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• POST Ajax call results in not found using jqGrid and ASP.NET MVC 2 on IIS6

  - by Dan

  This is puzzling me. I deployed an MVC 2 application to IIS6 and everything works fine except for my jqGrid calls to get data. All is well on my development machine, but here are the two URLs I'm working with Local dev web server: POST http://localhost:port/Ctrl.mvc/JsonMethod IIS6 (notice https - not sure if that matters) POST https://www.domain.com/AppName/Ctrl.mvc/JsonMethod The latter URL results in a HTTP 404, which is really confusing as all works well on my local machine. The JsonMethod is properly declared with [AcceptVerbs(HttpVerbs.Post)] Let me know if any more info is needed - I appreciate any and all help with this!

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• ASP.NET: Custom MembershipProvider with a custom user table

  - by blahblah

  I've recently started tinkering with ASP.NET MVC, but this question should apply to classic ASP.NET as well. For what it's worth, I don't know very much about forms authentication and membership providers either. I'm trying to write my own MembershipProvider which will be connected to my own custom user table in my database. My user table contains all of the basic user information such as usernames, passwords, password salts, e-mail addresses and so on, but also information such as first name, last name and country of residence. As far as I understand, the standard way of doing this in ASP.NET is to create a user table without the extra information and then a "profile" table with the extra information. However, this doesn't sound very good to me, because whenever I need to access that extra information I would have to make one extra database query to get it. I read in the book "Pro ASP.NET 3.5 in C# 2008" that having a separate table for the profiles is not a very good idea if you need to access the profile table a lot and have many different pages in your website. Now for the problem at hand... As I said, I'm writing my own custom MembershipProvider subclass and it's going pretty well so far, but now I've come to realize that the CreateUser doesn't allow me to create users in the way I'd like. The method only takes a fixed number of arguments and first name, last name and country of residence are not part of them. So how would I create an entry for the new user in my custom table without this information at hand in CreateUser of my MembershipProvider?

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• How do I create a dynamic data transfer object dynamically from ADO.net model

  - by Richard

  I have a pretty simple database with 5 tables, PK's and relationships setup, etc. I also have an ASP.net MVC3 project I'm using to create simple web services to feed JSON/XML to a mobile app using post/get. To access my data I'm using an ADO.net entity model class to handle generation of the entities, etc. Due to issues with serialization/circular references created by the auto-generated relations from ADO.net entity model, I've been forced to create "Data transfer objects" to strip out the relations and data that doesn't need to be transferred. Question 1: is there an easier way to create DTOs using the entity framework itself? IE, specify only the entity properties I want to convert to Jsonresults? I don't wish to use any 3rd party frameworks if I can help it. Question 2: A side question for Entity Framework, say I create an ADO.net entity model in one project within a solution. Because that model relies on the connection to the database specified in project A, can project B somehow use that model with a similar connection? Both projects are in the same solution. Thanks!

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• LLBLGen Pro v3.1 released!

  - by FransBouma

  Yesterday we released LLBLGen Pro v3.1! Version 3.1 comes with new features and enhancements, which I'll describe briefly below. v3.1 is a free upgrade for v3.x licensees. What's new / changed? Designer Extensible Import system. An extensible import system has been added to the designer to import project data from external sources. Importers are plug-ins which import project meta-data (like entity definitions, mappings and relational model data) from an external source into the loaded project. In v3.1, an importer plug-in for importing project elements from existing LLBLGen Pro v3.x project files has been included. You can use this importer to create source projects from which you import parts of models to build your actual project with. Model-only relationships. In v3.1, relationships of the type 1:1, m:1 and 1:n can be marked as model-only. A model-only relationship isn't required to have a backing foreign key constraint in the relational model data. They're ideal for projects which have to work with relational databases where changes can't always be made or some relationships can't be added to (e.g. the ones which are important for the entity model, but are not allowed to be added to the relational model for some reason). Custom field ordering. Although fields in an entity definition don't really have an ordering, it can be important for some situations to have the entity fields in a given order, e.g. when you use compound primary keys. Field ordering can be defined using a pop-up dialog which can be opened through various ways, e.g. inside the project explorer, model view and entity editor. It can also be set automatically during refreshes based on new settings. Command line relational model data refresher tool, CliRefresher.exe. The command line refresh tool shipped with v2.6 is now available for v3.1 as well Navigation enhancements in various designer elements. It's now easier to find elements like entities, typed views etc. in the project explorer from editors, to navigate to related entities in the project explorer by right clicking a relationship, navigate to the super-type in the project explorer when right-clicking an entity and navigate to the sub-type in the project explorer when right-clicking a sub-type node in the project explorer. Minor visual enhancements / tweaks LLBLGen Pro Runtime Framework Entity creation is now up to 30% faster and takes 5% less memory. Creating an entity object has been optimized further by tweaks inside the framework to make instantiating an entity object up to 30% faster. It now also takes up to 5% less memory than in v3.0 Prefetch Path node merging is now up to 20-25% faster. Setting entity references required the creation of a new relationship object. As this relationship object is always used internally it could be cached (as it's used for syncing only). This increases performance by 20-25% in the merging functionality. Entity fetches are now up to 20% faster. A large number of tweaks have been applied to make entity fetches up to 20% faster than in v3.0. Full WCF RIA support. It's now possible to use your LLBLGen Pro runtime framework powered domain layer in a WCF RIA application using the VS.NET tools for WCF RIA services. WCF RIA services is a Microsoft technology for .NET 4 and typically used within silverlight applications. SQL Server DQE compatibility level is now per instance. (Usable in Adapter). It's now possible to set the compatibility level of the SQL Server Dynamic Query Engine (DQE) per instance of the DQE instead of the global setting it was before. The global setting is still available and is used as the default value for the compatibility level per-instance. You can use this to switch between CE Desktop and normal SQL Server compatibility per DataAccessAdapter instance. Support for COUNT_BIG aggregate function (SQL Server specific). The aggregate function COUNT_BIG has been added to the list of available aggregate functions to be used in the framework. Minor changes / tweaks I'm especially pleased with the import system, as that makes working with entity models a lot easier. The import system lets you import from another LLBLGen Pro v3 project any entity definition, mapping and / or meta-data like table definitions. This way you can build repository projects where you store model fragments, e.g. the building blocks for a customer-order system, a user credential model etc., any model you can think of. In most projects, you'll recognize that some parts of your new model look familiar. In these cases it would have been easier if you would have been able to import these parts from projects you had pre-created. With LLBLGen Pro v3.1 you can. For example, say you have an Oracle schema called CRM which contains the bread 'n' butter customer-order-product kind of model. You create an entity model from that schema and save it in a project file. Now you start working on another project for another customer and you have to use SQL Server. You also start using model-first development, so develop the entity model from scratch as there's no existing database. As this customer also requires some CRM like entity model, you import the entities from your saved Oracle project into this new SQL Server targeting project. Because you don't work with Oracle this time, you don't import the relational meta-data, just the entities, their relationships and possibly their inheritance hierarchies, if any. As they're now entities in your project you can change them a bit to match the new customer's requirements. This can save you a lot of time, because you can re-use pre-fab model fragments for new projects. In the example above there are no tables yet (as you work model first) so using the forward mapping capabilities of LLBLGen Pro v3 creates the tables, PK constraints, Unique Constraints and FK constraints for you. This way you can build a nice repository of model fragments which you can re-use in new projects.

