有关批量删除

批量删除无法删除,没有任何提示,但是数据还在.
sid的值看上去也是正常的

  1using System;
  2using System.Data;
  3using System.Data.OleDb;
  4using System.Configuration;
  5using System.Collections;
  6using System.Web;
  7using System.Web.Security;
  8using System.Web.UI;
  9using System.Web.UI.WebControls;
 10using System.Web.UI.WebControls.WebParts;
 11using System.Web.UI.HtmlControls;
 12
 13
 14    public partial class ATitle : System.Web.UI.Page
 15    {
 16        protected void Page_Load(object sender, EventArgs e)
 17        {
 18            Context.Response.Cache.SetCacheability(HttpCacheability.NoCache);
 19            if (!this.IsPostBack)
 20            {
 21                bt_selectAll.Text = "全部选中S";
 22                string ToPage = Request.QueryString["ToPage"];
 23                if (ToPage == null)
 24                {
 25                    ToPage = "1";
 26                }
 27                /**//*          if (!StrRegExp.IsID(ToPage)) //StrRegExp.IsID是原来代码里用来检查ToPage是否为规定的3位0-9的数字
 28                            {
 29                                ToPage = "1";
 30                            }
 31                */
 32
 33                string type = Request.QueryString["type"];
 34                if (type == null)
 35                {
 36                    type = "1";
 37                }
 38                this.Bind_rptList(Convert.ToInt32(ToPage), Convert.ToInt32(type));
 39
 40            }
 41
 42            
 43        }
 44        private void Bind_rptList(int ToPage,int type)
 45        {
 46            int CurrentPage = ToPage;
 47            int PageSize = 20;
 48            int PageCount;
 49            int RecordCount;
 50            string PageSQL;
 51            string DataTable = "guestbook";
 52            string DataFiled = "g_ID";            
 53            //string DataFileds = "ID,UserName,Face,Sex,Ip,QQ,HomePage,Email,IsHidden,AddTime,Content,IsReplyed,ReplyTime,ReplyContent ";
 54            string DataOrders = "g_ID Desc";
 55            string DataCondition_where = "";
 56            string DataCondition_and = "";
 57
 58            OleDbConnection objConn = db.CreateConnection();
 59            objConn.Open();
 60
 61            if (type == 1)
 62            {
 63                DataCondition_where = " where g_IsReplyed = false ";
 64                DataCondition_and = " and g_IsReplyed = false ";
 65            }
 66            //* 取得记录总数，计算总页数
 67                string countSql = "select count(" + DataFiled + ") from " + DataTable + DataCondition_where;
 68                OleDbCommand cmd = new OleDbCommand(countSql, objConn);
 69                RecordCount = Convert.ToInt32(cmd.ExecuteScalar());//执行查询，并返回查询所返回的结果集中第一行的第一列。所有其他的列和行将被忽略。
 70                if ((RecordCount % PageSize) != 0)
 71                {
 72                    PageCount = RecordCount / PageSize + 1;
 73                }
 74                else
 75                {
 76                    PageCount = RecordCount / PageSize;
 77                }
 78                if (ToPage > PageCount)
 79                {
 80                    CurrentPage = PageCount;
 81                }
 82                if (CurrentPage <= 1)
 83                {
 84                    PageSQL = "Select Top " + PageSize + " * From " + DataTable + " " + DataCondition_where + " Order By " + DataOrders;
 85                }
 86                else
 87                {
 88                    PageSQL = "Select Top " + PageSize + " * From " + DataTable + " Where " + DataFiled + " Not In ( Select Top " + PageSize * (CurrentPage - 1) + " " + DataFiled + " From " + DataTable + " " + DataCondition_where + " Order By " + DataOrders + " ) " + DataCondition_and + " Order By " + DataOrders;
 89
 90                }
 91                OleDbDataAdapter oda = new OleDbDataAdapter(PageSQL, objConn);
 92                DataSet ds = new DataSet();
 93                oda.Fill(ds, "infList");
 94                this.lbTotalPage.Text = Convert.ToString(PageCount);
 95                this.hlkFirstPage.NavigateUrl = "?type=" + type + "&ToPage=1";
 96                this.hlkLastPage.NavigateUrl = "?type=" + type + "&ToPage=" + PageCount;
 97                this.lbCurrentPage.Text = Convert.ToString(CurrentPage);
 98                if (CurrentPage <= 1)
 99                {
100                    this.hlkPrevPage.Enabled = false;
101                    CurrentPage = 1;
102                }
103                else
104                {
105                    this.hlkPrevPage.Enabled = true;
106                    this.hlkPrevPage.NavigateUrl = "?type=" + type + "&ToPage=" + (ToPage - 1);
107                }
108                if (CurrentPage >= PageCount)
109                {
110                    this.hlkNextPage.Enabled = false;
111                    CurrentPage = PageCount;
112                }
113                else
114                {
115                    this.hlkNextPage.Enabled = true;
116                    this.hlkNextPage.NavigateUrl = "?type=" + type + "&ToPage=" + (ToPage + 1);
117                }
118                rptList.DataSource = ds.Tables["infList"].DefaultView;
119                rptList.DataBind();
120                objConn.Close();
121        }
122        protected void bt_show_Click(object sender, EventArgs e)
123        {
124            string sID="";                             
125            foreach (RepeaterItem item in rptList.Items)
126            {
127                CheckBox chkbox1 = (CheckBox)item.FindControl("ckBox_single");
128
129                if (chkbox1.Checked == true)
130                {                    
131                    sID += ((HtmlInputHidden)item.FindControl("SelectedID")).Value + ',';   
132                }               
133            }            
134            sID = sID.Trim(',');
135            Label1.Text = sID;
136            OleDbConnection objConn = db.CreateConnection();
137            string strSql = "delete from guestbook where (g_id in (@id))";
138            OleDbCommand cmd = new OleDbCommand(strSql, objConn);
139            cmd.Parameters.AddWithValue("@id", sID);
140            objConn.Open();
141            cmd.ExecuteNonQuery();
142            objConn.Close();
143            Response.Write("<script>alert('删除成功，跳转到首页');history.back();</script>");
144        }
145  
146}