State Management :: Common Site And Database Structure?
Aug 2, 2010
I´m about to program a common application/website scenario. It contains pages which are presented to users, and some business logic behind, with a database connection class.
My questions are:
Q1: Should the database class be singleton? If so, why? Because does it even matter when every single user is in their own process on the server, and therefore each user has their "own" singleton database instance?
Q2: How would you normally direct users around the site? Would the Default.aspx page create instances of the required classes? And when the user is directed to a new page, how would you normally refer to these instances?
Q3: What kind of general information do you save in the Session variable? Is it a big no-no to save class instances?
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May 15, 2010
I have a public property that I use to store a GUID in the viewState:
Property myGUID()
As
Guid
Get
Return
CType(Me.ViewState("myGUID"),
Guid)
End
Get
Set(ByVal
value As
Guid)
Me.ViewState("myGUID")
= value
End
Set
End
Property
I include this code on many pages in my website...is there any way to migrate this to a common code file, so I don't have to repeat it on each page? If I try to add it to a class file, the "Me" part of course is out of scope.
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Feb 14, 2011
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public struct Point
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public float long;
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[Code]....
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Sep 27, 2010
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Jul 28, 2010
I have 2 sites, one the main product site the other a secure site featuring the basket and checkout processes.
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However I am having trouble getting the secure site to use the same cookie. When I redirect the users to the secure site, the basket appears empty. I need to go back to the main site and then back to secure before the cookie appears.
Here is the code for the cookie
[Code]....
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[Code]....
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Mar 12, 2011
Is it possible to cache a hole site?ll its pages, images, js, db data etc...If so is it go/bad idea?
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Jul 28, 2010
I have a site that I am trying to extend how long a session stays open even though the user is inactive. I have this set in my web.config
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Dec 21, 2010
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Apr 5, 2010
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Mar 28, 2011
I have upgraded our system from .NET 1.1 to .NET 4.0. I also had to update the ASP Session State database to version 2 by running the following command in the command window.
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Jan 29, 2011
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Jul 14, 2010
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Object reference not set to an instance of an object.
It failed on this line:
string userURL = Request.UrlReferrer.ToString();
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Feb 2, 2010
I am having a little difficulty trying to wrap my head around site structures. I have quite a large asp.net site, for which: Admins can see a user list, Each user can have many accounts, and for each account can have many items. I can picture this as a breadcrumb trail of editing a particular item. User List > Mr Bob > Accounts > BOB77 > Items > Item32 > Edit
User List = All the users Mr Bob = A user the administrator has selected from the User List Accounts = A list of the user's accounts 12BOB = The administrator has selected the account named 12BOB Items = A list of the items an account contains Item32 = The item that the administrator selected Edit = The action that the administrator wants to do. I can picture how this would look like if it was using ASP.NET MVC with the URL, but I am unsure how to map this out using Webforms, and in the physical filesystem.
This is what I have thought up about how I am guessing the physical structure would look like. Will this have to use session variables to achieve what I am trying to do?
/Users/User/Edit.aspx <- for editing a user
/Users/User/View.aspx <- for viewing a user
/Users/User/Accounts/Default.aspx <- for viewing all accounts
/Users/User/Accounts/Account/View.aspx <- for viewing an account
/Users/User/Accounts/Account/Edit.aspx <- for editing an account
/Users/User/Accounts/Account/Items/Default.aspx <- for viewing all items in an account
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Where can I read more about this kind of setup in a web application? Or, can someone point me in the direction of an available project that has this kind of layout?
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Jun 17, 2010
I am wondering if it is possible to clear a session variable if the user navigates away from my site.
My example is I have a session storing the logged in user. This is checked for user access to each page.
If the user goes to another site (e.g. google) I want them to relog into the site.
This is to prevent others getting access to a users account if they use the same pc minutes.
I do have a logout that performs this and I know that it is impossible to make users use it! :)
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Apr 2, 2010
l am facing a problem with session.
If many users access the site, the session gets crashed and data which i store to access across pages is getting lost.
a best way to store data (as session does) so that i can use the data across my web application.
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Oct 1, 2010
I have 2 sites, one the main product site the other a secure site featuring the basket and checkout processes.
When a user clicks "add item to basket" I am creating a basket in a database and then adding the items to the basket. The theory was then to store the id from the database for the basket (the basketid) in a cookie, redirect the user to secure site, use the basket id from the cookie and display the contents in the basket.
