i am still relatively new to web development and have been encountering some issues when multiple users click a button at the same time.
i was wondering what could be causing this as i have already removed all static variables realiseing that was a mistake and replaced them with viewstates were needed then sessions when moving across pages
How to Protect Web services from Un authenticated users.. right now Im Using Protected Access specifiers.. Is it Correct method To Protect Web services?
View 1 RepliesI have an ASP.Net 4.0 web application which very frequently loads data from the database and does heavy calculations on it. I want to cache this loaded and prepared data in a central cache that can be accessed by every user and computer who uses the application.
Simple use-case:
User 1 accesses webpage, cache is empty, data is loaded/calculated, data is cached
User 2 accesses webpage, cache contains data, data loaded from cache
User 3 accesses webpage, cache contains data, data loaded from cache
User 1 reloads webpage, cache contains data, data loaded from cache
Cache expires
User 3 refreshes webpage, cache is empty, data is loaded/calculated, data is cached
I know that ASP.Net has a built-in cache mechanism. What I don't know is whether it can be shared between different users accessing the site on different computer at the same time. I would also like to know how the system behaves in a web farm environment.
i have one web service how can i give access to that web service to many user(with secure method). Now i am checking url and only doing for one site. So what should i do.
View 1 RepliesI have to update the users based on input value..
here is my code..
<fieldset>
<legend>StudnetInfo</legend>
here i have two textboxes and two dropdown list boxes.. this is the fiedlset user is going to enter their information..
</fieldset>
on the same page i have couple of other Fieldset with there studentInfo with twotextboxes and two dropdownlistboxes smililarly above Fieldset..this data dynamically generated from database for each users.
so all here my intension is insted of updating each and every Fieldset i made one generic fieldset to update all other Fieldsets information
on the Generic view I have this BeginForm
<% using (Html.BeginForm("Update", "home", FormMethod.Post,
new { @id="studentid"}))
{ %>
my JsonResult is
public JsonResult Update(StudentBE e)
{
try
{
var UStatus = Generic.UpdateStudent(e.student,"","");
return Json(UStatus.ToString());
}
catch (Exception ex)
{
return Json(ex.ToString());
}
finally
{
}
}
using this I can update only one user perfectly but I need to loo update all users based on generic Filedset values?
I'm using .Net 2008 and Oracle 10g as my database. The problem I'm getting is after deploying the application in IIS, when multiple users access the same page at a time i'm getting the error. Can't get the output.
Note: Both the users accessing the same page, same menu at a time.
How can I resolve this?
I have one SP in sql server which takes the data from user and inserts into three tables. My problem is if multiple users call the same SP in same time it throwing error..(I guess one user at a time can access the table and table will be locked, that is why remaning users getting error)how to handle this situation. it is a web application, so at a time so many people can call the same SP.How can many users insert data in the same table in the same time?
View 5 RepliesIf I declare a public variable in my module then publish it out on the server...then have multiple users using the app will the variable get overwritten each time a user calls it?
View 1 RepliesI wanted to know how to prevent more than one user from uploading the report at a time .
This is a Windos based app written in c# . When User A clicks Upload option on one server from the menu to upload the files and at the same time when User B clicks Upload option on different server , User B should be alerted a message saying "User A's uploading is in progress,pls wait" . How to achieve this, with the code..I am thinking this logic should be kept in a stored proc, How do I write that proc?
I am using vs2008
I am having one solutions with Mutiple Projects
Example
1.PayRoll [ Project 1 ]
2.Employee Portal [ Project 2 ]
MyWorkPlace[Folder Name]
BasicInfo.aspx
LeaveInfo.aspx .....Etc
these two Projects run SeparateURL
Database is Common for Both Project
In Both Project i am Generating Dynamic Menu Only..
in DB ///
Forms URL
Leave ../../MyWorkPlace/LeaveInfo.aspx
Profile ../../MyWorkPlace/BasicInfo.aspx
Like this only Menu url wil be Given in Database.
Menu Wil come i Both Application..
But Pages are in Project 2[ Employee Portal Only ] but i have to access this Pages in
Project 1 [Payroll]
What whould be the best way to prevent multiple users on a page?
For example if a user is at the page "Home.aspx", no other users should be allowed to go there.
I'm using asp.net on the server and the js-frameword jQuery on the client side.
In my web application, some users open app in multiple browser page. How can I catch users when they do it?
Edit about why I need such this thing: I have a variable named DealerID, carried between pages with session. Some users want that: "While I make my jobs with a DealerID in one page, make other jobs with another DealerID on another page"
i have create web application for school management system...bt when i run my webside...(my welcome page is defaul.aspx bt if i want to acces studentdetail.aspx then i only enter url and i get studentdetail.aspx)
View 1 Repliesi have to access a Accdb and update it through a Web service!
