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 = ""+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(@strSortColumn0CHARINDEX('.',@strSortColumn))
SET @SortName = SUBSTRING(@strSortColumnCHARINDEX('.',@strSortColumn+ 1LEN(@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 + 1AS 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

 

 

 

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

posted on 2010-11-02 14:43  米高佐敦  阅读(626)  评论(2编辑  收藏  举报