web自定义控件示例，一个自动分页的datagrid例子

以下是一个web自定义的示例，几年前写的，写得也不是很好，权当抛砖引玉。

主要实现datagrid的分页功能：

调用使用方法：

        this.DataGrid1.ConnectionString =  DataClass.ConnectionString; //这里指定一个连接字串。
        this.DataGrid1.strSQL = strSQL;
        this.DataGrid1.DataBind();

如果当前的sql中有identitykey,则必须指定

     this.DataGrid1.IdentityKey = "字段";

然后绑定。

  如果是acesss数据库

    this.DataGrid1.bIsAccess  = true;

还有几个其他的可选参数，看看代码就明白了。

using  System;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.ComponentModel;
using  System.Data;
using  System.Data.SqlClient;
using  System.Drawing;
using  System.Data.OleDb;

namespace  ZFControls
    ... {
    /**//// <summary>
    /// DataGrid
    /// 实现功能
    /// </summary>
    [  
    ToolboxData("<{0}:DataGrid runat=server></{0}:DataGrid>"),
    ToolboxBitmap(typeof(ZFControls.DataGrid),  "Grid.bmp")
     
    ]
    public class DataGrid : System.Web.UI.WebControls.DataGrid,IPostBackEventHandler
    ...{
         
         
        public DataGrid()
        ...{
            if(this.Context == null)
            ...{
                this.ShowFooter = true;//显示设计视图
            }
        }

         

        private int CurrentPageNo 
        ...{
            get
            ...{
                 
                if(ViewState["PageNo"]==null)
                ...{
                    ViewState["PageNo"] = 1 ;
                }
                return (int)ViewState["PageNo"];
            }
            set
            ...{
                ViewState["PageNo"] =value;
            }
        }

        /**//// <summary>
        /// 是否在列表中显示记录数,默认为True
        /// </summary>
        private bool  ShowRecordCount
        ...{
            get
            ...{
                 
                if(ViewState["ShowRecordCount"]==null)
                ...{
                    ViewState["ShowRecordCount"] = true ;
                }
                return (bool)ViewState["ShowRecordCount"];
            }
            set
            ...{
                ViewState["ShowRecordCount"] =value;
            }
        }

        /**//// <summary>
        /// 是否使用默认的样式 默认为true
        /// </summary>
        public bool  bDefaultStyle
        ...{
            get
            ...{
                 
                if(ViewState["DefaultStyle"]==null)
                ...{
                    ViewState["DefaultStyle"] = true ;
                }
                return (bool)ViewState["DefaultStyle"];
            }
            set
            ...{
                ViewState["DefaultStyle"] =value;
            }
        }

        public string SortExpression 
        ...{
            get
            ...{
                if(ViewState["SortExpression"]==null)
                ...{
                    ViewState["SortExpression"] = "" ;
                }
                return (string)ViewState["SortExpression"];
            }
            set
            ...{
                ViewState["SortExpression"] =value;
            }
        }

        public bool bIsAccess 
        ...{
            get
            ...{
                if(ViewState["IsAccess"]==null)
                ...{
                    ViewState["IsAccess"] =  false ;
                }
                return (bool)ViewState["IsAccess"];
            }
            set
            ...{
                ViewState["IsAccess"] =value;
            }
        }

        private int RecordCount 
        ...{
            get
            ...{
                if(ViewState["RecordCount"]==null)
                ...{
                    ViewState["RecordCount"] = 0;
                }
                return (int)ViewState["RecordCount"];
            }
            set
            ...{
                ViewState["RecordCount"] =value;
            }
        }
        public string IdentityKey 
        ...{
            get
            ...{
                if(ViewState["IdentityKey"]==null)
                ...{
                    ViewState["IdentityKey"] = "";
                }
                return (string)ViewState["IdentityKey"];
            }
            set
            ...{
                ViewState["IdentityKey"] =value;
            }
        }
        private int  PageCount1
        ...{
            get
            ...{
                if(this.Context == null) return 0;

                if(this.RecordCount % this.PageSize ==0)
                    return this.RecordCount /this.PageSize;
                else
                    return Convert.ToInt32(this.RecordCount /this.PageSize) +1;
            }
         
