Advantages And Disadvantages Of Using Application Variables In Web Applications?

Jun 8, 2010

I haven't used the application variables in my asp.net web applications. Im using asp.net2.0. Is there any disadvantages of using applicationvariables.



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Architecture :: Advantages And Disadvantages Of Using Workflow In Web Applications?

Dec 3, 2009

I would like to know the advantages and disadvantages of using workflow within asp.net web applications. While I like the event driven model and the tracking features that it presents I am a little uncomfortable with its asynchronous nature and I have a very complex process to model. Please give me a sample application if possible.

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As far as I can tell, a way to navigate this issue, is to make the functions Public Shared (as opposed to just Public functions).

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2.IIS 5/6/7
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Choices

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what are advatanges and disadvantage to both.

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<asp:TextBox id="txtSomething" runat="server" text="<% #Bind ("FIELDNAME") %>" />

I think this approach is not very clean: 1) the data and presentation are not cleanly separated, and 2) the values for some controls must be evaluated, formatted and/or put through some complex business logic that I would rather place in the code behind than in the text attribute of the textbox (like text="<% #Eval (SomeFunction("FIELDNAME")) %>").I would rather call the dataset in the code behind and programmatically set the values of the controls there (and preferably all at once like in the Page_Load event). I can do this using a typed dataset or an untyped dataset. What are the pros and cons of typed versus untyped?

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Mar 4, 2009

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Persistent Variables - Assigning Cache - Session And Application Variables In One Program And Displaying In Another

Feb 17, 2009

I am assigning cache, session, and application variables in one program and displaying them in another. On one machine, they all persist for a while but then disappear. On another machine with Visual Studio 2008, the cache and application variables seem to persist but the session variable seems not to get assigned. I need the session vars for individual user information and the application variables to hold lots of table data for the users to share. How can I make this work ? I am reading about application_start etc. now.

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Entity Framework - Is Using Public Static Variables For Compiled Queries Bad In Applications?

Aug 19, 2010

I'm coding a business layer for an ASP.NET application. I've created database methods in my BLL as static. I've created public static Func variables to be compiled and used in several different methods, like this:

namespace BLL
public class User
{
public static Func<Context, variable, result> selectUser;
private static void CompileQuery()
{
if(selectUser == null)
{
selectUser = CompiledQuery.Compile......
}
}
public static UserClass Select(int id)
{
CompileQuery();
//uses selectUser
}
public static SomethingElse DoSomethingElse()
{
CompileQuery();
//also uses selectUser
}
}

It'll be used in ASP.NET layer like this: using BLL;

private void AddUser()
{
UserClass user = User.Select(id);
}

My question is, since static variables are not thread-safe, is this a bad design decision? I'm thinking of either implementing a locking mechanism, which makes me think if it'd slow down the application, or using instantiated class approach which makes me wonder if query compiling would be beneficial.

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State Management :: Sharing The Session Variables Between Two .net Applications Using SQL Server Mode?

Sep 18, 2010

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Nov 9, 2010

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Aug 16, 2010

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Keep in mind that its out of the question that we can shift the whole application to SL. We must have to stick to asp.net 3.5 or 4

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Jan 18, 2011

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Oct 27, 2010

I have one website over at utopiapimp.com. The website is used for a popular web based game. Some company internets don't allow the website to be accessed so I opened up another domain at utopiashrimp.com. Same website but a different iss application. Both have same database backends. They also both sit on the same virtual machine. I put my brand new code on shrimp and solve bugs with that code. I host the solid code on pimp. So I can't just forward the shrimp domain to pimp because I need a test bed.

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I have developed a new application in .net 2.0. I want to know two versions of .net applications run in one application server.

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Jan 26, 2011

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Aug 7, 2010

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Aug 30, 2010

to host two web applications in single application domain? For example two web applications web1 and web2 being hosted in single application domain.

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Jul 9, 2010

I have 2 different applications hosted on an IIS server. I have created a new application pool.Can i run both the applications on the same pool??Will sessions or other values of one application be available to the other application if I do it this way?

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Sep 3, 2010

I have a parent application and several child applications in .NET 3.5. The parent application is a CMS custom app that needs to be isoalted from the child apps. THe URLs that we use to access the apps are:

[URL]

The root application on http://myserver is the cms application that needs to be isolated entirely from the other applications. Is this possible in ASP.NET and how do I go about doing it? Right now when I run sub_app1, I get a DLL binding error for a DLL that is only used in the root application.

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Application Variables Work The Same In Both ASP And ASP.NET

May 16, 2010

This question actually refers to a classic ASP page I'm working on, but I'm assuming that app variables work the same in both ASP and ASP.NET Let's say we have a bunch of websites, owned by different people. The sites are all different, but the common theme is they are car enthusiast websites. Each of these websites has their own unique index page (of course), but also "common" pages, which are pages shared by all the websites.

