//************************************** // Name: Accept numeric values only in a textbox // Description: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. =) // By: Tristan B. Astillero (from psc cd) // // // Inputs:It has 2 parameters: e.keychar(eventargs) and the textbox control. // // Returns:Returns a boolean value indicating if the event is handled or not. // //Assumes: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 // //Side Effects:None to my knowledge(so far). //************************************** 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 limiti // ng it to only numeric values and the dec // imal 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