winform 分页控件分享（二）
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();
}
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