One of the common pages, checks for the value of an application variable, which may or may not exist. For example, lets call this page luxurycars.asp, which is a simple page that shows the top 10 luxury cars of this year. This common luxury car page will pull and use the app variable like so:

[CODE]
Dim SiteOwner
SiteOwner = Application("OwnerName")
Response.Write("This site is managed by " & SiteOwner)
[/CODE]

This app variable is set uniquely in each clients index.asp page like so:

[CODE]
Application("OwnerName") = "John Doe"
[/CODE]

Will this work? I just started learning classic ASP (for my job), and I'm reading that application variables are universal and only one copy of the variable will exist. So does this mean if John Doe sets Application("OwnerName") to "John Doe" in HIS index.asp page, will everyone that visits the common luxury car page see John Doe's name? Regardless of whether they got to that page via John Doe's page or someone elses? And if so would using a Session variable instead solve this problem? Sorry if this sounds confusing, let me know if I need to re-word it or give more detail...

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Modifying Application Variables In (MVC)?

Mar 15, 2011

I store a large structure holding my application's reference data in a variable I access through HttpContext.Application. Every once in a while this data needs to change. When I update it in place, is there a danger that incoming requests will see the data in an inconsistent state? Is there a need (and a way) to lock some or all of this structure? Finally, are there other approaches to this problem other than querying the database every time you need this (mostly static) data?

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Cache And Application Variables Disappearing

Mar 4, 2009

I have problems with cache and application variables disappearing. To get around the problem, I am trying to recreate them when they disappear by checking a var called cache("redo") when any page loads. If cache("redo") is missing , then I server.execute("redo.aspx"). When redo.aspx loads, it queries static tables, assigns them to application variables, and sets cache("redo") back to a value. I don't know if this is a bad way to deal with the disappearing problem and am worried about 2 or more users encountering disappeared vars and running redo at the same time.

1. Does that seem like a good way to handle the disappearing problem ?
2. What happens when 2 or more users run redo.aspx at the same time ?

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Web Forms :: Static Variables Throughout Application

Oct 6, 2010

i am developing a website in asp.net i have created a class "Utility" in App_Code Folder this class contains a static object of another class(LoginInfo) as described below:

[Code]....

This LoginInfo Class is my business object which only contains 2 properties UserID and UserName
Now what i am doing on my login page, after user authentication i am setting these properties with current logged in UserId and UserName

[Code]....

I am using this CurrentUser object on my webpage to get userid and username. It works fine, but after few minutes my CurrentUser.UserID and CurrentUser.UserName is set to blank string. I am not able to figure out what is the problem. may be due to asp.net recycles.

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May 6, 2009

I am using asp.net 2.0 Visual Studio 2008 and .net framework 2.0 and IE 6

I seem to lose the session variables in my application. I am using Forms Authentication

Application starts with Start.aspx then use redirectFromLoginPage to redirect to index.aspx, which contains a disclaimer statement.From index.aspx I then redirect to Default.aspx using Response.Redirect("~/default.aspx", false)

In Default.aspx.cs in OnPreInit, I check for (!Page.IsPostBack) and assign a session variable "VAR1".

I want to use this variable later on for one functionality in the application. When I deploy in IIS, this functionality works fine the first time, but fails in subsequent times. It comes up with Object Reference Not set (as Session variable "VAR1" does not exist"). Also sometimes, when I refresh the Default.aspx page in the browser, it comes up with same error message.

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Feb 24, 2010

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Nov 23, 2009

I have a master page that contains some login texboxes. In the code-behind file I check to see if it is a valid login. If a user has logged in, I set a boolean variable to "true" else "false". I've defined the boolean variable in the master page code-behind file as "Public" and set it to "false".

My problem is, after a user has logged in successfully, the variable is set to true but when I run the code thru the debugger and it hits another control event, the value is still "false". Where should I define my application variables at? I tried to add a .bas module but obviously web apps don't offer that...at least I didn't see anything like that.

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Jun 9, 2010

I set up various global parameters in Global.asax, as such:

Application["PagePolicies"] = "~/Lab/Policies.aspx";
Application["PageShare"] = "/Share.aspx";
Application["FileSearchQueries"] = Server.MapPath("~/Resources/SearchQueries.xml");

I have no problem accessing these variables form .ascx.cs or .aspx.cs file -- ie. files that are part of the Web content. However, I can't seem to access 'Application' from basic class objects (ie. standalone .cs files). I read somewhere to use a slight variations in .cs files, as follows, but it always comes throws an exception when in use:

String file = (String)System.Web.HttpContext.Current.Application["FileSearchQueries"];

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Preserve Session Variables In Web Application After Build?

Nov 15, 2010

Every time I build my web application, my session variables are lost from before the build. Is there anyway to preserve session variables during the build?

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Feb 8, 2010

What is the recommended or usual way an ASP.net web application(in C# language) can store/access values that are needed accross the various pages in a website. For example a basic company website might need the company's name and other related information available to multiple pages. Where do I declare these variables/values and how do I access them. Coming from c++ application programming I would usually store such data in a Singleton class object.

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Dec 15, 2010

I know I can allow the web service access to Session variables by adding (EnableSession=true). Is there a way to allow it access to global Application variables?

I have several resource intensive variables that are loaded in the Global.asax and I need access to there in the webservice.

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Jun 7, 2010

I've been worked with web services so far, and I'm interested in expanding my services to console applications as well so I started digging up with WCF but I'm conserned that I won't be able to use the HttpContext collection that I've been used to do with web services one important thing which is to generate a random value from HttpContext.Current.Request.ServerVariables["ALL_HTTP"] that I need to reckon if it's the same or at least near what machine that is calling my service. How can I overcome this problem?

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