View 2 RepliesI am getting error while accessing entity model from web serviceSystem.NotSupportedException: SQL Server Compact is not intended for ASP.NET development. at System.Data.SqlServerCe.SqlCeRestriction.CheckExplicitWebHosting() at System.Data.SqlServerCe.SqlCeConnection..ctor() at System.Data.SqlServerCe.SqlCeProviderFactory.CreateConnection() at System.Data.EntityClient.EntityConnection.GetStoreConnection(DbProviderFactory factory) at System.Data.EntityClient.EntityConnection.ChangeConnectionString(String newConnectionString) at System.Data.EntityClient.EntityConnection..ctor(String connectionString) at System.Data.Objects.ObjectContext.CreateEntityConnection(String connectionString) at System.Data.Objects.ObjectContext..ctor(String connectionString, String defaultContainerName) at DataModel.LabTestDBEntities..ctor() in d:projects4.0 vs2010labtestlabtestsolutiondatamodeldbmodel.designer.cs:line 26 at DataService.Service1..ctor() in D:Projects4.0 VS2010LabTestLabTestSolutionDataServiceService1.asmx.cs:line 23
View 4 RepliesWe have a few scenarios which mean users can see other users data if they're on the same machine.
Scenario 1
Login User A Browse to forms with perosnal data Logout User A Login User B Either hit back button until you reach User A's personal data or.. Use browser history to jump directly to user A's personal data.
Scenario 2
Login User A Browse to forms with personal data Close browser New Browser, Use history to go directly to User A's data.
The 2nd one was caused by the browser displaying the page from its cache, so for that one, I added the following to the web.config..
[Code]....
[Code]....
which seems to do the trick, but I need to know how to fix the first part and whether the web.config changes are all that's needed to clear any cache.
I have a web site with an administrative section. All administrative pages are stored in a directory called "db/administration". There is only one user that I want to have access to the pages in this directory. That user's username is "system". Currently, I am using the following approach in my web.config file:
[Code]....
When I logged in as another user, I was still able to access pages under db/administration when I navigated to them through the browser's address bar. What am I doing wrong?
I need to send emails based on users input time and day (based on their time zone)? Kind of a reminder.
For Example: User input 2:00pm Eastern Time on my server I have different time zone, how to calculate the time and send the email at users time-zone. Its a web application. What is the best way to accomplish it using asp.net c#? If somebody already done it in the past I will be glad to take a look at source code.
So I have a text box and a button, once the user types something in the text box, and then click button, I posted the typed text into a div control on the same page.Now my problem is that, the text box appears to have the typed text, how to resolve this type of issue? I don't want to redirect users all the time after they click the button.
View 4 RepliesI've got a website and we just had a huge jump in traffic. Now all of the sudden we're getting sql parameter errors left and right. We switched to a new sql server a few weeks ago and everything has been fine but the added traffic seems to be breaking us.
I have a data access class that is called when each user trys to logon. It runs through several tasks before finally updating the users last login date and forwarding them to the administration section.
What I'm seeing from the trace logs suggests that when I'm logging in the first several tasks are using my data (lets say user=birk pass=word). But at some point the accessor class starts sending over the data from someone else who's trying to login (lets say user=abcxyz)
Every connection we make to the server is closed when we're finished with it. I'm nulling out all of the accessor objects when I'm finished with them. But somehow different user data from different sessions are making their way into other peoples instances of the object.
I'm not using session/application/cache/viewstate to store the objects so I'm not really seeing how they could edit eachother... Its just really weird and I'm not sure how to even go about researching the problem.
This is roughly the accessor class... I trimmed out some of the parts that weren't reliant to the issue
[Code]....
I have designed a navigation structure that is customisable from within my application and linked to the users role.
So I can restrict what menu items a user gets based on their role.
I have managed to do this quite well using SQL Tables and an ASP.Net Menu.
I can get it to only show the menuitems that are marked active and I have created an Stored procedure to get the menu items for a particular role.
Where I am struggling is getting the Logged On Users Roleid to pass it to the Stored Procedure.
I can get it using a regular aspx page but my menu is on my masterpage and I do not want to have to code it in each and every page.
I even tried to do it with a user-control but same happens. It seems that the User class is just not available when in a masterpage.
how I can pass the roleid from a Class or something or from the page to the masterpage?
I need to do an insert into a database table (SQL Server). I want to compute value of 1 column based on the existing data and then do an insert. How do I prevent another user from getting access to the database in the middle of this process?
View 2 RepliesI have a webservice which returns the content of a pdf.
I've noticed that when I've left the website for a while and I call the method of the service it takes a long time to respond.
I had created a Membership ASP.NET 3.5 website and selected the Forms authentication. Therefore, I created several users with related information into the ASPNETDB database. Yesterday, I changed the website security to Windows authentication.
This morning, when reviewing the ASPNETDB data for another website, I still can see those Membership Forms users and their ApplicationIDs in the aspnet_Users and aspnet_membership tables. How can I delete those Forms users?
Another question: In aspnet_Applications table, I can see the ApplicationName (e.g. /WebPartsDemo) for the Web Parts websites. I have 2 ApplicationIDs in the aspnet_Membership table. I can not see only one ApplicationID in the aspnet_Applications table, but with an empty ApplicationName, i.e. / only.
Do I miss something when creating the Membership website? What is the ApplicationName for the Membership website?
I have added a service from a Win2003 server to my Visual Studio project on WinXP machine. Create an oject for this service went OK. But when I tried to run a method in the service I get "401 web exception while accessing a service.".
How to proceed?