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  • Which is the "best" data access framework/approach for C# and .NET?

    - by Frans
    (EDIT: I made it a community wiki as it is more suited to a collaborative format.) There are a plethora of ways to access SQL Server and other databases from .NET. All have their pros and cons and it will never be a simple question of which is "best" - the answer will always be "it depends". However, I am looking for a comparison at a high level of the different approaches and frameworks in the context of different levels of systems. For example, I would imagine that for a quick-and-dirty Web 2.0 application the answer would be very different from an in-house Enterprise-level CRUD application. I am aware that there are numerous questions on Stack Overflow dealing with subsets of this question, but I think it would be useful to try to build a summary comparison. I will endeavour to update the question with corrections and clarifications as we go. So far, this is my understanding at a high level - but I am sure it is wrong... I am primarily focusing on the Microsoft approaches to keep this focused. ADO.NET Entity Framework Database agnostic Good because it allows swapping backends in and out Bad because it can hit performance and database vendors are not too happy about it Seems to be MS's preferred route for the future Complicated to learn (though, see 267357) It is accessed through LINQ to Entities so provides ORM, thus allowing abstraction in your code LINQ to SQL Uncertain future (see Is LINQ to SQL truly dead?) Easy to learn (?) Only works with MS SQL Server See also Pros and cons of LINQ "Standard" ADO.NET No ORM No abstraction so you are back to "roll your own" and play with dynamically generated SQL Direct access, allows potentially better performance This ties in to the age-old debate of whether to focus on objects or relational data, to which the answer of course is "it depends on where the bulk of the work is" and since that is an unanswerable question hopefully we don't have to go in to that too much. IMHO, if your application is primarily manipulating large amounts of data, it does not make sense to abstract it too much into objects in the front-end code, you are better off using stored procedures and dynamic SQL to do as much of the work as possible on the back-end. Whereas, if you primarily have user interaction which causes database interaction at the level of tens or hundreds of rows then ORM makes complete sense. So, I guess my argument for good old-fashioned ADO.NET would be in the case where you manipulate and modify large datasets, in which case you will benefit from the direct access to the backend. Another case, of course, is where you have to access a legacy database that is already guarded by stored procedures. ASP.NET Data Source Controls Are these something altogether different or just a layer over standard ADO.NET? - Would you really use these if you had a DAL or if you implemented LINQ or Entities? NHibernate Seems to be a very powerful and powerful ORM? Open source Some other relevant links; NHibernate or LINQ to SQL Entity Framework vs LINQ to SQL

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  • Collect consumers' information

    - by Yongwei Xing
    Hi all When we install some applications in Winodws, we would get a dialog ask us if we want to attend the some consumer program, and send some system/applcation information to the company. Or when the Window server meets failure, it would also send error report to MS. I want to know, how can a application send information from client to report? Best Regards,

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  • Is ASP.net MVC a direct copy of Ruby on Rails concepts?

    - by Greg
    Hi, I'm been developing Ruby on Rails previously. I'm now looking at an ASP.net web app and I'm looking at WebForms and MVC. As I look at MVC it feels as if I'm looking at the result of something a Ruby on Rails developer implemented after being forced to work in MS land. So I'm wondering: Was MVC more or less taken directly from Ruby on Rails and it's concepts? (either intentionally or unintentionally)

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  • WPF4 DatePicker - adding time

    - by Chris
    Now that there is an official MS DatePicker in WPF4, I was wondering if there was a way to let it edit the Time part of a DateTime as well. I can't see anything, but it seems rather obvious to have missed out?

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  • Why does the Ternary\Conditional operator seem significantly faster

    - by Jodrell
    Following on from this question, which I have partially answered. I compile this console app in x64 Release Mode, with optimizations on, and run it from the command line without a debugger attached. using System; using System.Diagnostics; class Program { static void Main() { var stopwatch = new Stopwatch(); var ternary = Looper(10, Ternary); var normal = Looper(10, Normal); if (ternary != normal) { throw new Exception(); } stopwatch.Start(); ternary = Looper(10000000, Ternary); stopWatch.Stop(); Console.WriteLine( "Ternary took {0}ms", stopwatch.ElapsedMilliseconds); stopwatch.Start(); normal = Looper(10000000, Normal); stopWatch.Stop(); Console.WriteLine( "Normal took {0}ms", stopwatch.ElapsedMilliseconds); if (ternary != normal) { throw new Exception(); } Console.ReadKey(); } static int Looper(int iterations, Func<bool, int, int> operation) { var result = 0; for (int i = 0; i < iterations; i++) { var condition = result % 11 == 4; var value = ((i * 11) / 3) % 5; result = operation(condition, value); } return result; } static int Ternary(bool condition, in value) { return value + (condition ? 2 : 1); } static int Normal(int iterations) { if (condition) { return = 2 + value; } return = 1 + value; } } I don't get any exceptions and the output to the console is somthing close to, Ternary took 107ms Normal took 230ms When I break down the CIL for the two logical functions I get this, ... Ternary ... { : ldarg.1 // push second arg : ldarg.0 // push first arg : brtrue.s T // if first arg is true jump to T : ldc.i4.1 // push int32(1) : br.s F // jump to F T: ldc.i4.2 // push int32(2) F: add // add either 1 or 2 to second arg : ret // return result } ... Normal ... { : ldarg.0 // push first arg : brfalse.s F // if first arg is false jump to F : ldc.i4.2 // push int32(2) : ldarg.1 // push second arg : add // add second arg to 2 : ret // return result F: ldc.i4.1 // push int32(1) : ldarg.1 // push second arg : add // add second arg to 1 : ret // return result } Whilst the Ternary CIL is a little shorter, it seems to me that the execution path through the CIL for either function takes 3 loads and 1 or 2 jumps and a return. Why does the Ternary function appear to be twice as fast. I underdtand that, in practice, they are both very quick and indeed, quich enough but, I would like to understand the discrepancy.

