自定义分页控件

 运行效果：

控件结构图：

实现代码：

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using System; using System.ComponentModel; using System.Drawing; using System.Text.RegularExpressions; using System.Windows.Forms;   namespace KK.Pagers {     public partial class Pagers : UserControl     {         #region 定义、构造         private int _pageIndex = 1;         /// <summary>         /// 当前页数         /// </summary>         public int PageIndex         {             get { return _pageIndex; }             set { _pageIndex = value; }         }           private int _pageSize;         /// <summary>         /// 每一页显示的数据量         /// </summary>         public int PageSize         {             get { return _pageSize; }             set { _pageSize = value; }         }           private int _pageCount;         /// <summary>         /// 总数据数         /// </summary>         public int PageCount         {             get             {                 if (PageSize != 0)                 {                     _pageCount = GetPageCount();                 }                 return _pageCount;             }         }           private int _totalCount = 20;         /// <summary>         /// 总数         /// </summary>         public int TotalCount         {             get { return _totalCount; }             set             {                 _totalCount = value;             }         }           /// <summary>         /// 首页背景图         /// </summary>         public Image FirstBackgroundImage         {             get { return pboxFirst.Image; }             set             {                 pboxFirst.Image = value;             }         }           /// <summary>         /// 上一页背景图         /// </summary>         public Image LastBackgroundImage         {             get { return this.pboxUp.Image; }             set             {                 pboxUp.Image = value;             }         }           /// <summary>         /// 下一个背景图         /// </summary>         public Image NextBackgroundImage         {             get { return this.pboxNext.Image; }             set             {                 pboxNext.Image = value;             }         }           /// <summary>         /// 尾页背景图         /// </summary>         public Image EndBackgroundImage         {             get { return this.pboxEnd.Image; }             set             {                 pboxEnd.Image = value;             }         }           /// <summary>         /// 构造         /// </summary>         public Pagers()         {             InitializeComponent();             this.Load += Pagers_Load;         }           #endregion           #region event           void Pagers_Load(object sender, EventArgs e)         {             if (PageIndex <= 0)                 PageIndex = 1;         }           [Browsable(true), Description("分页改变事件"), Category("操作")]         public event EventHandler OnPageChanged;         //首页         private void pboxPageFirst_Click(object sender, EventArgs e)         {             PageIndex = 1;             DrawControl(true);         }           //上一页         private void pboxPre_Click(object sender, EventArgs e)         {             if (PageIndex > 1)             {                 PageIndex--;             }               DrawControl(true);         }           //下一页         private void pboxNext_Click(object sender, EventArgs e)         {             if (PageIndex < PageCount)             {                 PageIndex++;             }               DrawControl(true);         }           //尾页         private void pboxLast_Click(object sender, EventArgs e)         {             PageIndex = PageCount;             DrawControl(true);         }           private void ctboxCurrentPageIndex_KeyDown(object sender, KeyEventArgs e)         {             if (e.KeyCode == Keys.Enter)             {                 int page = -1;                 if (int.TryParse(ctboxCurrentPageIndex.Text, out page)                     && int.Parse(ctboxCurrentPageIndex.Text) > 0                     && int.Parse(ctboxCurrentPageIndex.Text) <= PageCount                     && PageIndex != int.Parse(ctboxCurrentPageIndex.Text))                 {                     PageIndex = int.Parse(ctboxCurrentPageIndex.Text);                     DrawControl(true);                 }                 else                 {                     ctboxCurrentPageIndex.Text = PageIndex.ToString();                     ctboxCurrentPageIndex.SelectionStart = ctboxCurrentPageIndex.TextLength;                 }             }         }           private void ctboxCurrentPageIndex_TextChanged(object sender, EventArgs e)         {             Regex reg = new Regex("^[0-9]*$");             if (!reg.IsMatch(ctboxCurrentPageIndex.Text))             {                 ctboxCurrentPageIndex.Text = PageIndex.ToString();                 ctboxCurrentPageIndex.SelectionStart = ctboxCurrentPageIndex.TextLength;             }             if (PageCount.Equals(0))             {                 DisplayImage(this.pboxFirst, global::KK.Pagers.Properties.Resources.Page_First1);                 DisplayImage(this.pboxUp, global::KK.Pagers.Properties.Resources.Page_Last1);                 DisplayImage(this.pboxNext, global::KK.Pagers.Properties.Resources.Page_Next1);                 DisplayImage(this.pboxEnd, global::KK.Pagers.Properties.Resources.Page_End1);                 return;             }             //首页且不止一页数据             if (PageIndex.Equals(1) && !PageIndex.Equals(PageCount))             {                 DisplayImage(this.pboxFirst, global::KK.Pagers.Properties.Resources.Page_First1);                 DisplayImage(this.pboxUp, global::KK.Pagers.Properties.Resources.Page_Last1);                 DisplayImage(this.pboxNext, global::KK.Pagers.Properties.Resources.Page_Next);                 DisplayImage(this.pboxEnd, global::KK.Pagers.Properties.Resources.Page_End);                 return;             }             //只有一页数据             if (PageIndex.Equals(1) && PageIndex.Equals(PageCount))             {                 