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• A Simple Online Document Management System Using Asp.net MVC 3

  - by RazanPaul

  Nowadays we have a number of online file management systems (e.g. DropBox, SkyDrive and Google Drive). People can use them to manage different types of documents. However, one might need a system to manage documents when they do not want to publish the company documents to the cloud. In that case, they need to build an online document management system. This project is intended to meet this purpose. However, it is in the early stage. All the functionalities seem working. A lot of work is needed in the UI. Besides this, code needs refactoring. Please find the project at the following link: https://documentmanagementsystem.codeplex.com/

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• JavaScript JSON Error While Tabbing in ASP.NET MVC

  - by MightyZot

  Originally posted on: http://geekswithblogs.net/MightyZot/archive/2013/11/11/javascript-json-error-while-tabbing-in-asp.net-mvc.aspxI sometimes don’t care about validation for a specific control. The RememberMe control in the login form, for example, really doesn’t need validation, so I forget to include the Html.ValidationMessageFor helper line for that control in particular. As a result, when I’m debugging using IE, I get a silly JSON parsing exception when changing focus from one field to another. The exception doesn’t hurt anything, as far as I know, but it’s just plain annoying. If you’re getting this error, and you don’t want validation messages showing up for controls on a form, you can put them in div tags and set the display style on the divs to none. When I have a handful of controls that I don’t want the validation messages for, I just throw them all in the same div and hide it.

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• ASP.NET MVC WebService - Security for Industrial Android Clients

  - by Chris Nevill

  I'm trying to design a system that will allow a bunch of Android devices to securely log into an ASP.NET MVC REST Web service. At present neither side are implemented. However there is an ASP.NET MVC website which the web service will site along side. This is currently using forms authentication. The idea will be that the Android devices will download data from the web service and then be able to work offline storing data in their own local databases, where users will be able to make updates to that data, and then syncing updates back to the main server where possible. The web service will be using HTTPS to prevent calls being intercepted and reduce the risk of calls being intercepted. The system is an industrial system and will not be in used by the general Android population. Instead only authorized Android devices will be authorized by the Web Service to make calls. As such I was thinking of using the Android devices serial number as a username and then a generated long password which the device will be able to pick up - once the device has been authorized server side. The device will also have user logins - but these will not be to log into the web service - just the device itself - since the device and user must be able to work offline. So usernames and passwords will be downloaded and stored on the devices themselves. My question is... what form of security is best setup on the web service? Should it use forms Authentication? Should the username and password just be passed in with each GET/POST call or should it start a session as I have with the website? The Android side causes more confusion. There seems to be a number of options here Spring-Android, Volley, Retrofit, LoopJ, Robo Spice which seems to use the aforementioned Spring, Retrofit or Google HttpClient. I'm struggling to find a simple example which authenticates with a forms based authentication system. Is this because I'm going about this wrong? Is there another option that would better suite this?

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• Retrieving data using stored procedures with LINQ to SQL in an ASP.Net application

  - by nikolaosk

  In this post I would like to present a step by step example on how to use stored procedures with LINQ to SQL. Many people will wonder why I am bothering talking about LINQ to SQL so much. First of all I give a lot of seminars where people want to learn LINQ to SQL.A lot of people like and use LINQ to SQL in their projects. There are a lot of people right now who use it extensively. In this post I will use two stored procedures that return data from the database. If you want to check out how to use...(read more)

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• How different is WPF from ASP.NET [closed]

  - by Tom

  I have been quickly moved over to a different project at work because the project needs more help. I was chosen because they are confident in my abilities and they thought I would be best fit for the next couple weeks to help finish the application out. I am a little nervous. I do tend to pick things up quickly. I was moved to a different project at the beginning of this year and now I know it like the back of my hand. Previously I was on another project. Both of these projects were an ASP.NET web application, which I believe is considered a winforms web application? The project I am moving to is a desktop WPF application. I have read that many people enjoy developing their applications with WPF. I just have never dealt/worked with WPF before. I like to consider myself pretty good at ASP.NET/C# and I do a solid job. We deal with a lot of data processing from the database and report generation. So I do get to experience C# more so than some web applications where the C# end of it is mostly just event driven and simple instructions. How different are the two? Will it be completely foreign to me? Or is it just a different way of looking at a problem and I can familiarize myself quickly? Thanks for the input.

