gridview多页数据批量删除

<% @ Page Language = " C# "  AutoEventWireup = " true "  CodeFile = " book_admin.aspx.cs "  Inherits = " admin_book_admin "   %>

<! DOCTYPE html PUBLIC  " -//W3C//DTD XHTML 1.0 Transitional//EN "   " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " >

< html xmlns = " http://www.w3.org/1999/xhtml "   >
< head runat = " server " >
     < title > 留言管理 </ title >
     < link rel = " Stylesheet "  type = " text/css "  href = " /css/admin.css "   />
     < style type = " text/css " >
    .selectfontcolor{
        color:white;
    }
    .lineheight{
        line - height:20px;
    }
     </ style >
</ head >
< body >
     < form id = " form1 "  runat = " server " >
     < div >
         < div style = " text-align:center;padding-bottom:5px; " >
         < asp:TextBox ID = " tbxSearch "  runat = " server "  Text = " 输入ID搜索 "  style = " color:#999999; "  onclick = " this.value='' " ></ asp:TextBox >  
         < asp:Button ID = " btnSearch "  runat = " server "  onClick = " btnSearch_Click "  Text = " 搜索 "   />   
             < asp:Button ID = " btnAll "  runat = " server "  onClick = " btnAll_Click "  Text = " 全部 "   />
             < asp:RegularExpressionValidator ID = " rv1 "  runat = " server "  ControlToValidate = " tbxSearch "
                ErrorMessage = " 您只能输入数字 "  ValidationExpression = " ^[1-9]\d*$ "  Display = " Dynamic " ></ asp:RegularExpressionValidator >
             < asp:RequiredFieldValidator ID = " RequiredFieldValidator1 "  runat = " server "  ControlToValidate = " tbxSearch "
                Display = " Dynamic "  ErrorMessage = " 必须填写 " ></ asp:RequiredFieldValidator ></ div >
       
         < asp:GridView ID = " grwBook "  runat = " server "  CellPadding = " 4 "  ForeColor = " #333333 "  GridLines = " None "  AutoGenerateColumns = " false "  AllowPaging = " true "  DataKeyNames = " ID "  OnPageIndexChanging = " grwBook_PageIndexChanging "  PageSize = " 10 "  OnRowEditing = " grwBook_RowEditing "
                        OnRowUpdating = " grwBook_RowUpdating "  OnRowCancelingEdit = " grwBook_RowCancelingEdit "  OnRowDataBound = " grwBook_RowDataBound " >
             < FooterStyle BackColor = " #507CD1 "  Font - Bold = " True "  ForeColor = " White "   />
             < RowStyle BackColor = " #EFF3FB "   />
             < EditRowStyle BackColor = " #2461BF "  ForeColor = " white "   />
             < PagerStyle BackColor = " #2461BF "  ForeColor = " White "  HorizontalAlign = " Center "   />
             < HeaderStyle BackColor = " #507CD1 "  Font - Bold = " True "  ForeColor = " White "   />
             < AlternatingRowStyle BackColor = " White "   />
             < Columns >
             < asp:BoundField DataField = " ID "  HeaderText  =   " ID "  ReadOnly = " true "   />
             < asp:BoundField DataField = " UserName "  HeaderText = " 姓名 "  ReadOnly = " true " >  
             < ItemStyle Width = " 60px "   />
             </ asp:BoundField >
             < asp:TemplateField HeaderText = " 评论 "  ItemStyle - CssClass = " lineheight " >
                 < ItemTemplate >
                 <% #common.qqReplace(Eval( " Comments " ).ToString())  %>< br  />< br  />
                 < font style = " font-weight:bold;color:#DB3434;padding:0; " > 管理员回复： </ font >< font color = " #DB3434 " ><% #Eval( " Replay " )  %></ font >
                 </ ItemTemplate >
                  < EditItemTemplate >
                  < asp:TextBox Text = ' <%#Eval("Replay")%> '  runat = " server "  TextMode = " MultiLine "  style = " width:450px;height:50px; "   />
                 </ EditItemTemplate >
                 < ItemStyle Width = " 480 "   />
             </ asp:TemplateField >
             < asp:BoundField DataField = " Postdate "  HeaderText = " 日期 "  ReadOnly = " true "   />
             < asp:HyperLinkField DataNavigateUrlFields = " newsid "  DataNavigateUrlFormatString = " ../news_zi.asp?id={0} "  HeaderText = " 文章 "   DataTextField = " newsid "  target = " _blank "   />
             < asp:TemplateField HeaderText = " 操作 "   >
                 < ItemTemplate >
                 < asp:CheckBox runat = " Server "  ID = " cbxId "   />
                 </ ItemTemplate >
             </ asp:TemplateField >
              < asp:CommandField HeaderText = " 回复 "  ShowEditButton = " True "  UpdateText = " 确定 "  EditText = " 回复 "  CancelText = " 取消 "   />
             </ Columns >
             < PagerSettings Mode = NumericFirstLast  PageButtonCount = " 10 "  FirstPageText = " 第一页 "  LastPageText = " 末页 "    />
         </ asp:GridView >
         < asp:Button ID = " btnDel "  runat = " server "  onClick = " btnDel_Click "  Text = " 删除选中 "   />
         < asp:Button ID = " btnEnterCheck "  runat = " server "  Text = " 全选 "  OnClientClick = " checkAll(document.getElementById('form1'),'all') "   />
         < asp:Button ID = " btnCancelAll "  runat = " server "  Text = " 取消全选 "  OnClientClick = " checkAll(document.getElementById('form1'),'none') "   />& nbsp;

