C#在Datatable中添加动态列和行

Question

我尝试在循环中垂直向 DataTable 列添加值。

但输出看起来不像预期的那样好。

DataTables dynamictable = new DataTable()
foreach (DataColumn cl in dataTable.Columns)
{
   dynamictable.Columns.Add(cl.ToString());
   List<string> plainList = dataTable.AsEnumerable().Select(x => x[cl].ToString()).ToList();

   for (int i=0; i< plainList.Count(); i++)
   {
       DataRow row = dynamictable.NewRow();
       row[cl.ToString()] = plainList[i];   
       enryptedTable.Rows.Add(row);
   }
}

实际输出来自我的代码：

预期输出：

Answer 1

将您的代码更改为：

DataTable dynamictable = new DataTable();
int col = 0;
foreach (DataColumn cl in dataTable.Columns)
{
    dynamictable.Columns.Add(cl.ToString());
    List<string> plainList = dataTable.AsEnumerable().Select(x => x[cl].ToString()).ToList();
    DataRow row = null;
    for (int i = 0; i < plainList.Count(); i++)
    {
       row = dynamictable.NewRow();
       row[col] = plainList[i];
       dynamictable.Rows.Add(row);
    }
    col++;
}
//now set dynamictable to datagridview or .....