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• Does the use of mongodb enhance extending/changing database driven applications?

  - by developer10214

  When an application is created which need to store data, an SQL database is used very often. So did I in a lot of asp.net applications. The resulting applications have often an ORM like the entity framework and maybe a business layer. So when such an application needs to be extended(let's say you have to add a comment property to an object), you have to change/extend the database, then the ORM and the business layer and so on. To deploy the changes you have to update the target database and the application. I know that things like code first and fluent can make this approach easier. I tried mongodb, I only used the standard driver and I had to extend some objects and all I had to do was changing the code. So it feels that such approaches are much easier to realize when using mongodb. I don't have much experience with larger applications an mongodb. I know that a SQL database or mongodb doesn't fit for all needs and both have their pros and cons. I want to know if my feeling is right, if yes I would choose rather choose mongodb than SQL database.

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• Best practices for upgrading user data when updating versions of software

  - by Javy

  In my code I check the current version of the software on launch and compare it to the version stored in the user's data file(s). If the version is newer, then I call different methods to update the old data to the newer data version, if necessary. I usually have to make a new method to convert the data with each update that changes user data in some way, and cannot remove the old ones in case there was someone who missed an update. So the app must be able to go through each method call and update their data until they get their data current. With larger data sets, this could be a problem. In addition, I recently had a brief discussion with another StackOverflow user this and he indicated he always appended a date stamp to the filename to manage data versions, although his reasoning as to why this was better than storing the version data in the file itself was unclear. Since I've rarely seen management of user data versions in books I've read, I'm curious what are the best practices for naming user data files and procedures for updating older data to newer versions.

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• Why would he say "We don't want to support MVC3"?

  - by MadBurn

  I work in a small shop at a fairly big company doing intranet web applications. By small, I mean there is 1 other guy in my position... and he graduated with me last December. (we aren't the only IT, but the only ones in our field) We are switching out an old COBOL system and converting it's only used application suite to a Web App. My company has contracted to a Web Application firm to help with this process who has chosen ASP.NET MVC, during one of the important meetings I asked if they will be using MVC2 or MVC3. Their lead developer said: "MVC2, we don't want to support MVC3. haha" My question is, why is this? This was several months ago and I've been doing extensive and self training gearing up for the MVC switch. From everything I am understanding, MVC3 is just like MVC2 if you don't use Razor and it fixes a number of smaller bugs that MVC2 had. So in my eyes, I can't see any reason to NOT use MCV3. There has to be something I'm missing. Since I don't really have any mentors to turn to in the real world, I'm coming here. What problems are there with MVC3 that might possibly lead him to say this that I'm missing?

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• How to tackle archived who-is personal data with opt-out?

  - by defaye

  As far as I understand it, it is possible to opt-out (in the UK at least) of having your address details displayed on who-is information of a domain for non-trading individuals. What I want to know is, after opt-out, how do individuals combat archived data? Is there any enforcement of this? How many who-is websites are there which archive data and what rights do we have to force them to remove that data without paying absurd fees? In the case of capitulating to these scoundrels, what point is it in paying for the removal of archived data if that data can presumably resurface on another who-is repository? In other words, what strategy is one supposed to take, besides being wiser after the fact?

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• How can I pull data from PeopleSoft on demand?

  - by trpt4him

  I work in IT at a university and I'm working with about 5 different departments to develop a new process for students to apply to a specific school within the university (not the university as a whole). We're using a web-based college application vendor and adding the applicant questions for the school itself to the main university application. Currently the main application feeds into PeopleSoft. The IT staff here is building a new table to hold just our school's applicant data. I want to be able to access that data from PeopleSoft for use in external applications, but our IT staff doesn't really seem to understand what I'm requesting, as they simply tell me I can have access to the PS query tools. The problem is, I don't want to run just ad hoc queries, I want to be able to connect from outside PeopleSoft and show current data within the external app. I am unable to find documentation or get a clear answer to my question. Does PeopleSoft support access via a web services API or anything similar, and does that sound like the right direction for me to take?

