CODEWITHSUNDEEP
vb.netcombobox
f1wade
f1wade

Reputation: 2967

how to tell if user caused selectedindexchanged

I have a SelectedIndexChanged event firing when the index in a combobox changes.

I call this from code in a timer, and the user calls it when they select an option.

I cannot figure out how to tell if it was a user action that caused this event to fire or some other event.

I have tried a flag in my timer, which does work but i was looking for a more open solution, that would be more future proof.

Upvotes: 1

Views: 191

Answers (2)

f1wade
f1wade

Reputation: 2967

I have fixed this by adding event selectionchangecommitted

Private Sub cboGraphType_SelectionChangeCommitted(sender As Object, e As EventArgs) Handles cboGraphType.SelectionChangeCommitted
    startStopTimer(True)
End Sub

this then stops the timer, and then the selectionchanged event still fires after this.

but this event stop my timer, which is what i wanted.

Upvotes: 1

matzone
matzone

Reputation: 5719

About use any flag ...

Dim ByWhat As String 

Private Sub timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles timer1.Tick
    ByWhat = "TIMER1"
    MyJob()       
End Sub

Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged

    ByWhat = "COMBOBOX1"
    MyJob()

End Sub

Sub MyJob()

  Select Case ByWhat
  Case "TIMER1"
    'code if called by timer1

  Case "COMBOBOX1"
    'code if called by combobox1

  End Select 

  ByWhat = "" '---->Clear it
End Sub

Upvotes: 0

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