public class EditCategory : IHttpHandler
    {
        private SQLHelper sqlhelper = new SQLHelper();

        public void ProcessRequest(HttpContext context)
        {
            HttpResponse response = context.Response;
            HttpRequest request = context.Request;

            int id = Convert.ToInt32(request.Form["id"]);
            string name = request.Form["name"];
            string location = request.Form["location"];

            string sql = "update SD_Category set CategoryName=@cname,Location=@loc where CategoryID=@cid";
            OleDbParameter[] param = new OleDbParameter[]{
                new OleDbParameter("@cname",name),
                new OleDbParameter("@loc",location),
                new OleDbParameter("@cid",id)
            };
            if (sqlhelper.ExecuteNonQuery(sql, param, CommandType.Text) > 0)
            {
                //response.ContentType = "application/json";
                //response.Write("{result: '类别更新成功!'}");    //{}表示js中对象
                response.Redirect("CategoryManage.aspx");   //这里跳转不了
                
            }
        }
}