WPF 流加载

/// <summary> /// datatable分页 /// </summary> /// <param name="dt">源datatable</param> /// <param name="PageIndex">第几页</param> /// <param name="PageSize">每页记录数</param> /// <returns></returns> public DataTable GetPagedTable(DataTable dt, int PageIndex, int PageSize) { if (PageIndex == 0) return dt; DataTable newdt = dt.Copy(); newdt.Clear(); int rowbegin = (PageIndex - 1) * PageSize; int rowend = PageIndex * PageSize; if (rowbegin >= dt.Rows.Count) return newdt; if (rowend > dt.Rows.Count) rowend = dt.Rows.Count; for (int i = rowbegin; i <= rowend - 1; i++) { DataRow newdr = newdt.NewRow(); DataRow dr = dt.Rows[i]; foreach (DataColumn column in dt.Columns) { newdr[column.ColumnName] = dr[column.ColumnName]; } newdt.Rows.Add(newdr); } return newdt; }

 

private void sv_ScrollChanged(object sender, ScrollChangedEventArgs e) { try { ScrollViewer sv = e.OriginalSource as ScrollViewer; if (sv != null && e.VerticalChange != 0) { if (sv.VerticalOffset == sv.ExtentHeight - sv.ViewportHeight)//到底 { //TODO:加载下条数据 if (SteamDataTable != null) { Pgindex++; AddData(GetPagedTable(SteamDataTable, Pgindex, PageSize)); } } } } catch { } }

 

转载于:https://www.cnblogs.com/SeNaiTes/p/10239847.html

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