State Management :: Storing Data Into Property?
Aug 28, 2010
I have written a property globally on page load i am storing setting some value into that property but on button click i am not able to retrieve the data. Is there any alternate way to save the data other than viewstate or sessionstate. Ex:
Partial Class _Default Inherits System.Web.UI.Page Private s As String Public Property Test() As String Get Return s End Get Set(ByVal value As String) s = value End Set End Property Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load If Not IsPostBack Then s = "Test" End If End Sub Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click s = "Champ" End Sub Protected Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button2.Click MsgBox(s.ToString()) End Sub End Class
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Sep 18, 2010
We have a scenario where we need to store large tables of data on Session in asp.net page. on a highlevel we have to store following data
1> A table (table 1) with 1000 rows and 8 to 10 columns.
2> A table(table 2) with 500 rows and 8 to 10 columns (actually user can add the data from table 1 to table 2, so as user keeps on adding from table 1 we remove the data and put it in table 2)
3> Another table(table 3) with 1000-1200 rows each having 3 columns.
We are having a webfarm, so we need to store it in either SateServer of Oracle DB,What would be the performance implications of storing such huge data on the server.
One more thing is at any point of time max of 70 -80 people will be accessing our website, so will this cause any performance degradation?
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Jun 9, 2010
I have a scenario for which I wanted the best solution in asp.net c#. My application allows users to retrieve search data from database, this data is the users own temporary list of records which they can search, delete records or select them. All these actions are only on users temporary data list and not on the data base. I have currently carried out this functionality using data table which is stored in session. This method is causing problems when huge amounts of data is held in session (eg: 7000 records). I need a best possible solution for this. Is creating temporary tables an option? Can it be assigned to particular user sessions? Please point me to the right direction and right articles.
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Nov 6, 2010
I am fetching data from .xls file and storing it in to database. Then my users work on a single table where I stored all .xls data. But the problem is that it takes tooooo much time.. So, I want to use cache. But I never used this... Can any one tell me this example how can I use cache with database for increasing application speed?
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Jun 1, 2010
I've begun building a bit of a framework that I wouldnt mind working with. The idea is to create a framework that makes it even easier to create CMS addons (So basically a CMS framework).
One of my goals with this project, was having all modules made within the framework automatically support version without any extra coding.
More to the point, the way that I started building this, many pieces (Lots had to do with the versioning system) became interlinked. A version Object in the code related directly to a Module Object and vice versa, therefore the class definitions for each relate to eac otherh. (So having only the Module object, i could access the versioning object and all of its properties). My issue with this is of course what happens if i have both the module and versioning objects in my code simoultaneously, resulting in having not just duplicates of the data within the code, but (perhaps) infinite amounts, killing the app.
So what im wondering is, what if my modules properties where stored within the cache? Ie if i had the Module object, and it had the property ID -- Then the data for ID would be stored in the cache within the module object. Referencing the value simply retrieves the value from the cache if it exists there, and the SQL database if it doesnt. This way, all instances of the module that may be running at the same time will have access to the same information, at the same time, and hopefully causing it to use less space in total.
I would then add a function, so that if a developer was loading a rarely used module, or dident want to occupy cache space with large amounts of data, then they could just call a Dispose function that would remove the data from the cache.
Does this method sound reasonable? I know this probably isnt what the cache is designed for -- but I cant think of any other way to do this without having an infinite loop of objects referring to each other, or causing huge discrepencies from having different instances of objects referencing values that should be the same, but arent because they are technically different instances.
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Apr 6, 2010
I am developing questionare web site, where user has to answer around 55 questions. Its basically a check / uncheck option. So when user submit I store the value in DB.
The issue I am facing is if user selectes all the option, cookie value is lost. I see only 50 records can be stored (Request.Cookies.AllKeys)
Even the SessionID value is lost.Any solution / work around.
