private void GePerTree(HttpContext context, string btn)
 {
     if (btn != "show")
     {
         context.Response.Write("[]");
         return;
     }
     try
     {
         string treeJsonStr        = "[]";
         BLL.System.sys_Person bll = new BLL.System.sys_Person();
         DataTable             dt  = bll.GetDepPersonList().Tables[0];
         if (dt != null && dt.Rows.Count > 0)
         {
             treeJsonStr = DtToTreeJson(dt, "ID", "Name", "SupId", "SortId", "B0", "B0");
         }
         context.Response.Write(treeJsonStr);
     }
     catch
     {
         context.Response.Write("[]");
     }
 }