如何在csv文件中存儲排序的記錄？

Question

我的數據表datewise的記錄與列TradingDate這是datetime.

TableWithOnlyFixedColumns.DefaultView.Sort = "TradingDate asc";

現在我想將這些整理記錄存儲到csv文件，但是存儲的記錄不按日期排序類型進行排序。

TableWithOnlyFixedColumns.DefaultView.Sort = "TradingDate asc"; 
    DataTable newTable = TableWithOnlyFixedColumns.Clone(); 
    newTable.DefaultView.Sort = TableWithOnlyFixedColumns.DefaultView.Sort; 
    foreach (DataRow oldRow in TableWithOnlyFixedColumns.Rows) 
    { 
    newTable.ImportRow(oldRow); 
    } 
    // we'll use these to check for rows with nulls 
    var columns = newTable.DefaultView.Table.Columns.Cast<DataColumn>(); 
    using (var writer = new StreamWriter(@"C:\Documents and Settings\Administrator\Desktop\New.csv")) 
    { 
    for (int i = 0; i < newTable.DefaultView.Table.Rows.Count; i++) 
    { 
     DataRow row = newTable.DefaultView.Table.Rows[i]; 
     // check for any null cells 
     if (columns.Any(column => row.IsNull(column))) 
     continue; 
     string[] textCells = row.ItemArray 
     .Select(cell => cell.ToString()) // may need to pick a text qualifier here 
     .ToArray(); 
     // check for non-null but EMPTY cells 
     if (textCells.Any(text => string.IsNullOrEmpty(text))) 
     continue; 
     writer.WriteLine(string.Join(",", textCells)); 
    } 
} 

那麼如何在csv文件中存儲排序的記錄？

Answer 1

這行代碼;

DataRow row = newTable.DefaultView.Table.Rows[i]; 

正在引用DataView背後未排序的DataTable。您需要使用DataRowView而不是DataRow並從DataView訪問已排序的行;

DataRowView row = newTable.DefaultView[i];