Substring(0, 10)
                        TextBox17.Text = MyDistantDate
                        Dim MyDistantTime = valueLine(2).Substring(0, 12)
                        TextBox16.Text = MyDistantTime
                        Wait(100)
                        DistantMapsngLongitude = (DistantMapsngLongitude * -1)
                        TextBox14.Text = ("Latitude " & DistantMapsngLatitude & " Longitude " & DistantMapsngLongitude)
                    End If
                    If line2.Contains("Score") Then
                        ScoreCCount = ScoreCCount + 1
                        TextBox22.Text = ScoreCCount
                        Dim valueLine() As String = line2.Split(",")
                        Dim Score = valueLine(4).Substring(35, 4)
                        Dim OffSet = valueLine(5).Substring(0, 32)
                        TextBox18.Text = (OffSet)
                        Dim MyScore = valueLine(4).Substring(11, 28)
                        TextBox15.Text = MyScore
                        Dim ScoreFail = valueLine(4).Substring(35, 5)
                        If ScoreFail <= 2.499 Then
                            ScoreFailCount = ScoreFailCount + 1
                            TextBox20.Text = ScoreFailCount
                            I = I + 1
                            result = (ScoreFailCount / I) * 100
                            TextBox21.Text = result & (" %")
                        End If
                        If ScoreFail >= 2.5 Then
                            I = I + 1
                            result = (ScoreFailCount / I) * 100
                            TextBox21.Text = result & (" %")
                        End If
                    End If
                    If line2.Contains("HW On") Then
                        OvalShape4.BackColor = Color.Red
                    ElseIf line2.Contains("HW Off") Then
                        OvalShape4.BackColor = Color.Lime
                    End If
                    If line2.Contains("BEGIN") Then
                        OvalShape3.BackColor = Color.Yellow
                    ElseIf line2.Contains("END") Then
                        OvalShape3.BackColor = Color.Lime
                    End If
                    System.Windows.Forms.Application.DoEvents()
                    If line2.Contains("Com") Then
                        Dim valueLine() As String = line2.Split(",")
                        Dim ComPort = valueLine(0).Substring(14, 2)
                        TextBox19.Text = ComPort
                    End If
                End If
            End If

        Next line2

---

Let me see if I understand what you want. Your code's one big chunk, so I could've missed what's going on.

It looks like you want to search two different files for some data. The data may be in either file, and you aren't really sure which one it is. As soon as the data is found in either file, you want to do some things and stop searching?

At a high level, that is not hard. Starting two asynchronous tasks with cancellation has several patterns. But the way your code is currently structured, it needs a lot of work to get there. You update a lot of controls in response to this data, and that's dangerous when multiple threads are involved.

So I would restructure it as an asynchronous function that returns some data, then update the UI based on that data. That way you can make the searching, which is probably the part that takes a long time, happen asynchronously and do the relatively quick updates on the UI thread in response. The newer task-based APIs would be super convenient for this, but aren't quite as well-supported in VS 2010. You should consider upgrading to VS 2013 (my favorite) or VS 2015, unless you have a strong technical reason to use VS 2010.

Now, if you really want both to run at the same time, just be allowed to finish at different times, you still need to do the same thing. Other threads cannot update the UI, and things would get messy if they could. If you make the changes discussed above, you won't have that problem.

So let's make sure we understand the question first, because coordinating multiple threads is always a little tricky. I don't want to write a lot of example code and explanation about the wrong thing.

Ok may have not explained very well

It looks like you want to search two different files for some data. The data may be in either file and you aren't really sure which one it is, Yes I do know the first loop refers to the data in the first file the second loop refers to the data in the second file. As soon as the data is found in either file, you want to do some things and stop searching?no I stop at the end of the file its a time sequence of events

At a high level, that is not hard. Starting two asynchronous tasks with cancellation has several patterns. But the way your code is currently structured, it needs a lot of work to get there. You update a lot of controls in response to this data, and that's dangerous when multiple threads are involved. This is because it is mapping a vehicle with lat long positions so they change every few lines

So I would restructure it as an asynchronous function that returns some data, then update the UI based on that data. That way you can make the searching, which is probably the part that takes a long time, happen asynchronously and do the relatively quick updates on the UI thread in response. The newer task-based APIs would be super convenient for this, but aren't quite as well-supported in VS 2010. You should consider upgrading to VS 2013 (my favorite) or VS 2015, unless you have a strong technical reason to use VS 2010.

Now, if you really want both to run at the same time, just be allowed to finish at different times, you still need to do the same thing. Other threads cannot update the UI, and things would get messy if they could. If you make the changes discussed above, you won't have that problem.

So let's make sure we understand the question first, because coordinating multiple threads is always a little tricky. I don't want to write a lot of example code and explanation about the wrong thing.

Well basically what you are asking is just not correct. You can not jump in an out of loops back and forth nor do you need to. Post #4 seems to show the structure you need.

OK. Interesting. It sounds like you are in the case techgnome talked about in #4. You could use multiple threads, but I think the costs of coordinating those threads are worse than the simplicity of Techgnome's approach.

Just to clarify, this is what you want, right?

Code:

---

* Read from file A.
* Update the UI.
* Read from file B.
* Update the UI.
* Repeat until all data has been read.

---

I can only help with general algorithms in this topic, for contractual reasons I'd rather not discuss.