I've 2 servers mirror with a load balancer. I'd like to know the pros and cons of sticking with app cache versus going with something like memcache? I'm very interested in various solutions and especially the types of errors that I could get or limitations by not synchronizing them.
To start the discussion, I'd hazard that using ASP.NET cache would be faster and simpler.
I made a pretty cool ASP.NET MVC 3 application, and I want to send it as an attachment to a web firm. I tried playing around in visual web developer but could not get anything :( Should I just zip the project folder up and send it that way? Is there somewhere I can host it for free (doubtful).
View 2 RepliesA security review was done against one of our ASP.net applications and returned in the test results was a SQL Injection Exposures considered to be a high risk item. The test that was performed passed a SQL statement as the value of the __EVENTTARGET and the __EVENTARGUMENT. I am wondering since these 2 values are ASP.net auto-generated hidden fields used for the Auto-Postback feature of the framework and hold information specific to the controls initiating the postback, is there really the potential for SQL injection if you are never manually calling and or pulling values out of these parameters in your code behind?
View 2 RepliesI am playing with Asp.net MVC 3, I was wondering how do you acheive a collection rendering in the view when the collection is made of 'real world' objects. Let's say I have a collection of client, each client
may have an address and an adress may have a country.
When I write the following code it crashs if one of the client has a null address (or a null country). Object reference not set to an instance of an object.
[code]...
I am following this article [URL] ....
It's working fine except for zip file. When ever i am attaching zip file in mail, it is giving me error
"Exceeded storage allocation. The server response was: 5.7.0 This message was blocked because its content presents a potential"....
Is it correct to implement my caching object like this in my controller :
[code]....
And I Use it like this :
[code]....
I have two member roles at my project:
1.) Administrator
2.) Member
From the toolbox in Visual Studio 2008, I have dragged and dropped the create user wizard into the stage. I aim that a guest can register itself and automatically join the "member" role. Not the role "administrator". How can I do that?
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?
What are the "optimal" parameters for creating an AppFabric cache when you will be storing session state in the cache? MSDN Cache-Related Commands
Powershell command line:
New-Cache [-CacheName] <String> [-Eviction <String>] [-Expirable <String>] [-Force [<SwitchParameter>]] [-NotificationsEnabled <String>] [-Secondaries <Int32>] [-TimeToLive <Int64>]
[code]...
Since I don't want my sessions to be removed unless the session has been abandoned either via code or Session Timeout...For eviction, I would think "None" and for expireable, I would think False.I have tested and calling Session.Abandon does remove the object from the cache. I have also tested to see if by extending my session, the session object in cache is also extended. This does seem to work the "correct" way.
We have a data driven ASP.NET website which has been written using the standard pattern for data caching (adapted here from MSDN):
public DataTable GetData()
{
string key = "DataTable";
object item = Cache[key] as DataTable;
[code]...
The trouble with this is that the call to GetDataFromSQL() is expensive and the use of the site is fairly high. So every five minutes, when the cache drops, the site becomes very 'sticky' while a lot of requests are waiting for the new data to be retrieved.
What we really want to happen is for the old data to remain current while new data is periodically reloaded in the background. (The fact that someone might therefore see data that is six minutes old isn't a big issue - the data isn't that time sensitive). This is something that I can write myself, but it would be useful to know if any alternative caching engines (I know names like Velocity, memcache) support this kind of scenario. Or am I missing some obvious trick with the standard ASP.NET data cache?
We are using HttpRuntime.Cache API in an ASP.NET to cache data retrieved from a database.
For this particular application, our database queries feature a LOT of parameters, so our cache keys look something like this:
table=table1;param1=somevalue1;param2=somevalue2;param3=somevalue3;param4=somevalue4;param5=somevalue5;param6=somevalue6... etc...
we have so many parameters that the cache key is several hundred characters long. is there a limit to the length of these cache keys? Internally, it is using a dictionary, so theoretically the lookup time should be constant. However, I wonder if we have potential to run into some performance/memory problem.
