EventAI_Creator.EventControl.txtBox_Leave C# (CSharp) Method

        private void txtBox_Leave(object sender, EventArgs e)
        {
            string str = (sender as TextBox).Text.Trim();
            Int64 value;
            bool isNum = Int64.TryParse(str, out value);
            if (isNum)
            {
                if (!locked)
                    GetEventData();
            }
            else
                (sender as TextBox).Text = "0";
        }