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• AdvancedFormatProvider: Making string.format do more

  - by plblum

  When I have an integer that I want to format within the String.Format() and ToString(format) methods, I’m always forgetting the format symbol to use with it. That’s probably because its not very intuitive. Use {0:N0} if you want it with group (thousands) separators. text = String.Format("{0:N0}", 1000); // returns "1,000"   int value1 = 1000; text = value1.ToString("N0"); Use {0:D} or {0:G} if you want it without group separators. text = String.Format("{0:D}", 1000); // returns "1000"   int value2 = 1000; text2 = value2.ToString("D"); The {0:D} is especially confusing because Microsoft gives the token the name “Decimal”. I thought it reasonable to have a new format symbol for String.Format, "I" for integer, and the ability to tell it whether it shows the group separators. Along the same lines, why not expand the format symbols for currency ({0:C}) and percent ({0:P}) to let you omit the currency or percent symbol, omit the group separator, and even to drop the decimal part when the value is equal to the whole number? My solution is an open source project called AdvancedFormatProvider, a group of classes that provide the new format symbols, continue to support the rest of the native symbols and makes it easy to plug in additional format symbols. Please visit https://github.com/plblum/AdvancedFormatProvider to learn about it in detail and explore how its implemented. The rest of this post will explore some of the concepts it takes to expand String.Format() and ToString(format). AdvancedFormatProvider benefits: Supports {0:I} token for integers. It offers the {0:I-,} option to omit the group separator. Supports {0:C} token with several options. {0:C-$} omits the currency symbol. {0:C-,} omits group separators, and {0:C-0} hides the decimal part when the value would show “.00”. For example, 1000.0 becomes “$1000” while 1000.12 becomes “$1000.12”. Supports {0:P} token with several options. {0:P-%} omits the percent symbol. {0:P-,} omits group separators, and {0:P-0} hides the decimal part when the value would show “.00”. For example, 1 becomes “100 %” while 1.1223 becomes “112.23 %”. Provides a plug in framework that lets you create new formatters to handle specific format symbols. You register them globally so you can just pass the AdvancedFormatProvider object into String.Format and ToString(format) without having to figure out which plug ins to add. text = String.Format(AdvancedFormatProvider.Current, "{0:I}", 1000); // returns "1,000" text2 = String.Format(AdvancedFormatProvider.Current, "{0:I-,}", 1000); // returns "1000" text3 = String.Format(AdvancedFormatProvider.Current, "{0:C-$-,}", 1000.0); // returns "1000.00" The IFormatProvider parameter Microsoft has made String.Format() and ToString(format) format expandable. They each take an additional parameter that takes an object that implements System.IFormatProvider. This interface has a single member, the GetFormat() method, which returns an object that knows how to convert the format symbol and value into the desired string. There are already a number of web-based resources to teach you about IFormatProvider and the companion interface ICustomFormatter. I’ll defer to them if you want to dig more into the topic. The only thing I want to point out is what I think are implementation considerations. Why GetFormat() always tests for ICustomFormatter When you see examples of implementing IFormatProviders, the GetFormat() method always tests the parameter against the ICustomFormatter type. Why is that? public object GetFormat(Type formatType) { if (formatType == typeof(ICustomFormatter)) return this; else return null; } The value of formatType is already predetermined by the .net framework. String.Format() uses the StringBuilder.AppendFormat() method to parse the string, extracting the tokens and calling GetFormat() with the ICustomFormatter type. (The .net framework also calls GetFormat() with the types of System.Globalization.NumberFormatInfo and System.Globalization.DateTimeFormatInfo but these are exclusive to how the System.Globalization.CultureInfo class handles its implementation of IFormatProvider.) Your code replaces instead of expands I would have expected the caller to pass in the format string to GetFormat() to allow your code to determine if it handles the request. My vision would be to return null when the format string is not supported. The caller would iterate through IFormatProviders until it finds one that handles the format string. Unfortunatley that is not the case. The reason you write GetFormat() as above is because the caller is expecting an object that handles all formatting cases. You are effectively supposed to write enough code in your formatter to handle your new cases and call .net functions (like String.Format() and ToString(format)) to handle the original cases. Its not hard to support the native functions from within your ICustomFormatter.Format function. Just test the format string to see if it applies to you. If not, call String.Format() with a token using the format passed in. public string Format(string format, object arg, IFormatProvider formatProvider) { if (format.StartsWith("I")) { // handle "I" formatter } else return String.Format(formatProvider, "{0:" + format + "}", arg); } Formatters are only used by explicit request Each time you write a custom formatter (implementer of ICustomFormatter), it is not used unless you explicitly passed an IFormatProvider object that supports your formatter into String.Format() or ToString(). This has several disadvantages: Suppose you have several ICustomFormatters. In order to have all available to String.Format() and ToString(format), you have to merge their code and create an IFormatProvider to return an instance of your new class. You have to remember to utilize the IFormatProvider parameter. Its easy to overlook, especially when you have existing code that calls String.Format() without using it. Some APIs may call String.Format() themselves. If those APIs do not offer an IFormatProvider parameter, your ICustomFormatter will not be available to them. The AdvancedFormatProvider solves the first two of these problems by providing a plug-in architecture.

