Question

如何将DataSet（多个数据表）导出到记事本。来自c＃

注意：不是单个DataTable，来自DataSet的多个DataTable;

Answer 1

我会建议一些简单的事情，创建一个翻译或下载网上提供的一堆其他库。

你最想去

public interfacte IExport
{
   bool Export(Databale sometable);// this can also reference interface
   //concrete implementation could also handle saving of file
}

然后调用具体类来实现该值，使用Factory Patter，Dependency Injection等来提供具体类型。然后，您可以继续添加尽可能多的转换器，以支持您喜欢的文件类型。

Answer 2

private  void Write(System.Data.DataSet dts, string outputFilePath)
{
   System.Data.DataTable dt = new System.Data.DataTable();
   for (int z = 0; z < dts.Tables.Count; z++)
   {
     dt = dts.Tables[z];
     int[] maxLengths = new int[dt.Columns.Count];    
     for (int i = 0; i < dt.Columns.Count; i++)
     {
       maxLengths[i] = dt.Columns[i].ColumnName.Length;    
       foreach (DataRow row in dt.Rows)
       {
         if (!row.IsNull(i))
         {
           int length = row[i].ToString().Length;    
            if (length > maxLengths[i])
            {
              maxLengths[i] = length;
            }
          }
       }
     }

   using (StreamWriter sw = new StreamWriter(outputFilePath, true))
    {     
    for (int i = 0; i < dt.Columns.Count; i++)
     {
                            sw.Write(dt.Columns[i].ColumnName.PadRight(maxLengths[i] + 2));
     }    
     sw.WriteLine();    
      foreach (DataRow row in dt.Rows)
      {
        for (int i = 0; i < dt.Columns.Count; i++)
        {
          if (!row.IsNull(i))
          {
                                    sw.Write(row[i].ToString().PadRight(maxLengths[i] + 2));
          }
          else
          {
           sw.Write(new string(' ', maxLengths[i] + 2));
          }
        }    
      sw.WriteLine();
    }  
    sw.Close();
  }
 }
}

如何将DataSet导出到记事本？

2 个答案: