.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

system wide pulsed event

Posted By:      Posted Date: September 14, 2010    Points: 0   Category :.NET Framework
Can a thread signal an event which is being waited for by a thread running in another process? I have a requirement where multiple processes feed a queue which sends requiests to amazon web services for info on books and offers to sell the book. Currently the request queue is a database table, so any process on the system can place an entry on the queue for the background process to read and send to amazon.  I need a way to signal requesters that the background process has processed a request. ( I am assuming that semaphores and mutexes can only be signaled and waited for within the same process. ) thanks,  

View Complete Post

More Related Resource Links

Team System: Team Foundation Server Event Service


Use the Team Foundation Server EventService to create and manage event subscriptions or create a Web service to receive and process events.

Brian A. Randell

MSDN Magazine May 2008

SENS: System Event Notification Services and WMI Enable Flexible, Efficient Mobile Network Computing


Networked applications must deal with a host of connection problems ranging from timeouts to congestion to unavailability. If these applications can check the current connection status and, when disconnected, cache transmissions, they become more efficient. Fortunately, both the System Event Notification System (SENS) and Windows Management Instrumentation (WMI) can send notifications to keep applications informed of network status. In this article, the author explains the use of several SENS interfaces, including ISensNetwork and ISensLogon, which trigger events for connects/disconnects and logons/logoffs, respectively. The author then shows how you can subscribe to each of these events, and follows with a discussion of when you might use WMI events instead.

Aspi Havewala

MSDN Magazine August 2002

'Completed' is not an event of 'System.Activities.WorkflowApplication'

Hello,I have a C# code which i have converted into VB.But i am getting compile error in VB code:'Completed' is not an event of 'System.Activities.WorkflowApplication'find below C# and VB code:C#:application.Completed += delegate(WorkflowApplicationCompletedEventArgs e){completedEvent.Set();};VB : AddHandler PickSample.application.Completed, Sub(e As WorkflowApplicationCompletedEventArgs) completedEvent.Set()Can some one provide me solution ?

System.Runtime.InteropServices.COMException with Event Handlers

hi,           i have written an ItemDeleting Event handler for a document library which holds images. the itemdeleting eventhandler works fine and displays the  errormessage on sharepoint error page when properties.cancel=true and properties.ErrorMessage="This Image is still being used in Announcements. Cannot Delete. ". this works fine when i delete from the doclibrary itself. when i delete the images in the document library from the ImageManger Tool of RadEditor it throws the com exception as follows instead of the sharepoint error page Server Error in '/' Application. -------------------------------------------------------------------------------- This Image is still being used in Announcements. Cannot Delete. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Runtime.InteropServices.COMException: This Image is still being used in Announcements. Cannot Delete. can anyone suggest, how to reslove this issue.? i have the screenshots,which would better explain but i dont know how to paste images into this forum? kindly let me know how to upload images to this forums also. thank you all

Code in an event handler not working when used with system reflection.

Hi, I am presently writing an application that uses an MDI form with a ToolStrip on it. I have the need to build the menu items dynamically using an XML file. The format of the XML file is as follows: <ContextMenu EventHandlerHost="vFrmPDUsetup"> <!-- These styles will be applied to the menu items. Individual menu item styles can be override by defining as an attibute to the specific menu item, see below --> <Style> <MenuStripBackColour>Transparent</MenuStripBackColour> <BackColour></BackColour> <ForeColour>Chartreuse</ForeColour> <BackImage></BackImage> <!-- Must exist in Images folder --> <FontName>Tahoma</FontName> <FontSize>10</FontSize> <FontStyle>Bold</FontStyle> </Style> <!-- Attributes: Key = Resource Key name in resource file Image = image to display before text, image must exist in Images folder BackImage = background image, image must exist in Images folder BackColour = background colour as colour name ForeColour = foreground colour as colour name FontSize = size of font as value Seperator = add a menu seperator OnClick = click event pointing to the event handler method which must be defined as the MenuItem_ + <attibute value> &

Event ID 7000 - The system cannot find the path specified.


This is a very old prolem that i am getting to. First off I went through anywhere from 4 to 6 or more sessions with a Microsoft TECH and it even escalated a couple of levels of TECH support to boot. I can't remember the details specifically. I do know that I've started with gound up (installed/uninstalled NET Framework versions) installs to where I have all the versions installed. The Service doesn't start either automatically nor manual. I tried the patience of the Support people to fix this last error at that time.

I am starting anew to get the NET Framework Service to work properly . I hope I am in the right support forum.


How to determine whether user initiated an event or the system?



I am going to be writing an application where I need to determine wether it was the user (by clicking on an comboboxitem for example) that initiated an event, or that is was the system(for example the selection of a combobox changes when a specific code executes or something like that) Could someone give me some pointers in the right direction here?

