“ToTop”的重载均与委托“System.EventHandler”不匹配

Question

请问是怎么回事哈代码如下：   protected void ToTop(object sender, GridViewCommandEventArgs e)
    {
        c1 = e.CommandArgument.ToString().Trim();
        if (!c1.Equals("0"))
        {
            SqlConnection con = new SqlConnection(System.Web.Configuration.WebConfigurationManager.ConnectionStrings["trainConnectionString"].ToString());
            string sql = "update series set rank=1989 where rank="+c1;
            SqlCommand cmd = new SqlCommand(sql, con);
            con.Open();
            cmd.ExecuteNonQuery();
            sql = "update series set rank=" + c1 + " where rank=(" + c1 + "-1)";
            SqlCommand cmd2 = new SqlCommand(sql, con);
            con.Open();
            cmd2.ExecuteNonQuery();
            sql = "update series set rank=(" + c1 + "-1) where rank=1989";
            SqlCommand cmd3 = new SqlCommand(sql, con);
            con.Open();
            cmd3.ExecuteNonQuery();
            SqlDataSource1.DataBind();
            GridView1.DataBind();
        }
    }

Answer 1

重新注册下事件吧，你的方法ToTop的参数类型或返回值类型与你给他绑定的委托的定义不一致