             
        }


        private System.Web.UI.WebControls.DataGridItem objFooterItem; //footer Item
    
        public string strSQL 
        ...{
            get
            ...{
                if(ViewState["strSQL"]==null)
                ...{
                    ViewState["strSQL"] = "" ;
                }
                return (string)ViewState["strSQL"];
            }
            set
            ...{
                if((string)value != this.strSQL)
                ...{
                    this.CurrentPageNo = 1;//更改了strSQL,重置参数
                    this.RecordCount = 0;
 
                }
                

                ViewState["strSQL"] =value;

            }
        }
    
        public string  ConnectionString
        ...{
            get
            ...{
                if(ViewState["ConnectionString"]==null)
                ...{
                    ViewState["ConnectionString"] = "";
                }
                return (string)ViewState["ConnectionString"];
            }
            set
            ...{
                ViewState["ConnectionString"] =value;
            }
        }

        public string ImagePath 
        ...{
            get
            ...{
                if(ViewState["ImagePath"]==null)
                ...{
                    ViewState["ImagePath"] = "../images/" ;
                }
                return (string)ViewState["ImagePath"];
            }
            set
            ...{
                ViewState["ImagePath"] =value;
        
            }
        }

        private string OldSortExpression
        ...{
            get
            ...{
                if(ViewState["OldSortExpression"]==null)
                ...{
                    ViewState["OldSortExpression"] = "";
                }
                return (string)ViewState["OldSortExpression"];
            }
            set
            ...{
                ViewState["OldSortExpression"] =value;
            }
        }

        public bool ShowNoRecordMsg
        ...{
            get
            ...{
                if(ViewState["ShowNoRecordMsg"]==null)
                ...{
                    ViewState["ShowNoRecordMsg"] = true;
                }
                return (bool)ViewState["ShowNoRecordMsg"];
            }
            set
            ...{
                ViewState["ShowNoRecordMsg"] =value;
            }
        }

         
        
         
         
   


        private string GetStyleString()
        ...{
            string res ="";
            foreach(string sKey in this.Style.Keys)
            ...{
                res += sKey +":"+ this.Style[sKey] +";";
            }
            return res;

            
            
        }

    
         
        
        protected override void OnSortCommand(DataGridSortCommandEventArgs e)
        ...{
            
            
            string sSort = e.SortExpression.Trim();
            if(this.SortExpression.Trim().Split(' ')[0] == e.SortExpression)
            ...{
                sSort = this.SortExpression;
            }

            string direct ="ASC";
            if (sSort.IndexOf(" ")>-1)
            ...{
                direct = sSort.Split(' ')[1];
                
                
                if(direct.ToUpper() =="ASC")
                ...{
                    direct ="DESC";
                    
                    
                }
                else
                ...{
                    direct ="ASC";
                    
                }
                
                
            }
            
            
            sSort = sSort.Split(' ')[0] +" "+ direct;
            
            if(this.OldSortExpression!="")
            ...{
                DataGridColumn oOldCol = this.GetColumnBySortExpression(this.OldSortExpression);
                oOldCol.HeaderText =  oOldCol.HeaderText.Split(' ')[0];
            }

            DataGridColumn col = GetColumnBySortExpression(e.SortExpression);

            if(direct =="ASC")
            ...{
                col.HeaderText = col.HeaderText.Split(' ')[0] +" <font class='gridarrow' face='webdings'>5</font>";
            }
            else
            ...{
                col.HeaderText = col.HeaderText.Split(' ')[0] +" <font class='gridarrow'   face='webdings'>6</font>";
            }
            this.OldSortExpression = e.SortExpression;
            this.SortExpression = sSort;
            this.DataBind();
        }

        private  DataGridColumn GetColumnBySortExpression(string sort)
        ...{
            for (int i=0;i<this.Columns.Count;i++)
            ...{
                if(this.Columns[i].SortExpression ==sort.Split(' ')[0])
                ...{
                    return this.Columns[i];
                }
            }
             
            return null;
        }
        
    
         

     

        protected override void OnItemCreated(DataGridItemEventArgs e)
        ...{
            
            
 
            if(e.Item.ItemType == ListItemType.Footer)
            ...{
                
                this.objFooterItem = e.Item;//将它保存下来,目前还不能取得它的Visible 属性,最后再处理
                
                
            }
            else if(e.Item.ItemType == ListItemType.Item 
                || e.Item.ItemType == ListItemType.AlternatingItem)
            ...{
                e.Item.Attributes.Add("onmouseover","javascript:return DataGridOnMouseOver();");
                e.Item.Attributes.Add("onmouseout","javascript:return DataGridOnMouseOut();");