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• Silverlight 4 + RIA Services - Ready for Business: Validating Data

    To continue our series lets look at data validation our business applications. Updating data is great, but when you enable data update you often need to check the data to ensure it is valid.  RIA Services as clean, prescriptive pattern for handling this.   First lets look at what you get for free.  The value for any field entered has to be valid for the range of that data type.  For example, you never need to write code to ensure someone didnt type is forty-two into...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Silverlight 4 + RIA Services - Ready for Business: Validating Data

    To continue our series lets look at data validation our business applications. Updating data is great, but when you enable data update you often need to check the data to ensure it is valid.  RIA Services as clean, prescriptive pattern for handling this.   First lets look at what you get for free.  The value for any field entered has to be valid for the range of that data type.  For example, you never need to write code to ensure someone didnt type is forty-two into...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• RIA Services EntitySet does not support 'Edit' opperation

  - by Savvas Sopiadis

  Hello everbody! Making my first steps in RIA Services (VS2010Beta2) and i encountered this problem: created an EF Model (no POCOs), generic repository on top of it and a RIA Service(hosted in an ASP.NET MVC application) and tryed to get data from within the ASP.NET MVC application: worked well. Next step: Silverlight client. Got a reference to the RIAService (through its context), queried for all the records of the repository and got them into the SL application as well (using this code sample): private ObservableCollection<Culture> _cultures = new ObservableCollection<Culture>(); public ObservableCollection<Culture> cultures { get { return _cultures; } set { _cultures = value; RaisePropertyChanged("cultures"); } } .... //Get cultures EntityQuery<Culture> queryCultures = from cu in dsCtxt.GetAllCulturesQuery() select cu; loCultures = dsCtxt.Load(queryCultures); loCultures.Completed += new EventHandler(lo_Completed); .... void loAnyCulture_Completed(object sender, EventArgs e) { ObservableCollection<Culture> temp= new ObservableCollection<Culture>loAnyCulture.Entities); AnyCulture = temp[0]; } The problem is this: whenever i try to edit some data of a record (in this example the first record) i get this error: This EntitySet of type 'Culture' does not support the 'Edit' operation. I thought that i did something weird and tryed to create an object of type Culture and assign a value to it: it worked well! What am i missing? Do i have to declare an EntitySet? Do i have to mark it? Do i have to...what? Thanks in advance

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• What's the best way to transfer a large dataset over a .NET web service?

  - by Malvineous

  I've inherited a C# .NET application which talks to a web service, and the web service talks to an Oracle database. I need to add an export function to the UI, to produce an Excel spreadsheet of some of the data. I have created a web service function to run a database query, load the data into a DataTable and then return it, which works fine for a small number of rows. However there is enough data in the full run that the client application locks up for a few minutes and then returns a timeout error. Obviously this isn't the best way to retrieve such a large dataset. Before I go ahead and come up with some dodgy way of splitting the call, I'm wondering if there is already something in place that can handle this. At the moment I'm thinking of a startExport function then repeatedly calling a next50Rows function until there is no data left, but because web services are stateless this means I'm going to have to keep some sort of ID number around and deal with the associated permissions. It would mean that I don't have to load the entire data set into the web server's memory though, which is one good thing. So if anyone knows a better way to retrieve a large amount of data (in a table format) over a .NET web service, please let me know!

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• TreeGridView in VB.NET 3.5

  - by hgulyan

  Hi, I need a control like a TreeView, but with option to use multiple columns in a node. There's a controls called TreeListView on codeproject (link text), but it's doesn't have some features I need. 1) I need a key on every node or somehow bind an object to the control. 2) I need to change node image(like in file systems - folders and files) 3) I need a CheckBox on every node 4) I need path and level of a node. Does anyone know a windows control, that does all this? Thank you.

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• Mocking HttpContext in .NET MVC2 using Moq

  - by Richard

  Hi, This was working in MVC 1, but has broken in MVC 2. I'm mocking the HttpContext so I can test routes. The code was originally taken from Steven Sanderson's book. I've tried mocking some extra properties as suggested in this comment but it hasn't fixed it. What am I missing? This is the start of my test code. routeData is null when this code completes. // Arange RouteCollection routeConfig = new RouteCollection(); MvcApplication.RegisterRoutes(routeConfig); var mockHttpContext = makeMockHttpContext(url); // Act RouteData routeData = routeConfig.GetRouteData(mockHttpContext.Object); This method creates my mock HttpContext: private static Mock<HttpContextBase> makeMockHttpContext(String url) { var mockHttpContext = new Mock<System.Web.HttpContextBase>(); // Mock the request var mockRequest = new Mock<HttpRequestBase>(); mockHttpContext.Setup(t => t.Request).Returns(mockRequest.Object); mockRequest.Setup(t => t.AppRelativeCurrentExecutionFilePath).Returns(url); // Tried adding these to fix in MVC2 (didn't work) mockRequest.Setup(r => r.HttpMethod).Returns("GET"); mockRequest.Setup(r => r.Headers).Returns(new NameValueCollection()); mockRequest.Setup(r => r.Form).Returns(new NameValueCollection()); mockRequest.Setup(r => r.QueryString).Returns(new NameValueCollection()); mockRequest.Setup(r => r.Files).Returns(new Mock<HttpFileCollectionBase>().Object); // Mock the response var mockResponse = new Mock<HttpResponseBase>(); mockHttpContext.Setup(t => t.Response).Returns(mockResponse.Object); mockResponse.Setup(t => t.ApplyAppPathModifier(It.IsAny<String>())).Returns<String>(t => t); return mockHttpContext; }