Thanks in advance

.NET Runtime 2.0 Error Reporting event id 5000 system.nullreferenceexception


I only found http://forums.microsoft.com/TechNet/ShowPost.aspx?PostID=389835&SiteID=17 regarding this error message and it was of no help to me.

Background: 3rd party program that extracts users from a AD group and manage user creation i a MSSQL 2000 server. Also sends e-mails using the SMTP service. The funny thing is that the program manages everything correctly, but writes an error in the Event log as it exists (below). Job is scheduled with the SQL server agent and runs with a doamin user that has local admin rights. We have the same setup on a testserver where it runs without problems.

Windows server 2003, MDAC 2.8, SQL Server 2000 SP3, .NET framework 2 on both servers.

Event Type: Error
Event Source: .NET Runtime 2.0 Error Reporting
Event Category: None
Event ID: 5000
Date:  2006-08-29
Time:  09:16:28
User:  N/A
Computer: STHPS0125
EventType clr20r3, P1 bzadbatch.exe, P2, P3 44e5c349, P4 bzadbatch, P5, P6 44e5c349, P7 25, P8 308, P9 system.nullreferenceexception, P10 NIL.

For more information, see Help and Support Center at

System.ComponentModel.PropertyChangedEventHandler not handling the event



I'm working in a wpf app that is binding controls to a class that implements INotifyPropertyChanged. I'm trying to track when there are changes to the underlying object by setting a flag whenever a property is changed. To do so, I wired up an event handler to the PropertyChanged event of the class like so:

_facilityLogic.PropertyChanged += new System.ComponentModel.PropertyChangedEventHandler(facilityLogic_PropertyChanged);


public void facilityLogic_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
Can anyone tell me why this event handler never gets called? The event is firing, but SetIsChanged() never gets called.

SSL System Impact on Sharepoint BDC, Workflow & Event handler



if SSL  implement on existing  Sharepoint portal .what is the impact of  existing Sharepoint BDC, Workflow &  Event handler ?




Surendra Singh

Event 18210 error - Operating system error 1130 (not enough server storage is available to process t


I tried for the last three days to do a restore over the network or copy the files from one server to another. I kept getting NOT Enough space but there is 500GB free for 49GB file.

OS: Windows Server 2008 64bits

SQL Server 2008 R2 Enterprise 64bits

Restoring using T-sql got the following error:

Msg 3203, Level 16, State 1, Line 1

Read on "\\servername\backup\xxxxx\xxxxx_backup.bak" failed: 1130(Not enough server storage is available to process this command.)

Msg 3013, Level 16, State 1, Line 1

RESTORE DATABASE is terminating abnormally.

Event log as the following:

BackupIoRequest::ReportIoError: read failure on backup device '\\servername\backup\xxxxx\xxxxx_backup.bak'. Operating system error 1130(Not enough server storage is available to process this command.).

I did some research and I found stuff for SQL 7 or windows XP or NT old s

System Development Life Cycle

The Systems Development Life Cycle (SDLC) is a conceptual model used in project management that describes the stages involved in an information system development project from an initial feasibility study through maintenance of the completed application. Various SDLC methodologies have been developed to guide the processes involved including the waterfall model (the original SDLC method), rapid application development (RAD), joint application development (JAD), the fountain model and the spiral model. Mostly, several models are combined into some sort of hybrid methodology

The Agile System Development Life Cycle (SDLC)

The goal of this article is to describe the agile system development life cycle (SDLC), putting it in context from what you may have heard about within the agile community and more importantly within the context of your overall IT efforts.

Performance Tests: Precise Run Time Measurements with System.Diagnostics.Stopwatch

Everybody who does performance optimization stumbles sooner or later over the Stopwatch class in the System.Diagnostics namespace. And everybody has noticed that the measurements of the same function on the same computer can differ 25% -30% in run time. This article shows how single threaded test programs must be designed to get an accuracy of 0.1% - 0.2% out of the Stopwatch class. With this accuracy, algorithms can be tested and compared.

Radio Button Event

Here I have explained the events of radio button with javascript.
Let me explain the scenarion first,
We are having two radio button say radioobtn1 and radiobtn2. If I click on the button 1 then I need to show one DIVor FORM. same as when I click on radiobtn 2. I have given the code for the above scenarion.

how to impose javascript event processing?


If I have some form control like textbox and I want the event handler to be located in the html instead of at the server side, how to do that? Of course I can copy paste javascript code in the aspx file. But is it possible to do that using some object oriented approach (ie programmatically in the code behind)?




hello i have the following problem

i have upload my content to hosting server but i get the following error

Security Exception

Description: The application attempted to perform an operation not allowed by the security policy.  To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file.

Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Web.AspNetHostingPermission, System, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[SecurityException: Request for the permission of typ
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