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• Converting a generic list into JSON string and then handling it in java script

  - by Jalpesh P. Vadgama

  We all know that JSON (JavaScript Object Notification) is very useful in case of manipulating string on client side with java script and its performance is very good over browsers so let’s create a simple example where convert a Generic List then we will convert this list into JSON string and then we will call this web service from java script and will handle in java script. To do this we need a info class(Type) and for that class we are going to create generic list. Here is code for that I have created simple class with two properties UserId and UserName public class UserInfo { public int UserId { get; set; } public string UserName { get; set; } } Now Let’s create a web service and web method will create a class and then we will convert this with in JSON string with JavaScriptSerializer class. Here is web service class. using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Services; namespace Experiment.WebService { /// <summary> /// Summary description for WsApplicationUser /// </summary> [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [System.ComponentModel.ToolboxItem(false)] // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. [System.Web.Script.Services.ScriptService] public class WsApplicationUser : System.Web.Services.WebService { [WebMethod] public string GetUserList() { List<UserInfo> userList = new List<UserInfo>(); for (int i = 1; i <= 5; i++) { UserInfo userInfo = new UserInfo(); userInfo.UserId = i; userInfo.UserName = string.Format("{0}{1}", "J", i.ToString()); userList.Add(userInfo); } System.Web.Script.Serialization.JavaScriptSerializer jSearializer = new System.Web.Script.Serialization.JavaScriptSerializer(); return jSearializer.Serialize(userList); } } } Note: Here you must have this attribute here in web service class ‘[System.Web.Script.Services.ScriptService]’ as this attribute will enable web service to call from client side. Now we have created a web service class let’s create a java script function ‘GetUserList’ which will call web service from JavaScript like following function GetUserList() { Experiment.WebService.WsApplicationUser.GetUserList(ReuqestCompleteCallback, RequestFailedCallback); } After as you can see we have inserted two call back function ReuqestCompleteCallback and RequestFailedCallback which handle errors and result from web service. ReuqestCompleteCallback will handle result of web service and if and error comes then RequestFailedCallback will print the error. Following is code for both function. function ReuqestCompleteCallback(result) { result = eval(result); var divResult = document.getElementById("divUserList"); CreateUserListTable(result); } function RequestFailedCallback(error) { var stackTrace = error.get_stackTrace(); var message = error.get_message(); var statusCode = error.get_statusCode(); var exceptionType = error.get_exceptionType(); var timedout = error.get_timedOut(); // Display the error. var divResult = document.getElementById("divUserList"); divResult.innerHTML = "Stack Trace: " + stackTrace + "<br/>" + "Service Error: " + message + "<br/>" + "Status Code: " + statusCode + "<br/>" + "Exception Type: " + exceptionType + "<br/>" + "Timedout: " + timedout; } Here in above there is a function called you can see that we have use ‘eval’ function which parse string in enumerable form. Then we are calling a function call ‘CreateUserListTable’ which will create a table string and paste string in the a div. Here is code for that function. function CreateUserListTable(userList) { var tablestring = '<table ><tr><td>UsreID</td><td>UserName</td></tr>'; for (var i = 0, len = userList.length; i < len; ++i) { tablestring=tablestring + "<tr>"; tablestring=tablestring + "<td>" + userList[i].UserId + "</td>"; tablestring=tablestring + "<td>" + userList[i].UserName + "</td>"; tablestring=tablestring + "</tr>"; } tablestring = tablestring + "</table>"; var divResult = document.getElementById("divUserList"); divResult.innerHTML = tablestring; } Now let’s create div which will have all html that is generated from this function. Here is code of my web page. We also need to add a script reference to enable web service from client side. Here is all HTML code we have. <form id="form1" runat="server"> <asp:ScriptManager ID="myScirptManger" runat="Server"> <Services> <asp:ServiceReference Path="~/WebService/WsApplicationUser.asmx" /> </Services> </asp:ScriptManager> <div id="divUserList"> </div> </form> Now as we have not defined where we are going to call ‘GetUserList’ function so let’s call this function on windows onload event of javascript like following. window.onload=GetUserList(); That’s it. Now let’s run it on browser to see whether it’s work or not and here is the output in browser as expected. That’s it. This was very basic example but you can crate your own JavaScript enabled grid from this and you can see possibilities are unlimited here. Stay tuned for more.. Happy programming.. Technorati Tags: JSON,Javascript,ASP.NET,WebService

