By Jamie Munro
There isn't any have to reinvent the wheel each time you run right into a challenge with ASP.NET's Model-View-Controller (MVC) framework. This concise cookbook presents recipes that can assist you resolve projects many net builders stumble upon on a daily basis. each one recipe comprises the C# code you would like, in addition to a whole case in point of the way to enforce the answer. research sensible concepts for using consumer authentication, offering quicker web page reloads, validating consumer info, filtering seek effects, and lots of different matters regarding MVC3 improvement. those recipes aid you:Restrict entry to perspectives with password security permit clients to add and keep a dossier in your web site enforce AJAX to permit clients to work out up-to-date content material speedy Validate shape enter to make sure the information you seize is what you are expecting Create thumbnails to preview pictures instead of view them vast supply your internet software the power to alter languages Use CAPTCHA to avoid automatic courses from finishing varieties Make URLs extra consumer- and search-engine-friendly with the MapRoute functionality
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Extra info for 20 Recipes for Programming MVC 3: Faster and Smarter Web Development
The work will continue to grow. In the example below, the work is simplified by taking advantage of the Dynamic Linq Library. By default, the Linq library being used allows for strongly-typed expressions to build results from a database. This provides some great advantages, such as full IntelliSense support and compiler-time error messages if a mistake is made. However, as I mentioned above, it also becomes a lot of work to build useful functionality. To add sorting both the BooksController and the Books/Index view require changes.
The view will be changed by adding a new form and textbox input for the user to enter their keyword of choice. Also, to ensure that the user’s keyword is maintained when changing the sort order, filter, or paging through links, the code will be updated to maintain the user’s keyword. Raw(" ") @:Last >> }
Finally the BooksController needs to be updated. In the example below, the Index function is updated to accept a new keyword parameter and if the user has entered a keyword the books title and author are searched by that keyword.
IsNullOrEmpty(Keyword) ? "" : Keyword; #endregion #region Filter Switch ... ToPagedList(currentPage, maxRecords)); ... 11 Uploading a File Through a Form Problem You want to allow users to upload and save a file to your website. Solution Implement a file upload and save the file to disk using HttpPostedFileBase. Discussion In the following example, the previously created views to add and edit books will be updated to allow a user to select a file to upload for the thumbnail field. To begin the Books/Create view must be updated to change the enctype of the form and replace the scaffolded textbox for the thumbnail field.