.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
Gaurav Pal
Post New Web Links

Concurrent user data mismatch test

Posted By:      Posted Date: October 05, 2010    Points: 0   Category :Sql Server


I need to test  a medical application, where huge number of users updating the DB at the same time. I am thinking  there is possibility of data mismatch among the  records. Is there any tools available to test this scenario.  My application developed with ASP and MSSQL as DB.




View Complete Post

More Related Resource Links

InfoPath Forms Services has detected a mismatch between the user's data in the browser and on the s


Hi All,

I am getting following error message in my SharePoint Logs,

InfoPath Forms Services has detected a mismatch between the user's data in the browser and on the server. This may indicate the SESSION_STATE_PASCAL_CASED is not configured properly on a multiple front end farm or that a malicious user is trying to tamper with client data.

Any idea how to solve this issue ?


Muhammad Tariq khan

Linq - add data to database then email user the details


Hi all

I'm not sure how to structure the code for this but what I want to do is be able to add data to a database, and once this has completed successfully, then email the user to say the details have been added successfully to the database.

I need to:

1. Check that the relevant data has been added into the database then

2. Email the details of the relevant data when completed. 


Thanks in advance for your help,




logged in user data


I'm using the defualt membership provider, i created a table and used the gridview on the logged in user page to show his information such as address e-mail phone zip code etc,, how can i do this without writing a code?

I am new to asp.net  i need simple help please?

Storing User Data



I'm trying to get the current logged in UserId Value, using this code

Protected Sub UserProfileDataSource_Selecting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.SqlDataSourceSelectingEventArgs) Handles UserProfileDataSource.Selecting      ' Get a reference to the currently logged on user      Dim currentUser As MembershipUser = Membership.GetUser()      ' Determine the currently logged on user's UserId value      Dim currentUserId As Guid = CType(currentUser.ProviderUserKey, Guid)      ' Assign the currently logged on user's UserId to the @UserId parameter      e.Command.Parameters("@UserId").Value = currentUserId End Sub

But, I getting an error (NullReferenceException), I did set a url authorization on the page that i try to get the logged in user information, witch is info.aspx, and I made the login.aspx control to be redirected to the info.aspx after the login process, But the info.aspx  only shows me (access in denied), how can i make this page knows that i am already logged in?

Persist data in a dynamically populated ListBox in a user control


Hi All,

I am trying to persist data in a dynamically populated ListBox in a user control. Here are the details

I have a user control which contains a a listBox and button. On Page_Load of user control I am populating the ListBox control with some values. On Click of button, I am trying to fetch the values which I have selected in ListBox. Though this seems very simple and straight forward I am unable to fetch values.

My Page_Load Function

void Page_Load(object sender, EventArgs e)










My Click Function

Protected Void Button1_Click(object sender, EventArgs e)


       string strValue = listBox.SelectedValue



I have placed brake point at Page_Load and on click function, I am seeing that the moment the breakpoin

Concurrent Affairs: Data-Parallel Patterns and PLINQ


Multicore processors are now ubiquitous on mainstream desktop computers, but applications that use their full potential are still difficult to write. Version 4 of the .NET Framework will deliver several tools that programmers can employ to make this task easier. This article explores the use of one of those tools: Parallel LINQ (PLINQ).

Igor Ostrovsky

MSDN Magazine December 2009

Toolbox: Realistic Test Data, Dare Obasanjo's Blog, Color-Coding Tools, and More


This month Scott shows how to generate realistic test data, visits Dare Obasanjo's blog, and demonstrates color coding code for better readability.

Scott Mitchell

MSDN Magazine October 2008

Test Run: Using Excel For Test Data


This month see how to use Excel for test automation storage, whether you're just starting out with NET, or you're an advanced programmer.

Dr. James McCaffrey

MSDN Magazine November 2006

Toolbox: User-Friendly UIs, Online Data Entry Controls, and More


Microsoft® Office is one of the most well-known and most-used consumer products. For many people, their only experience with a computer is when using Office, be it checking e-mail, creating presentations, or writing a document.

