winform 分页控件

以前都是从事B/S开发，由于公司有个比较大的C/S项目，在使用DATAGRIDVIEW的时候，显示数据量比较大，所以才用分页模式，也不知道这样是否正确。

想找个C/S下面的分页控件，都没有什么好的，就自己跟B/S下的分页控件，修改成WINFORM下面的。

首先创建一个用户控件名称为pager,在控件中拖入bindingNavigator和bindingSource，修改bindingNavigator，加入必要的一些控件。

效果如下：

代码实现如下：

 

namespace  WindowsApp.MyControl
{
    /**//// <summary>
    /// 申明委托
    /// </summary>
    /// <param name="e"></param>
    /// <returns></returns>
    public delegate int EventPagingHandler(EventPagingArg e);
    /**//// <summary>
    /// 分页控件呈现
    /// </summary>
    public partial class Pager : UserControl
    {
        public Pager()
        {
            InitializeComponent();
        }
        public event EventPagingHandler EventPaging;
        /**//// <summary>
        /// 每页显示记录数
        /// </summary>
        private int _pageSize = 20;
        /**//// <summary>
        /// 每页显示记录数
        /// </summary>
        public int PageSize
        {
            get { return _pageSize; }
            set
            {
                _pageSize = value;
                GetPageCount();
            }
        }

        private int _nMax = 0;
        /**//// <summary>
        /// 总记录数
        /// </summary>
        public int NMax
        {
            get { return _nMax; }
            set
            {
                _nMax = value;
                GetPageCount();
            }
        }

        private int _pageCount = 0;
        /**//// <summary>
        /// 页数=总记录数/每页显示记录数
        /// </summary>
        public int PageCount
        {
            get { return _pageCount; }
            set { _pageCount = value; }
        }

        private int _pageCurrent = 0;
        /**//// <summary>
        /// 当前页号
        /// </summary>
        public int PageCurrent
        {
            get { return _pageCurrent; }
            set { _pageCurrent = value; }
        }


        private void GetPageCount()
        {
            if (this.NMax > 0)
            {
                this.PageCount = Convert.ToInt32(Math.Ceiling(Convert.ToDouble(this.NMax) / Convert.ToDouble(this.PageSize)));
            }
            else
            {
                this.PageCount = 0;
            }
        }

        /**//// <summary>
        /// 翻页控件数据绑定的方法
        /// </summary>
        public void Bind()
        {
            if (this.EventPaging != null)
            {
                this.NMax = this.EventPaging(new EventPagingArg(this.PageCurrent));
            }

            if (this.PageCurrent > this.PageCount)
            {
                this.PageCurrent = this.PageCount;
            }
            if (this.PageCount == 1)
            {
                this.PageCurrent = 1;
            }
            lblPageCount.Text = this.PageCount.ToString();
            this.lblMaxPage.Text = "共"+this.NMax.ToString()+"条记录";
            this.txtCurrentPage.Text = this.PageCurrent.ToString();

            if (this.PageCurrent == 1)
            {
                this.btnPrev.Enabled = false;
                this.btnFirst.Enabled = false;
            }
            else
            {
                btnPrev.Enabled = true;
                btnFirst.Enabled = true;
            }

            if (this.PageCurrent == this.PageCount)
            {
                this.btnLast.Enabled = false;
                this.btnNext.Enabled = false;
            }
            else
            {
                btnLast.Enabled = true;
                btnNext.Enabled = true;
            }

            if (this.NMax == 0)
            {
                btnNext.Enabled = false;
                btnLast.Enabled = false;
                btnFirst.Enabled = false;
                btnPrev.Enabled = false;
            }
        }

        private void btnFirst_Click(object sender, EventArgs e)
        {
            PageCurrent = 1;
            this.Bind();
        }

        private void btnPrev_Click(object sender, EventArgs e)
        {
            PageCurrent -= 1;
            if (PageCurrent <= 0)
            {
                PageCurrent = 1;
            }
            this.Bind();
        }

