Architecture :: Keeping Information In Memory That Any User Can Access Easily?
Mar 20, 2010
I want to read some information from an xml file and store it ready in memory so that it can go out with every page response without being reloaded from the xml on every request.
What is the best way of doing this?
It looks to me like there are 2 options. Either create a class with static fields that the information is stored in. Or create a class with public fields that the info is stored in and create an instance of that class at application level.
Is that correct, are both of those options viable? or will I not be able to access the fields in the second method without creating an instance of the class in the code that responds to the page request(basically if you create an instance of a class at application level can you use that instance from within code anywhere in your website as long as it is public)?
The Register action gets called in the Account controller, showing the RegisterViewModel in the Register.aspx view. The form in Register.aspx is submitted/posted with answers to all of the form questions, except for the security question answers. If the user is created successfully, then I'd like to go to the GoToSecurityQuestions view using the code - return RedirectToAction("GoToSecurityQuestions", "Account"); I need to be able to keep track of the user name or ID of the newly created user so that I can persist the security questions to the database records related to the user. What's the best way to keep track of the user info between the [HttpPost] Register( ) and the [HttpGet] GoToSecurityQuestions( ) ?
[HttpGet] public ViewResult Register() { return View(new RegisterViewModel()); }
I've many wifi access point that are giving me connection inside an intranet, every access point is located in a wanted position of course, and my big problem is to know to which access point i'm connected trough a web page!Let me say access point named "A", and access point named "B", i must retrieve, with a web page, to which access point the client is connected because in that way i'll get the right position of my mobile
I have read that the best way to secure images from being access would be to place them into a database rather than into a file system or virtual directory. Is this correct? I am creating a site that needs to have the images the user upload be secure as possible. I initially programmed the images to be uploaded to a database then I reprogram the site to have them store in to a file system/virtual directory. I'm still up in the air in terms of which one to use. Again, security is my primary concern.
I work with a ASP.NET UI framework that pulls fields for a particular screen off a database. These fields can be associated with particular data fields in another database for binding. The idea with this setup is that if a client needs a new column on a table, they can easily add it, and create a UI field that binds to it without any sort of application restart or recompile.
The problem I've always had with this is that it has meant I'm always having to work with untyped datasets in my code. Are there any ORM libraries for .NET out there that could easily accommodate the requirement of being able to access arbitrary columns in the table schema over and above ones mapped to strongly typed fields?
I am currently developing a solution in which the user logs in once and can work on multiple customers at the same time on my site.I've looked at all possible solutions involving sessionid having stored the customerid, to launching a new browser session so i could have multiple sessions for one users etc. I also looked at using cookieless sessions.But the all fail because it's not a simple solution and in my opinion a simple solution is most of the time a good and predictable solution.
Therefore i came up with the idea to use url rewriting(i've seen this used in other applications). When the user opens a customer, i would like to start his url as follows "~/Customers/xxxxxxx/*.aspx" where xxxxxx represents the customerid. and *.aspx represents a complete subset of pages of my site. This would allow me to use a simple technique to use multiple user sessions within a single asp.net session.
Now coming to my problem, I have never done some url rewriting, therefore my questions:
- Is this possible.
- Can i protect all the pages that need a customerid as input(come to think of it, if no customerid in the querystring, redirect to a selection screen would be sufficient).
- How do i adopt all urls used in a sitemap etc in a structured way.
What are the typical hardware (including memory) for a standard ASP.NET application. I know it depends on the complexity of the application, but I am referring to a simple travel engine / booking application where most of the users are expected to just browse and a few will make reservations only. Initially we are not expecting a high number of hits on this also.
Is there a way to get load information on Application Server? How much memory or CPU is being used at a given point? I want to either 1. Limit users to use specific functionality of ASP.NET 3.5 application or 2. Deny users from accessing the application saying "Server is busy at the moment"
I have an access DB created in 2007 and saved in 2003 (.mdb). The tables contain links to a file server on my internal network. I'm trying to import the db into Expression Web 4 and keep the links intact. Currently, I can get the import to work, but the links get stripped out and displayed as plain text.
I am trying to develop a chess application in asp.net (C#). I am very confused about overall structure of the application. I am just unable to figure out the complete model (or prototype) of my project. As chess programming should be very efficient in memory consumption and speed, can someone provide me a good idea , how should I develop my application. Currently, I am taking a class named 'Chessboard' for my project and its objects are chesspieces ( pawn,king,queeen). I am initialising each object with some properties (type, value, color etc). But its quite complex. I am having 32 objects in this approach.
I've got a web application that runs of a state server. It looks like soon it may need to distributed and there will be two web servers behind a load balancer.
This works great for session state but my next challenge is Cache
My application leverages heavily of cache. I understand ASP.Net 4.0 will be offering more here but nothing much has been said about the how too.
There are two challenges that I face
1). Each webserver will have its own copy of cache whereas it would be more efficient to put this to a third server the same as session state is put to state server.
2). The real challenge is keeping cache in sync if a simple dataset derived from the database is changed my code dumps that cache item and reloads the cache. That's all well on one webserver but webserver number two wont know to drop that particular cache item and reload it. This could cause some unexpected problems in the application.