I need to store in the client side only. because if the user choose all options and do not submit. The values can be stored in the cookie and later point if he comes back we can read and give to him
ASP.NET / C#
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Nov 11, 2010
anybody tell me how can i check session is storing value or not?
actully i am using first time session variable to store datatable gridview but do't know that is saving value or not actully in my grid when user inser first row entry then it is ok when click on new row button then new row generate but previous row value lost.
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Oct 28, 2010
I am storing Datatable in Session variable in my project. Is it good practise to do so? The datatable has 20 fields and can run into 1000+ records. Will it hamper my application performance?
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Jun 3, 2010
get the list of all sessionid which will be running onto server without storing them anywhere.
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Apr 14, 2010
I am having two aspx pages(Page1.aspx,Page2.aspx).I am stioring values in Session in Page1.aspx and retriving the same values from Page2.aspx.But if the session value is null I am getting an error as 'Object reference not set to an instance of an object.'Here is my code..
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Nov 29, 2010
I am writing a web page that returns a small volume of data from a database table. The database is polled every 1 second and the data will be the same for every user. As every user is accessing the same data, there is no need for each user to poll the database and use up db resource.
Therefore, I think I should be using application caching to store the data in a dataset. However, I am slightly stumped as to how to do this.... because how can i ensure that the dataset is kept up to date.
The only way I can think to do this is to have a master user/session (i.e. the first session in the application) that keeps the cache object updated every second, then other users can use that cache object. If the first session ends, then the next requestor of the cache will pick up responsibility for keeping the dataset up to date.
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Oct 27, 2010
I have heard alot about sql injection and how it is normally caused. Mostly sql injection in my opinion is caused through search boxes. Now my question is quite simple. Is it advisable to store the search keyword in a session variable to prevent sql injection? I don't want to expose the keyword through the querystring as it is prone to attacks. So in short there is no harm in using session variables to store the keyword right?
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Oct 18, 2010
I have a gridview and a checkbox. I am able to pass the checkbox id to a textbox in the same page. This is then passed as a session variable. However, when I place an option to page and select the checkbox items in the next page, the session variable resets.Please see below code, how do I store "all checkbox" throughout all paging and store it in the session page?
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Behind code VB:
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Dec 28, 2010
I need to retrieve Username from the login page in my ASP.NET application so that it is available in other pages also. I am using VS2008. Is there any other of getting the value other than storing them in session.
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Apr 29, 2010
Input: - 3 excel files storing them into global temporary tables after reading cell by cell.
Requirement is to process inputs files and generate a single excel report.
After report gets exported, data in tables in should be deleted (i am using global temp tables for this).
But the problem is, two users are unable to generate report simultaneously.
Is this problem with global temporary tables?
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Mar 28, 2010
I'm having a problem with a class library I'm building. I have a class called Users and inside this class I have a property called UserInfo that is an object. Both of the classes Users and UserInfo are built using MyGenerations dOOdads. When I create an object instance of the Users class I am able to access the UserInfo property without a problem in my Windows App, however when I using the same library in a website the UserInfo property continues to return a no reference error. Like I said when running it in a WinApp I have no problems at all, I can access the UserInfo property and likewise all of UserInfo's properties. I am also having problems trying to debug the library using the website. And again I have no problems when using the WinApp. The way I've set it up is I have the Class library project open, and then I add the WinApp project and then the website project. When I set the WinApp as the startup project and run it I have no problems, I can set breakpoints and step through the code no problem. But when I set the Website as the startup project and try to debug I get a massage saying the breakpoint won't be hit. I then do what it tells me and right click on the breakpoint and set the location to allow the source to be different. This lets me hit the breakpoint, but every time I hit F10 to step I get "There is no source code available for the current location." For every step I take. This is making it really hard for me to figure out what going on with the code in the website. Sorry for the lengthy explanation. Here's the Users class, again it works great in the WinApp, just not the website.
