constraints

[farifari]

hi,, can anyone tell me how to use constraints in VB.net,,, like i mean to say if i have value 10 to 20cm,, or it can b some other also,, n i wana put some constraint to that if the user wana put value above or below this value , it will not work,,,is it possible, tell me coding

I can only know in this that how to constant a text like i can put a password and username,, if it match with that which i hav set before it will work, other wise msg comes TRY AGAIN.I know only this

but i wana know how to use greater than or less than option in this. hope u understand ma question???

[ptaylor965]

If you are using number then the NumberUpDown control can be used as it has a property for min and max allowed plus it only allows numbers

If you are using textboxes then you will have to check the value entered in the OnLeave sub

[farifari]

can you plz send me the detail or code for that,, coz i m really sorry to understand wat u mean??????

[ptaylor965]

OK

For a NumberUpDown box in the Properties screen (Lower Right) you can set a value called Maximum and Minimum or do it in code

numWidth.Maximum = 20
numWidth.Minimum = 5

This will stop the person setting it passed the range

For a textbox you will have to handle this in code

Private Sub txtWidth_Leave(ByVal sender As Object, ByVal e As System.EventArgs) Handles txtWidth.Leave
   If txtWidth.text < 5 or txtWidth.text > 20 Then
      MsgBox("Width is not in range!")
      txtWidth.Focus
   End If
End Sub

This will force the person to change it until it is in range