Question

怎么获取MVC Web.config 内的连接字符串

Answer 1

ASP.NET MVC 4中读取web.config中的配置方法如下：
web.config内容：

<?xml version="1.0" encoding="utf-8" ?>
<configuration>

<system.web>
<compilation defaultLanguage="c#" debug="true" />
</system.web>
<appSettings>
<add key="ConnectionInfo" value="server=(local);database=Northwind;Integrated Security=SSPI" />
</appSettings>
</configuration>
读取配置的方法：

void Page_Load(object sender, EventArgs e)
{
string connectionInfo = ConfigurationSettings.AppSettings["ConnectionInfo"];
using(SqlConnection connection = new SqlConnection(connectionInfo))
{
connection.Open();
// perform work with connection
}
}

Answer 2

public static class ConfigHelper
{
public static readonly string ConnStrScO2O = ConfigurationManager.ConnectionStrings["ScO2O"].ConnectionString;
}
要引用dll还有添加命名空间
view中的webconfig是
通常添加一些公共的命名空间，这样就不用每个view都独自using了