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  • SQLInForm.com like plug-in for SQL Server 2008

    - by Vishal Seth
    Is there a plug-in like the java applet @ SQLinForm.com for MS SQL Server Management Studio 2008? I tried SSMS tools based on someone's answer to my previous question but I don't find any functionality to format (beautify/tabify) SQL. If somebody could please point out that in SSMS tools or suggest some other tool (preferably free) Thanks :)

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  • Rewrite rules for wordpress 3.0 (multi-site) for nginx?

    - by Zebra10
    This is the new version being used by wordpress... RewriteEngine On RewriteBase BASE/ #uploaded files RewriteRule ^(.*/)?files/$ index.php [L] RewriteCond %{REQUEST_URI} !.*wp-content/plugins.* RewriteRule ^(.*/)?files/(.*) wp-includes/ms-files.php?file=$2 [L] # add a trailing slash to /wp-admin RewriteCond %{REQUEST_URI} ^.*/wp-admin$ RewriteRule ^(.+)$ $1/ [R=301,L] RewriteCond %{REQUEST_FILENAME} -f [OR] RewriteCond %{REQUEST_FILENAME} -d RewriteRule . - [L] RewriteRule ^([_0-9a-zA-Z-]+/)?(wp-(content|admin|includes).*) $2 [L] RewriteRule ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L] RewriteRule . index.php [L] What would it look like in Nginx?

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  • Really fast C++ html parser

    - by Alessandro
    Hello to all, I'm doing a html text feature extractor in C++; the program need to be REALLY fast: i need to extract a this features in ms per html page and the memory usage needs to be good and finally unicode encoding well be nice. I know how difficult is to have all of this things, but i want a parser close to these things at least. Somebody have a suggestion?

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  • Post bacc CS certificate of Java Certification?

    - by gwozdz
    I have a BS in biology, MS in Environmental Science, but I've been writing software in C++ and Java throughout grad school and a bit in my current job. I'd love to transition to a programming career. I've thought about getting what's called a "Post baccalaureate Certificate" or Java certification in lieu of another degree in CS. Which is more useful in terms of getting a job?

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  • Is Azure an Operating System or a Framework?

    - by Brian Genisio
    MS is calling Azure an Operating System. To me, it feels much more like a framework. I am having a bit of trouble defining the two separately. I have a general intuition, but I am not articulate enough to really say if Azure is really an OS or just a framework sitting on top of Operating Systems.

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  • Git - how do I view the change history of a file

    - by Richard
    How can I view the change history of an individual file, complete with what has changed ? I have got as far as : git log -- filename which shows me the commit history of the file, but how do I get at the content of each of the changes ? Thanks - I'm trying to make the transition from MS SourceSafe and that used to be a simple right click / show history.

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  • How does Dropbox use Python on Windows and OS X?

    - by robotshapes
    In Windows the Dropbox client uses python25.dll and the MS C runtime libraries (msvcp71.dll, etc). On OS X the Python code is compiled bytecode (pyc). My guess is they are using a common library they have written then just have to use different hooks for the different platforms. What method of development is this? It clearly isn't IronPython or PyObjC. This paradigm is so appealing to me, but my CS foo and Google foo are failing me.

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  • SQL: How to order values inside group by

    - by Denis Yaremov
    Consider the following MS SQL Server table: ID | X | Y ------+-------+------- 1 | 1 | 1 2 | 1 | 2 3 | 1 | 3 4 | 2 | 40 5 | 2 | 500 6 | 3 | 1 7 | 3 | 100 8 | 3 | 10 I need to select the ID of the row that has the maximum value of Y grouped by x, i.e: ID | X | Y ------+-------+------- 3 | 1 | 3 5 | 2 | 500 7 | 3 | 100 The query will be nested several times so an optimal performance solution is required... Thank you!

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  • Require further reading on Custom Installers in .Net?

    - by IbrarMumtaz
    Anybody got any good reading articles and tutorials on custom installers as most on the web seem to be outdated? The MS e-book for the 70-536 exam covers this but very lightly, as it does not cover the use of the ServiceProcessInstaller class or something like that??? I'm mentioning this here because I have seen this on quite a few exams.

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