For scenario number 2 I could attempt to do some smart coding so server number two knows to dump the cache and reload it.
My guess is someone else has already been here before and there's probably a better implementation approach rather than writing extra code.
Does anyone know how I could achieve the goal of keeping Cache in sync between multiple webservers or even better farm Cache management to another server?
Setting the .Net trust level to Medium on a site will ensure that no code can access files outside the application directory.
I have an ASP.Net site that must run in Full Trust. I have configured my website in IIS to use its own Application Pool Identity [URL].
Currently it is possible for scripts/code in this app to read files outside of the application directory. This occurs because by default, accounts that are a member of the BUILTINusers group are able to read most files on the system, including c: and c:windows. It appears that Applicaion Pool Identity accounts are also members of BUILTINusers.
Is it possible to prevent file access outside the website folder while keeping Full Trust?
I'm working on building a Web Forms app to process an online application that users enter in. This application takes one set of person info (name, address, etc..) and then can take X number of several other sets of information. I have the database design set up to handle the information (and all the keys/relationships). Where I'm having a problem is deciding the best way to handle taking the information on the web form.
Currently I'm thinking to build each set of information into its own user control and then trying to dynamically add an instance of the user control onto the page as needed to take each set of information. For instance, if one person has 3 personal references, they could have a button to keep adding reference controls until they put in all the information. So you'd start with 0 controls, click add to have 1, click to add a second, etc. I've read a lot of posts about issues regenerating the control, or problems with static variables when multiple people are using the same form and control counts being off. Am I taking the right approach to this project or is there an easier way I'm not aware of?
We are in the midst of developing WEB application using .NET. so, i would like to know the Best practises for ASP.NET development, SQL server db, IIS security and network security as well. Where to get the information? I googled for it, but i cannot get the complete set and the info was updated 7 years ago. [URL]
With Visual Studio 2010, .NET Framework v4, Visual Basic.
Suppose you want to create some DLL. It will have many classes and methods. There is some information which will be used by many methods. I would like to hand over the information to the DLL once, and the DLL should store it in some place where any method can access it.
The DLL will be used both from within an EXE and from within an ASP.NET application.
I used Ajax collapsible extenders (1 to 9) with formviews in each of them on a web form.
They are all collapsed by default. If the user enters data in collapsible 5 formview and submits data, the page refreshes back to the top of the page (where the collapsible 1 is positioned). I would like the focus to stay in the region the user is working (even after insert/submit operations). How can I do this.
We have a wfc layer that wraps the business classes and database access and use a client that lives on the database layer. Amongst our group we are attempting to form standards. Some want to have the client call the web method and pass the page they are requesting and the page size. Pass that to the database and then page in SQL Server use RowNum.Some want to cache the full list of objects in http cache on the service tier and page in memory. They concern here is memory use on the server.
Which would be best for a medium number of users with potentially large number of records to manage (say 30K) Is it better to cache them all in memory and work from there or page at the database as the application scales?
I'm trying to access global shared memory from an ASP.NET web method while impersonating a client, but I get access denied when trying to open the handle. As an example:
[WebMethod] public string Testing() { string result = null; using (var ctx = WindowsIdentity.Impersonate(IntPtr.Zero)) [code]...
I am starting a new project in ASP.NET (With silverlight) - I would like to get expert opinion about how to design the data access.I can use DataAccess Layer with SQL helper, but the challenge is every new field that I add needs to be added in the sql helper.I am trying to see if there is a way to design the system, so that it appears in the front end when a new field is added. I don't want to have in the ASPX files (binding in controls) I want to have ability to change items in code. Essentially I am trying to see the best option to have a database application.
I am working on a ASP.NET 2.0 application. I get the following exception sometimes when i access the web application. I believe it is related to the server where the application is hosted? Exception of type 'System.OutOfMemoryException' was thrown. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown. Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace:
I have the membership provider and the create user with tow steps, one of the steps contains a custom registration form, for each created user data will be in the database, and there is an account page shows the data that the new created user did insert during the registration process on the custom registration page,
the problem, when the user is created and logged into his account page, this account page shows only the information for the first created user, not the info on the logged in user , but the logged in user data still saved in database and not showing on his account page?
I am building an asp.net application, using II6 on windows server 2003 (vps hosting).
I am confronted with an error I didn't receive on my development machine (windows 7, iis 7.5, 64 bit).
When my wcf service tries launching my query running against a local sql server this is the error I receive:
Memory gates checking failed because the free memory (43732992 bytes) is less than 5% of total memory. As a result, the service will not be available for incoming requests. To resolve this, either reduce the load on the machine or adjust the value of minFreeMemoryPercentageToActivateService on the serviceHostingEnvironment config element.
I have both VS 2005 and 2008 installed on my machine. 2005 is fine. For 2008, literally any asp.net project I try to create gets this eror. I try stepping into the code, and the error occurs apparently before anything that I can trap is loaded. There is no information written to the event log. I have tried this with a "Hello World" webpage with nothing else going on. Seems unique to my Windows Server 2003 machine.