DisplayImage(this.pboxFirst, global::KK.Pagers.Properties.Resources.Page_First1);                 DisplayImage(this.pboxUp, global::KK.Pagers.Properties.Resources.Page_Last1);                 DisplayImage(this.pboxNext, global::KK.Pagers.Properties.Resources.Page_Next1);                 DisplayImage(this.pboxEnd, global::KK.Pagers.Properties.Resources.Page_End1);                 return;             }             //尾页             if (PageIndex == PageCount)             {                 DisplayImage(this.pboxFirst, global::KK.Pagers.Properties.Resources.Page_First);                 DisplayImage(this.pboxUp, global::KK.Pagers.Properties.Resources.Page_Last);                 DisplayImage(this.pboxNext, global::KK.Pagers.Properties.Resources.Page_Next1);                 DisplayImage(this.pboxEnd, global::KK.Pagers.Properties.Resources.Page_End1);                 return;             }             //大于第一页             if (PageIndex > 1 && PageIndex < PageCount)             {                 DisplayImage(this.pboxFirst, global::KK.Pagers.Properties.Resources.Page_First);                 DisplayImage(this.pboxUp, global::KK.Pagers.Properties.Resources.Page_Last);                 DisplayImage(this.pboxNext, global::KK.Pagers.Properties.Resources.Page_Next);                 DisplayImage(this.pboxEnd, global::KK.Pagers.Properties.Resources.Page_End);                 return;             }         }           #endregion           #region private method         /// <summary>         /// 设置控件是否显示         /// </summary>         /// <param name="pb">PictureBox pb</param>         /// <param name="img">图片</param>         private void DisplayImage(PictureBox pb, Image img)         {             if (img != null) pb.Image = img;         }           /// <summary>         /// 获取页数         /// </summary>         /// <returns>页数</returns>         private int GetPageCount()         {             if (PageSize == 0)             {                 return 0;             }             int pageCount = TotalCount / PageSize;             if (TotalCount % PageSize == 0)             {                 pageCount = TotalCount / PageSize;             }             else             {                 pageCount = TotalCount / PageSize + 1;             }               return pageCount;         }           /// <summary>         /// 显示页数         /// </summary>         /// <param name="count">页数</param>         public void DrawControl(int count)         {             TotalCount = count;             this.lblPageCountShow.Text = string.Format("共{0}页", PageCount);             DrawControl(false);         }           /// <summary>         /// 分页控件可用性设置         /// </summary>         /// <param name="callEvent">callEvent</param>         private void DrawControl(bool callEvent)         {             this.ctboxCurrentPageIndex.Text = PageIndex.ToString();             this.ctboxCurrentPageIndex.SelectionStart = ctboxCurrentPageIndex.TextLength;             if (callEvent && OnPageChanged != null)                 OnPageChanged(this, null);             SetFormCtrEnabled();             if (PageCount == 0)             {                 this.ctboxCurrentPageIndex.Text = "1";                 this.ctboxCurrentPageIndex.SelectionStart = ctboxCurrentPageIndex.TextLength;                 this.pboxFirst.Enabled = false;                 this.pboxUp.Enabled = false;                 this.pboxNext.Enabled = false;                 this.pboxEnd.Enabled = false;             }             if (PageCount == 1)             {                 this.ctboxCurrentPageIndex.Text = "1";                 this.ctboxCurrentPageIndex.SelectionStart = ctboxCurrentPageIndex.TextLength;                 this.pboxFirst.Enabled = false;                 this.pboxUp.Enabled = false;                 this.pboxNext.Enabled = false;                 this.pboxEnd.Enabled = false;             }             else if (PageIndex == 1)             {                 this.ctboxCurrentPageIndex.Text = "1";                 this.ctboxCurrentPageIndex.SelectionStart = ctboxCurrentPageIndex.TextLength;                 this.pboxFirst.Enabled = false;                 this.pboxUp.Enabled = false;             }             else if (PageIndex == PageCount)             {                 this.ctboxCurrentPageIndex.Text = PageCount.ToString();                 this.ctboxCurrentPageIndex.SelectionStart = ctboxCurrentPageIndex.TextLength;                 this.pboxNext.Enabled = false;                 this.pboxEnd.Enabled = false;             }         }           private void SetFormCtrEnabled()         {             this.pboxFirst.Enabled = true;             this.pboxNext.Enabled = true;             this.pboxUp.Enabled = true;             this.pboxEnd.Enabled = true;         }           #endregion           private void Pbox_EnabledChanged(object sender, EventArgs e)         {             PictureBox pbox = sender as PictureBox;             bool isEnable = pbox.Enabled;             Image pageimage;             switch (pbox.Name)             {                 case "pboxFirst":                     pageimage = isEnable ? global::KK.Pagers.Properties.Resources.Page_First : global::KK.Pagers.Properties.Resources.Page_First1;                     break;                 case "pboxNext":                     pageimage = isEnable ? global::KK.Pagers.Properties.Resources.Page_Next : global::KK.Pagers.Properties.Resources.Page_Next1;                     break;                 case "pboxUp":                     pageimage = isEnable ? global::KK.Pagers.Properties.Resources.Page_Last : global::KK.Pagers.Properties.Resources.Page_Last1;                     break;                 default:                     pageimage = isEnable ? global::KK.Pagers.Properties.Resources.Page_End : global::KK.Pagers.Properties.Resources.Page_End1;                     break;             }             DisplayImage(pbox, pageimage);         }           private void Pagers_Load_1(object sender, EventArgs e)         {             if (GetPageCount() > 0) ctboxCurrentPageIndex.Text = "1";             else ctboxCurrentPageIndex.Text = "0";         }       } }

