// remove brackets from search string
        protected void ObjectDataSource1_Filter(object sender, ObjectDataSourceFilteringEventArgs e)
        {
            if (TextBox1.Text != "")
            {
                TextBox1.Text = e.ParameterValues[0].ToString().Replace("[", "");
                e.ParameterValues[0] = TextBox1.Text.Replace("[", "");

                TextBox1.Text = e.ParameterValues[0].ToString().Replace("]", "");
                e.ParameterValues[0] = TextBox1.Text.Replace("]", "");

            }

        }