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• Visual Studio 2010 and .NET 4 Released

  - by Latest Microsoft Blogs

  The final release of Visual Studio 2010 and .NET 4 is now available. Download and Install Today MSDN subscribers, as well as WebsiteSpark / BizSpark / DreamSpark members, can now download the final releases of Visual Studio 2010 and TFS 2010 through the Read More......(read more)

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• Asp.net session on browser close

  - by budugu

  Note: Cross posted from Vijay Kodali's Blog. Permalink How to capture logoff time when user closes browser? Or How to end user session when browser closed? These are some of the frequently asked questions in asp.net forums. In this post I'll show you how to do this when you're building an ASP.NET web application. Before we start, one fact: There is no full-proof technique to catch the browser close event for 100% of time. The trouble lies in the stateless nature of HTTP. The Web server is out of the picture as soon as it finishes sending the page content to the client. After that, all you can rely on is a client side script. Unfortunately, there is no reliable client side event for browser close. Solution: The first thing you need to do is create the web service. I've added web service and named it AsynchronousSave.asmx.    Make this web service accessible from Script, by setting class qualified with the ScriptServiceAttribute attribute...  Add a method (SaveLogOffTime) marked with [WebMethod] attribute. This method simply accepts UserId as a string variable and writes that value and logoff time to text file. But you can pass as many variables as required. You can then use this information for many purposes. To end user session, you can just call Session.Abandon() in the above web method. To enable web service to be called from page’s client side code, add script manager to page. Here i am adding to SessionTest.aspx page When the user closes the browser, onbeforeunload event fires on the client side. Our final step is adding a java script function to that event, which makes web service calls. The code is simple but effective My Code HTML:( SessionTest.aspx ) C#:( SessionTest.aspx.cs ) That’s’ it. Run the application and after browser close, open the text file to see the log off time. The above code works well in IE 7/8. If you have any questions, leave a comment.

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• New debugger extension for .NET, Psscor2, released

  - by Latest Microsoft Blogs

  I wanted to be the first to inform everyone that there is a major update to the debugger extension story for .NET.  Psscor2 has been released!  This is a superset of the SOS.dll that ships with the framework. This extension has a lot of advantages Read More......(read more)

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• A simple DotNetNuke article module with C# and VB.NET Source

  - by Chris Hammond

  For the DotNetNuke Connections conference last month I provided an advanced DotNetNuke module development course as a pre-conference training session. That training covered details on how to implement some of the newer features in the DotNetNuke platform within custom modules, mainly ContentItem integration and Taxonomy features. For the course I created a very basic Article module for DotNetNuke, ultimately naming it DNNSimpleArticle. For the course I created both a C# and a VB.NET version of the...(read more)

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• Membership in ASP.Net applications - part 3

  - by nikolaosk

  This is the third post in a series of posts regarding ASP.Net built in membership functionality,providers,controls. You can read the first one post one here . You can read the second post here . In this post I would like to investigate how to use the Membership class methods to achieve the same functionality we have with the login web server controls.The login web server controls live inside the .aspx pages and access the underlying abstract membership classes to perform the desired functionality...(read more)

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• ASP.NET developers build rich management system using the VWG extension

  - by Visual WebGui

  When The Center for Organ Recovery & Education (CORE) decided they needed a web application to allow easy access to the expenses management system they initially went to ASP.NET web forms combined with CSS. The outcome, however, was not satisfying enough as it appeared bland and lacked in richness. So in order to enrich the UI and give the web application some glitz, Visual WebGui was selected. Visual WebGui provided the needed richness and the familiar Windows look and feel also made the transition...(read more)

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• ASP.NET MVC Generic Controllers and Spring.NET

  - by Jason

  Hello, I am creating an application using ASP.NET MVC (2) and Spring.NET. Since most of my Controller implementations just implement the similar CRUD operations, I would like to just create a single Generic controller, as explained here: http://stackoverflow.com/questions/848904/in-asp-net-mvc-is-it-possible-to-make-a-generic-controller However, the above example doesn't take DI frameworks into consideration. What I'm thinking is to create this (warning: this is an ugly mass of code I need help with): public SpringGenericControllerFactory : DefaultControllerFactory { public IController CreateController(RequestContext requestContext, string controllerName) { // Determine the controller type to return Type controllerType = Type.GetType("MyController").MakeGenericType(Type.GetType(controllerName)); // Return the controller return Activator.CreateInstance(controllerType) as IController; } } The entries in objects.xml would look something like this: <object id="controllerFactory" type="Application.Controllers.SpringGenericControllerFactory" /> <object id="DepartmentController" factory-method="CreateController" factory-object="controllerFactory" /> Can anyone pick through this and offer advice?