        private void btnNext_Click(object sender, EventArgs e)
        {
            this.PageCurrent += 1;
            if (PageCurrent > PageCount)
            {
                PageCurrent = PageCount;
            }
            this.Bind();
        }

        private void btnLast_Click(object sender, EventArgs e)
        {
            PageCurrent = PageCount;
            this.Bind();
        }

        private void btnGo_Click(object sender, EventArgs e)
        {
            if (this.txtCurrentPage.Text != null && txtCurrentPage.Text != "")
            {
                if (Int32.TryParse(txtCurrentPage.Text, out _pageCurrent))
                {
                    this.Bind();
                }
                else
                {
                    Common.MessageProcess.ShowError("输入数字格式错误！");
                }
            }
        }

    }
    /**//// <summary>
    /// 自定义事件数据基类
    /// </summary>
    public class EventPagingArg : EventArgs
    {
        private int _intPageIndex;
        public EventPagingArg(int PageIndex)
        {
            _intPageIndex = PageIndex;
        }
    }
}

 

控件功能基本实现。

如何绑定数据呢？

大数量分页，使用存储过程。

这个存储过程是网络上考的，呵呵。我把它给贴出来，希望原作者别砸我砖头。。。。。

 

ALTER      PROCEDURE  SP_Pagination
/**/ /*
***************************************************************
** 千万数量级分页存储过程 **
***************************************************************
参数说明:
1.Tables :表名称,视图
2.PrimaryKey :主关键字
3.Sort :排序语句，不带Order By 比如：NewsID Desc,OrderRows Asc
4.CurrentPage :当前页码
5.PageSize :分页尺寸
6.Filter :过滤语句，不带Where 
7.Group :Group语句,不带Group By
效果演示：http://www.cn5135.com/_App/Enterprise/QueryResult.aspx
***************************************************************/
(
@Tables   varchar ( 2000 ),
@PrimaryKey   varchar ( 500 ),
@Sort   varchar ( 500 )  =   NULL ,
@CurrentPage   int   =   1 ,
@PageSize   int   =   10 ,
@Fields   varchar ( 2000 )  =   ' * ' ,
@Filter   varchar ( 1000 )  =   NULL ,
@Group   varchar ( 1000 )  =   NULL
)
AS
/**/ /*默认排序*/
IF   @Sort   IS   NULL   OR   @Sort   =   ''
SET   @Sort   =   @PrimaryKey
DECLARE   @SortTable   varchar ( 1000 )
DECLARE   @SortName   varchar ( 1000 )
DECLARE   @strSortColumn   varchar ( 1000 )
DECLARE   @operator   char ( 2 )
DECLARE   @type   varchar ( 1000 )
DECLARE   @prec   int
/**/ /*设定排序语句.*/
IF   CHARINDEX ( ' DESC ' , @Sort ) > 0
BEGIN
