如何在app.config文件中配置访问数据库文件？

Question

我将Access 2010与c＃项目一起使用，我使用OleDbConnection db_con = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:\\projecty bashi nawxoyy\\Bashi Nawxoyy\\Bashi Nawxoyy\\db_file.accdb");链接到所有形式的数据库文件OleDbConnection db_con = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:\\projecty bashi nawxoyy\\Bashi Nawxoyy\\Bashi Nawxoyy\\db_file.accdb"); 知道我想在我的app.config文件中配置OleDbConnection以在所有机器上工作而无需更改db文件链接吗？

Answer 1

您可以像这样将其添加到app.config中

<connectionStrings>
  <add connectionString="Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:\projecty bashi nawxoyy\Bashi Nawxoyy\Bashi Nawxoyy\db_file.accdb" name="connectionString"/>
</connectionStrings>

像这样使用

string conString = System.Configuration.ConfigurationManager.ConnectionStrings["connectionString"].ToString();
db_con = new OleDbConnection(conString);

Answer 2

指定的连接字符串正确。

在app.config ：

<add connectionString="Provider=Microsoft.ACE.OLEDB.12.0;
     Data Source=complete path of accdb" name="Connectionstring"/>

您将在C＃中将其称为：

OleDbConnection dbConnection = new OleDbConnection();

dbConnection.ConnectionString =
    ConfigurationManager.ConnectionStrings["Connectionstring"].ConnectionString;

希望这可以帮助。

Answer 3

//可以用作连接字符串

<connectionStrings>
                       <add connectionString="Data Source=Test;D:\projecty bashi nawxoyy\Bashi Nawxoyy\Bashi Nawxoyy\db_file.accdb Catalog=Demo; User ID=sa; Password=Password" name="DemoConnection" providerName="Microsoft.ACE.OLEDB.12.0" />

// And You can use this in constructor of the class file as bellow
 string connStringKey = "DemoConnection";
          connectionString = ConfigurationManager.ConnectionStrings[connStringKey].ToString();