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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Jan 26, 2011
I cant figure out how to use the Application["myvar"] variable to store data for the application in asp.net 4.0 web app using c#. It say Application is not a known object and I can't for the life of me figure what to do a "using" on to expose it. I am in a static class at the time I cant use it. It seems to work in other units?
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Aug 7, 2010
How do I store a variable or object application wide in ASP.net MVC. In regular ASP, you had the Application object, and in ASP.net too apparently.
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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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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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Feb 24, 2010
im new to asp.net. . . im doing my final year project.How to use session variables in application using VC# and I also need to check with data base?
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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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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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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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Feb 19, 2010
I'm developing a server control and I'd like to set some cache and application level variables but I don't want them to be visible from outside the control. Is this possible?
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Oct 26, 2010
If I have a 2 control load events and one page load event subs and the control1_Load events fires first, can I lookup some database things and persist them? I would like to use the persisted data in the other two events when they fire. Normally I've been using session variables , is there a better way?
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Sep 1, 2010
In an ASP.NET web app written in VB.NET, I need to load and store a large read-only hash table that is frequently accessed by the application. It only needs to be loaded once on application start, is never updated and can be accessed by any session at any time.
If I load the hash table into a private member in a (global) module, a lookup to it takes one 20th of the time compared to storing the hash table in the Application or Cache object. Is there any reason why I should not do this, or should Application or Cache always be used to store in-memory objects in an ASP.NET web application?
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Aug 8, 2010
i am trying to collect 2 variables from one hyperlink, and use those variables in the page_load to set as session. but i don't know how to collect those 2 variables
such :
<a href="javascript:;" onclick="wsChangeColor('mainData', '#FF0000','#FFE4E1');return false;" title="Change color" id="red">1</a>
i would like to collect '#FF0000','#FFE4E1' or direct set '#FF0000','#FFE4E1' to string then send to pageload, how can i do this by only clicking on it ?
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Jan 2, 2010
I have this code in javascript: var x = e.mapX; It gets the X-coordinate of a map. What I want to do is that I want to store this into a c# variable. I have a class named Test with an integer property X. I want to store var x into X. In the codebehind, I have this on the Page_Load: Test test = new Test(); Then I am trying this on the javascript code: var x = e.mapX;
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Mar 5, 2011
whats the exact use of static variables in overall programming in .net and for asp.net...
Recently i went for the interview where interviewer asked me 2 question which i was not sure for the same..
whats the use of session object, i said sessions are the server side object, they are used when you want to store user specific data at server side, then he asked what if i want to use static variables for the same, i was mum, can anyone tell me how asp.net will behave if i store the user specific information in static variables.If i use cookies which are the best option to store the data at client side (not sensitive one), but what if user has disabled cookies on his machine, will my application would crash.
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Jan 19, 2010
i m using a regex to not allow certain characters, the below code works fine for certain html tags but not for all for i dont want the user to enter html tags for eg if i enter <nitin/> it allows but i dont want this to happen for other html tags it does not allow
!@#$%^&*()+=[]\';,/{}|":<>? or
!@#$%^&*()+=[]\';,/{}|":<>/>?
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Mar 1, 2011
I have a DataView resulted from a query as below
Title
Return Type
The Inception
1
NFS
2
Tron Legacy
1
Documentary
3
Roadrash
2
I want to pass this object to a method which modifies it using linq query to return the Dataview object as below(without using loops anywhere in the code)
Title
Return Type
The Inception
Movie
NFS
Game
Tron Legacy
Movie
Documentary
Others
Roadrash
Game
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Feb 24, 2011
I am using a regex to detect forum tags within posts, such as "[quote]text[/quote]" and then replace them with HTML formatting. I posted a question Forum tags. What is the best way to implement them? about a problem with nested tags.
I need this regex modified
string regex = @"[([^=]+)[=x22']*(S*?)['x22]*](.+?)[/(1)]";
Right now this matches an opening and closing tag, with match groups for the tag name, the tag content, and an optional value like the value after the equals in this forum tag [url=www.google.com]click me[/url].
What I need is for the expression to match the opening tag OR the closing tag and have a match group containing the tag name (including the '/' for the closing tag). I then want to iterate through them sort of like this:
Dictionary<string, int> tagCollection = new Dictionary<string, int>();
inputString = Regex.Replace(inputString, @"expression I'm asking for here",
match =>
{
[Code]....
So now, each tag is appended with a number and I could use the original regex to perform the tag functions and properly handle nested tags as separate tags.
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Nov 19, 2010
I am creating a Quartz.NET application in C#, and creating a bunch of administration webpages (C#/ASP.NET) so users can easily create jobs, set datamap fields and edit datamap fields.
I'm having some trouble editting jobs data maps though - any changes I make aren't saved at all. Is there anything I need to call after modifying the jobs data map?
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Nov 16, 2010
When I have multiple entries with the same id in a list box the selected index is always the first instance of the item. How do I get around this without modifying the id of the items in my list box so they are unique?
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Jun 12, 2010
what I can replace the bold line with to get it working with EventArgs e? I copied this code from a button function with CommandEventArgs e.
protected void btnNextStep_Click(object sender, EventArgs e)
{
if (cboxShippingSelect.Checked == true)
[Code]....
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Jan 30, 2011
I would like to store some meta-information about a given site instance that can (a) be managed by that site instance and (b) persist clobbering of Web.config file.The site will run in multiple environments (dev,testing,staging and production) and each environment can have different values for this metadata.
Note: All environments are running IIS 7.0+
The Root Web.config seems very appealing, as it is certainly outside of the website. Therefore, both files and databases can be changed while maintaining the metadata. I have seen how to modify the appSettings of the Web.config stored in the website, but is it possible to similarly modify the appSettings in the Root Web.config (Specifically within the proper directive)?
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Oct 22, 2010
I have a Quartz.NET application where I need the administrators to be able to modify the job details - mostly information in each jobs datamap, but also things like the triggers - here is my code I'm using
protected void ButtonSubmit_Click(object sender, EventArgs e)
{
JobDetail jobDetail = sched.GetJobDetail(hdnID.Value, hdnGroupID.Value);
jobDetail.JobDataMap["idname"] = txtName.Text;
jobDetail.JobDataMap["initialPath"] = TextBox1.Text;
jobDetail.JobDataMap["targetPath"] = TextBox2.Text;
[code]...
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