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.NET Forum / ASP.NET / General / March 2008VS2008: should data sets be placed in App_Data?
I'm working on a small Web project in VS2008. In VS2005 it was recommended that DataSet be placed in App_Data folder (the framework did that automatically). In VS2008 the framework does not give me that option. The Add.New Item in the App_Data context menu does not even list the DataSet. Does anyone know what is behind the change and what the recommended practice is? Thanks. Datasets are usually stored in memory, as an in-memory database. Are you writing the Dataset to a file ? If not, using App_Data doesn't make sense. Juan T. Llibre, asp.net MVP asp.net faq : http://asp.net.do/faq/ foros de asp.net, en español : http://asp.net.do/foros/ ====================================== > I'm working on a small Web project in VS2008. In VS2005 it was recommended that DataSet be placed in App_Data folder > (the framework did that automatically). In VS2008 the framework does not give me that option. The Add.New Item in > the App_Data context menu does not even list the DataSet. > > Does anyone know what is behind the change and what the recommended practice is? > Thanks. I did not mean instantiated DataSets objects at run time. I was referring to the process of creating/adding strongly typed data sets to a project in VS2008 (i.e. Solution Explorer.Add New Item). > Datasets are usually stored in memory, as an in-memory database. > [quoted text clipped - 14 lines] >> practice is? >> Thanks. Try to add them from the main menu. It should suggest to add them in App_Code... It looks like to me you are confusing DataSets with data files (such as a SQL Server MDF file) ??? -- Patrice > I'm working on a small Web project in VS2008. In VS2005 it was > recommended that DataSet be placed in App_Data folder (the framework did [quoted text clipped - 5 lines] > practice is? > Thanks. In VS2008 it does not suggest as it used to in VS2005. The only way to place DataSets (i.e. xsd) in App_Code is to drag them into the folder after creating them. It is not a big deal but I'm curious what the best practice is. Another difference is that when you Add a DataSet the TableAdapter wizard is no longer automatically launched. Does your VS2008 behave like VS2005 in the above scenarios? And I don't mean data files. > Try to add them from the main menu. It should suggest to add them in > App_Code... [quoted text clipped - 14 lines] >> practice is? >> Thanks. re: !> DataSets (i.e. xsd) !> I was referring to the process of creating/adding strongly typed data sets to a project Datasets aren't the same as XSD schema. An XSD file is a schema class that defines what your xml will look like, not including data. http://www.csharpfriends.com/Articles/getArticle.aspx?articleID=97 Also, see : http://msdn2.microsoft.com/en-us/library/ex526337.aspx "Arbitrary file types can be placed in the App_Code folder to create strongly typed objects. Placing Web service files (.wsdl and .xsd files) in the App_Code folder creates strongly typed proxies." Juan T. Llibre, asp.net MVP asp.net faq : http://asp.net.do/faq/ foros de asp.net, en español : http://asp.net.do/foros/ ====================================== > In VS2008 it does not suggest as it used to in VS2005. The only way to place DataSets (i.e. xsd) in App_Code is to > drag them into the folder after creating them. It is not a big deal but I'm curious what the best practice is. > Another difference is that when you Add a DataSet the TableAdapter wizard is no longer automatically launched. > Does your VS2008 behave like VS2005 in the above scenarios? > > And I don't mean data files. >> Try to add them from the main menu. It should suggest to add them in App_Code... >> [quoted text clipped - 9 lines] >>> Does anyone know what is behind the change and what the recommended practice is? >>> Thanks. I know that they are not the same and I never implied that. But again, strange things happen if English is not your native language (like in my case). I meant "DataSet" that you can find in Add New Item template (I think that I got the spelling right, just confirmed it). A corresponding .xsd file (<datasetname>.xsd) is auto-generated after a "DataSet" is ADDED to the project. VS2005 auto-suggests to place the associated .xsd file in App_Code folder (and not App_Data that I mistakenly used in my OP). VS2008 does not do that. > re: > !> DataSets (i.e. xsd) [quoted text clipped - 47 lines] >>>> practice is? >>>> Thanks. Yes, I have the same behavior that is if I chosose "WebSite", "Add new item", "Dataset" it suggest to add to app_code. BTW which model are you using for your project (web site or web application ?) -- Patrice > In VS2008 it does not suggest as it used to in VS2005. The only way to > place DataSets (i.e. xsd) in App_Code is to drag them into the folder [quoted text clipped - 24 lines] >>> practice is? >>> Thanks. I created a new project (i.e. web application) instead of new web site as I used to in VS2005. I was happy to see the model back (i.e. like in VS2003). Thanks for bringing it up. Do you think that could've made a difference? I'll try web site later today. Do you know if best practices are different for web applications? Any links that deal with the subject? Thanks Dan > Yes, I have the same behavior that is if I chosose "WebSite", "Add new > item", "Dataset" it suggest to add to app_code. BTW which model are you [quoted text clipped - 31 lines] >>>> practice is? >>>> Thanks. I made a mistake in my original post - I meant "App_Code". Sorry about that. Anyway, in VS2005 when I add a DataSet to a project the framework auto-suggests to add it to "App_Code" folder. VS2008 does not give me that option and associated xsd files are placed in the root instead. As I said, a minor thing but still annoying. > Try to add them from the main menu. It should suggest to add them in > App_Code... [quoted text clipped - 14 lines] >> practice is? >> Thanks. App_Data is for data, like databases, and data files. Dataset is a class. It has no place in App_Data.  SignatureEliyahu Goldin, Software Developer Microsoft MVP [ASP.NET] http://msmvps.com/blogs/egoldin http://usableasp.net > I'm working on a small Web project in VS2008. In VS2005 it was > recommended that DataSet be placed in App_Data folder (the framework did [quoted text clipped - 5 lines] > practice is? > Thanks. I just noticed that made a silly mistake in my original post. It should've read 'App_Code' instead of 'App_Data'. Sorry about the confusion. I'm going back to VS2005. Could not get it to work. I've got also other issues with VS2008: no table templates, no ATL server libraries for native development, etc. Simply not worth the trouble. Thanks to everyone who tried to help. > I'm working on a small Web project in VS2008. In VS2005 it was > recommended that DataSet be placed in App_Data folder (the framework did [quoted text clipped - 5 lines] > practice is? > Thanks.
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