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• Asynchronous Streaming in ASP.NET WebApi

  - by andresv

   Hi everyone, if you use the cool MVC4 WebApi you might encounter yourself in a common situation where you need to return a rather large amount of data (most probably from a database) and you want to accomplish two things: Use streaming so the client fetch the data as needed, and that directly correlates to more fetching in the server side (from our database, for example) without consuming large amounts of memory. Leverage the new MVC4 WebApi and .NET 4.5 async/await asynchronous execution model to free ASP.NET Threadpool threads (if possible).  So, #1 and #2 are not directly related to each other and we could implement our code fulfilling one or the other, or both. The main point about #1 is that we want our method to immediately return to the caller a stream, and that client side stream be represented by a server side stream that gets written (and its related database fetch) only when needed. In this case we would need some form of "state machine" that keeps running in the server and "knows" what is the next thing to fetch into the output stream when the client ask for more content. This technique is generally called a "continuation" and is nothing new in .NET, in fact using an IEnumerable<> interface and the "yield return" keyword does exactly that, so our first impulse might be to write our WebApi method more or less like this:           public IEnumerable<Metadata> Get([FromUri] int accountId)         {             // Execute the command and get a reader             using (var reader = GetMetadataListReader(accountId))             {                 // Read rows asynchronously, put data into buffer and write asynchronously                 while (reader.Read())                 {                     yield return MapRecord(reader);                 }             }         }   While the above method works, unfortunately it doesn't accomplish our objective of returning immediately to the caller, and that's because the MVC WebApi infrastructure doesn't yet recognize our intentions and when it finds an IEnumerable return value, enumerates it before returning to the client its values. To prove my point, I can code a test method that calls this method, for example:        [TestMethod]         public void StreamedDownload()         {             var baseUrl = @"http://localhost:57771/api/metadata/1";             var client = new HttpClient();             var sw = Stopwatch.StartNew();             var stream = client.GetStreamAsync(baseUrl).Result;             sw.Stop();             Debug.WriteLine("Elapsed time Call: {0}ms", sw.ElapsedMilliseconds); } So, I would expect the line "var stream = client.GetStreamAsync(baseUrl).Result" returns immediately without server-side fetching of all data in the database reader, and this didn't happened. To make the behavior more evident, you could insert a wait time (like Thread.Sleep(1000);) inside the "while" loop, and you will see that the client call (GetStreamAsync) is not going to return control after n seconds (being n == number of reader records being fetched).Ok, we know this doesn't work, and the question would be: is there a way to do it?Fortunately, YES!  and is not very difficult although a little more convoluted than our simple IEnumerable return value. Maybe in the future this scenario will be automatically detected and supported in MVC/WebApi.The solution to our needs is to use a very handy class named PushStreamContent and then our method signature needs to change to accommodate this, returning an HttpResponseMessage instead of our previously used IEnumerable<>. The final code will be something like this: public HttpResponseMessage Get([FromUri] int accountId)         {             HttpResponseMessage response = Request.CreateResponse();             // Create push content with a delegate that will get called when it is time to write out              // the response.             response.Content = new PushStreamContent(                 async (outputStream, httpContent, transportContext) =>                 {                     try                     {                         // Execute the command and get a reader                         using (var reader = GetMetadataListReader(accountId))                         {                             // Read rows asynchronously, put data into buffer and write asynchronously                             while (await reader.ReadAsync())                             {                                 var rec = MapRecord(reader);                                 var str = await JsonConvert.SerializeObjectAsync(rec);                                 var buffer = UTF8Encoding.UTF8.GetBytes(str);                                 // Write out data to output stream                                 await outputStream.WriteAsync(buffer, 0, buffer.Length);                             }                         }                     }                     catch(HttpException ex)                     {                         if (ex.ErrorCode == -2147023667) // The remote host closed the connection.                          {                             return;                         }                     }                     finally                     {                         // Close output stream as we are done                         outputStream.Close();                     }                 });             return response;         } As an extra bonus, all involved classes used already support async/await asynchronous execution model, so taking advantage of that was very easy. Please note that the PushStreamContent class receives in its constructor a lambda (specifically an Action) and we decorated our anonymous method with the async keyword (not a very well known technique but quite handy) so we can await over the I/O intensive calls we execute like reading from the database reader, serializing our entity and finally writing to the output stream.  Well, if we execute the test again we will immediately notice that the a line returns immediately and then the rest of the server code is executed only when the client reads through the obtained stream, therefore we get low memory usage and far greater scalability for our beloved application serving big chunks of data.Enjoy!Andrés.        

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• Why should I adopt MVC?

