• 重写Repeater控件,并分页管理


    1、重写Repeater(修改过的,当只有一页的情况时,只显示Total页数及共有多少条目,不会显示上一页,下一页等):

    View Code
    using System.ComponentModel;
    using System.Web.UI;
    [assembly: TagPrefix("MyRepeater.Control", "MyRepeater")]
    namespace MyRepeater
    {
        /// <summary>
        /// JRepeater控件
        /// </summary>
    
        [DefaultProperty("Text"), ToolboxData("<!--Repeater Begin --><div class=\"BigDiv_rep\"> <{0}:Repeater ID=\"Rep_List\" runat=server EnableViewState=\"false\" OnPreRender=\"Rep_List_PreRender\"> <HeaderTemplate><div class=\"BigDiv_Title_rep\"> <ul> <li style=\"line-height:22px;\"> <asp:CheckBox ID=\"TopCheckBox\" runat=\"server\" Text=\"ID\" EnableViewState=\"false\"/> </li><li style=\"10%;\"> </li>  </ul> </div> </HeaderTemplate><ItemTemplate><div class=\"BigDiv_line_rep\"  onmouseover=\"javascript:this.style.backgroundColor='#EEF8F9'\" onmouseout=\"javascript:this.style.backgroundColor='#FFFFFF'\"><ul ><li style=\"line-height:22px;\"><asp:CheckBox ID=\"ItemCheckBox\" runat=\"server\" Text='<%# Eval(\"ID\") %>'  EnableViewState=\"false\"/></li><li style=\"10%;\"></li></ul></div></ItemTemplate>   <FooterTemplate><div class=\"DelAllButton\"><asp:Button ID=\"btn_DelAll\" runat=\"server\" onclick=\"btn_DelAll_Click\"  CssClass=\"btn_DelAllCss\"  Text=\"删除\"  EnableViewState=\"false\"/></div></FooterTemplate></{0}:Repeater></div><!--Repeater End -->")]
        public class Repeater : System.Web.UI.WebControls.Repeater
        {
            public bool ShowPagingWhenItemLessThanPageSize { get; set; }
    
            private int _recordcount = 0;
            private int _pagesize = 0;
            private string _pagelink = "";
            private int _currentpage = 1;
            private string _urlSearchPrex = null;
            /// <summary>
            /// constructure
            /// </summary>
            public Repeater()
            {
                this.ShowPagingWhenItemLessThanPageSize = true;
            }
    
            #region _
    
            [Bindable(true), Category("Data"), DefaultValue("1"), Description("totalCount")]
            public int RecordCount
            {
                get
                {
                    return _recordcount;
                }
    
                set
                {
                    _recordcount = value;
                }
            }
    
            [Bindable(true), Category("Data"), DefaultValue("1"), Description("pagesize")]
            public int PageSize
            {
                get
                {
                    return _pagesize;
                }
    
                set
                {
                    _pagesize = value;
                }
            }
    
            [Bindable(true), Category("Data"), DefaultValue(""), Description("currentLink")]
            public string PageLink
            {
                get
                {
                    return _pagelink;
                }
    
                set
                {
                    _pagelink = value;
                }
            }
    
            [Bindable(true), Category("Data"), DefaultValue("1"), Description("currentPageIndex")]
            public int CurrentPage
            {
                get
                {
                    return _currentpage;
                }
    
                set
                {
                    _currentpage = value;
                }
            }
    
            public string UrlSearchPrex
            {
                get { return _urlSearchPrex; }
                set { _urlSearchPrex = value; }
            }
            #endregion
    
    
    
            /// <summary> 
            /// output control to page
            /// </summary>
            /// <param name="output">  </param>
            protected override void Render(HtmlTextWriter output)
            {
                base.Render(output);
    
                if (this._recordcount <= this._pagesize)
                {
                    output.WriteLine("<div class=\"PageLink\"><font color=\"#666666\">Total:1 page(s)&nbsp;&nbsp;&nbsp;" + this._recordcount + "&nbsp;record(s)</div>");
                    return;
                }
                if (!(this._recordcount <= this._pagesize && !this.ShowPagingWhenItemLessThanPageSize))
                {
                    output.WriteLine("<div class=\"PageLink\">" + Pagination(_recordcount, _pagesize, _currentpage, _pagelink, _urlSearchPrex) + "</div>");
                }
            }
    
    
            /// <summary>
            /// paging function
            /// </summary>
            /// <param name="recordcount">total count</param>
            /// <param name="pagesize"></param>
            /// <param name="currentpage"></param>
            /// <param name="url"></param>
            /// <returns></returns>
            public string Pagination(int recordcount, int pagesize, int currentpage, string url, string urlSearchPrex)
            {
                int allcurrentpage = 0;
                int next = 0;
                int pre = 0;
                int startcount = 0;
                int endcount = 0;
                string currentpagestr = "";
    
                if (currentpage < 1) { currentpage = 1; }
                //total page count
                if (pagesize != 0)
                {
                    allcurrentpage = (recordcount / pagesize);
                    allcurrentpage = ((recordcount % pagesize) != 0 ? allcurrentpage + 1 : allcurrentpage);
                    allcurrentpage = (allcurrentpage == 0 ? 1 : allcurrentpage);
                }
                next = currentpage + 1;
                pre = currentpage - 1;
                startcount = (currentpage + 5) > allcurrentpage ? allcurrentpage - 9 : currentpage - 4;
    
                endcount = currentpage < 5 ? 10 : currentpage + 5;
                if (startcount < 1) { startcount = 1; }
                if (allcurrentpage < endcount) { endcount = allcurrentpage; }
                currentpagestr = "<font color=\"#666666\">Total:&nbsp;" + allcurrentpage + "&nbsp; page(s) &nbsp;&nbsp; " + recordcount + "&nbsp;record(s) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;";
    
                string checkaccountName = Page.Request.QueryString["checkaccount"];
                string checkprojectName = Page.Request.QueryString["checkproject"];
                urlSearchPrex += "&checkaccount=" + checkaccountName + "&checkproject=" + checkprojectName;
    
                string urlPrex = url + urlSearchPrex == null ? "?page=" : "?" + urlSearchPrex + "&page=";
                currentpagestr += currentpage > 1 ?
                    "</font><a href=\"" + urlPrex + "1\"><span class=\"disabled\"> First </span></a>&nbsp;&nbsp;&nbsp;<a href=\"" + urlPrex + pre + "\">&nbsp;<span class=\"disabled\"> < Prev </span></a>" : "&nbsp;<span class=\"disabled\"> First </span>";
    
                for (int i = startcount; i <= endcount; i++)
                {
                    currentpagestr += currentpage == i ? "&nbsp;<font color=\"#666666\"><span class=\"disabled\">" + "[&nbsp;" + i + "&nbsp;]" + "</span></font>" : "&nbsp;<a href=\"" + urlPrex + i + "\"><span class=\"ssss\">" + "[&nbsp;" + i + "&nbsp;]" + "</span></a>&nbsp;";
                }
                currentpagestr += currentpage != allcurrentpage ? "&nbsp;&nbsp;<a href=\"" + urlPrex + next + "\"><span class=\"disabled\"> Next ></span></a>&nbsp;&nbsp;<a href=\"" + urlPrex + allcurrentpage + "\">&nbsp;&nbsp;<span class=\"disabled\">   Last </span></a>" : " &nbsp;&nbsp;<font color=\"#666666\"><span class=\"disabled\">  Last </span></font>";
                //currentpagestr += "&nbsp;&nbsp; <input id=\"Text1\" type=\"text\" />";
    
                //currentpagestr += "&nbsp;&nbsp; <a href=\"javascript:CheckStatus();\">GO</a>";
                return currentpagestr;
            }
    
        }
    }

    2、页面调用方法:

    View Code
    <MyRepeater:Repeater ID="Rep_List" runat="server" EnableViewState="false" ShowPagingWhenItemLessThanPageSize="True"
                    OnItemDataBound="Rep_List_ItemDataBound">
                    <HeaderTemplate>
                        <table id="tbMain" width="100%" border="0" cellpadding="0" cellspacing="0" class="content_tb">
                            <thead>
                                <tr>
                                    <th align="left" style="text-align: left">
                                        <input type="checkbox" id="ckboxAll" />
                                    </th>
                                    <th>
                                        <a href="#" id="aSortEmpNo" sort="EmpNo-ASC">Emp No.</a>
                                    </th>
                                    <th>
                                        <a href="#" id="aSortEmailID" sort="EmailID-ASC">Email ID</a>
                                    </th>
                                    <th>
                                        <a href="#" id="aSortRole" sort="Role-ASC">Role</a>
                                    </th>
                                 </tr>
                            </thead>
                            <tbody>
                    </HeaderTemplate>
                    <ItemTemplate>
                        <tr class="search_tr" id="ResourceList" runat="server">
                            <td width="3%" style="white-space: nowrap;">
                                <input type="checkbox" value="<%# Eval("ID") %>" name="ckboxChild" style="display: inline" />
                            </td>
                            <td width="10%" style="text-align: right;">
                                <%# Eval("EmpNo") %>
                                <input type="hidden" value='' />
                            </td>
                            <td width="10%" style="text-align: right;">
                                <%# Eval("EmailID") %>
                                <input type="hidden" value='' />
                            </td>
                              <td width="5%" class="ResourceStyle">
                                <%# Eval("Role") %>
                            </td>
                        </tr>
                    </ItemTemplate>
                    <FooterTemplate>
                        </tbody> </table>
                    </FooterTemplate>
                </MyRepeater:Repeater>

