从web.config读取连接字符串

Question

如何从web.config文件读取连接字符串到类库中包含的公共类中？我试过了：WebConfigurationManagerConfigurationManager但是这些类在我的类库中无法识别。

Answer 1

您需要添加一个引用System.Configuration，然后使用：

System.Configuration.ConfigurationManager.

    ConnectionStrings["connectionStringName"].ConnectionString;

Answer 2

C＃

// Add a using directive at the top of your code file    

using System.Configuration;

// Within the code body set your variable    

string cs = ConfigurationManager.ConnectionStrings["connectionStringName"].ConnectionString;

VB

' Add an Imports statement at the top of your code file    

Imports System.Configuration

' Within the code body set your variable    

Dim cs as String = ConfigurationManager.ConnectionStrings("connectionStringName").ConnectionString