            }
            
            base.OnItemCreated (e);
        }



         
     
        
        private string GetPagerText ()
        ...{
             
            string res = @"<!--{3}-->
            <table align='right'>
            <TR>
            <TD>
                <span  {0} {9} title='回到首页'  οnclick=""if(this.disabled) return ;hidAction_{2}.value='1';btnPager_{2}.click();"" style='CURSOR: hand; ;border: solid 1px #ffffff;padding-right:2px;'><font face='webdings'>7</font>[首页]</span>
            </TD>
            <TD>
            <span     {0} {9} title='回到上一页' οnclick=""if(this.disabled) return ;hidAction_{2}.value='2';btnPager_{2}.click();"" style='CURSOR: hand; border: solid 1px #ffffff;padding-right:2px;'> <font face='webdings'>3</font>上页</span>
            </TD>
            <TD>
            <span    {1} {9} title='回到下一页' οnclick=""if(this.disabled) return ;hidAction_{2}.value='3';btnPager_{2}.click();"" style='CURSOR: hand;border: solid 1px #ffffff;padding-right:2px;'> 下页<font face='webdings'>4</font></span>
            </TD>            
            <TD>
            <span   {1} {9} title='回到最后一页' οnclick=""if(this.disabled) return ;hidAction_{2}.value='4';btnPager_{2}.click();"" style='CURSOR: hand; border: solid 1px #ffffff;padding-right:2px;'>[末页]<font face='webdings'>8</font></span> 
            </TD>
            <TD>    
                <span id='lblCurrentIndex' style='CURSOR: hand' >[{4}/{8}页]</span> 
            </TD><TD>
            <span id='tbl1' style='CURSOR: hand;height:20px;border: solid 0px #e0e0e0;padding:2px;'></TD><TD>{10}</TD><TD>跳到</TD><TD></span><input name='txtGoPage_{2}' value='{7}' type='text' id='txtGoPage' class='textbox1' style='width:20px;height:18px' />
            </TD><TD>    <INPUT class='btnPager' οnclick=""hidAction_{2}.value='5';btnPager_{2}.click();""     type=button value=' GO '> </TD><TD>
                <span id='tbl2' style='CURSOR: hand;height:20px;border: solid 0px #e0e0e0;padding:2px;'>每页显示</span></TD><TD><input name='txtRowsPager_{2}' type='text' id='txtRowsPager' value='{5}' class='textbox1' style='width:20px;height:18px' /></TD><TD> <INPUT class='btnPager' οnclick=""hidAction_{2}.value='6';btnPager_{2}.click();""    type=button value=重置> 
            </TD><TD><input name='hidAction_{2}' id='hidAction_{2}'  type='hidden' />";
            if(this.Context != null)//非设计视图
            ...{
                    res += @"
            <input type='button' name='btnPager_{2}'  id='btnPager_{2}'   {6} value='Button' id='btnPager_{2}' style='DISPLAY: none' /> ";
            }
            res +=@"</TD><TD>
            </TR></TABLE>";
            
            
             
            
            //System.Web.HttpContext.Current.Response.Write(System.Web.HttpContext.Current.Server.HtmlEncode(res)); 
            //System.Web.HttpContext.Current.Response.Flush();
            string sP0  =   this.CurrentPageNo > 1 ?"":"disabled";
            string sP1  =   this.CurrentPageNo < this.PageCount1 ?"":"disabled";
            string sP2    =    this.ID;
            string sP3    =     this.ImagePath ;
            string sP4    =    "<font color='red'>"+this.CurrentPageNo.ToString()+"</font>";
            string sP5    =    this.PageSize.ToString();
            string sP6    =    "οnclick="javascript:"+this.Page.GetPostBackEventReference(this,"btnPager_"+sP2)+""";
            string sP7    =    this.CurrentPageNo.ToString();
            //System.Web.HttpContext.Current.Response.Write(this.PageCount1+"**");

            string sP8    =    "<font color='red'>"+this.PageCount1.ToString()+"</font>";
            string sP9    =    "οnmοuseοver='javascript:{0}_PagerOnMouseOver(this);' οnmοuseοut='javascript:{0}_PagerOnMouseOut(this);'  οnmοusedοwn='javascript:{0}_PagerOnMouseDown(this);' οnmοuseup='javascript:{0}_PagerOnMouseUp(this);'";
            string sP10  = "";
            if(this.ShowRecordCount) //显示记录数
            ...{
                sP10  = "[<font color='red'>"
                    + (((this.CurrentPageNo-1)* this.PageSize)+1).ToString()+"</font>-<font color='red'>"
                    +(  this.CurrentPageNo*this.PageSize <this.RecordCount?this.CurrentPageNo*this.PageSize:this.RecordCount ).ToString()+"</font>/<font color='red'>"+this.RecordCount.ToString()+"</font>条] ";            
            }
            sP9            =    String.Format(sP9,sP2);
            res = String.Format(res,sP0,sP1,sP2,sP3,sP4,sP5,sP6,sP7,sP8,sP9,sP10);

            
            string res1 = @"
        <SCRIPT LANGUAGE='javascript'>
        <!--
            function {0}_PagerOnMouseOver(obj)
            {
                if(obj.disabled) return;obj.runtimeStyle.cssText ='border-right:solid 1px gray;border-bottom:solid 1px gray ';
            }
            function {0}_PagerOnMouseOut(obj)
            {
                if(obj.disabled) return;obj.runtimeStyle.cssText = '';
            }
            function {0}_PagerOnMouseDown(obj)
            {
                if(obj.disabled) return;
                obj.runtimeStyle.cssText ='border-bottom:solid 1px white;border-right:solid 1px white;border-top:solid 1px gray;border-left:solid 1px gray;';
            }
            function {0}_PagerOnMouseUp(obj)
            {
                if(obj.disabled) return;obj.runtimeStyle.cssText = 'border-top:solid 1px white;border-left:solid 1px white;border-bottom:solid 1px gray;border-right:solid 1px gray;';
            }
        //-->
        </SCRIPT>
        <!--********************************************--->
        ";
            //res1 = String.Format(res1,sP2);
            res1 = res1.Replace("{0}",sP2);
            return res+res1;
        }
        

        protected override void OnPreRender(EventArgs e)
        ...{
            //base.OnPreRender(e);
            //return;
            if(bDefaultStyle)//默认的样式
            ...{
                this.BorderColor = (Color)new System.Drawing.ColorConverter().ConvertFromString("#E3EDF5");
                this.Attributes["Class"] = "GridTable";
            }//处理FoooterItem
            //找到第一个Visible = True的列
            if(this.objFooterItem !=    null)
            ...{
                int i = 0;
                for (i = 0;i<  this.Columns.Count;i++)
                ...{
                    if(this.Columns[i].Visible )
                    ...{
                        break;
                    }
                }


                while(this.objFooterItem.Cells.Count>i+1)
                ...{
                    objFooterItem.Cells.RemoveAt(0);
                }
                objFooterItem.Cells[i].ColumnSpan = this.Columns.Count-i;
                if(this.bDefaultStyle)
                ...{
                    objFooterItem.Cells[i].Attributes["class"] = "t1";
                }
                if(this.Items.Count ==0 && this.ShowNoRecordMsg) //没有记录
                ...{
                    this.objFooterItem.Cells[i].Text =@"<table width='100%' cellspacing='0' cellpadding='0'><TR><TD height='20px' style='color:gray' align='center'>信息:没有查询到任何记录！</td></tr>    
                                             </table>";
                }    
                else
                ...{
                    this.objFooterItem.Cells[i].HorizontalAlign = HorizontalAlign.Right;
                    this.objFooterItem.Cells[i].Text = this.GetPagerText();
                    this.objFooterItem.Cells[i].Height = 22;
                    //e.Item.Cells[0].Style.Add("border-top","solid 2px #336699");
                }
            }




            if(this.HeaderStyle.CssClass == "")
            ...{
                this.HeaderStyle.CssClass = "gridheader";
            }
            if(this.ItemStyle.CssClass =="")
            ...{
                this.ItemStyle.CssClass ="t1";
            }
            if(this.AlternatingItemStyle.CssClass =="")
            ...{
                this.AlternatingItemStyle.CssClass ="t2";
            }
     
            this.ShowFooter = true;
            base.OnPreRender (e);
        }

        

        
         
      


        

        
        
        
        
        
        
        
        [Bindable(true), 
        Category("Appearance"), 
        DefaultValue("")] 
        /**//// <summary> 
        /// 将此控件呈现给指定的输出参数。
        /// </summary>
        /// <param name="output"> 要写出到的 HTML 编写器 </param>
        
         protected override void Render(HtmlTextWriter output)
        ...{
            
            if(this.Context == null) //设计
            ...{
                output.Write("<div style='width:100%;border:solid 1px #336699'>");
            
                output.Write("<font color='orange'>请注意:<BR>1、必须指定的参数：ConnectString,strSQL<BR> 2、如果查询中只有一张表且有IdentityKey必须指定该Key</font>");
            }
            base.Render(output);
 
            if(this.Context == null)
            ...{
                output.Write(this.GetPagerText());
                output.Write("<DIV>");
            }
            
            
        }
         
        /**//// <summary>
        /// 利用存储过程进行分页
        /// </summary>
        /// <param name="strSQl">sql</param>
        /// <param name="PrimaryKey">关键字段，一般为表的主健</param>
        /// <param name="PageNo">当前页从1开始</param>
        /// <param name="PageSize">页面大小</param>
        /// <param name="SortExpression">排序表达式</param>
        /// <param name="RecordCount">记录总数</param>
        /// <returns></returns>
        public  DataSet GetSqlResult(string strSQL,string PrimaryKey,int PageNo,int PageSize,string SortExpression,ref int RecordCount)
        ...{
            SqlConnection conn =null; 
            SqlCommand cmd =null;
            SqlDataAdapter dapt =null;
            try
            ...{
                conn= new  SqlConnection(this.ConnectionString);
                
                cmd = new SqlCommand("GetPageResult",conn);
                cmd.CommandTimeout = 60000;
                cmd.CommandType = CommandType.StoredProcedure;
                SqlParameter pSql = cmd.Parameters.Add("@sql",SqlDbType.NVarChar,4000);
                pSql.Value = strSQL;
                SqlParameter pPKey = cmd.Parameters.Add("@PKey",SqlDbType.VarChar,50);
                pPKey.Value = PrimaryKey;
                SqlParameter pPageNo = cmd.Parameters.Add("@PageNo",SqlDbType.Int,4);
                pPageNo.Value = PageNo;
                SqlParameter pPageSize = cmd.Parameters.Add("@PageSize",SqlDbType.Int,4);
                pPageSize.Value = PageSize;
                SqlParameter pSort = cmd.Parameters.Add("@sort",SqlDbType.VarChar,50);
                pSort.Value = SortExpression;
                SqlParameter pRecordCount = cmd.Parameters.Add("@RecordCount",SqlDbType.Int,4);
                //pRecordCount.Value = SortExpression;
                pRecordCount.Direction = ParameterDirection.Output;
                dapt = new SqlDataAdapter(cmd);
                conn.Open();
                DataSet ds = new DataSet();
                dapt.Fill(ds,"Table1");
                RecordCount =(int)pRecordCount.Value;
                return ds;
                    
            }
            catch (Exception e)
            ...{
                throw(e);
                //return null;
            }
            finally
            ...{
                if(conn!=null)
                    conn.Dispose();
                if(cmd!=null)
                    cmd.Dispose();
                if(dapt!=null)
                    dapt.Dispose();
            }
            
        }

        /**//// <summary>
        /// 利用存储过程进行分页
        /// </summary>
        /// <param name="strSQl">sql</param>
        /// <param name="PrimaryKey">关键字段，一般为表的主健</param>
        /// <param name="PageNo">当前页从1开始</param>
        /// <param name="PageSize">页面大小</param>
        /// <param name="SortExpression">排序表达式</param>
        /// <param name="RecordCount">记录总数</param>
        /// <returns></returns>
        public  DataSet GetAccessResult(string strSQL,string PrimaryKey,int PageNo,int PageSize,string SortExpression,ref int RecordCount)
        ...{
            
            
            DataSet ds  = new DataSet();
            if(System.Web.HttpContext.Current.Session[this.Page.ToString()]==null||(!this.Page.IsPostBack))
            ...{

                OleDbConnection conn =null; 
                OleDbDataAdapter dapt =null;
                try
                ...{
                