Scott Mitchell

MSDN Magazine February 2006

Multiprocessor Optimizations: Fine-Tuning Concurrent Access to Large Data Collections


Application performance involves more than just speed. In a Web server environment, top performance also means ensuring that the maximum numbers of users can be served concurrently. This can be accomplished through efficient use of multiprocessor machines and thread management. This article presents techniques that can solve a number of concurrency problems. One approach, using thread management, controls access to a database on a per-thread basis, which protects the integrity of the data. In the article, reusable thread classes are built and presented. The classes are then tested and their performance in a live environment is examined.

Ian Emmons

MSDN Magazine August 2001

override error message (The value 'test' is not valid for Age) when input incorrect data type for in


Hello everyone,

I've tried to override error message when input incorrect data type in input field on HTML form. For example I have the model like this.

public class Person
public string FirstName {get;set;}
public int Age {get;set;}


For view, I put text input for Age to get it value.

When type some string in Age text box like 'test' and press submit button. I got this error message

The value 'xxx' is not valid for Age

However, I want to change this message and try many way. There 's nothing effect this message value.

Please could you help me to solve this problem.

Insert data based on gridview user value on row.. how to



I have three column comes from database table(Table1) and one column is for entering data for the user let us consider it look like this 

ItemNo ItemName Qty  uservalue

001       A               50       20

002       A               20       5

003       B               50  

004       C               60      10

005       D               40 

006       E               90      15 


If its 300 row from database to gridview it will show 50 record with page navigation..

What i need is i need to insert data in to database table which gridview row has user value..

The output of the another table(Table2) will look like this after insert

ItemNo ItemName   uservalue

001       A                    20

002       A                      5  

How to process data AFTER page is completely loaded for the user?


I have some logging that has to be done, which are some database update or inserts.

However this logging is of no importance to the user, so I only want to process the data/logs after the page is completed for the user.
As of now, if I process the data while the page is loading, I go from 1.4 to 2.0 speed (server side time processing of code), which is quite a bit comparing it is of no use to the user.

So I want this code only executed after that the page is complete.

I've been checking out Ajax, async pages etc, but the problem is it still gets executed before the page is rendered to the client, which means the client will have to wait longer then it is not being processed.

I've been checking out Threadpool.queueBackgroundWorker, however if I get it correct, this will still be executed before the page is shown to the user, as it has to complete before the prerender.

Then I thought about creating a new thread, and do the processing there, which would not have my page waiting to complete the data/logging.
However when I have 100 or 200 users loading pages at the same time, then that would mean I would be creating 200 threads on those loads, which I doubt will be good for performance. So if I want to solve this, I would have to create my own threadpool and only assign for example a max of 40 threads to it which can pr

Generate Test Data


Entering test data can be a tedious chore. Recently I found a web site that makes it easier to populate your database tables with realistic data, http://www.generatedata.com/ This is a very useful online utility. It really saves me a lot of time because I often waste an incredible amount of time just deciding on a name for a fictitious user. I also waste time looking for real addresses, phone numbers, etc. 

I wish I had thought of this as a project because it would have been easy to create and it gives you a certain amount of fame with other programmers. There are a few improvements that could be made to it so maybe somebody in the ASP.NET community could create an alternative service with the following improvements:

  1. Generate random amounts in various currencies. Don't know why the original version overlooks this obvious need.
  2. Add SQL Server and Access to the database choices.
  3. Generate random floats
  4. Generate random boolean values
  5. Fixed string values. You can sort of do this by entering a custom list with just one value.

Send an Email with User fields data entered in the form


Hi All,

          I have a form which have some user input fields(like textboxes,dropdownlists,textarea etc) fields and a submit button.

on click i need to send email with body contents as all the details entered by user in the form

Can anyone suggest how i should approach to this in sharepoint..

any code examples would be appreciated.


Modify User in Collect Data from User Workflow


I've created a workflow with a Collect Data from User action that emails a Group when the task is created. Once the task is claimed by an individual, the Assigned To column in the task list is updated to display that person's name but once the task is completed the email variable for the action is not updated and the group is emailed instead of the person listed as Assigned To.

So the question is this: Is there a way to update the user varialbe in the workflow task once the task is completed, or would I need to build my own workflow and use the Send Email action?

ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend