how to split value in gridview itemtemplate & take only 1st data?

protected void GVSample_RowDataBound(object sender, GridViewRowEventArgs e)
        {   //Get data row view
            DataRowView drview = e.Row.DataItem as DataRowView;
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                //Find textbox control
                TextBox txtname = (TextBox)e.Row.FindControl("txtName");
                String text = "ABC~12"
                txtname.Text = text.Split('~')[0].ToString();
            }
        }