Home Database Mysql Tutorial ADO.NET连接Access数据库实例

ADO.NET连接Access数据库实例

Jun 07, 2016 pm 03:49 PM
ac access Example database connect

连接Access程序代码片段: using System.Data; using System.Data.OleDb; string strConnection="Provider=Microsoft.Jet.OleDb.4.0;"; strConnection+=@"Data Source=C:/BegASPNET/Northwind.mdb"; OleDbConnection objConnection=new OleDbConnection(strC

连接Access程序代码片段:

using System.Data;
using System.Data.OleDb;

string strConnection="Provider=Microsoft.Jet.OleDb.4.0;";
strConnection+=@"Data Source=C:/BegASPNET/Northwind.mdb";

OleDbConnection objConnection=new OleDbConnection(strConnection);

objConnection.Open();
objConnection.Close();

解释:

连接Access数据库需要导入额外的命名空间,所以有了最前面的两条using命令,这是必不可少的!

strConnection这个变量里存放的是连接数据库所需要的连接字符串,它指定了要使用的数据提供者和要使用的数据源。

"Provider=Microsoft.Jet.OleDb.4.0;"是指数据提供者,这里使用的是Microsoft Jet引擎,也就是Access中的数据引擎,asp.net就是靠这个和Access的数据库连接的。

"Data Source=C:/BegASPNET/Northwind.mdb"是指明数据源的位置,它的标准形式是"Data Source=MyDrive:MyPath/MyFile.MDB"。

说明:

1."+="后面的"@"符号是防止将后面字符串中的"/"解析为转义字符。

2.如果要连接的数据库文件和当前文件在同一个目录下,还可以使用如下的方法连接:

  strConnection+="Data Source=";
  strConnection+=MapPath("Northwind.mdb");
  这样就可以省得你写一大堆东西了!

3.要注意连接字符串中的参数之间要用分号来分隔。

 "OleDbConnection objConnection=new OleDbConnection(strConnection);"这一句是利用定义好的连接字符串来建立了一个链接对象,以后对数据库的操作我们都要和这个对象打交道。

 "objConnection.Open();"这用来打开连接,至此,与Access数据库的连接完成。我们可以进行其余操作(插入,删除...)

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