获取AppSettings配置，获取连接字符串

1. using System.Configuration;//导入命名空间  
2.   
3. //配置文件 Web.config   
4. <appSettings>  
5. <!--数据连接字符串-->  
6. <add key="SqlConnectionStr" value="server=.;uid=sa;pwd=sa;database=RCCMS"/>  
7. <add key="FCKEditor:BasePath" value="~/fckeditor"/>  
8. <add key="FCKeditor:UserFilesPath" value="~/UploadFiles/"/>  
9. </appSettings>  
10.   
11. //在程序里获得配置文件的Key对应的值  
12. System.Configuration.ConfigurationSettings.AppSettings["SqlConnectionStr"];  
13. System.Configuration.ConfigurationManager.AppSettings["SqlConnectionStr"];  
14. System.Configuration.ConfigurationManager.ConnectionStrings["SqlConnectionStr"].ToString();

　　获取连接字符串

1. ConfigurationManager.ConnectionStrings["connectionStringsName"].ToString();