    后台只需要把数据绑定;

    3、常用高效数据库分页存储过程(借用的):

    View Code
    --高效分页存储过程    
      
    CREATE PROCEDURE [dbo].[GetListByPage](   
    @Table nvarchar(500),          --表名   
    @Field nvarchar(500) = '*',        --读取字段   
    @Where  nvarchar(max) = NULL,       --Where条件   
    @GroupBy nvarchar(500) = NULL,      --分组   
    @OrderBy nvarchar(500)= NULL,       --排序字段   
    @PrimaryKeyField nvarchar(50),      --主键必需    
    @PageIndex int = 1,            --开始页码   
    @PageSize int = 10,             --页大小   
    @IsCount bit = 0          --返回记录总数   
      
    ------------------------------------------------------------------------------------------------   
    --当@IsCount为1时,将同时返回2张表,表0为记录总数,表1为查询结果  
    ------------------------------------------------------------------------------------------------   
      
    )   
    AS   
    BEGIN   
        ------------------------------------------------------------------------------------------------   
        DECLARE @strWhere nvarchar(500)                     --Where 条件   
        IF @Where IS NOT NULL AND @Where != ''              --Where 条件   
        BEGIN   
            SET @strWhere = ' WHERE ' + @Where + ' '   
        END   
        ELSE   
        BEGIN   
            SET @strWhere = ''   
        END   
        ----------------------------------------------------------------------------------------------------   
        DECLARE @strGroupBy nvarchar(500)                   --GroupBy 条件   
        IF @GroupBy IS NOT NULL AND @GroupBy != ''          --GroupBy 条件   
        BEGIN   
            SET @strGroupBy = ' GROUP BY ' + @GroupBy + ' '   
        END   
        ELSE   
        BEGIN   
            SET @strGroupBy = ''   
        END   
        ----------------------------------------------------------------------------------------------------   
        DECLARE @strOrderBy nvarchar(500)                   --OrderBy 条件   
        IF @OrderBy IS NULL OR @OrderBy = ''                --OrderBy 条件   
        BEGIN   
            SET @strOrderBy = ' ORDER BY ' + @PrimaryKeyField + ' DESC'   
        END   
        ELSE   
        BEGIN   
            SET @strOrderBy = ' ORDER BY ' + @OrderBy   
        END   
        ----------------------------------------------------------------------------------------------------   
        DECLARE @strSql nvarchar(max)   --Sql 语句   
        --计算总行数   
        IF @IsCount = 1   
        BEGIN   
            SET @strSql= 'SELECT  Count (*) AS RecordCount FROM ' + @Table + @strWhere + @strGroupBy   
            print @strSql  
            EXEC sp_executesql @strSql   
            --RETURN    
        END    
              
        ----------------------------------------------------------------------------------------------------   
        IF @PageIndex < 1                                  --第一页提高性能   
        BEGIN      
            SET @PageIndex = 1   
        END   
      
        IF @PageIndex = 1                             
        BEGIN   
            SET @strSql = 'SELECT TOP ' + str(@PageSize) +  ' ' + @Field + ' FROM ' + @Table +    
                           @strWhere + @strGroupBy + @strOrderBy   
            print @strSql  
            EXEC sp_executesql @strSql   
            RETURN   
        END   
        ----------------------------------------------------------------------------------------------------     
        DECLARE @STARTID nvarchar(50)   
        DECLARE @ENDID nvarchar(50)   
        SET @STARTID = convert(nvarchar(50),(@PageIndex - 1) * @PageSize + 1)   
        SET @ENDID = convert(nvarchar(50),@PageIndex * @PageSize)   
        SET @strSql = 'WITH MYTABLE AS (SELECT ROW_NUMBER() OVER (' + @strOrderBy + ')   
                       AS RowNumber,' + @Field + ' FROM '+ @Table +  @strWhere + @strGroupBy + ')    
                       SELECT * FROM MYTABLE    
                       WHERE RowNumber BETWEEN ' + @STARTID + ' AND ' + @ENDID   
        print @strSql  
        EXEC sp_executesql @strSql   
        --------------------------------------------------------------------------------------------------   
    END  

    4、有上面的存储过程的使用,同样可以在后台实现真分页

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  • 原文地址:https://www.cnblogs.com/52life/p/2949286.html
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