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I do not know what is app_data in .net web application?how do we find it? is it default or we create it. When I opened a new project I am not able to see it

Jon P
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divya
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  • What is the version of Visual studio you are using? – JGV May 18 '15 at 19:18
  • Nothing to do with Classic ASP and a Google search would have took less than half the time to answer your question - https://www.google.co.uk/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=what%20is%20app_data – pee2pee May 18 '15 at 19:19
  • I was able to create app_data folder in the project but it is not visible after I closed the application and opened again. How do i view APP_DATA? – divya May 18 '15 at 20:05

4 Answers4

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The App_Data folder is used by ASP.Net applications. It is primarily used to store a local database or other data files such as XML files. For more information see here.

Donal
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  • Thanks!I was able to create app_data folder in the project but it is not visible after I closed the application and opened again. How do i view APP_DATA? – divya May 18 '15 at 20:10
  • @divya You have to click Show All ltems in Solution Explorer ToolBar to see all hidden folders and files. See here: http://stackoverflow.com/a/18040675/379855 – Donal May 20 '15 at 00:39
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What is the App_Data folder used for in Visual Studio?

To make it easier to work with your application, ASP.NET reserves certain file and folder names that you can use for specific types of content. App_Data contains application data files including .mdf database files, XML files, and other data store files.

Community
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pee2pee
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  • Thanks!I was able to create app_data folder in the project but it is not visible after I closed the application and opened again. How do i view APP_DATA? – divya May 18 '15 at 20:06
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I run into the same problem finding no app_data after create a web project. My solution is to use the web-form template instead of empty template and then the VS will create the folder for you.

user2984297
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You have to create the new project as ASP.NET Web Application(.Net Framework) not ASP.Net Core Web Application. then Visual studio will automatically create the App_Data folder for you.

See the project templates

screenshot

Matt Ke
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Pavan Somarathne
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  • This cannot be the answer because core was release on 27 June 2016, which was after the question was asked! (see https://en.wikipedia.org/wiki/.NET_Core) – Greg Jul 20 '20 at 21:25
  • I agree with you in this context. But nowadays people are getting this error because of this protect template change. – Pavan Somarathne Jul 21 '20 at 14:32