调用方式：

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using System; using System.Collections.Generic; using System.Linq; using System.Windows.Forms;   namespace Demo {     public partial class Form2 : Form     {         List<StudentInfo> list = new List<StudentInfo>();           public Form2()         {             InitializeComponent();             this.dgvList.AutoGenerateColumns = false;               this.pagingList.PageIndex = 1;             for (int i = 1; i <= 33; i++)             {                 StudentInfo stu = new StudentInfo();                 stu.Name = "学生" + i;                 stu.Age = i;                 list.Add(stu);             }         }           private void Form2_Load(object sender, EventArgs e)         {             GetPageData();         }           private void GetPageData()         {             List<StudentInfo> dataSource = list                 .Skip((this.pagingList.PageIndex - 1) * this.pagingList.PageSize)                 .Take(this.pagingList.PageSize).ToList();             var count = Math.Ceiling(double.Parse(Convert.ToString(list.Count / dataSource.Count)));               this.dgvList.DataSource = dataSource;             this.pagingList.TotalCount = list.Count;             //调用page的公用方法             this.pagingList.DrawControl(list.Count);         }           private void pagingList_OnPageChanged(object sender, EventArgs e)         {             GetPageData();         }     }       public class StudentInfo     {         public string Name { get; set; }         public int Age { get; set; }     } }