我想为一个练习做一个简单的应用程序,所以连接到像Access这样的简单数据库(.accdb)会很不错
我的程序看起来像这样:
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.OleDb;
using System.Linq;
using System.Web;
namespace myProject.Account
{
public class DbManager
{
private OleDbConnection _dbConnection;
public void OpenDbConnection()
{
_dbConnection = new OleDbConnection {ConnectionString = GetConnectionString()};
}
private string GetConnectionString()
{
return "Provider=Microsoft.ACE.OLEDB.14.0;Data Source=exercise1.accdb";
}
public void CloseDbConnection()
{
_dbConnection.Close();
}
public void GetUser()
{
DataSet myDataSet = new DataSet();
var myAdapptor = new OleDbDataAdapter();
OleDbCommand command = new OleDbCommand("SELECT * FROM tblUser", _dbConnection);
myAdapptor.SelectCommand = command;
myAdapptor.Fill(myDataSet, "tblUser");
}
} …在PHP中有时候我会看到:
$html = <<<HTML
<p>Hello world</p>
HTML;
通常我会使用ob_start():
ob_start();
?>
<p>Hello world</p>
<?php
$html = ob_get_contents();
ob_clean();
你能告诉我这两种写入缓冲区的方式和它们的优点有什么区别吗？