asp.net-mvc-2

I'm looking at an example of a save method in a Products repository from Steven Sanderson's book, Pro ASP.NET MVC 2 Framework: public void SaveProduct(Product product) { // if new product, attach to DataContext: if (product.ProductID == 0) productsTable.InsertOnSubmit(product); else if (productsTable.GetOriginalEntityState(product) == null) { // we're updating existing product productsTable.Attach(product); productsTable.Context.Refresh(RefreshMode.KeepCurrentValues, product); } productsTable.Context.SubmitChanges(); } I do not understand the logic in the else if line: else if (productsTable

I'm new to .NET and while starting to learn ASP .NET MVC2 framework I see that you can create a .mdf file inside the App_Data folder and connect to it or you can connect to a SQL Server. What is the difference between these to methods of interacting with a database? What are the advantages/disadvantages of one over the other? The "MDF in the App_Data" folder works for web site and web apps, and it works only with SQL Server Express (2005, 2008, 2008 R2). This is the version that's typically installed along with Visual Studio, and which works fine as a dev environment. SQL Server Express has a

I have a small MVC2 app that displays in two cultures: en-US and es-MX. One portion contains a user input for a date that is pre-populated with the current date in the Model. When using en-US, the date field is displayed as MM/dd/yyyy and can be changed using the same format without causing any validation errors. When using es-MX, the date field is displayed as dd/MM/yyyy, but when the date is edited in this format, the server-side validation fails with the message: The value '17/05/1991' is not valid for The Date. One of the first things that jumps out at me about that message is that it is

Hello I am generating an excel file inside my action that I would return to the user. How do I have to declare the action to return a file? May I call this action with ajax? thanks! Retired_User Option 1: Use built in ActionResults, such as FilePathResult, FileStreamResult, FileContentResult Option 2: Build a custom ActionResult to return your excel file (example: http://www.dotnetcurry.com/ShowArticle.aspx?ID=484&AspxAutoDetectCookieSupport=1 ) 来源： https://stackoverflow.com/questions/3935225/asp-net-mvc-how-to-make-an-action-that-return-a-file

I'm recieving the following error message, A public action method 'RenderMenu' was not found on controller 'Web.Controllers.SiteController'. However this action DOES exist and the controller does exist (As it work everywhere on the site) I looked at the inner exception. Execution of the child request failed. Please examine the InnerException for more information. (This is the inner exception...) Stack Trace at System.Web.Mvc.HttpHandlerUtil.ServerExecuteHttpHandlerWrapper.Wrap[TResult](Func`1 func) at System.Web.HttpServerUtility.ExecuteInternal(IHttpHandler handler, TextWriter writer, Boolean

I have a large web application that I have set up as both ASP.Net Web Forms and MVC. Some of the newer pages are MVC (.mvc) and some are Web Forms (.aspx). Since this is a business app and functions are being constantly added, it's hard for me to have the time to stop and replace existing functionality to convert it over. So I would like to do it piece by piece, control by control. To do this, all I would need to be able to do is to replace certain controls with <% Html.RenderPartial() %> or <% Html.HelperMethod %> Is it possible to include namespaces or inherit the page from something to

I have Forms authentication and I need a custom object to be stored in HttpContext.Current.User and in Thread.CurrentPrincipal. To get this, I listen to PostAuthenticateRequest event, then read from the DB all the user data I need to be stored in HttpContext.Current.User and in Thread.CurrentPrincipal, then I instantiate custom IPrincipal and IIdentity objects and assign them to the above locations. The problem is that for some reason PostAuthenticateRequest fires several times for a single request.. This causes unnecessary DB roundtrips that hurt performance.. How should I address this? (ASP