DataTable.Clone 方法：克隆 DataTable 的結構，包括所有 DataTable 架構和約束。

DataTable.Copy 方法：復制該 DataTable 的結構和數據。

我們可以編寫如下的程序，進行驗證：

復制代碼 代碼如下:

        static string connStr = "Server=.//sqlexpress;Initial Catalog=hr;Integrated Security=True";

        static void Clone()
        {
            using (SqlConnection conn = new SqlConnection(connStr))
            {
                string sql = "select * from emp";
                SqlDataAdapter da = new SqlDataAdapter(sql, conn);
                DataTable dt = new DataTable();
                da.Fill(dt);
                DataTable dtClone = dt.Clone();
                Print(dtClone);
            }
        }

        private static void Print(DataTable dtClone)
        {
            foreach (DataColumn col in dtClone.Columns)
            {
                Console.Write(col.DataType+"/t");
            }
            Console.WriteLine();
            foreach (DataRow row in dtClone.Rows)
            {
                Console.Write(row[0] + "/t" + row[1] + "/t" + row[2] + "/n");
            }
            Console.WriteLine();
        }
        static void Main(string[] args)
        {
            Clone();//僅僅復制表結構
            Copy();//復制表結構及數據
            Console.ReadKey();
        }

        private static void Copy()
        {
            using (SqlConnection conn = new SqlConnection(connStr))
            {
                string sql = "select * from emp";
                SqlDataAdapter da = new SqlDataAdapter(sql, conn);
                DataTable dt = new DataTable();
                da.Fill(dt);
                DataTable dtCopy = dt.Copy();
                Print(dtCopy);
            }
        }
    }