private void button1_Click(object sender, System.EventArgs e)
		{
			// 打开数据库连接
			if( conn.State != ConnectionState.Open)
				conn.Open();  
			string sql = "CREATE DATABASE mydb ON PRIMARY"
				+"(name=test_data, filename = 
'C:\\mysql\\mydb_data.mdf', size=3,"
				+"maxsize=5, filegrowth=10%)log on"
				+"(name=mydbb_log, 
filename='C:\\mysql\\mydb_log.ldf',size=3,"
				+"maxsize=20,filegrowth=1)"; 
			cmd = new SqlCommand(sql, conn);
			try
			{
				cmd.ExecuteNonQuery();
			}
			catch(SqlException ae)
			{
				MessageBox.Show(ae.Message.ToString());
			}
		}