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GridView真分页全套复用代码(转)

时间:2014-07-31 12:37:46      阅读:305      评论:0      收藏:0      [点我收藏+]

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原文地址:GridView真分页全套复用代码作者:jacland

1、页面部分:

<PagerTemplate>                       
    <div style="display: inline; float:right;">                           
        <asp:TextBox ID="txbPage" runat="server" BorderStyle="none" Text=‘<%# "总共"+ TotalRecord.ToString() + "条记录 当前第" + Convert.ToString(PageIndex+1) + "/" + PageCount + "页" %>‘ ReadOnly="true" Width="250"></asp:TextBox>
        <asp:LinkButton ID="FirstPage" runat="server" CausesValidation="false" CommandArgument="First" CommandName="Page" Enable="<%# PageIndex != 0 %>">第一页</asp:LinkButton>
        <asp:LinkButton ID="PreviousPage" runat="server" CommandArgument=‘<%# PageIndex %>‘ CommandName="Page" Enable="<%# PageIndex != 0 %>">上一页</asp:LinkButton>
        <asp:LinkButton ID="NextPage" runat="server" CommandArgument=‘<%# PageIndex + 2 %>‘ CommandName="Page" Enable="<%# PageIndex != PageCount - 1 %>">下一页</asp:LinkButton>
        <asp:LinkButton ID="LastPage" runat="server" CommandArgument=‘<%# PageCount %>‘ CommandName="Page" Enable="<%# PageIndex != PageCount - 1 %>">最后一页</asp:LinkButton>
        <asp:TextBox ID="TextGotoPage" runat="server" CssClass="TextBox" Width="30"></asp:TextBox>
        <asp:Button ID="PageGo" causesvalidation="False" commandargument="-1" commandname="Page" runat="server" CssClass="Button" Text="Go" Width="25" /></div>

</PagerTemplate>

2、页面代码字段属性

    private int totalRcord = 0;
    private int pageIndex = 0;

    /// <summary>
    /// GridView的当前页,存储在ViewState中
    /// </summary>
    protected int PageIndex
    {
        get
        {
            if (int.TryParse(ViewState["pageIndex"].ToString(), out pageIndex))
            {
                return pageIndex;
            }
            else
            {
                return 0;
            }
        }
        set
        {
            ViewState.Add("pageIndex", value);
        }
    }

    /// <summary>
    /// 页数总计
    /// </summary>
    protected int PageCount
    {
        get { return Convert.ToInt32(Math.Ceiling(Convert.ToDecimal(TotalRecord) / gvwBudInfo.PageSize)); }
    }

    /// <summary>
    /// 记录总条数
    /// </summary>
    protected int TotalRecord
    {
        get
        {
            if (int.TryParse(ViewState["totalRecord"].ToString(), out totalRcord))
            {
                return totalRcord;
            }
            else
            {
                return 0;
            }
        }
        set
        {
            ViewState.Add("totalRecord", value);
        }
    }

3、数据绑定

DataSet ds = new BLL().QueryInfo(model, gvw.PageSize, PageIndex, out totalRcord);
gvw.PageIndex = PageIndex == 0 ? 0 : 1;//跳过前面空行
TotalRecord = totalRcord;
gvw.DataSource = ds;

4、翻页事件

        GridView theGrid = (GridView)sender;
        int newPageIndex = 0;
        GridViewRow pagerRow = theGrid.BottomPagerRow;
        //GridViewRow pagerRow = theGrid.Controls[0].Controls[theGrid.Controls[0].Controls.Count - 1] as GridViewRow; // refer to PagerTemplate
        //GridView较DataGrid提供了更多的API,获取分页块可以使用BottomPagerRow 或者TopPagerRow,当然还增加了HeaderRow和FooterRow
        if (-2 == e.NewPageIndex)//点击按钮的事件
        {
            TextBox txtNewPageIndex = null;
            if (null != pagerRow)
            {
                // refer to the TextBox with the NewPageIndex value
                txtNewPageIndex = (TextBox)pagerRow.FindControl("TextGotoPage");
            }
            if (null != txtNewPageIndex && txtNewPageIndex.Text != "")
            {
                newPageIndex = int.Parse(txtNewPageIndex.Text) - 1;//Get the NewPageIndex
            }
            else
            {
                newPageIndex = 0;
            }
        }
        else
        {
            //当点击分页连接的时候
            newPageIndex = e.NewPageIndex;
        }
        //处理超出范围的分页
        newPageIndex = newPageIndex < 0 ? 0 : newPageIndex;
        newPageIndex = newPageIndex >= PageCount ? PageCount - 1 : newPageIndex;

        ((TextBox)pagerRow.FindControl("TextGotoPage")).Text = Convert.ToString(newPageIndex + 1);
        //绑定数据源
        PageIndex = newPageIndex;
        BindInfo();

5、数据操作层

StringBuilder sb = new StringBuilder(" 1 = 1 ");
            if (!string.IsNullOrEmpty(model.YY))    //年度
            {
                sb.Append(string.Format(" AND yy = ‘{0}‘ ", model.YY.Replace("‘", "‘‘")));
            }
            //……//查询条件