                 
                    conn = new OleDbConnection(this.ConnectionString);
                    conn.Open();
                    dapt = new OleDbDataAdapter(strSQL,conn);
                    //DataSet ds = new DataSet();
                    dapt.Fill(ds,"Table1");
                    System.Web.HttpContext.Current.Session[this.Page.ToString()] =ds;
                }
                catch (Exception e)
                ...{
                    throw(e);
                    //return null;
                }
                finally
                ...{
                    if(conn!=null)
                        conn.Dispose();
                     
                    if(dapt!=null)
                        dapt.Dispose();
                }
            }
            else
            ...{
                ds =(DataSet)System.Web.HttpContext.Current.Session[this.Page.ToString()];
            }

            DataView dv =ds.Tables[0].DefaultView;
            if(SortExpression!="")
                dv.Sort  = SortExpression ;
            RecordCount  = dv.Count;
            
            DataTable dt =  ds.Tables[0].Clone();
            int iStart = (PageNo-1) * PageSize+1;
            int iEnd =    PageNo * PageSize;
            //System.Web.HttpContext.Current.Response.Write(this.PageCount1);
            
            if(iEnd>dv.Count)
                iEnd = dv.Count;

            if(iStart>0 && iEnd>=iStart)
            ...{
                for(int i = iStart-1;i<iEnd;i++)
                ...{
                     DataRow row = dt.NewRow();
                    row.ItemArray  = dv[i].Row.ItemArray;
                
                    dt.Rows.Add(row);
                }
            }
            //ds = null;
            dv = null;
            ds = new DataSet();
            ds.Tables.Add(dt);
            return ds;

        }

        
        private string GetRequestValue(string sKey)
        ...{
            object o = this.Page.Request.Form[sKey];
            if(o!=null)
            ...{
                return o.ToString().Trim();
            }
            return "";
        }


        
        public override void DataBind()
        ...{    
            if(this.Context  == null)
            ...{
                base.DataBind();
                return;
            }
            if(this.ConnectionString =="")
            ...{
                throw(new Exception("没有指定ConnectionString"));
            }
            if(this.strSQL =="")
            ...{
                throw(new Exception("没有指定strSQL"));
            }
            
            int iCount =0;
            //Add BY zhaofeng 2004-11-19
            if(this.CurrentPageNo >this.PageCount1)
            ...{
                this.CurrentPageNo = this.PageCount1;
            }
            if(this.CurrentPageNo == 0 )
                this.CurrentPageNo = 1;
            //Add End
            DataSet ds = null;
            if(this.bIsAccess)
                ds = this.GetAccessResult(this.strSQL,this.IdentityKey,this.CurrentPageNo,this.PageSize,this.SortExpression,ref iCount);
            else

                ds = this.GetSqlResult(this.strSQL,this.IdentityKey,this.CurrentPageNo,this.PageSize,this.SortExpression,ref iCount);
            
            this.RecordCount = iCount;
            this.DataSource =ds.Tables[0].DefaultView;
            base.DataBind ();
        }

        private void DoPager()
        ...{
            string sAcionType = this.GetRequestValue("hidAction_"+this.ID);
            switch (sAcionType)
            ...{
                case "1":
                    this.CurrentPageNo =1;
                    break;
                case "2":
                    if(this.CurrentPageNo >1)
                    ...{
                        this.CurrentPageNo = this.CurrentPageNo -1;
                    }
                    else
                        return;
                    break;
                case "3":
                    
                    if(this.CurrentPageNo <this.PageCount1)
                    ...{
                        this.CurrentPageNo = this.CurrentPageNo +1;
                    }
                    else
                        return ;
                    break;
                case "4":
                    if(this.CurrentPageNo !=this.PageCount1 )
                    ...{
                        this.CurrentPageNo = this.PageCount1;
                    }
                    else
                        return ;
                    break;
                case "5": //Goto
                    string sCurPage    = this.GetRequestValue("txtGoPage_"+this.ID);
                    if(CCConvert.IsInt32(sCurPage))
                    ...{
                        int iCurrentPageNo = Convert.ToInt32(sCurPage);
                        if(iCurrentPageNo >0 && iCurrentPageNo <=this.PageCount1)
                        ...{
                            this.CurrentPageNo = iCurrentPageNo;
                        }
                    }
                    else
                        return ;
                    break;
                case "6"://重设显示页数
                    string sPageSize = this.GetRequestValue("txtRowsPager_"+this.ID);
                    if(CCConvert.IsInt32(sPageSize))
                    ...{
                        int iPage =  Convert.ToInt32(sPageSize);
                        if(iPage>0)
                            this.PageSize =iPage;
                        else
                            return ;
                    }
                    else
                        return;
                    break;
                default:
                    return;