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• Html.CheckBoxFor() checked problem in asp.net mvc 2

  - by loviji

  Hello, I met a problem with Html.CheckBoxFor() method. In my EditPage checkbox is not checked. <%= Html.CheckBoxFor(model => model.KRead.Value)%> How can I do checked ckeckbox element, if model.KRead.Value==true? thanks

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• How to safely use PayPal IPN with Asp.Net MVC

  - by Picflight

  Here are two sources for PayPal IPN: Kona.Web IPN DotNetNuke IPN DNN has a loop in the beginning of the Page_Load method that captures txn_type and txn_id, which I don't see in the Kona code. DNN also captures payer email and other information into local variables. I am trying to make sure that I incorporate some of the security checks that I see in DNN into my MVC IPN. How do I do what DNN is doing with MVC 2 with Kona as the base? Is the Kona.Web IPN safe for production, does it need some more tweaking?

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• ASP.NET MVC: shortcut for Response.Write and String.Format

  - by pcampbell

  I've found a pattern in my Views like this: <% if (someCondition) { Response.Write(string.Format("Hello {0}, Visitor {1} on {2}.", userName, someCounter, someDate)); } else { Response.Write(string.Format("Foo is {0}.", bar)); } %> The question here is around DRY and Response.Write(string.Format()). Are there better, or more concise ways to . Consider that HTML encoding would be a nice feature to include, perhaps as a boolean to a method call of some kind (extension method on Html?. Is there an obvious extension method that I'm missing? Do you have an extension method that you rely on to achieve this functionality?

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• ASP.NET MVC 2 disable cache for browser back button in partial views

  - by brainnovative

  I am using Html.RenderAction<CartController>(c => c.Show()); on my master Page to display the cart for all pages. The problem is when I add an item to the cart and then hit the browser back button. It shows the old cart (from Cache) until I hit the refresh button or navigate to another page. I've tried this and it works perfectly but it disables the Cache globally for the whole page an for all pages in my site (since this Action method is used on the master page). I need to enable cache for several other partial views (action methods) for performance reasons. I wouldn't like to use client side script with AJAX to refresh the cart (and login view) on page load - but that's the only solution I can think of right now. Does anyone know better?

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• How to get input value or javascript variable in Asp.Net MVC Ajax.ActionLink

  - by achu

  I want to pass an input control value (say textbox1.value or a javascript variable) to a controller action method (as a parameter) without a form post (using Ajax.ActionLink). please see the code below is it possible to assign like new {name = textbox1.value} in Ajax.ActionLink. View <input type="text" id="textbox1" /> <% =Ajax.ActionLink("mylink", "linkfunction", new {name = textbox1.value}, new AjaxOptions { UpdateTargetId = "result"})%> <span id="result"></span> and controler action is .. public string linkfunction(string name) { return DateTime.Now.ToString(); }

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• ASP.NET MVC Html.BeginRouteForm render's action with problem

  - by Sadegh

  hi, i defined this route: context.MapRoute("SearchEngineWebSearch", "{culture}/{style}/search/web/{query}/{index}/{size}", new { controller = "search", action = "web", query = "", index = 0, size = 5 }, new { index = new UInt32RouteConstraint(), size = new UInt32RouteConstraint() }); and form to post parameter to that: <% using (Html.BeginRouteForm("SearchEngineWebSearch", FormMethod.Post)) { %> <input name="query" type="text" value="<%: ViewData["Query"]%>" class="search-field" /> <input type="submit" value="Search" class="search-button" /> <%} %> but form rendered with problem. why? thanks in advance ;)

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• ASP.NET MVC: Render checkbox list from MultiSelectList

  - by aximili

  How do you associate a MultiSelectList with a list of checkboxes? eg. I pass something like this to the model model.Groups = new MultiSelectList(k.Groups, "Id", "Name", selectedGroups) How should I render it? This doesn't work <% foreach (var item in Model.Groups.Items) { %> <input type="checkbox" name="groups" value="<%=item.Value%>" id="group<%=item.Value%>" checked="<%=item.Selected?"yes":"no"%>" /> <label for="group<%=item.Value%>"><%=item.Text%></label> <% } %> Error CS1061: 'object' does not contain a definition for 'Value'... Is there a HTML Helper method that I can use? (Then, unless it is straightforward, how should I then get the selected values back on the Controller when the form is submitted?)

