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Can someone help me with my problem?
I have 3 labels:

  • 1st Label = Show the down time (No concern)
  • 2nd Label = show the idle time (No concern)
  • 3rd Label = I need the sum of label 1 and label 2

But when I tried to add Label 1 and Label 2, I encountered the error.

Can someone help me with what program I can use? Using VB.NET.

What I have tried:

Private Sub TStop_Tick(sender As Object, e As EventArgs) _
        Handles TStop.Tick
        Label1.Text = aa.ToString("00:") & bb.ToString("00:") & cc.ToString("00")
        cc = cc + 1
        If cc > 59 Then
            cc = 0
            bb = bb + 1
        ElseIf bb > 59 Then
            bb = 0
            aa = aa + 1
        End If

Private Sub TIdle_Tick(sender As Object, e As EventArgs) Handles TIdle.Tick
        Label2.Text = dd.ToString("00:") & ee.ToString("00:") & ff.ToString("00")
        ff = ff + 1
        If ff > 59 Then
            ff = 0
            ee = ee + 1
        ElseIf ee > 59 Then
            ee = 0
            dd = dd + 1
        End If
    End Sub

Dim gg, hh, ii As Double
        gg = Label1.Text
        hh = Label2.Text
        Label3.Text = ii

        Label3.Text = gg + hh
Updated 28-Aug-23 10:37am
Dave Kreskowiak 26-Aug-23 0:52am    
Why do you have time values split into individual variables? A time value should be in a single value to make it easier to work with.

1 solution

The problem is that neither Label1 nor Label2 contain a Double value: They contain a string with your time separated by colons: "12:35:56", or "23:00:00" - and the system will throw an exception if you try to convert that to a Double. Even if it didn't, adding two doubles will not give you what you need as adding 10 seconds to 55 seconds will not give you 1 minute and 5 seconds - it will give you 65 seconds.

To do this, you would need to parse the string into a Timespan and add those:
Dim s as String = aa.ToString("00:") & bb.ToString("00:") & cc.ToString("00")
Dim ts as TimeSpan = TimeSpan.Parse(s)
Dim result as TimeSpan = ts + ts
Share this answer
Marlon Rivera 26-Aug-23 1:54am    
But how can I show the value in the Label3?
OriginalGriff 26-Aug-23 2:43am    
You are kidding, right?
You *really* can't write a trivial line of code on your own?
Label3.Text = result.ToString()

* Sorry about that - the cat walked on the mouse and sent it.
Marlon Rivera 26-Aug-23 4:24am    
Thank you here is my final code:
Dim time1 As TimeSpan = TimeSpan.Parse(Label1.Text)
Dim time2 As TimeSpan = TimeSpan.Parse(Label2.Text)

' Add the time values together
Dim result As TimeSpan = time1.Add(time2)

' Display the result in TextBox3
Label3.Text = result.ToString()
OriginalGriff 26-Aug-23 4:52am    
Why are you using ".Add"? "+" is much clearer and easier to read ...

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