            }

             
            this.DataBind();
        }
        IPostBackEventHandler 成员#region IPostBackEventHandler 成员

        public void RaisePostBackEvent(string eventArgument)
        ...{
            if(eventArgument == "btnPager_"+this.ID)
            ...{
                this.DoPager();
            }
                
        }
        protected override void OnInit(EventArgs e)
        ...{
            
 
            base.OnInit (e);
        }


         
        #endregion
    }
}

 

用到的存储过程：

 

SET  QUOTED_IDENTIFIER  OFF  
GO
SET  ANSI_NULLS  OFF  
GO





/* ****************************
名称:GetPageResult
功能:得到分页记录集
作者:cpp2017
编写时间:2002-08-17
**************************** */

CREATE        PROCEDURE  GetPageResult 
   @sql   nvarchar ( 4000 ) , -- Sql Statment
   @PKey   varchar ( 100 ), -- -Primary Key Name
   @PageNo   int  , -- Current Page No
   @PageSize   int ,  -- PageSize
   @Sort   varchar ( 50 ), -- Sort Field
   @RecordCount   int  output  -- RecordCount 传出参数
   AS  
BEGIN

   
  DECLARE   @sqlStr   NVARCHAR ( 4000 );
  -- -得到记录总数Start 
if   @RecordCount   =   - 1   or   @RecordCount   is   null
begin  
     SET   @sqlStr   = ' select @count = Count(1) from ( ' + @sql + ' ) as AA ' ;
     EXECUTE  sp_executesql  @sqlStr ,N ' @count int out ' , @RecordCount  out;
end  
  -- -得到记录总数End
  -- 加上排序 Start 
  IF    @Sort   IS   not   null   and   @sort   <>   ''
       BEGIN
        
         Set   @sort   = '  order by  ' +   @sort ;
     END  
-- 加上排序 End
  IF   ( @PageNo   = 1  )  -- 第一页
     SET    @sqlStr   = ' select top  '   +   cast ( @PageSize   as   varchar ( 5 ))  + '  * FROM ( ' +   @sql   + '  ) AS AA  '   +   @sort  
  ELSE
  
   BEGIN
     declare   @sMaxCount    varchar ( 10 )
     declare   @sMinCount    varchar ( 10 )
     set       @sMaxCount      =   cast ( @PageSize * @PageNo   as   varchar ( 5 ))
     set       @sMinCount      =   Convert ( nvarchar ( 10 ),( @PageNo - 1 ) * @PageSize )
    
      
     if   @PKey   !=   ''   or   @PKey   is   null    -- 如果有主键,注此key必须是identity key
         begin
             SET    @sqlStr = ' select top  '   +   @sMaxCount   +   '   '   +   @PKey +    '   into #temp from ( ' +   @sql   + ' ) as AA  '   +   @sort   + ' ; '
             Set    @sqlStr   =   @sqlStr   +   ' delete from #temp where  '   + @PKey   +   '  in (select top  ' + @sMinCount   + '   ' +   @PKey   + '  from #temp); '
             SET    @sqlStr   =   @sqlStr   + '  select A.* from ( ' + @sql + ' ) AS A INNER JOIN   #temp as B ON A. '   + @PKey   + ' =B. ' + @Pkey + '  ;drop table #temp '
         end
     else
     Begin     
         SET    @sqlStr = ' select top  '   +   @sMaxCount   +   '  *  into #temp from ( ' +   @sql   + ' ) as AA  '   +   @sort   + ' ; '
         SET    @sqlStr   =    @sqlStr   +   ' exec( '' alter table #temp add PrimaryKey int identity(1,1); '' );  delete from #temp where PrimaryKey in (select top  '   + @sMinCount   + '  PrimaryKey From #temp)  '
         
         SET    @sqlStr   =    @sqlStr   + ' ;select  * from #temp;drop table #temp '  
     end  
   END
   
   EXECUTE  ( @sqlStr )
     print   @sqlstr
END
GO
SET  QUOTED_IDENTIFIER  OFF  
GO
SET  ANSI_NULLS  ON  
GO

 

 

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