עדיף לראות ברזולוציה גבוהה HD

אימות נתונים בטופס

private bool ValidateName()
        {
            bool bStatus = true;
            if (FirstName.Text == "")
            {
                errorProvider1.SetError(FirstName, "שדה חובה");
                bStatus = false;
            }
            else
                errorProvider1.SetError(FirstName, "");
            return bStatus;
        }

private void price_KeyPress(object sender, KeyPressEventArgs e)
        {
            //string allowedCharacterSet = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890.\b\n";
            string allowedCharacterSet = "1234567890.\b";
            if (allowedCharacterSet.Contains(e.KeyChar.ToString()))
            {
                if (e.KeyChar.ToString() == "."
                    && price.Text.Contains("."))
                {
                    e.Handled = true;
                }
            }
            else
            {
                e.Handled = true;
            }
        }

בחירה מתוך רשימה

combobox