SET   @strSortColumn   =   REPLACE ( @Sort ,  ' DESC ' ,  '' )
SET   @operator   =   ' <= '
END
ELSE
BEGIN
IF   CHARINDEX ( ' ASC ' ,  @Sort )  =   0
SET   @strSortColumn   =   REPLACE ( @Sort ,  ' ASC ' ,  '' )
SET   @operator   =   ' >= '
END
IF   CHARINDEX ( ' . ' ,  @strSortColumn )  >   0
BEGIN
SET   @SortTable   =   SUBSTRING ( @strSortColumn ,  0 ,  CHARINDEX ( ' . ' , @strSortColumn ))
SET   @SortName   =   SUBSTRING ( @strSortColumn ,  CHARINDEX ( ' . ' , @strSortColumn )  +   1 ,  LEN ( @strSortColumn ))
END
ELSE
BEGIN
SET   @SortTable   =   @Tables
SET   @SortName   =   @strSortColumn
END
SELECT   @type = t.name,  @prec = c.prec
FROM  sysobjects o 
JOIN  syscolumns c  on  o.id = c.id
JOIN  systypes t  on  c.xusertype = t.xusertype
WHERE  o.name  =   @SortTable   AND  c.name  =   @SortName
IF   CHARINDEX ( ' char ' ,  @type )  >   0
SET   @type   =   @type   +   ' ( '   +   CAST ( @prec   AS   varchar )  +   ' ) '
DECLARE   @strPageSize   varchar ( 500 )
DECLARE   @strStartRow   varchar ( 500 )
DECLARE   @strFilter   varchar ( 1000 )
DECLARE   @strSimpleFilter   varchar ( 1000 )
DECLARE   @strGroup   varchar ( 1000 )
/**/ /*默认当前页*/
IF   @CurrentPage   <   1
SET   @CurrentPage   =   1
/**/ /*设置分页参数.*/
SET   @strPageSize   =   CAST ( @PageSize   AS   varchar ( 500 ))
SET   @strStartRow   =   CAST ((( @CurrentPage   -   1 ) * @PageSize   +   1 )  AS   varchar ( 500 ))
/**/ /*筛选以及分组语句.*/
IF   @Filter   IS   NOT   NULL   AND   @Filter   !=   ''
BEGIN
SET   @strFilter   =   '  WHERE  '   +   @Filter   +   '   '
SET   @strSimpleFilter   =   '  AND  '   +   @Filter   +   '   '
END
ELSE
BEGIN
SET   @strSimpleFilter   =   ''
SET   @strFilter   =   ''
END
IF   @Group   IS   NOT   NULL   AND   @Group   !=   ''
SET   @strGroup   =   '  GROUP BY  '   +   @Group   +   '   '
ELSE
SET   @strGroup   =   ''
/**/ /*执行查询语句*/
EXEC (
'
DECLARE @SortColumn  '   +   @type   +   '
SET ROWCOUNT  '   +   @strStartRow   +   '
SELECT @SortColumn= '   +   @strSortColumn   +   '  FROM  '   +   @Tables   +   @strFilter   +   '   '   +   @strGroup   +   '  ORDER BY  '   +   @Sort   +   '
SET ROWCOUNT  '   +   @strPageSize   +   '
SELECT  '   +   @Fields   +   '  FROM  '   +   @Tables   +   '  WHERE  '   +   @strSortColumn   +   @operator   +   '  @SortColumn  '   +   @strSimpleFilter   +   '   '   +   @strGroup   +   '  ORDER BY  '   +   @Sort   +   '
'
)

 

使用该存储过陈，得到数据，将数据绑定到数据控件，提供了一个pageData类

     /**/ /// <summary>
    /// 数据源提供
    /// </summary>
     public   class  PageData
     {
        private int _PageSize = 10;
        private int _PageIndex = 1;
        private int _PageCount = 0;
        private int _TotalCount = 0;
        private string _TableName;//表名
        private string _QueryFieldName = "*";//表字段FieldStr
        private string _OrderStr = string.Empty; //排序_SortStr
        private string _QueryCondition = string.Empty;//查询的条件 RowFilter
        private string _PrimaryKey = string.Empty;//主键
        /**//// <summary>
        /// 显示页数
        /// </summary>
        public int PageSize
        {
            get
            {
                return _PageSize;

            }
            set
            {
                _PageSize = value;
            }
        }
        /**//// <summary>
        /// 当前页
        /// </summary>
        public int PageIndex
        {
            get
            {
                return _PageIndex;
            }
            set
            {
                _PageIndex = value;
            }
        }
        /**//// <summary>
        /// 总页数
        /// </summary>
        public int PageCount
        {
            get
            {
                return _PageCount;
            }
        }
        /**//// <summary>
        /// 总记录数
        /// </summary>
        public int TotalCount
        {
            get
            {
                return _TotalCount;
            }
        }
        /**//// <summary>
        /// 表名，包括视图
        /// </summary>
        public string TableName
        {
            get
            {
                return _TableName;
            }
            set
            {
                _TableName = value;
            }
        }
        /**//// <summary>
        /// 表字段FieldStr
        /// </summary>
        public string QueryFieldName
        {
            get
            {
                return _QueryFieldName;
            }
            set
            {
                _QueryFieldName = value;
            }
        }
        /**//// <summary>
        /// 排序字段
        /// </summary>
        public string OrderStr
        {
            get
            {
                return _OrderStr;
            }
            set
            {
                _OrderStr = value;
            }
        }
        /**//// <summary>
        /// 查询条件
        /// </summary>
        public string QueryCondition
        {
            get
            {
                return _QueryCondition;
            }
            set
            {
                _QueryCondition = value;
            }
        }
        /**//// <summary>
        /// 主键
        /// </summary>
        public string PrimaryKey
        {
            get {
                return _PrimaryKey;
            }
            set {
                _PrimaryKey = value;
            }
        }
        public DataSet QueryDataTable()
        {
            SqlParameter[] parameters = {
                    new SqlParameter("@Tables", SqlDbType.VarChar, 255),
                    new SqlParameter("@PrimaryKey" , SqlDbType.VarChar , 255),    
                    new SqlParameter("@Sort", SqlDbType.VarChar , 255 ),
                    new SqlParameter("@CurrentPage", SqlDbType.Int),
                    new SqlParameter("@PageSize", SqlDbType.Int),                                    
                    new SqlParameter("@Fields", SqlDbType.VarChar, 255),
                    new SqlParameter("@Filter", SqlDbType.VarChar,1000),
                    new SqlParameter("@Group" ,SqlDbType.VarChar , 1000 )
                    };
            parameters[0].Value = _TableName;
            parameters[1].Value = _PrimaryKey;
            parameters[2].Value = _OrderStr;
            parameters[3].Value = PageIndex;
            parameters[4].Value = PageSize;
            parameters[5].Value =_QueryFieldName;
            parameters[6].Value = _QueryCondition;
            parameters[7].Value = string.Empty;
            DataSet ds = DbHelperSQL.RunProcedure("SP_Pagination", parameters, "dd");
            _TotalCount = GetTotalCount();
            if (_TotalCount == 0)
            {
                _PageIndex = 0;
                _PageCount = 0;
            }
            else
            {
                _PageCount = _TotalCount % _PageSize == 0 ? _TotalCount / _PageSize : _TotalCount / _PageSize + 1;
                if (_PageIndex > _PageCount)
                {
                    _PageIndex = _PageCount;

                    parameters[4].Value = _PageSize;

                    ds = QueryDataTable();
                }
            }
            return ds;
        }

        public int GetTotalCount()
        {
            string strSql = " select count(1) from "+_TableName;
            if (_QueryCondition != string.Empty)
            {
                strSql +=" where " + _QueryCondition;
            }
            return int.Parse(DbHelperSQL.GetSingle(strSql).ToString());
        }
    }

 

好了，在页面放个DATAGRIDVIEW 拖入控件pager

 

 

   private   void  ReceiveOrderJLForm_Load( object  sender, EventArgs e)
         {
            this.pager1.PageCurrent = 1;
            this.pager1.Bind();
        }
         private   int  dgvBind()
         {
            WindowsApp.MyControl.PageData pageData = new WindowsApp.MyControl.PageData();
            pageData.TableName = "T_ReceiveOrder";
            pageData.PrimaryKey = "ReceiveOrderID";
            pageData.OrderStr = "ReceiveOrderID desc";
            pageData.PageIndex = this.pager1.PageCurrent;
            pageData.PageSize = this.pager1.PageSize;
            pageData.QueryCondition = _strSql + strWhere.ToString();
            pageData.QueryFieldName = "*";

            this.pager1.bindingSource.DataSource = pageData.QueryDataTable().Tables[0];
            this.pager1.bindingNavigator.BindingSource = pager1.bindingSource;
            dgvReceiveOrder.AutoGenerateColumns = false;
            dgvReceiveOrder.DataSource = this.pager1.bindingSource;
            return pageData.TotalCount;
        }
         private   int  pager1_EventPaging(WindowsApp.MyControl.EventPagingArg e)
         {
            return dgvBind();
        }

 效果如下

 

 

 

http://files.cnblogs.com/nosnowwolf/Pager.rar 控件下载