实现分页控件的代码非常的简单，下面直接给出全部源码，大家可以参考下，整个分页控件的源码如下：
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using System;
using System.ComponentModel;
using System.Windows.Forms;
namespace RDIFramework.Controls
{ public delegate void PageChangedEventHandler(object sender, EventArgs e);
/// <summary>
/// 分页用户控件，仅提供分页信息显示及改变页码操作
/// </summary>
public partial class UcPagerEx : UserControl
{ public event PageChangedEventHandler PageChanged;
private int _pageSize;
private int m_PageCount;
private int _recordCount;
private int _pageIndex;
public UcPagerEx()
{
InitializeComponent();
this._pageSize = 10;
this._recordCount = 0;
this._pageIndex = 1; //默认为第一页
}
/// <summary>
/// 带参数的构造函数
/// <param name="pageSize">每页记录数</param>
/// <param name="recordCount">总记录数</param>
/// </summary>
public UcPagerEx(int recordCount, int pageSize)
{
InitializeComponent();
this._pageSize = pageSize;
this._recordCount = recordCount;
this._pageIndex = 1; //默认为第一页
this.InitPageInfo();
}
protected virtual void OnPageChanged(EventArgs e)
{
if (PageChanged != null)
{
InitPageInfo();
PageChanged(this, e);
}
}
[Description("设置或获取一页中显示的记录数目"), DefaultValue(20), Category("分页")]
public int PageSize
{
set
{
this._pageSize = value;
}
get
{
return this._pageSize;
}
}
[Description("获取记录总页数"), DefaultValue(0), Category("分页")]
public int PageCount
{
get
{
return this.m_PageCount;
}
}
[Description("设置或获取记录总数"), Category("分页")]
public int RecordCount
{
set
{
this._recordCount = value;
}
get
{
return this._recordCount;
}
}
[Description("当前的页面索引, 开始为1"), DefaultValue(0), Category("分页")]
[Browsable(false)]
public int PageIndex
{
set
{
this._pageIndex = value;
}
get
{
return this._pageIndex;
}
}
/// <summary>
/// 初始化分页信息
/// <param name="pageSize">每页记录数</param>
/// <param name="recordCount">总记录数</param>
/// </summary>
public void InitPageInfo(int recordCount, int pageSize)
{
this._recordCount = recordCount;
this._pageSize = pageSize;
this.InitPageInfo();
}
/// <summary>
/// 初始化分页信息
/// <param name="recordCount">总记录数</param>
/// </summary>
public void InitPageInfo(int recordCount)
{
this._recordCount = recordCount;
this.InitPageInfo();
}
/// <summary>
/// 初始化分页信息
/// </summary>
public void InitPageInfo()
{
if (this._pageSize < 1)
this._pageSize = 10; //如果每页记录数不正确，即更改为10
if (this._recordCount < 0)
this._recordCount = 0; //如果记录总数不正确，即更改为0
//取得总页数
if (this._recordCount % this._pageSize == 0)
{
this.m_PageCount = this._recordCount / this._pageSize;
}
else
{
this.m_PageCount = this._recordCount / this._pageSize + 1;
}
//设置当前页
if (this._pageIndex > this.m_PageCount)
{
this._pageIndex = this.m_PageCount;
}
if (this._pageIndex < 1)
{
this._pageIndex = 1;
}
//设置上一页按钮的可用性
bool enable = (this.PageIndex > 1);
this.btnPrevious.Enabled = enable;
//设置首页按钮的可用性
enable = (this.PageIndex > 1);
this.btnFirst.Enabled = enable;
//设置下一页按钮的可用性
enable = (this.PageIndex < this.PageCount);
this.btnNext.Enabled = enable;
//设置末页按钮的可用性
enable = (this.PageIndex < this.PageCount);
this.btnLast.Enabled = enable;
this.txtPageIndex.Text = this._pageIndex.ToString();
this.lblPageInfo.Text = string.Format("共 {0} 条记录，每页 {1} 条，共 {2} 页", this._recordCount, this._pageSize, this.m_PageCount);
}
public void RefreshData(int page)
{
this._pageIndex = page;
EventArgs e = new EventArgs();
OnPageChanged(e);
}
private void btnFirst_Click(object sender, System.EventArgs e)
{
this.RefreshData(1);
}
private void btnPrevious_Click(object sender, System.EventArgs e)
{
if (this._pageIndex > 1)
{
this.RefreshData(this._pageIndex - 1);
}
else
{
this.RefreshData(1);
}
}
private void btnNext_Click(object sender, System.EventArgs e)
{
if (this._pageIndex < this.m_PageCount)
{
this.RefreshData(this._pageIndex + 1);
}
else if (this.m_PageCount < 1)
{
this.RefreshData(1);
}
else
{
this.RefreshData(this.m_PageCount);
}
}
private void btnLast_Click(object sender, System.EventArgs e)
{
this.RefreshData(this.m_PageCount > 0 ? this.m_PageCount : 1);
}
private void txtPageIndex_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
int num;
try
{
num = Convert.ToInt16(this.txtPageIndex.Text);
}
catch
{
num = 1;
}
if (num > this.m_PageCount)
num = this.m_PageCount;
if (num < 1)
num = 1;
this.RefreshData(num);
}
}
}
} |
代码基本没有什么难度，相信大家都能看得懂，那么如何使用这个控件呢？
首先在生成的工具箱中拖动这个分页控件到界面上，再后再做数据绑定的代码即可。我直接展示一个已经做成的界面，如下图所示：
上面就是分页的效果，如何实现的呢？下面给出实现代码。
我们可以在Load事件中调用下面的Search()方法对数据进行绑定，如下代码所示：
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private void Search()
{ var recordCount = 0;
this.DTProductInfo = GetData(out recordCount, ucPager.PageIndex, ucPager.PageSize, this.searchValue);
ucPager.RecordCount = recordCount;
ucPager.InitPageInfo();
// 加载绑定数据
this.GetList();
}private DataTable GetData(out int recordCount, int pageIndex, int pageSize,string search)
{ return new ProductInfoManager(dbProvider).GetDTByPage(out recordCount, pageIndex, pageSize, search,ProductInfoTable.FieldCreateOn + " DESC ");
}public override void GetList()
{ this.dgvProductInfo.AutoGenerateColumns = false;
if (this.DTProductInfo.Columns.Count > 0)
{
this.DTProductInfo.DefaultView.Sort = ProductInfoTable.FieldCreateOn;
}
this.dgvProductInfo.DataSource = this.DTProductInfo.DefaultView;
this.SetControlState();
} |
同时需要对UcPagerEx的PageChanged事件做处理，以启用用户分页的需求，代码如下：
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private void ucPager_PageChanged(object sender, EventArgs e)
{ var holdCursor = this.Cursor;
this.Cursor = Cursors.WaitCursor;
Search();
this.Cursor = holdCursor;
} |
附注：对于上面的“GetDTByPage”方法可以任意实现，可以调用存储过程，也可以使用代码进行分页。只要返回分页的数据即可。
下面给出一些分页的效果，如下图所示：
本文转自yonghu86 51CTO博客，原文链接：http://blog.51cto.com/yonghu/1599021，如需转载请自行联系原作者