using System; using System.Collections.Generic; using System.ComponentModel; using System.Drawing; using System.Data; using System.Linq; using System.Text; using System.Windows.Forms; using System.Data.Common; using System.Collections; namespace Common {     public partial class WinFormPager : UserControl     {         public event EventHandler PageChanged; //事件：控件的当前页码发生变更。          private int pageSize;         private int curPage;         private int pageCount;         public WinFormPager()         {             InitializeComponent();          }         private void WinFormPager_Load(object sender, EventArgs e)         {         }         /// <summary>          /// [属性]每页显示记录数。          /// </summary>         public int PageSize         {             get             {                 if (pageSize <= 0)                 {                     pageSize = 10;                 }                 return pageSize;             }             set             {                 pageSize = value;             }         }         /// <summary>          /// 当前页数          /// </summary>          public int CurPage         {             get             {                 if (curPage <= 0)                 {                     curPage = 1;                 }                 return curPage;             }             set             {                 curPage = value;                 if (PageChanged != null)                 {                     SafeRaise.Raise(PageChanged,null);//触发当件页码变更事件。                  }             }         }         /// <summary>          /// [属性]总页数。          /// </summary>          public int PageCount         {             get             {                 if (RecordCount > 0)                 {                     int pageCount = RecordCount / PageSize;                     if (RecordCount % PageSize == 0)                     {                       pageCount = RecordCount / PageSize;                     }                     else                     {                         pageCount = RecordCount / PageSize + 1;                     }                     return pageCount;                 }                 else                 {                     return 0;                 }             }             set             {                 pageCount = value;             }         }         /// <summary>          /// [属性]总记录数。          /// </summary>          public int RecordCount         {             get;             set;         }         /// <summary>          /// [属性]相对于当前页的上一页          /// </summary>          public int PrevPage         {             get             {                 if (CurPage > 1)                 {                     return CurPage - 1;                 }                 return 1;             }         }         /// <summary>          /// [属性]相对于当前页的下一页          /// </summary>          public int NextPage         {             get             {                 if (CurPage < PageCount)                 {                     return CurPage + 1;                 }                 return PageCount;             }         }         private void btnFirstPage_Click(object sender, EventArgs e)         {             this.CurPage = 1;         }         private void btnLastPage_Click(object sender, EventArgs e)         {             this.CurPage = this.PrevPage;         }         private void btnNextPage_Click(object sender, EventArgs e)         {             this.CurPage = this.NextPage;         }         private void btnEndPage_Click(object sender, EventArgs e)         {             this.CurPage = this.PageCount;         }         private void txtPageNumber_TextChanged(object sender, EventArgs e)         {             if (!Validator.IsNumeric(this.txtPageNumber.Text.Trim()))             {                 MessageBox.Show("请输入数字！");             }         }         private void btnJump_Click(object sender, EventArgs e)         {             if (!Validator.IsNumeric(this.txtPageNumber.Text.Trim()))//验证输入是否为数字             {                 MessageBox.Show("请输入数字！");             }             else             {                 if (int.Parse(this.txtPageNumber.Text.Trim()) > 0)                 {                     if (int.Parse(this.txtPageNumber.Text.Trim()) < this.PageCount)                     {                         this.CurPage = int.Parse(this.txtPageNumber.Text.Trim());                     }                     else                     {                         this.CurPage = this.PageCount;                     }                 }                 else                 {                     this.CurPage = 1;                 }             }         }      } }

private void BindData() {     int rowCount = 0;     pager.PageSize = 15;    DataGridView.DataSource = GetList(pager.CurPage, pager.PageSize, out rowCount);     pager.RecordCount = rowCount;     pager.lbNumber.Text = string.Format("共{0}条记录，每页{1}条记录，共{2}页", pager.RecordCount.ToString(), pager.PageSize.ToString(), pager.PageCount.ToString()); } private void Pager_PageChanged(object sender, EventArgs e) {     BindData(); //重新对DataGridView控件的数据源进行绑定。 }