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• Html.CheckBoxFor() checked problem in ASP.Net MVC 2

  - by inolen

  It doesn't seem that the Html.CheckBoxFor helper adds the correct "checked" attribute when rendering the HTML. I have a bool property rendered like so: <%= Html.CheckBoxFor(m => m.Visible) %> And the outputted HTML is this: <input type="checkbox" value="true" name="Visible" id="Visible"> Is there some particular reason it does not add the "checked" attribute when the value is true?

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• Expire Output Cache ASP.Net MVC

  - by Max Fraser

  I am using the standared outputcache tag in my MVC app which works great but I need to force it to be dumped at certain times. How do I achieve this? The page that gets cached is built from a very simple route {Controller}/{PageName} - so most pages are something like this: /Pages/About-Us Here is the output cache tag that is at the top of my .aspx v iew page just to be clear: <@ OutputCache Duration="100" VaryByParam="None" %> So in another action on the same controller where content is updated I need to dump this cache, or even all of it - it's a very small app so not a big deal deal to dump all cached items.

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• Reporting Services 2010 RDLC: Passing Querystring Parameters from an RDLC

  - by Brian MacKay

  I'm trying to build a simple RDLC report that shows some data, and has a 'select' link that sends the browser off to a certain url with some data in the querystring (a key). In the vs2010 report designer, I can double-click on the column, then select action, and there are a bunch of thigns that seem like they might work. But none of them do. Under 'enable as a hyperlink' I can pick 'go to url' but there aren't any parameter options to pass. I also tried 'go to report' on the off chance that I could trick it into doing what I want. Here there are parameter options, but it knows that my url is not a report and the "select" link renders as text (not clickable). Any ideas? I'm pretty sure this used to work in vs2008, and it seems like something that must be doable. But I've been pulling out my hair for several hours on this one.

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• Broken RenderPartial After Upgrade To ASP.NET MVC2

  - by mxmissile

  I upgraded a MVC1 project to MVC2, now all my calls to RenderPartial are throwing System.ArgumentNullException: Value cannot be null. However this does works: <% Html.RenderPartial("~/Views/Shared/LogOnUserControl.ascx"); %> And this does not (works in MVC1): <% Html.RenderPartial("LogOnUserControl"); %> Did the behavior of RenderPartial change?

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• What is Microsoft.csharp.dll in .NET 4.0

  - by anon

  This dll is added by default in Visual Studio 2010 projects. What is this new project used for. It does not seem to contain much after looking at it using Reflector and Google does not seem to have much to say about it either.

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• ASP.NET MVC 3: RouteExistingFiles = true seems to have no effect

  - by Oleksandr Kaplun

  I'm trying to understand how RouteExistingFiles works. So I've created a new MVC 3 internet project (MVC 4 behaves the same way) and put a HTMLPage.html file to the Content folder of my project. Now I went to the Global.Asax file and edited the RegisterRoutes function so it looks like this: public static void RegisterRoutes(RouteCollection routes) { routes.RouteExistingFiles = true; //Look for routes before looking if a static file exists routes.MapRoute( "Default", // Route name "{controller}/{action}/{id}", // URL with parameters new {controller = "Home", action = "Index", id = UrlParameter.Optional} // Parameter defaults ); } Now it should give me an error when I'm requesting a localhost:XXXX/Content/HTMLPage.html since there's no "Content" controller and the request definitely hits the default pattern. But instead I'm seeing my HTMLPage. What am I doing wrong here? Update: I think I'll have to give up. Even if I'm adding a route like this one: routes.MapRoute("", "Content/{*anything}", new {controller = "Home", action = "Index"}); it still shows me the content of the HTMLPage. When I request a url like ~/Content/HTMLPage I'm getting the Index page as expected, but when I add a file extenstion like .html or .txt the content is shown (or a 404 error if the file does not exist). If anyone can check this in VS2012 please let me know what result you're getting. Thank you.

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• Fluent NHibernate Automapping with RIA services

  - by VexXtreme

  Hi guys I've encountered a slight problem recently, or rather a lack of understanding of how NHibernate automapping works with RIA data services. Namely, I don't understand how to use Association and Include attributes. For instance, I've created two tables in my database and corresponding classes (that NHibernate correctly fills). The problem is, RIA doesn't generate properties (collections) bound by foreign key to other tables, on the client side, although I've defined them in my classes in my domain model... it generates just properties that belong to their own class, on the client side. I assume that these attributes aren't necessary since NHibernate automapper is supposed to fill those collections on it's own... I'm quite confused as to how this works. And I don't understand why RIA simply skips properties such as public virtual IList<Medication> Medications{ get; set; } during autogeneration. Any input is appreciated Thanks

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