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：

WebConfigurationManager

ConfigurationManager

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