            SqlParameter[] parameters =
                {
                    new SqlParameter("@tblName", SqlDbType.VarChar),
                    new SqlParameter("@PKName", SqlDbType.VarChar),
                    new SqlParameter("@PageSize", SqlDbType.Int),
                    new SqlParameter("@PageIndex", SqlDbType.Int),
                    new SqlParameter("@OrderField_Type", SqlDbType.VarChar),
                    new SqlParameter("@strWhere", SqlDbType.VarChar),                   
                    new SqlParameter("@FieldList", SqlDbType.VarChar),
                    new SqlParameter("@TotalRecord", SqlDbType.Int),
                };

            parameters[0].Value = "v_AppBudInfo";//表名或视图名
            parameters[1].Value = "yy,subID,deptID";//主键及排序字段,逗号后不可有空格
            parameters[2].Value = pageSize;
            parameters[3].Value = pageIndex + 1;
            parameters[4].Value = "yy asc,deptID asc,subID asc";//区分大小写, asc,desc必小写,逗号后不可有空格
            parameters[5].Value = sb.ToString();
            parameters[6].Value = "yy,subID,subName,compID,compName,deptID,DeptName,budtotal,qbudtotal,payouttotal,qpayouttotal,lybudamt,budamt,sbudamt,remark,setdate,userid,downdate,uptodate,upuserid,auddate,auduserid,cleartype,cleartypeName";
            parameters[7].Direction = ParameterDirection.Output; //查询字段,逗号后不可有空格

            using (SqlConnection conn = new SqlConnection(SqlHelper.ConnectionStringProfile))
            {
                try
                {
                    conn.Open();
                    SqlCommand cmd = new SqlCommand("GetRecordByPage", conn);
                    cmd.CommandType = CommandType.StoredProcedure;
                    cmd.Parameters.AddRange(parameters);                   
                    SqlDataAdapter da = new SqlDataAdapter(cmd);
                    DataSet ds = new DataSet();
                    da.Fill(ds);
                    totalRecord = Convert.ToInt32(parameters[7].Value);
                    if (totalRecord > 0 && ds.Tables[0].Rows.Count == 0)
                    {//当删除最后一行数据时,可能引起页数变化,重新查询最后一页
                        parameters[3].Value = Math.Ceiling(Convert.ToDecimal(totalRecord) / pageSize);
                        da.Fill(ds);
                    }
                    //生成伪数据,便于使GridView显示分页栏
                    for (int i = 0; i < (pageIndex == 0 ? 0 : pageSize); i++)
                    {
                        ds.Tables[0].Rows.InsertAt(ds.Tables[0].NewRow(), 0);
                    }
                    if (totalRecord > (pageIndex + 1) * pageSize)
                    {
                        ds.Tables[0].Rows.Add(ds.Tables[0].NewRow());
                    }                           
                    return ds;
                }
                catch (SqlException)
                {
                    totalRecord = 0;
                    return null;
                }
            }

6、存储过程

CREATE   PROCEDURE GetRecordByPage
--自写,采用反向排序的方式,非主键或唯一键操作引起严重后果,添加不合理的where条件也是
--字段列表用逗号隔开,不可有任何空格
--排序字段也当作主键字段传入
    @tblName          varchar(255),       -- 表名
    @PKName          varchar(255),       -- 主键字段名
    @PageSize         int = 10,           -- 页尺寸
    @PageIndex        int = 1,            -- 页码   
    @OrderField_Type       varchar(255) = ‘‘,  -- 排序字段及方式,用逗号隔开, asc,desc必须小写
    @strWhere         varchar(1000) = ‘‘, -- 查询条件 (注意: 不要加 where)   
    @FieldList        varchar(1000)  ,      -- 返回的字段,用逗号隔开
    @TotalRecord    int = 0      out      -- 返回记录总数
AS

declare @strSQL   varchar(6000)       -- 主语句
declare @strTmp   varchar(400)        -- 临时逆向排序表达
declare @strOrder varchar(400)        -- 排序子句
declare @RecordCount integer          -- 记录总数

if @PageSize < 1    --页面大小不小于1
    set @PageSize = 10;

if @PageIndex < 1    --页码不小于1
    set @PageIndex = 1

if @strWhere != ‘‘    --生成where条件
    set @strWhere = ‘ where ‘ + @strWhere

--查询总数
    set @strSQL = ‘select @Count = count(*) from [‘ + @tblName + ‘] ‘+ @strWhere

    declare @a nvarchar(4000)    --把@strSQL转换为nvarchar的临时变量
    set @a = cast(@strSQL as nvarchar(4000))

    exec sp_executesql @a,N‘@Count int output‘,@RecordCount output
    set @TotalRecord = @RecordCount
--查询记录       
        if @PageIndex = 1    --页数为第1页时,直接查询
            begin
                if @OrderField_Type != ‘‘    --有排序字段
                    set @strOrder = ‘ order by ‘ + @OrderField_Type
                else            --无排序字段
                    set @strOrder = ‘ order by ‘ + @PKName +‘ ‘

