你好Jayashri，

Hello Jayashri,

请参考以下链接.

https://msdn.microsoft.com/zh-CN/library/ee231557.aspx

https://msdn.microsoft.com/en-IN/library/ee231557.aspx

http://www.c-sharpcorner.com/article/steps-to-custom-application-pages-in-sharepoint-2013-using-visual-studio/

http://www.c-sharpcorner.com/article/steps-to-custom-application-pages-in-sharepoint-2013-using-visual-studio/

http://www.sharepoint-journey.com/application-page-in-sharepoint-2013.html

http://www.sharepoint-journey.com/application-page-in-sharepoint-2013.html

要与数据库通信，可以在配置文件或SharePoint列表(例如配置列表)中使用连接字符串

To communicate with database, you can use connection string either in config file or in a SharePoint list say Configuration List for example

谢谢