However I am having trouble getting the secure site to use the same cookie. When I redirect the users to the secure site, the basket appears empty. I need to go back to the main site and then back to secure before the cookie appears.
Here is the code for the cookie
[Code]....
And then on the secure site this is how it gets the basket ID from the cookie
[Code]....
But like I say it's having problems. I've tried replacing the cookies with session variables as well but it didn't work.
View 6 Replies
Dec 7, 2010
I have a application where login details are in 1 database and user details are in another database.Different cities have different database with common login database.As soon as user logs in i save the connection string name of its associated city database in a Session to access through out the application.Was wondering if this is the best possible way to do this? Will this cause a problem in Web Farms? Please let me know what is the best possible way to save a value which can be accessed through out the website and till what time is the value valid or expires?
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Sep 21, 2010
i am building an N-tier application now i want to store Data(like XmlNode) that is common to all users ..
now i thought using Application to hold the data but my data lays in the BLL tier which is an Class Library project and i can't store any datain there for example :
HttpApplication MyApp=new HttpApplication();
MyApp.Application["Data"]=XmlNode;
My question is what is the best way to store Data (not small data like user name etc..) is it Application? orCache?
i would like a small example within a ClassLibrary project
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Nov 21, 2010
I have a webpage which updates user information onto to the database, whenever they click the save buttonsince am using session variables in my page, data in the session variables is getting lost after 20mins if the session is idle, in order to keep the session alive am using the refresh option for every 5mins, after that the session variables are not lostNow my problem is whenever the page refreshes the user is losing all the data which is not saved, by means while the user is working on the page during the refresh all the textbox values are lostAny one has any solution for this? , can we extend the session variable timeout ?i tried this changed the session timeout to 60min in web.config as well, but still the session variable values are not persisting
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May 18, 2010
i want to use caching in my application
bcz i am depending on same data and in diffrent places i am communicating with database for this data
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Sep 17, 2010
I want to update the User LoggedIn Status to 'False', when the system shut down by light problem, or when the user click the 'Browser Close Button'
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Dec 11, 2010
Currently i have created Anonymous Profiles, i am not knowing whether the data will be saved in SQL database or Cookies, as i do not want to grow the database for Anonymous Profiles ? But in future i may migrate the Anonymous Profiles to Authenticated ProfilesBelow are the clarifications i need related to Profiles1) Do data of Authenticated Profiles saved in SQL database ?
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Dec 20, 2010
Suppose there are three button and every butthon has a click event function.
Clicking the first button displays something on this page with a gridview taking data from databases.
After clicking the first button i stored the value in a variable.
But when i click the second or third button i get null value for that variable.
Clicking the second or third button the page reloads and the value of that variable becomes null.
How can i store the value to that variable permanently?
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Sep 24, 2010
I have overridden the following methods:
LoadPageStateFromPersistenceMedium()
SavePageStateToPersistenceMedium(object viewState)
in a class that my page derives from, so that the viewstate can be stored in DB.
Now, on page_load of my page, I am checking what control caused a postback & based on that I am forcing execution of 2 button click events in a row (by overloading those click events & calling them explicitely), but the behaviour I want is as if the execution of those 2 button click events went through the regular page life cycle.
Here is the sequence of events that happen in typical page life cycle & notice I want to alter behaviour at step 4 (on load):
1) Initialization
2) LoadViewStateData (here the viewstate is loaded from my database using the overridden LoadPageStateFromPersistenceMedium)
3) LoadPostBackData
4) Load
Here, I would like to force execution of 2 button_click events based on whether a particular control posted back.
4.1) imgBtnPrev5_Click()
4.2) imgBtnPrev4_Click()
Now, when the imgBtnPrev5_Click() is executed, the viewstate is already loaded, so we are fine. But after execution of imgBtnPrev5_Click(), I would like to update the viewstate object in memory & then call the overridden SavePageStateToPersistenceMedium (by passing that updated viewstate object as its parameter) and then before execution of imgBtnPrev4_Click(), I would like to call the overridden LoadPageStateFromPersistenceMedium.
5) RaisePostBackEvent
6) SaveViewState
7) Render
My question is, how do I update the "viewstate" object of the page - that is passed to SavePageStateToPersistenceMedium with the changes made to the controls in imgBtnPrev5_Click()?
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Oct 4, 2010
I'm creating a website of 5 pages using c# (asp.net).
How do i link 2 pages, ie., on click of a button on first page should take me to second page.
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