我用GridView 对某一项进行编辑时，数据库不能获取编辑后的值，是怎么回事，谁能帮帮我呢？

我用GridView 对某一项进行编辑时，数据库不能获取编辑后的值，是怎么回事，谁能帮帮我呢？
问一下下面代码里有没有错误啊！
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;public partial class backmanage_memberscoremanage : System.Web.UI.Page
{
    SqlConnection strcon = new SqlConnection(System.Configuration.ConfigurationManager.AppSettings["conn"]);
    DataSet ds = new DataSet();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (Session["admin"] == null)
        {
            Server.Transfer("backlogin.aspx");
        }
        dsdatabind();
    }
    protected void dsdatabind()
    {
        strcon.Open();
        string str = "SELECT id,username,score,address,tel from tb_users order by score desc ";
        SqlDataAdapter datap = new SqlDataAdapter(str, strcon);
        datap.Fill(ds);
        GridView1.DataSource = ds;
        this.GridView1.DataKeyNames = new string[] { "id" };
        GridView1.DataBind();
        strcon.Close();
    }
    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        strcon.Open();
        string id = this.GridView1.DataKeys[e.RowIndex].Value.ToString();
        SqlCommand comm = new SqlCommand("delete from tb_users where id=" + id, strcon);
        comm.ExecuteNonQuery();
        strcon.Close();
        dsdatabind();
    }
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;
        dsdatabind();
    }
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        GridView1.EditIndex = -1;
        dsdatabind();
    }
    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        strcon.Open();
        string uid = this.GridView1.DataKeys[e.RowIndex].Value.ToString();
        GridViewRow row = this.GridView1.Rows[e.RowIndex];
        string str = "update tb_users set score='" + ((TextBox)(row.Cells[2].Controls[0])).Text.ToString() + "' where id='" + uid+"'";
        SqlCommand goodsin = new SqlCommand(str, strcon);
        goodsin.ExecuteNonQuery();
        strcon.Close();
        GridView1.EditIndex = -1;
        dsdatabind();
    }
    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        this.GridView1.PageIndex = e.NewPageIndex;
        dsdatabind();    }
    
   
}