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• ASP.NET Membership - Change password without asking the old (WITH Question and Answer)

  - by djsolid

  I have received many comments and questions about how you can do what is described in this post when you site requires question and answer. The solution is definiterly not the best and should be used with EXTREME caution because in a high traffic website can cause problems but I write it down anyway. We will use reflection in order to solve our problem. And this is the code But this code changes the only instance of MembershipProvider meaning if you access somewhere else from your application the property RequiresQuestionAndAnswer until you set back it’s original value you will get false instead of true. So again be VERY careful. Hope you find it useful!

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• How to profile LINQ to Entities queries in your asp.net applications - part 3

  - by nikolaosk

  In this post I will continue exploring ways on how to profile database activity when using the Entity Framework as the data access layer in our applications. If you want to read the first post of the series click here . If you want to read the second post of the series click here . In this post I will use the excellent (best tool for EF profiling) which is called Entity Framework Profiler. You can download the trial - fully functional edition of this tool from here . I will use the previous example...(read more)

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• Can not Load Type - Starting the ASP.NET Web Site Admin Tool

  - by Latest Microsoft Blogs

  A beginner emailed me last night and I had forgotten about this little ditty ! When you create a NEW project and immediately try to run the Web Site Administration Tool you will get this error. The solution is easy – BUILD FIRST ! I remember being very Read More......(read more)

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• An Introduction to ASP.NET MVC Extensibility

  Because ASP.NET MVC has been designed with extensibility as its design principle; almost every logical step of the processing pipeline can be replaced with your own implementation. In fact, the best way to develop applications with ASP.NET MVC is to extend the system, Simone starts a series that explains how to implement extensions to ASP.NET MVC, starting with the ones at the beginning of the pipeline (routing extensions) and finishing with the view extensions points.

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• Silverlight Developer needs ASP.NET MVC Training [on hold]

  - by Peet Brits

  With Silverlight on the way out, our company wants to embrace HTML5 and related technologies. Background: Our Silverlight project did everything from generating its own models (or data contracts), sending it over WCF, tracking changes, with a whole deal of back-end code to make the ride smoother, but often also cluttered and more complex. Most of the original developers for this project are gone, and we want to embrace something new for future projects. Having done this very useful MVC Jump Start course at Microsoft Virtual Academy, we are all fired up for the next project. The problem is that we have very little in-depth knowledge of all the many different components. The most important hereof is probably Entity Framework, and (for later) Web API. I suppose the best place to start is at the Microsoft ASP.NET websites. Are there any other suggestions for learning from more experienced developers? I am a senior developer, but my knowledge of ASP.NET MVC (and related) is very limited. PS: We have a project deadline at the end of this month.

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• Which platform to choose from .Net or Java [closed]

  - by SahilMahajanMj

  I know that there is a lot healthy discussion about this topic. but my case is entirely different from these discussions. I have just passed out my graduation. During the graduation period, i had done C#.net and java as well. Now i am working as Android programmer in a company. In the recent times, i have heard a lot about pros and cons of these platforms. What our seniors used to suggest that, ASP.net is a lot better than JSP for website developement. .net provides us lot of in built tools and API's for building powerfull applications. Java's platform independancy has always been issue among them. Security fetures are more in java. .Net has more powerfull IDE's. Now i am a bit confused on which platform to choose from these. I found java better from two, so did i prefer to choose android. Also, the discussion always ends with an issue that java has no scope for job as far has .net does. I would like to hear suggestions on this topic, but it would be better, if you consider indian IT market for this discussion.

