从数据表

Question

存储在CSV文件中的记录我有数据表，我在DataGridView与代码的帮扶显示这些值：

dataGridView1.ColumnCount = TableWithOnlyFixedColumns.Columns.Count; 
    dataGridView1.RowCount = TableWithOnlyFixedColumns.Rows.Count; 
    for (int i = 0; i < dataGridView1.RowCount; i++) 
    { 
     for (int j = 0; j < dataGridView1.ColumnCount; j++) 
     { 
      dataGridView1[j, i].Value = TableWithOnlyFixedColumns.Rows[i][j].ToString(); 
     } 
    } 
    TableExtractedFromFile.Clear(); 
    TableWithOnlyFixedColumns.Clear(); 

现在我想保存在CSV文件中的数据表中的记录。我怎样才能做到这一点 ？

Answer 1

你可以这样做：

// we'll use these to check for rows with nulls 
var columns = yourTable.Columns 
    .Cast<DataColumn>(); 

// say the column you want to sort by is called "Date" 
var rows = yourTable.Select("", "Date ASC"); // or "Date DESC" 

using (var writer = new StreamWriter(yourPath)) { 
    for (int i = 0; i < rows.Length; i++) { 
     DataRow row = 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)); 
    } 
}