How to check if 2 textbox is empty and if they are, disable a button

Question

1.00/5 (1 vote)

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if I put the code below in Private Sub Form_Load, it doesnt work but if i put the code in ΟνομαTextBox works and in ΚωδικοςTextBox works but only for this textbox i put the code in.

What I have tried:

Private Sub ΟνομαTextBox_TextChanged(sender As Object, e As EventArgs) Handles ΟνομαTextBox.TextChanged
       If ΟνομαTextBox.Text = "" Or ΚωδικοςTextBox.Text = "" Then
           Button2.Enabled = False
       Else
           Button2.Enabled = True
       End If
   End Sub

Posted 12-Feb-17 22:21pm

Member 12997620

Updated 12-Feb-17 23:08pm

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Comments

Richard MacCutchan 13-Feb-17 5:32am

You should have a generic TextChanged method that is called when either TextBox contents are changed.

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Ralf Meier · Accepted Answer · 2017-02-12T23:08:00

Solution 1

You should handle the TextChanged-Ebvent from both Textboxes.
That could be look like :

VB

Private Sub TextBox_TextChanged(sender As Object, e As EventArgs) Handles ΟνομαTextBox.TextChanged , ΚωδικοςTextBox.TextChanged
        If ΟνομαTextBox.Text = "" Or ΚωδικοςTextBox.Text = "" Then
            Button2.Enabled = False
        Else
            Button2.Enabled = True
        End If
    End Sub

Posted 12-Feb-17 23:08pm

Ralf Meier

Updated 15-Feb-17 1:48am

v3

Comments

Richard MacCutchan 13-Feb-17 5:31am

They are Greek letters.

Member 12997620 15-Feb-17 7:04am

if you mean that it doesnt work
Private Sub TextChangedEvent(sender As Object, e As EventArgs)
If TextBox1.Text = "" Or TextBox2.Text = "" Then
Button2.Enabled = False
Else
Button2.Enabled = True
End If
End Sub

Ralf Meier 15-Feb-17 7:47am

No ... I mean that you should catch the TextChanged-Event from BOTH Textboxes to your Method.
Look for the differences between my code to yours ... (I try to mark my changes)

Member 12997620 15-Feb-17 12:50pm

Thank you it works