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• Non RBAC User Roles and Permissions System: checking the user's City

  - by micha12

  We are currently designing a User Roles and Permissions System in our web application (ASP.NET), and it seems that we have several cases that do no fit within the classical Role-Based Access Control (RBAC). I will post several questions, each devoted to a particular case, this being the first post. We have the following case: not to allow a user view a certain page if the user lives in a particular city. This is a simple case that is coded in the following way: if (User.City == “Moscow”) // Allow the user to view the page. else // Do not allow the user to view this page. Though this case is very simple and straightforward, it has nothing to do with the RBAC. On StackOverflow, someone called this an Attribute-based Access Control. Under the classical RBAC, it seems that this case should be designed like this: introduce a permission “City where the person lives”, this permission will have a property City. Then create a role, add a permission of type “City = Moscow” to it and the assign the role to the user. Looks extremely cumbersome. The question is whether it is acceptable to introduce such non-RBAC approaches to our permissions system – does that break the design or not? This might seem a primitive question, but we found that most applications use pure RBAC, and we started to think that we might be doing something wrong. Thank you.

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• How can I implement my own version of a MVC framework in ASP.NET?

  - by ace

  Hi - I would like to know how I can go about implementing my own version of a MVC framework in ASP.NET? I know there already is Microsoft provided ASP.NET MVC framework, but I want to learn MVC and thought the best way would be to implement my own flavor of a MVC framework on top of ASP.NET. Any thoughts / guidance ? Also, can anyone point me to a page where I can learn more about how microsoft implemented ASP.NET MVC ? I'm more interested in learning about the under the hood plumbing that goes on to implement the framework on top of asp.net, do they use HttpHandlers / HttpModules ? Thanks.

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• Membership.Updateuser not really updating the database.

  - by Shimrod

  Hi everybody, I'm currently working on a membership system for my web application, which is based on forms authentication from the framework. I created some users with the integrated tool, and the login is perfectly working. But now what I want to do is to give administrator the capability to create, modify, delete users. So here is what I've got right now: Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Dim muc As MembershipUserCollection = Membership.GetAllUsers() ComboBox1.DataSource = muc ComboBox1.DataValueField = "UserName" ComboBox1.DataTextField = "UserName" ComboBox1.DataBind() End Sub Protected Sub ComboBox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) Handles ComboBox1.SelectedIndexChanged Dim userName As String = ComboBox1.SelectedValue Dim mu As MembershipUser = Membership.GetUser(userName) Dim userRoles As String() = Roles.GetRolesForUser(userName) tbComments.Text = mu.Comment tbEmail.Text = mu.Email lblUserName.Text = mu.UserName End Sub Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click Dim userName As String = ComboBox1.SelectedValue Dim mu As MembershipUser = Membership.GetUser(userName) If Not mu Is Nothing Then Try mu.Comment = tbComments.Text Membership.UpdateUser(mu) mu.Email = tbEmail.Text Membership.UpdateUser(mu) mu.IsApproved = True Membership.UpdateUser(mu) mu = Nothing Catch ex As Exception Console.WriteLine(ex.ToString()) End Try End If DetailPanel.Visible = False End Sub The problem is that the record doesn't seem to be updated in the database. I made the multiple calls to Membership.UpdateUser after reading this blog entry, but it didn't change anything. A strange think I noticed while debugging, is that when I enter the Button1_Click method, Membership.GetUser(userName) returns me values from my precedent attempt ! I don't really understand what I'm missing. Does someone have a clue ? Thanks in advance !

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• Membership.ValidateUser always returns false after upgrade to VS 2010 / .NET 4.0

  - by nw

  Not sure whether this pertains to VS 2010 or to the upgraded framework, but... we are using the Oracle membership provider to authenticate users. Prior to the upgrade everything worked fine, but now Membership.ValidateUser(user, password) returns false despite valid credentials. There is no exception thrown, so it's hard to determine what the problem might be. The website administration tool in VS 2010 is still able to manage users and roles (more or less), so I have no reason to question connectivity. What might the problem be?

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• Sharing an assembly between ASP.NET and Silverlight