     </ div >
     </ form >
</ body >
</ html >
< script language = " javascript "  type = " text/javascript "  src = " ../js/admin.js " ></ script >

 

book_admin.aspx.cs


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.OleDb;

public   partial   class  admin_book_admin : System.Web.UI.Page
{
   
    
     protected   void  Page_Load( object  sender, EventArgs e)
    {
         // 判断管理员是否已经登陆
        admin.checkadmin();
        
        btnDel.Attributes.Add( " onclick " ,  " return confirm('确定删除吗？') " );
 
         if  ( ! Page.IsPostBack)
        {
            datainit();
        }
    }

     protected   void  grwBook_PageIndexChanging( object  sender, GridViewPageEventArgs e)
    {
         this .grwBook.PageIndex  =  e.NewPageIndex;
        Session[ " curretnPage " ]  =  e.NewPageIndex;
        datainit();
    }

     // 数据绑定
     private   void  datainit()
    {
        DataSet ds  =  db.dataSet( " select ID,UserName,Comments,Postdate,Replay,newsid from Feedback order by Postdate desc,newsid desc " );
         if  (ViewState[ " currentPage " ]  !=   null )
        {
             this .grwBook.PageIndex  =  Convert.ToInt32(Session[ " currentPage " ]);
        }
         this .grwBook.DataSource  =  ds;
         this .grwBook.DataBind();
       
    }

     // 数据绑定，重载
     private   void  datainit( int  n)
    {
        DataSet ds  =  db.dataSet( " select ID,UserName,Comments,Postdate,Replay,newsid from Feedback where ID =  " + n + "  order by Postdate desc,newsid desc " );
         if  (ViewState[ " currentPage " ]  !=   null )
        {
             this .grwBook.PageIndex  =  Convert.ToInt32(Session[ " currentPage " ]);
        }
         this .grwBook.DataSource  =  ds;
         this .grwBook.DataBind();
    }

     // 执行删除操作
     protected   void  btnDel_Click( object  sender, EventArgs e)
    {
         string  sqlText  =   " ( " ;
         for  ( int  i  =   0 ; i  <  grwBook.Rows.Count; i ++ )
        {
             // 搜索第n行3列
            CheckBox cbx  =  (CheckBox)grwBook.Rows[i].FindControl( " cbxId " );
             if  (cbx.Checked  ==   true )
            {
               sqlText  =  sqlText  +  Convert.ToInt32(grwBook.DataKeys[i].Value)  +   " , " ;
            }
        }

         // 判断是否有选中
         if  (sqlText  !=   " ( " )
        {
             // 去掉最后的逗号，并且加上右括号
            sqlText  =  sqlText.Substring( 0 , sqlText.Length  -   1 )  +   " ) " ;
            sqlText  =   " delete from Feedback where ID in "   +  sqlText;
             try
            {
                 // 执行删除语句
                db.excuteSql(sqlText);
                 // 重新绑定数据
                common.salert( " 删除成功 " );
                datainit();
            }
             catch  (Exception ex)
            {
                 // 若有错误发生，输出错误信息
                common.salert(ex.Message);
            }
             finally
            {
                grwBook.EditIndex  =   - 1 ;
            }
        }
         else
        {
            common.salert( " 您还没有选中要删除的项 " );
        }
        
    }

     //
     protected   void  grwBook_RowEditing( object  sender, GridViewEditEventArgs e)
    {
        grwBook.EditIndex  =  e.NewEditIndex;
        datainit();
    }


     // 更新
     protected   void  grwBook_RowUpdating( object  sender, GridViewUpdateEventArgs e)
    {
         string  sqlStr  =   " update feedback set replay = ' "
               +  common.delSingle(((TextBox)(grwBook.Rows[e.RowIndex].Cells[ 2 ].Controls[ 1 ])).Text.ToString().Trim())  +   " ' "
               +   "  where ID =  "   +  grwBook.DataKeys[e.RowIndex].Value.ToString();
        db.excuteSql(sqlStr);
        grwBook.EditIndex  =   - 1 ;
        datainit();
 }

     // 取消
     protected   void  grwBook_RowCancelingEdit( object  sender, GridViewCancelEditEventArgs e)
    {
        grwBook.EditIndex  =   - 1 ;
        datainit();
    }

     // 按下搜索
     protected   void  btnSearch_Click( object  sender, EventArgs e)
    {
        datainit(Convert.ToInt32( this .tbxSearch.Text.Trim()));
    }

     // 鼠标放上去变色
     protected   void  grwBook_RowDataBound( object  sender, GridViewRowEventArgs e)
    {
         for  ( int  i  =   0 ; i  <  grwBook.Rows.Count; i ++ )
        {
             // 首先判断是否是数据行
             if  (e.Row.RowType  ==  DataControlRowType.DataRow)
            {
                 // 当鼠标停留时改变背景色
                e.Row.Attributes.Add( " onmouseover " ,  " c=this.style.backgroundColor;this.backgroundColor='red' " );
                 // 当鼠标移开时还原背景色
                e.Row.Attributes.Add( " onmouseout " ,  " this.style.backgroundColor=c " );
            }
        }
    }

     // 按下全部
     protected   void  btnAll_Click( object  sender, EventArgs e)
    {
        datainit();
    }
}