Why does TextBox's validating not work when using DateTimePicker?

[fts2012@gmail.com]

' if the textbox is empty show an error message 1001
Private Sub TextBox1_Valida ting(ByVal sender As System.Object,
ByVal e As System.Componen tModel.CancelEv entArgs) Handles
TextBox1.Valida ting
TextBox1.BackCo lor = Color.White
If TextBox1.Text.L ength = 0 Then
TextBox1.Select ()
TextBox1.BackCo lor = Color.Yellow
MsgBox("1001")
e.Cancel = True
End If
End Sub

but if I click the DateTimePicker, the message "1001" will be
displayed twice, and then as long as I click the left mouse , it will
be showed twice.
Can anybody tell me how to deal with it ?
Thanks .

[=?Utf-8?B?a2FyaW0=?=]

RE: Why does TextBox's validating not work when using DateTimePicker?

Hello, from what I see in you code, I think you need to use (Else) if you
don't want the msg (1001) to come up. but the way you have it now the msg
will come up every time you click your txt box. see if this will work...
TextBox1.Valida ting

TextBox1.BackCo lor = Color.White
If TextBox1.Text.L ength = 0 Then
TextBox1.Select ()

else

TextBox1.BackCo lor = Color.Yellow
MsgBox("1001")
e.Cancel = True
End If

Hope this helps...

[Family Tree Mike]

Re: Why does TextBox's validating not work when using DateTimePicker?

What is the connection between the textbox1 and datetimepicker? Is the
datetimepicker setting the text in the textbox when you change the date?

<fts2012@gmail. comwrote in message
news:bfc3ac1e-e62c-460a-b2ef-3bf38a8d6c2f@l3 3g2000pri.googl egroups.com...

>
' if the textbox is empty show an error message 1001
Private Sub TextBox1_Valida ting(ByVal sender As System.Object,
ByVal e As System.Componen tModel.CancelEv entArgs) Handles
TextBox1.Valida ting
TextBox1.BackCo lor = Color.White
If TextBox1.Text.L ength = 0 Then
TextBox1.Select ()
TextBox1.BackCo lor = Color.Yellow
MsgBox("1001")
e.Cancel = True
End If
End Sub
>
but if I click the DateTimePicker, the message "1001" will be
displayed twice, and then as long as I click the left mouse , it will
be showed twice.
Can anybody tell me how to deal with it ?
Thanks .

[fts2012@gmail.com]

Re: Why does TextBox's validating not work when using DateTimePicker?

On Oct 14, 3:04 pm, karim <ka...@discussi ons.microsoft.c omwrote:

Hello, from what I see in you code, I think you need to use (Else) if you
don't want the msg (1001)to comeup. but the way you have it now themsg
will come up every time you click your txt box. see if this will work...
TextBox1.Valida ting        TextBox1.BackCo lor = Color.White

        If TextBox1.Text.L ength = 0 Then
            TextBox1.Select ()

            else

            TextBox1.BackCo lor = Color.Yellow
            MsgBox("1001")
            e.Cancel = True
        End If

>
Hope this helps...

Thanks.
This problem was solved.
It was caused by the "TextBox1.selec t()".
code as bellow will be right.
Private Sub TextBox1_Valida ting(ByVal sender As System.Object,
ByVal e As System.Componen tModel.CancelEv entArgs) Handles
TextBox1.Valida ting
TextBox1.BackCo lor = Color.White
If TextBox1.Text.L ength = 0 Then
' TextBox1.Select ()
TextBox1.BackCo lor = Color.Yellow
MsgBox("1001")
e.Cancel = True
End If
End Sub

[fts2012@gmail.com]

Re: Why does TextBox's validating not work when using DateTimePicker?

On Oct 15, 2:16 am, "Family Tree Mike"
<FamilyTreeM... @ThisOldHouse.c omwrote:

What is the connection between the textbox1 and datetimepicker?  Is the
datetimepickers ettingthe text in thetextbox when youchangethe date?
>
<fts2...@gmail. comwrote in message
>
news:bfc3ac1e-e62c-460a-b2ef-3bf38a8d6c2f@l3 3g2000pri.googl egroups.com...
>
>
>

   ' if the textbox is empty show an error message 1001
   Private Sub TextBox1_Valida ting(ByVal sender As System.Object,
ByVal e As System.Componen tModel.CancelEv entArgs) Handles
TextBox1.Valida ting
       TextBox1.BackCo lor = Color.White
       If TextBox1.Text.L ength = 0 Then
           TextBox1.Select ()
           TextBox1.BackCo lor = Color.Yellow
           MsgBox("1001")
           e.Cancel = True
       End If
   End Sub

>

but if I click the DateTimePicker, the message "1001" will be
displayed twice, and then as long as I click the left mouse , it will
be showed twice.
Can anybody tell me how to deal with it ?
Thanks .

the connection is the check, when the focus move to the
datetimepicker, it should check the content of textbox.
(thanks for your reply,the problem was solved. )