  - by Andrew

  I decided to get my hands wet and got the YII framework for PHP. I created my first application, then created new controller, model and view. Connected to database, got my record passed from controller to the view and printed the hello world. I am confused now. If I have to do the same thing for each page, this seems like a nightmare to me. In each controller I have to do a lot of same operations - declare variables, and pass them to views. I also need to create models for each page and this is all confusing to me. In my idea the main goal of development is to avoid duplication, but what I see here is lots and lots of duplicated code. Please advise and clarify. Maybe you could suggest a good reading about MVC and coding patterns and best practices in MVC. Because so far, it takes much more time to create a small site using MVC than using my own programming schema.

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• Deploying Asp.net MVC web application [migrated]

  - by Pankaj Upadhyay

  I have been trying to find a neat tutorial, guide or step by step instructions for deploying an Asp.net MVC3 webapp but have found nothing so far. Everyone talks about his version of the stroy and different type of MVC versions. Right now, I have build a simple Asp.net MVC web application which i need to deploy on my shared hosting account. In a very simple manner, I need to know which files should i copy. Do i upload everything in my webproject directory to the server including the controller directory, views, models, content and bin directory ?. What about the Global.asax, web.config, packages.config, myapp.publish.xml. In short, I have no idea which files should be uploaded and which should be not. I am sure of one thing that i need few(MVC and Razor dlls) following dlls in bin directory. Just treat me as someone who has never deployed any website NOTE:- I don't have VS SP1 installed and it doesn't install either. Basically i need a manual procedure.

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• Unit Testing (xUnit) an ASP.NET Mvc Controller with a custom input model?

  - by Danny Douglass

  I'm having a hard time finding information on what I expect to be a pretty straightforward scenario. I'm trying to unit test an Action on my ASP.NET Mvc 2 Controller that utilizes a custom input model w/ DataAnnotions. My testing framework is xUnit, as mentioned in the title. Here is my custom Input Model: public class EnterPasswordInputModel { [Required(ErrorMessage = "")] public string Username { get; set; } [Required(ErrorMessage = "Password is a required field.")] public string Password { get; set; } } And here is my Controller (took out some logic to simplify for this ex.): [HttpPost] public ActionResult EnterPassword(EnterPasswordInputModel enterPasswordInput) { if (!ModelState.IsValid) return View(); // do some logic to validate input // if valid - next View on successful validation return View("NextViewName"); // else - add and display error on current view return View(); } And here is my xUnit Fact (also simplified): [Fact] public void EnterPassword_WithValidInput_ReturnsNextView() { // Arrange var controller = CreateLoginController(userService.Object); // Act var result = controller.EnterPassword( new EnterPasswordInputModel { Username = username, Password = password }) as ViewResult; // Assert Assert.Equal("NextViewName", result.ViewName); } When I run my test I get the following error on my test fact when trying to retrieve the controller result (Act section): System.NullReferenceException: Object reference not set to an instance of an object. Thanks in advance for any help you can offer!

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• jQuery + Perl CGI to vb.net transition

  - by user1257458

  I've been developing oracle database-heavy "web applications" forever by building my html by hand, adding some jquery to handle ajax requests (html inserts for forms processing etc), and always did my server side stuff in perl cgi. I really love how easy it is to read some form input, execute some select statements through dbi (SO EASY), and generate HTML to be inserted by the jquery request. That's a web application to me. However, my new boss builds everything in visual studio 2010, vb.net, usually webforms. So, for work reasons, I now need to start developing in vb.net so it can be collectively maintained, and I'm just seeking advice on where to start learning/how to approach this. I know I could at least learn ASP.net and VB.net, and create a webform, have it read parameters, return HTML, etc. which would allow me to use my previously written HTML and client-side scripts (jQuery). Although- since we're moving heavily to mobile applications I really need to reduce client-side processing load. Is there any advantage to my boss' method? Thanks a ton.

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• ASP.NET MVC 2 InputExtensions different on server than local machine