  - by vtortola

  Hi, I've created an assembly to share it between my main app and the silverlight app. At the beginning it looked like it was going to work but now I get this exception: "System.IO.FileNotFoundException was caught, Message="Could not load file or assembly 'System.Xml.Linq". I'm using .NET 3.5 Sp1 and Silverlight 3. That shared assembly uses System.Xml.Linq, and it cannot find it... I think because it is trying to find that version in the .NET framework instead looking in the silverlight one. How can I fix this? Cheers. PS: this is the full exception output: System.IO.FileNotFoundException was caught Message="Could not load file or assembly 'System.Xml.Linq, Version=2.0.5.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified." Source="MyApp.Metadata" FileName="System.Xml.Linq, Version=2.0.5.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" FusionLog="=== Pre-bind state information ===\r\nLOG: User = IIS APPPOOL\DefaultAppPool\r\nLOG: DisplayName = System.Xml.Linq, Version=2.0.5.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35\n (Fully-specified)\r\nLOG: Appbase = file:///C:/Users/vtortola.MyApp/Documents/MyApp/MyAppSAS/WebApplication1/WebApplication1/\r\nLOG: Initial PrivatePath = C:\Users\vtortola.MyApp\Documents\MyApp\MyAppSAS\WebApplication1\WebApplication1\bin\r\nCalling assembly : MyApp.Metadata, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null.\r\n===\r\nLOG: This bind starts in default load context.\r\nLOG: Using application configuration file: C:\Users\vtortola.MyApp\Documents\MyApp\MyAppSAS\WebApplication1\WebApplication1\web.config\r\nLOG: Using host configuration file: C:\Windows\Microsoft.NET\Framework64\v2.0.50727\Aspnet.config\r\nLOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework64\v2.0.50727\config\machine.config.\r\nLOG: Post-policy reference: System.Xml.Linq, Version=2.0.5.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35\r\nLOG: The same bind was seen before, and was failed with hr = 0x80070002.\r\n" StackTrace: at MyApp.Metadata.MyAppEntity.Deserialize(String message)

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• ASP.NET MVC 2 with NServiceBus unable to load requested types

  - by dp

  I am trying to use NServiceBus with an ASP.NET MVC 2 website (using VS 2010 and the .NET 4.0 framework). However, when I run the site on my local machine, I get the following error: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information. Here are the relevant steps I have taken: Downloaded the NServiceBus.2.0.0.1145 binaries In my asp.net mvc app, I've added references to NServiceBus.dll and NServiceBus.Core.dll In Global.asax.cs I've added: public static IBus Bus { get; private set; } protected void Application_Start() { AreaRegistration.RegisterAllAreas(); RegisterRoutes(RouteTable.Routes); Bus = NServiceBus.Configure .WithWeb() .Log4Net() .DefaultBuilder() .XmlSerializer() .MsmqTransport() .IsTransactional(false) .PurgeOnStartup(false) .UnicastBus() .ImpersonateSender(false) .CreateBus() .Start(); } In web.config, I've added: <MsmqTransportConfig InputQueue="MyWebClient" ErrorQueue="error" NumberOfWorkerThreads="1" MaxRetries="5"/> <UnicastBusConfig> <MessageEndpointMappings> <add Messages="Messages" Endpoint="MyServerInputQueue"/> </MessageEndpointMappings> </UnicastBusConfig> The error indicates that the problem is with the first line in the Global.asax.cs file. Is it possible that there is a problem with NServiceBus running under .NET 4.0?

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• Error when instantiating .NET/COM interop class via classic ASP

  - by Lee D

  Hi all, I am having a problem when trying to instantiate a C# .NET class that's been exposed to COM in a classic ASP application. I've used tlbexp to generate a typelib and registered it in Component Services; now when trying to create the object as such: Server.CreateObject("The.Class.Name") I am getting the error: Server object error 'ASP 0177 : 80131534' Server.CreateObject Failed I've searched around online for information on this error, and found numerous discussions but no solution. The error code 0x80131534 apparently means "COR_E_TYPEINITIALIZATION, a type failed to initialize", which would suggest the problem would be in the constructor. The constructor of the class in question sets a private field to an instance of another class from the same assembly, and then reads some configuration settings from an XML file. This behaviour is unit tested and I've checked that the file exists; I can't see anything else that could be breaking in there. A few other points which may or may not be of use: A test .NET project referencing the DLL can instantiate the class just fine; however a test VB6 project referencing the TLB blows up with the same error. Both the DLL and the TLB are in the same location. This application is running locally, on Windows XP Professional SP3 and IIS 5.1. The .NET assembly is built with .NET Framework 2.0, although 3.5 is installed on the machine. I know other people who don't get this error on their builds, so I believe it may be something environmental. Any suggestions are welcome as I've been struggling to fix this for some time. Thanks in advance.