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Mar 31, 2011
I have created a user control with a property named CurrentPage. When a link button is clicked it runs PostbackToPage() and passes a command argument in which then sets the CurrentPage property with this new value. On the page which uses the user control I am trying to display the updated CurrentPage property after a postback. When I click the link button to cause the postback the CurrentPage is the default value. However when I click it again it works as expected. So it seems to only work after 2 postbacks. How can I get this to work after the first postback?
User control code behind:
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User control design:
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Page which uses user control:
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Oct 17, 2010
I want to know , how good / bad is it to save configuration values in a static properties?I am creating an application which reads configuration from an XML file and a DataContext file, instead of sending the CustomConfig class into the configuration.xml each time I tought about using an ReadXml() method on application_start at the global.ascx
the ReadXml() method would save the data in static properties of CustomConfig and whereever I would want to read that particler data I would ask CustomConfig.PROERTY_NAME
My question is ? how smart it is ? how long does IIS would save the data in a static member? (if as long as the application exists then I'm ok as long as I add the ReadXml() in the application_start)
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Sep 29, 2010
I have an object to hold some specific state information in my web application - I pass it back & forward between pages by making it a property of a basepage which works fine, but I lose it on postback.
Is there any way to persist this property without manually adding & reading it again from viewstate?
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Mar 25, 2011
I have got an ASP.Net website, where the data is brought in from ISeries.The data connection to ISeries is quite slow and the speed is quite important for this website. Because of the slow speed of data retrieval from ISeries, I want to make as less database connections as possible.So, I was thinking about storing tables from the database which rarely changes as static properties in my website. Whenevera user logs in I submit a thread which refreshes the data in the static property. Is this approach correct? If not, what are the problems with this approach and what are the possible alternatives?
Example:-
For list of ports, I submit the below thread when user logs on:-
[Code]....
In class Ports, there are 2 methods -
one for populating the static property PortList, and the other checks if the thread is alive and waits for the thread to complete and retrieve the list of ports, once it is complete. The second method is the one which I use in my application whenever I need the list of ports (populating a dropdown, etc).
[Code]....
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Nov 23, 2010
I am using asp.net mvc 2.0 to implement shopping cart application.My situation is , I have a order page, there i am adding the products to the Cart.Below it will show the Cart total.Next i will go to the shopping cart page to delete or editing the items.In this page it will show the same cart total as in the Order page.
But once again if i go back to the Order page to order some more products to the cart,the cart total in the order page is showing 0 amount. This is my Shopping cart controller action method,
public ActionResult ShoppingCart(int eventID)
{
Event e = eRepository.GetEvent(eventID);
var cart = Stalbans.Models.ShoppingCart.GetCart(this.HttpContext);
[Code]....
So once i will go to the shopping cart page from the order page and again coming back to the order page it has to show the same cart total. Actually data is persisted in the cart total but it is not showing .Because if you add one more item its amount will added to the existimng cart total and then shows the current cart total. So for the first time i click back at that it has to show the already existed cart total in the cart total value.
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Feb 25, 2011
when we go for client and server side state management in asp.net
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May 29, 2010
I am doing a POC of making my website run faster. Currently it stores huge object data in Session while passing information from one page to another. What I was thinking is to use shared methods and properties instead of session. It works, but wanted tocheck if this is an optimum way to do it. Below is the code that does not use session but still pass object data from one page to another:
[code]...
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Nov 18, 2010
i have a form on page1.aspx with several controls (textbox, dropdownlist, etc).on Page1 PageLoad event i load data from database and performe databinding.From Page1 a user can, by clicking a specific button, move to Page2.aspx to insert some details and, after saving details, he returns to page1.
if save changes are made on control on page1 before save them to db, obviously, these are lost on return from page2 (because are reloaded on pageload from db).How can i save control status between pages round trip?
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Aug 16, 2010
i need to know the full concepts state manegemnt in asp.net,..in which site i will get the correct concept for state management....
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