  - by Mike

  Hi everyone, So this is kind of a crazy problem to me, but I've had no luck Googling it. I have an ASP.NET MVC 2 application (under .NET 4.0) running locally just fine. When I upload it to my production server (under shared hosting) I get Compiler Error Message: CS1061: 'System.Web.Mvc.HtmlHelper' does not contain a definition for 'TextBoxFor' and no extension method 'TextBoxFor' accepting a first argument of type 'System.Web.Mvc.HtmlHelper' could be found (are you missing a using directive or an assembly reference?) for this code: <%= this.Html.TextBoxFor(person => person.LastName) %> This is one of the new standard extension methods in MVC 2. So I wrote some diagnostic code: System.Reflection.Assembly ass = System.Reflection.Assembly.GetAssembly(typeof(InputExtensions)); Response.Write("From GAC: " + ass.GlobalAssemblyCache.ToString() + "<br/>"); Response.Write("ImageRuntimeVersion: " + ass.ImageRuntimeVersion.ToString() + "<br/>"); Response.Write("Version: " + System.Diagnostics.FileVersionInfo.GetVersionInfo(ass.Location).ToString() + "<br/>"); foreach (var method in typeof(InputExtensions).GetMethods()) { Response.Write(method.Name + "<br/>"); } running locally (where it works fine), I get this as output: From GAC: True ImageRuntimeVersion: v2.0.50727 Version: File: C:\Windows\assembly\GAC_MSIL\System.Web.Mvc\2.0.0.0__31bf3856ad364e35\System.Web.Mvc.dll InternalName: System.Web.Mvc.dll OriginalFilename: System.Web.Mvc.dll FileVersion: 2.0.50217.0 FileDescription: System.Web.Mvc.dll Product: Microsoft® .NET Framework ProductVersion: 2.0.50217.0 Debug: False Patched: False PreRelease: False PrivateBuild: False SpecialBuild: False Language: Language Neutral CheckBox CheckBox CheckBox CheckBox CheckBox CheckBox CheckBoxFor CheckBoxFor CheckBoxFor Hidden Hidden Hidden Hidden HiddenFor HiddenFor HiddenFor Password Password Password Password PasswordFor PasswordFor PasswordFor RadioButton RadioButton RadioButton RadioButton RadioButton RadioButton RadioButtonFor RadioButtonFor RadioButtonFor TextBox TextBox TextBox TextBox TextBoxFor TextBoxFor TextBoxFor ToString Equals GetHashCode GetType and when running on the production server (where it fails), I see: From GAC: True ImageRuntimeVersion: v2.0.50727 Version: File: C:\Windows\assembly\GAC_MSIL\System.Web.Mvc\2.0.0.0__31bf3856ad364e35\System.Web.Mvc.dll InternalName: System.Web.Mvc.dll OriginalFilename: System.Web.Mvc.dll FileVersion: 2.0.41001.0 FileDescription: System.Web.Mvc.dll Product: Microsoft® .NET Framework ProductVersion: 2.0.41001.0 Debug: False Patched: False PreRelease: False PrivateBuild: False SpecialBuild: False Language: Language Neutral CheckBox CheckBox CheckBox CheckBox CheckBox CheckBox Hidden Hidden Hidden Hidden Hidden Hidden Password Password Password Password RadioButton RadioButton RadioButton RadioButton RadioButton RadioButton TextBox TextBox TextBox TextBox ToString Equals GetHashCode GetType note that "TextBoxFor" is not present (hence the error). I have MVC referenced in the csproj: <Reference Include="System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL"> <SpecificVersion>True</SpecificVersion> <HintPath>References\System.Web.Mvc.dll</HintPath> <Private>True</Private> </Reference> I just can't figure it what to do next. Thoughts? Thanks! -Mike

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• Will there be any problem if i inherit aspx page from System.Web.Mvc.ViewPage

  - by Vinni

  I am developing a website which will be having both asp.net pages and MVC pages in it, So I have BaseWebPage class which will be used for both asp.net pages and MVC Views. but My BaseWebPage class is inherited from System.Web.Mvc.ViewPage, So Will there be any code/ functionality break for normal asp.net pages, because System.Web.Mvc.ViewPage is overriding some of the Pagelife cycle methods.

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• ASP.Net MVC View within WebForms Application

  - by Neil

  I am adding functionality to an ASP.Net webforms application and we've decided that new development will be done MVC with a view to move all functionality over eventually. Obviously, MVC and WebForms play together rather nicely when it comes to accessing an MVC action via a URL. However, I'd like to display the MVC view within an existing tab (telerik) control on a WebForm page. This view will be using js/css file so that will need to be considered also.

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• ASP.NET MVC & Web Services

  - by ANaimi

  Hello, Does adding a Web Service to my ASP.NET MVC project break the whole concept of MVC? That Web Service (WCF) depends on the Model layer from my MVC project to communicate with the back-end (so it looks to me like it needs to be part of the MVC solution). Should I add this to the Controller or Model layer?

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• asp.net mvc 2 method not found

  - by Debra

  When I run my asp.net mvc 2 site (shared hosting) I get the following error: Method not found: 'Void System.Web.Mvc.DataAnnotationsModelValidatorProvider.set_AddImplicitRequiredAttributeForValueTypes(Boolean)'. In the bin directory I have System.Web.Mvc.dll version 2.0.50217.0 On my local dev machine it runs fine. Is it possible that if the hosting provider has a different mvc 2 version installed it would cause this error? Thank you!

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• Understanding 400 Bad Request Exception