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• ASP.NET web setup class is not defined

  - by Wayne Werner

  Hi, I've got an ASP.NET application that I installed by creating a web setup. I ran into a problem where ASP.NET wasn't registered with IIS so it gave me a "installation was interrupted" message that told me exactly nothing. Anyhow, I finally got it installed, and I can access the main page, but it's telling me that my class isn't defined. The dll is in the same directory as the Default.aspx page Here's the main error information Compiler Error Message: BC30002: Type 'SIValidator.SIValidator' is not defined. Source Error: Line 4: Line 5: <script runat="server"> Line 6: Dim validator As New SIValidator.SIValidator() Line 7: Protected table As New arrayList() Line 8: Protected countyByDistrict As New Hashtable() Version Information: Microsoft .NET Framework Version:2.0.50727.1873; ASP.NET Version:2.0.50727.1433 Am I doing it wrong? Is there some obscure setting that may not be set? I'm completely new to this VS deployment deal, so I'm trying to learn the right terms to ask the right questions... Thanks for any help edit: As an aside, when I searched google 5 minutes later, this entry came up as the first result. Would have been awesome if there was an answer for me then :P

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• Do I need to compile my solution with VS2010 in order to benefit from .NET 4.0 new Code Access Secur

  - by leo

  Hello, I currently develop an application in C# with framework .NET 3.5 SP1. In my app, I have satellite assemblies which are not in the same folder as the exe, and that causes me some trouble with FullTrust, as explained here. In order to solve that problem, I wish to use .NET 4.0 whose Code Access Security Policy should allow my satellite assemblies to be FullyTrusted. So my question is: is just installing the framework enough, or do I need to rebuild the solution with VS2010? Thanks

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• Pass values from MasterPage UserControl to child ASPX Page

  - by Leekey

  Hi, Senario: Masterpage with a UserControl and a child ASPX page In the past when using this senario I've used an Interface as a way to pass a value from the UserControl (embedded in a master page) to the masterpage code behind then consume that value in the child aspx page. My question is now that asp.net 4 have arrived is this still a good way to achieve this or is there another or perhaps better way to do it? I've read somewhere that perhaps "delegates" is perhaps another route to take. Any help much appreciated Lk

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• ASP.NET store Image in SQL and retrieve for Asp:Image

  - by sweetcoder

  I am looking to fileupload a picture jpeg,gif,etc into an SQL database on an updateprofilepicture page. Then on the profile page, I want to retrieve the image from an sql database and have it show up in an Asp:Image control. I have much code trying to do this and it doesn't work. The table contains a column of type Image.

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• asp.net "network BIOS command limit has been reached" ASP.NET 2.0 + 3.5

  - by Fermin

  Hi, I'm trying to run tinyMCE texteditor in ASP.NET 2.0 + 3.5 but I get the following error in my web.config file.. An error occurred loading a configuration file: Failed to start monitoring changes to '###\Visual Studio 2005\WebSites\TinyMCE\tinymce\jscripts\tiny_mce\langs' because the network BIOS command limit has been reached. For more information on this error, please refer to Microsoft knowledge base article 810886. Hosting on a UNC share is not supported for the Windows XP Platform. Any ideas how to solve this?

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• Cannot call action method 'System.Web.Mvc.PartialViewResult Foo[T](T)' on controller 'Controller' be

  - by MedicineMan

  Cannot call action method 'System.Web.Mvc.PartialViewResult FooT' on controller 'Controller' because the action method is a generic method <% Html.RenderAction("Foo", model = Model}); %> Is there a workaround for this limitation on ASP MVC 2? I would really prefer to use a generic. The workaround that I have come up with is to change the model type to be an object. It works, but is not preferred: public PartialViewResult Foo<T>(T model) where T : class { // do stuff }

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• Directory.exist method issue in Firefox browser.

  - by swapna

  Hi All, I have a asp.net page which is checking a UNC path on a listbox item change event using Directory.exist method. This works fine in Internet explorer. But when i use firefox and debugging this method returns false even though the directory exists. What could be the reason for this strange problem. Please someone answer this Thanks SNA

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