string sourceConStr = "Data Source=192.168.1.100;Initial Catalog=A; uid=sa;pwd=sa";        string destConStr = "Data Source=.;Initial Catalog=B; uid=sa;pwd=sa";        DataTable dt = new DataTable();        public Form1()        {            InitializeComponent();        }        PRivate void button3_Click(object sender, EventArgs e)        {            dt = GetTable();            MessageBox.Show("get finish");        }        private void button1_Click(object sender, EventArgs e)        {            string str = "queue start...!  /n";            Stopwatch sw = new Stopwatch();            sw.Start();            CopyData(dt);            sw.Stop();            str += "queue cost time is " + sw.ElapsedMilliseconds + "/n";            richTextBox1.Text = str;        }        private void button2_Click(object sender, EventArgs e)        {            string str = "bulk start...!  /n";            Stopwatch sw = new Stopwatch();            sw.Start();            CopyDataBulk(dt);            sw.Stop();            str += "bulk cost time is " + sw.ElapsedMilliseconds + "/n";            richTextBox2.Text = str;        }        //從數據源獲取要插入的數據        private DataTable GetTable()        {            DataTable dt = new DataTable();            using (SqlConnection sourceConnection = new SqlConnection(sourceConStr))            {                sourceConnection.Open();                SqlCommand cmd = new SqlCommand("SELECT TOP 10000 CName,PersonID,Sex,Age FROM Customer order by cid asc;", sourceConnection);                cmd.CommandTimeout = 600000;                SqlDataAdapter da = new SqlDataAdapter(cmd);                da.Fill(dt);            }            return dt;        }        //一條條插入        private void CopyData(DataTable dt)        {            using (SqlConnection destinationConnection = new SqlConnection(destConStr))            {                destinationConnection.Open();                foreach(DataRow reader in dt.Rows)                {                     string sql = "INSERT INTO Customer(Name,PersonID,Sex,Age) VALUES('" + reader["Cname"].ToString() + "','" + reader["PersonID"].ToString() + "','" + reader["Sex"].ToString() + "','" + reader["Age"].ToString() + "')";                    SqlCommand cmd = new SqlCommand(sql, destinationConnection);                    try                    {                        int re = cmd.ExecuteNonQuery();                    }                    catch (Exception ex)                    {                        MessageBox.Show(ex.Message);                    }                }            }        }        //Bulk插入        private void CopyDataBulk(DataTable dt)        {            using (SqlConnection destinationConnection = new SqlConnection(destConStr))            {                destinationConnection.Open();                using (SqlBulkCopy bulkCopy = new SqlBulkCopy(destinationConnection))                {                    //寫對應關系。如舊表的CName列的數據，對應新表Name列                     bulkCopy.ColumnMappings.Add("CName", "Name");                    //設置目標表名                    bulkCopy.DestinationTableName = "Customer";                    try                    {                        bulkCopy.WriteToServer(dt);                    }                    catch (Exception ex)                    {                        MessageBox.Show(ex.Message);                    }                    finally                    {                       // reader.Close();                    }                }            }        }