  - by imran_ku07

      Introduction:          Why I am getting this exception? What is the cause of this error. Developers are always curious to know the root cause of an exception, even though they found the solution from elsewhere. So what is the reason of this exception (400 Bad Request).The answer is security. Security is an important feature for any application. ASP.NET try to his best to give you more secure application environment as possible. One important security feature is related to URLs. Because there are various ways a hacker can try to access server resource. Therefore it is important to make your application as secure as possible. Fortunately, ASP.NET provides this security by throwing an exception of Bad Request whenever he feels. In this Article I am try to present when ASP.NET feels to throw this exception. You will also see some new ASP.NET 4 features which gives developers some control on this situation.   Description:   http.sys Restrictions:           It is interesting to note that after deploying your application on windows server that runs IIS 6 or higher, the first receptionist of HTTP request is the kernel mode HTTP driver: http.sys. Therefore for completing your request successfully you need to present your validity to http.sys and must pass the http.sys restriction.           Every http request URL must not contain any character from ASCII range of 0x00 to 0x1F, because they are not printable. These characters are invalid because these are invalid URL characters as defined in RFC 2396 of the IETF. But a question may arise that how it is possible to send unprintable character. The answer is that when you send your request from your application in binary format.           Another restriction is on the size of the request. A request containg protocal, server name, headers, query string information and individual headers sent along with the request must not exceed 16KB. Also individual header should not exceed 16KB.           Any individual path segment (the portion of the URL that does not include protocol, server name, and query string, for example, http://a/b/c?d=e,  here the b and c are individual path) must not contain more than 260 characters. Also http.sys disallows URLs that have more than 255 path segments.           If any of the above rules are not follow then you will get 400 Bad Request Exception. The reason for this restriction is due to hack attacks against web servers involve encoding the URL with different character representations.           You can change the default behavior enforced by http.sys using some Registry switches present at HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\HTTP\Parameters    ASP.NET Restrictions:           After passing the restrictions enforced by the kernel mode http.sys then the request is handed off to IIS and then to ASP.NET engine and then again request has to pass some restriction from ASP.NET in order to complete it successfully.           ASP.NET only allows URL path lengths to 260 characters(only paths, for example http://a/b/c/d, here path is from a to d). This means that if you have long paths containing 261 characters then you will get the Bad Request exception. This is due to NTFS file-path limit.           Another restriction is that which characters can be used in URL path portion.You can use any characters except some characters because they are called invalid characters in path. Here are some of these invalid character in the path portion of a URL, <,>,*,%,&,:,\,?. For confirming this just right click on your Solution Explorer and Add New Folder and name this File to any of the above character, you will get the message. Files or folders cannot be empty strings nor they contain only '.' or have any of the following characters.....            For checking the above situation i have created a Web Application and put Default.aspx inside A%A folder (created from windows explorer), then navigate to, http://localhost:1234/A%25A/Default.aspx, what i get response from server is the Bad Request exception. The reason is that %25 is the % character which is invalid URL path character in ASP.NET. However you can use these characters in query string.           The reason for these restrictions are due to security, for example with the help of % you can double encode the URL path portion and : is used to get some specific resource from server.   New ASP.NET 4 Features:           It is worth to discuss the new ASP.NET 4 features that provides some control in the hand of developer. Previously we are restricted to 260 characters path length and restricted to not use some of characters, means these characters cannot become the part of the URL path segment.           You can configure maxRequestPathLength and maxQueryStringLength to allow longer or shorter paths and query strings. You can also customize set of invalid character using requestPathInvalidChars, under httpruntime element. This may be the good news for someone who needs to use some above character in their application which was invalid in previous versions. You can find further detail about new ASP.NET features about URL at here           Note that the above new ASP.NET settings will not effect http.sys. This means that you have pass the restriction of http.sys before ASP.NET ever come in to the action. Note also that previous restriction of http.sys is applied on individual path and maxRequestPathLength is applied on the complete path (the portion of the URL that does not include protocol, server name, and query string). For example, if URL is http://a/b/c/d?e=f, then maxRequestPathLength will takes, a/b/c/d, into account while http.sys will take a, b, c individually.   Summary:           Hopefully this will helps you to know how some of initial security features comes in to play, but i also recommend that you should read (at least first chapter called Initial Phases of a Web Request of) Professional ASP.NET 2.0 Security, Membership, and Role Management by Stefan Schackow. This is really a nice book.

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• Watching Green Day and discovering Sitecore, priceless.

  - by jonel

  I’m feeling inspired and I’d like to share a technique we’ve implemented in Sitecore to address a URL mapping from our legacy site that we wanted to carry over to the new beautiful Littelfuse.com. The challenge is to carry over all of our series URLs that have been published in our datasheets, we currently have a lot of series and having to create a manual mapping for those could be really tedious. It has the format of http://www.littelfuse.com/series/series-name.html, for instance, http://www.littelfuse.com/series/flnr.html. It would have been easier if we have our information architecture defined like this but that would have been too easy. I took a solution that is 2-fold. First, I need to create a URL rewrite rule using the IIS URL Rewrite Module 2.0. Secondly, we need to implement a handler that will take care of the actual lookup of the actual series. It will be amazing after we’ve gone over the details. Let’s start with the URL rewrite. Create a new blank rule, you can name it with anything you wish. The key part here to talk about is the Pattern and the Action groups. The Pattern is nothing but regex. Basically, I’m telling it to match the regex I have defined. In the Action group, I am telling it what to do, in this case, rewrite to the redirect.aspx webform. In this implementation, I will be using Rewrite instead of redirect so the URL sticks in the browser. If you opt to use Redirect, then the URL bar will display the new URL our webform will redirect to. Let me explain one small thing, the (\w+) in my Pattern group’s regex, will actually translate to {R:1} in my Action’s group. This is where the magic begins. Now let’s see what our Redirect.aspx contains. Remember our {R:1} above which becomes the query string variable s? This are basic .Net code. The only thing that you will probably ask is the LFSearch class. It’s our own implementation of addressing finding items by using a field search, we supply the fieldname, the value of the field, the template name of the item we are after, and the value of true or false if we want to do an exact search, or not. If eureka, then redirect to that item’s Path (Url). If not, tell the user tough luck, here’s the 404 page as a consolation. Amazing, ain’t it?

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