Pager.cs
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Data.SqlClient;
using System.Text;
using System.Windows.Forms;
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; }
}
public BindingNavigator ToolBar
{
get { return this.bindingNavigator; }
}
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
{
MessageBox.Show("输入数字格式错误！");
}
}
}
private void txtCurrentPage_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
this.Bind();
}
}
}
/// <summary>
/// 自定义事件数据基类
/// </summary>
public class EventPagingArg : EventArgs
{
private int _intPageIndex;
public EventPagingArg(int PageIndex)
{
_intPageIndex = PageIndex;
}
}
/// <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
private bool _isQueryTotalCounts = true;//是否查询总的记录条数
/// <summary>
/// 是否查询总的记录条数
/// </summary>
public bool IsQueryTotalCounts
{
get { return _isQueryTotalCounts; }
set { _isQueryTotalCounts = value; }
}
/// <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(String where)
{
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");
//if (_isQueryTotalCounts)
//{
// _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 null;
}
public int GetTotalCount()
{
string strSql = " select count(1) from "+_TableName;
if (_QueryCondition != string.Empty)
{
strSql +=" where " + _QueryCondition;
}
return 0;
}
}
}