I have use Nhibernate in my MVC Project by me known, Nhibernate have cache on Session and Object. now, I want use HttpContext.Current.Cache (system.web) for cache data something in project. my code same that have problem, haven't it. and that's right or wrong.
View 2 RepliesI'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?
I need to enable caching in my asp.net application, but I do not want to use the webserver's memory for holding cache objects. If I add the page directive for output caching will the page be stored in the asp.net cache object?
View 2 RepliesI want to be able to maintain certain objects between application restarts.
To do that, I want to write specific cached items out to disk in Global.asax Application_End() function and re-load them back on Application_Start().
I currently have a cache helper class, which uses the following method to return the cached value:
return HttpContext.Current.Cache[key];
Problem: during Application_End(), HttpContext.Current is null since there is no web request (it's an automated cleanup procedure) - therefore, I cannot access .Cache[] to retrieve any of the items to save to disk.
Question: how can I access the cache items during Application_End()?
Im building a image gallery which reads file from disk, create thumbnails on the fly and present them to the user. This works good, except the processing takes a bit time.
I then decided to cache the processed images using the ASP .NET Application Cache. When a image is processed I add the byte[] stream to the cache. As far as I know this is beeing saved into the system memory. And this is working perfect, the loading of the page is much faster.
My question is if there are thousands of images which gets cached in the Application Cache, will that affect the server performance in any way?
You know I have the way to Cache the data I've got from the SQL Server over data caching. In addition I can output cache web user controls.Whats about a web user control contains data from a SQL database? Does it make sense to cache the data and also cache the control?What is the best solution for the combination of these two components?
View 1 RepliesI have a server control that I developed which generates navigation based on a third party CMS API. Currently I am caching this control using the PartialCaching attribute. The CMS uses cache key dependencies to invalidate the cache when a user makes an edit, however in the case of my server control it does not get invalidated and the updated navigation will not show up until the cache expiration set by the PartialCaching attribute.Here is my two part question:
What is the proper way to programmatically cache a server control, without using the PartialCaching attribute, and adding a cache key dependency?
Is it possible to continue to use the PartialCaching attribute and add a cache key dependency?
I'm using the OutputCache for my pages, and I have a dynamic user control (login/register) . When the user try to sign in, the the control do not change the aspect because I´m using OutputCache. How can I exclude the "login/register" control from the cache?
View 6 RepliesI am trying to remove the cache using the HttpRuntime.Cache.Remove(key) but invain. I wonder what are the best practices for using HttpRuntime.Cache.
View 2 RepliesI have storedprcedure which returns userinformation.. this is my storedprocedure.. which returns student information.. I need to get this cache value in Actionresult method to get the student Id?
how to get the Cache value to the Actionresult method from StudentDB.cs file?
public StudentBE GetStudentInfo(int ID, string type)
{
try
{
var cache = CacheFactory.GetCacheManager();
[code]...
need to write Cache Methods in my asp.net mvc project.. I created one Class called CacheHelper.cs file.. Mainly In my appliction I am using three types GetData() ( getting data from cache)Add() ( Add data to the Cache) Refresh() ( Refresh data) or Flush()
View 4 RepliesI have ASP.Net application with a simple cache helper. Under VS web server it works fine. Under IIS 6.0 cache doesn't work- object, was saved previos, doesn't returns after a minute (with no exception).
[Code]....
How to use cache dependencies in MVC?So far, I follow the caching tutorial (http://weblogs.asp.net/rashid/archive/2008/03/28/asp-net-mvc-action-filter-caching-and-compression.aspx) but what if changes occured in the database and the page is still cached. [:(]
How to clear cached pages when new data is inserted?
I have MVC 2 site, and I.E is cacheing word documents linked on my site. I know there is a way to clear cache before every action in the controller. But for these links i am not using action, i am just creating regular href links.. Is there anyway i can clear the cache?
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