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public class PagingHelper {       public static DataTable _dt;       //每页显示多少条     public static int pageNum = 20;     //当前是第几页     public static int pIndex = 1;     //对象     //private DataGrid grdList;     //最大页数     public static int MaxIndex = 1;     //一共多少条     private int allNum = 0;     #region 初始化数据       /// <summary>     /// 初始化数据     /// </summary>     /// <param name="grd"></param>     /// <param name="dtt"></param>     /// <param name="Num"></param>     public void ShowPages(DataTable ds, DataGrid dtList,int Num, TextBox txtCurtPage, Button btnGo)     {         if (ds == null || ds.Rows.Count == 0)             return;         if (ds.Rows.Count == 0)             return;         DataTable dt = ds;         _dt = dt.Clone();         //this.grdList = grd;         pageNum = Num == 0 ? 20 : Num;         pIndex = 1;         foreach (DataRow r in dt.Rows)             _dt.ImportRow(r);                SetMaxIndex();         ReadDataTable((DataGrid)dtList);//繪製 DataGrid         if (MaxIndex > 1)         {             //激活按鈕             abledBtn((TextBox)txtCurtPage, (Button)btnGo);             //this.pageGo.IsReadOnly = false;             //this.btnGo.IsEnabled = true;         }     }       public void abledBtn(TextBox txtCurtPage, Button btnGo)     {         txtCurtPage.IsReadOnly = false;         btnGo.IsEnabled = true;     }       #endregion       #region 画数据  OK       /// <summary>     /// 画数据     /// </summary>     public void ReadDataTable(DataGrid grdList)     {         //pIndex = pIndex;         try         {             DataTable tmpTable = new DataTable();             tmpTable = _dt.Clone();             int first = pageNum * (pIndex - 1);             first = (first > 0) ? first : 0;             //如果总数量大于每页显示数量             if (_dt.Rows.Count >= pageNum * pIndex)             {                 for (int i = first; i < pageNum * pIndex; i++)                     tmpTable.ImportRow(_dt.Rows[i]);             }             else             {                 for (int i = first; i < _dt.Rows.Count; i++)                     tmpTable.ImportRow(_dt.Rows[i]);             }             grdList.ItemsSource = null;             grdList.ItemsSource = tmpTable.DefaultView;             tmpTable.Dispose();         }         catch         {             //return "出錯";             //MessageBox.Show("错误");         }         finally         {             //DisplayPagingInfo();         }     }       #endregion       #region 画每页显示等数据  已置于前台     //Old  No Used       /// <summary>     /// 画每页显示等数据     /// </summary>     public void DisplayPagingInfo(Button btnPrev, Button btnNext, Button btnFirst, Button btnLast)     {         if (pIndex == 1)         {             btnPrev.IsEnabled = false;             btnFirst.IsEnabled = false;         }         else         {             btnPrev.IsEnabled = true;             btnFirst.IsEnabled = true;         }         if (pIndex == MaxIndex)         {             btnNext.IsEnabled = false;             btnLast.IsEnabled = false;         }         else         {             btnNext.IsEnabled = true;             btnLast.IsEnabled = true;         }         //tbkRecords.Text = string.Format("每页{0}条/共{1}条", pageNum, this.allNum);         int first = (pIndex - 4) > 0 ? (pIndex - 4) : 1;         int last = (first + 9) > MaxIndex ? MaxIndex : (first + 9);         //this.grid.Children.Clear();         //獲取列         //for (int i = first; i <= last; i++)         //{         //    ColumnDefinition cdf = new ColumnDefinition();         //    this.grid.ColumnDefinitions.Add(cdf);         //    TextBlock tbl = new TextBlock();         //    tbl.Text = i.ToString();         //    tbl.Style = FindResource("PageTextBlock3") as Style;         //    tbl.MouseLeftButtonUp += new MouseButtonEventHandler(tbl_MouseLeftButtonUp);         //    tbl.MouseLeftButtonDown += new MouseButtonEventHandler(tbl_MouseLeftButtonDown);         //    if (i == pIndex)         //        tbl.IsEnabled = false;         //    Grid.SetColumn(tbl, this.grid.ColumnDefinitions.Count - 1);         //    Grid.SetRow(tbl, 0);         //    this.grid.Children.Add(tbl);         //}     }       #endregion       #region 首页       /// <summary>     /// 首页     /// </summary>     /// <param name="sender"></param>     /// <param name="e"></param>     public void btnFirst_Method(DataGrid grdList)     {         pIndex = 1;           ReadDataTable(grdList);     }       /// <summary>     /// 首页     /// </summary>     /// <param name="sender"></param>     /// <param name="e"></param>     //private void btnFirst_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)     //{     //    e.Handled = true;     //}       #endregion       #region 上一页     /// <summary>     /// 上一页     /// </summary>     /// <param name="sender"></param>     /// <param name="e"></param>     public void btnPrev_Method(DataGrid grdList)     {         if (pIndex <= 1)             return;         pIndex--;         ReadDataTable(grdList);     }       /// <summary>     /// 上一页     /// </summary>     /// <param name="sender"></param>     /// <param name="e"></param>     //private void btnPrev_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)     //{     //    e.Handled = true;     //}       #endregion       #region 下一页       /// <summary>     /// 下一页     /// </summary>     /// <param name="sender"></param>     /// <param name="e"></param>     public void btnNext_Method(DataGrid grdList)     {         if (pIndex >= MaxIndex)             return;         pIndex++;         ReadDataTable(grdList);     }       /// <summary>     /// 下一页     /// </summary>     /// <param name="sender"></param>     /// <param name="e"></param>     //private void btnNext_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)     //{     //    e.Handled = true;     //}       #endregion       #region 未页       /// <summary>     /// 未页     /// </summary>     /// <param name="sender"></param>     /// <param name="e"></param>     public void btnLast_Method(DataGrid grdList)     {         pIndex = MaxIndex;         ReadDataTable(grdList);     }       /// <summary>     /// 未页     /// </summary>     /// <param name="sender"></param>     /// <param name="e"></param>     //private void btnLast_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)     //{     //    e.Handled = true;     //}       #endregion       #region 设置最多大页面       /// <summary>     /// 设置最多大页面     /// </summary>     public void SetMaxIndex()     {         //多少页         int Pages = _dt.Rows.Count / pageNum;         if (_dt.Rows.Count != (Pages * pageNum))         {             if (_dt.Rows.Count < (Pages * pageNum))                 Pages--;             else                 Pages++;         }         MaxIndex = Pages;         this.allNum = _dt.Rows.Count;     }       #endregion       #region 跳转到多少页       /// <summary>     /// 跳转到多少页     /// </summary>     /// <param name="sender"></param>     /// <param name="e"></param>     public void btnGo_Method(TextBox txtCurtPage, DataGrid grdList)     {         if (IsNumber(txtCurtPage.Text))         {             int pageNum = int.Parse(txtCurtPage.Text);             if (pageNum > 0 && pageNum <= MaxIndex)             {                 pIndex = pageNum;                 ReadDataTable(grdList);             }             else if (pageNum > MaxIndex)             {                 pIndex = MaxIndex;                 ReadDataTable(grdList);             }         }         else         {             txtCurtPage.SelectAll();             txtCurtPage.Focus();         }     }     #endregion       public Regex RegNumber = new Regex("^[0-9]+$");       #region 判断是否是数字     /// <summary>     /// 判断是否是数字     /// </summary>     /// <param name="valString"></param>     /// <returns></returns>     public bool IsNumber(string valString)     {         Match m = RegNumber.Match(valString);         return m.Success;     }     #endregion }

　　

此分頁，實際是將獲取到的DataTable保存在內存中，然後根據頁碼獲取數據，

 附DataRow[] 轉 DataTable 取表結構方法

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/// <summary> /// DataRow[] 轉 DataTable 取表結構 /// </summary> /// <param name="cloneDt"></param> /// <param name="inDt"></param> /// <returns></returns> public DataTable TransferDto(DataTable cloneDt, DataRow[] inDtRow) {     try     {         DataTable outDt = new DataTable("dt1");         outDt = cloneDt.Clone();         foreach (DataRow row in inDtRow)         {             outDt.ImportRow(row);         }         return outDt;         #region Others 1         /*         DataTable dt=new DataTable();         for (int i= 0; i< dg.Columns.Count; i++)         {             DataColumn dc = new DataColumn(dg.Columns[i].Name.ToString());             dt.Columns.Add(dc);         }         for (int i = 0; i< dg.Rows.Count; i++)         {             DataRow dr = dt.NewRow();             for (int j = 0; j < dg.Columns.Count; j++)             {                 dr[j] = dg.Rows[i].Cells[j].Value.ToString();             }             dt.Rows.Add(dr);         }         return dt;          */         #endregion     }     catch (Exception lo_Ex)     {         throw new Exception("TransferDto is Fail,ErrMsg:=" + lo_Ex.Message.Substring(0, 200));     } }