.net 读取非标准配置文件的小例子

代码如下：

public static string config(string key) 
       { 
           execonfigurationfilemap file = new execonfigurationfilemap(); 
           file.execonfigfilename = @"providers\\provider.config"; 
           configuration config = configurationmanager.openmappedexeconfiguration(file, configurationuserlevel.none); 
           appsettingssection appsection = (appsettingssection)config.getsection("appsettings"); 
           return appsection.settings[key].value; 
       } 

配置文件目录结构：

<?xml version="1.0" encoding="utf-8" ?> 
<configuration> 
    <appsettings> 
        <add key="connectionstring" value="server=(local);database=db;user id=sa;password=123" /> 
    </appsettings> 
</configuration> 

调用：

//里面的参数为配置文件的key  
string strconn=config("connectionstring");