                set @strSQL = ‘select top ‘ + str(@PageSize) + ‘ ‘ + @FieldList + ‘ from [‘+ @tblName + ‘] ‘ + @strWhere + ‘ ‘ + @strOrder
            end
        else
            begin
                if @OrderField_Type != ‘‘    --有排序字段
                    begin                        --此处区分大小写!!!!
                        set @strTmp = replace(@OrderField_Type, ‘asc‘, ‘temp‘)
                        set @strTmp = replace(@strTmp, ‘desc‘, ‘asc‘)
                        set @strTmp = replace(@strTmp, ‘temp‘, ‘desc‘)
                        --把排序字段加上前缀                   
                        set @strOrder = ‘ order by ‘+ @tblName + ‘.‘ + replace(@OrderField_Type, ‘,‘, ‘,‘ + @tblName + ‘.‘)               
                        set @strTmp = ‘ order by temp.‘ + replace(@strTmp, ‘,‘, ‘,temp.‘)
                    end                   

                 if @RecordCount < (@PageIndex*@PageSize)    --根据记录总条数决定PageSize大小
                    set @RecordCount = @RecordCount - (@PageIndex - 1) * @PageSize
                else
                    set @RecordCount = @PageSize           
                --把字段列表中的主键加上表名前缀 --生成内联条件
                declare @joinField varchar(500)    --内联条件
                declare @i int    --字符旧位置       
                set @i = 0
                declare @index int --字符新位置
                set @index = charindex(‘,‘,@PKName, 0)
                if @index = 0    --没有逗号,只有一个字段
                    begin
                        set @FieldList = ‘,‘ + @FieldList    --加个逗号,区分完整字段
                        set @FieldList = replace(@FieldList,‘,‘ +  @PKName + ‘,‘ ,‘,‘ +  @tblName + ‘.‘ + @PKName + ‘,‘)
                        set @FieldList = substring(@FieldList, 2, Len(@FieldList) - 1)
                        set @joinField = @tblName + ‘.‘ + @PKName + ‘ =  temp2.‘ + @PKName
                    end
                else    --有多个字段
                    begin
                        set @joinField = ‘ 1 = 1 ‘   
                        set @FieldList = ‘,‘ + @FieldList    --加个逗号,区分完整字段
                        declare @PKTemp varchar(255)--临时主键列表           
                        WHILE @index > 0
                        BEGIN                           
                            set @PKTemp = substring(@PKName, @i + 1, @index-@i - 1) --左边第一个字段
                            set @joinField = @joinField + ‘ AND ‘ + @tblName + ‘.‘ + @PKTemp + ‘ =  temp2.‘ + @PKTemp --生成内联条件
                            set @FieldList = replace(@FieldList,‘,‘ +  @PKTemp + ‘,‘ ,‘,‘ + @tblName + ‘.‘ + @PKTemp + ‘,‘) --替换
                            set @i = @index
                            set @index = charindex(‘,‘, @PKName, @i+1)--下一个逗号  
                        END
                        set @PKTemp = substring(@PKName, @i + 1, len(@PKName)-@i) --左边第一个字段
                        set @joinField = @joinField + ‘ AND ‘ + @tblName + ‘.‘ + @PKTemp + ‘ = temp2.‘ + @PKTemp --生成内联条件
                        set @FieldList = replace(@FieldList,‘,‘ +  @PKTemp + ‘,‘ ,‘,‘ +  @tblName + ‘.‘ + @PKTemp + ‘,‘) --替换
                        set @FieldList = substring(@FieldList, 2, Len(@FieldList) - 1)
                    end

                --把主键列表加上表名前缀
                set @PKName = @tblName + ‘.‘ + @PKName;--给第一个主键加上表名前缀
                set @PKName = replace(@PKName, ‘,‘, ‘,‘ + @tblName + ‘.‘)--给后面的主键加上表名前缀       

                set @strSQL = ‘select top ‘+str(@RecordCount)+‘ ‘+@FieldList+‘ from [‘+@tblName+‘] inner join
                        (select top ‘+str(@RecordCount)+‘ ‘+replace(@PKName, @tblName , ‘temp‘)+‘ from
                            (select top ‘+str(@PageIndex*@PageSize)+‘ ‘+@PKName+‘ from [‘+@tblName+‘] ‘+@strWhere+‘ ‘+@strOrder+‘ ) as temp
                           ‘+@strTmp+‘
                        )  as temp2 on ‘ + @joinField + ‘ ‘ + @strOrder+‘ ‘
            end
exec (@strSQL)
GO

GridView真分页全套复用代码(转),布布扣,bubuko.com

GridView真分页全套复用代码(转)

标签:des   style   blog   http   使用   os   strong   io   

原文地址:http://www.cnblogs.com/lschenblog/p/3880081.html

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