It validates the entries of a textbox while it is being entered, and allows only one instance of the decimal point(period) to be entered. Please vote and leave a comment so that at least i know im doing something right. =)
It has 2 parameters: e.keychar(eventargs) and the textbox control.
If you have any suggestions or encounter an error I would appreciate your comments. Thanks. I it's simple but hopefully this will garner me some votes. =P
Returns a boolean value indicating if the event is handled or not.
None to my knowledge(so far).
| Submitted On | |
| By | Tristan B. Astillero |
| Level | Intermediate |
| User Rating | 4.7 (99 globes from 21 users) |
| Compatibility | VB.NET |
| Category | Algorithims |
| World | .Net (C#, VB.net) |
| Archive File |
Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
e.Handled = NumbersOnly(e.KeyChar, TextBox1)
End Sub
Private Function NumbersOnly(ByVal pstrChar As Char, ByVal oTextBox As TextBox) As Boolean
'validate the entry for a textbox limiting it to only numeric values and the decimal point
If (Convert.ToString(pstrChar) = "." And InStr(oTextBox.Text, ".")) Then Return True 'accept only one instance of the decimal point
If Convert.ToString(pstrChar) <> "." And pstrChar <> vbBack Then
Return IIf(IsNumeric(pstrChar), False, True) 'check if numeric is returned
End If
Return False 'for backspace
End Function