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

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

How to override the PreviewKeyDown event at the lower level

Posted By:      Posted Date: September 22, 2010    Points: 0   Category :WPF


In my WPF Page application, I have trapped the backspace key (just to prevent to application going back) at the page/window level but the TextBox Level I have to allow this key.

I am not sure how to do this.





View Complete Post

More Related Resource Links

Web Part working fine on the top-level page but 'Not Safe' error on lower-level pages.


I have created a Web Part which reads and parses the SharePoint logs in order to display usage information of the page it resides on.  The Web Part works perfectly on the top page, reading and displaying the information desired.  However, once the Web Part is added to any page lower in the site heirarchy (sub-page) the same Web Part throws the following error:

Web Part Error: A Web Part or Web Form Control on this Page cannot be displayed or imported. The type could not be found or it is not registered as safe.

Show Error Details
Hide Error Details

[UnsafeControlException: A Web Part or Web Form Control on this Page cannot be displayed or imported. The type could not be found or it is not registered as safe.]
  at Microsoft.SharePoint.ApplicationRuntime.SafeControls.GetTypeFromGuid(Guid guid)
  at Microsoft.SharePoint.WebPartPages.SPWebPartManager.CreateWebPartsFromRowSetData(Boolean onlyInitializeClosedWebParts)

Of course the current version of the Web Part is in the SafeControls list on the web.config.

The Web Part was originally designed to return site activity only for the top default.aspx page and worked fine but started to fail in the manner described above once I added the following line of code to return a SPCo

click event only firing for lower 100 pixel portion of vertical div

 I have a div on the left side of my page. when clicked I toggle a hidden div that flies out to the right. But the click event only works on the bottom portion of the div. The hidden div has a close button div in the lower right. to clicks fine. any ideas? code is below jquery <script type='text/javascript'> $(document).ready(function() { var $scrollingDiv = $("#divReportBanner"); $(window).scroll(function(){ $scrollingDiv .stop() .animate({"top": ($(window).scrollTop()) + "px"}, "fast" ); }); $('.toggle-button').click(function() { $("#divLeftMenuBody").animate({width:'toggle'},400); }); $('#divReportBanner').click(function() { $("#divLeftMenuBody").animate({width:'toggle'},400); }); }); </script> html <div id="divReportBanner" ></div> <div id="divLeftMenuBody" runat="server"> <div style=" overflow: scroll; overflow-x:hidden;width:365px; height:370px;">

Application level event without global.asax

I have a need to add an application level event (like Application_Start) but not in global.asax.  The reason that I can't use global.asax is because this is a web application for which I don't have source code but I want to add some functionality to it.  I need to insert an application start code and was wondering it there was anyway to do it.  I'm not sure that if I add a class or aspx page to the sie if it will dynamically compile since this is a web application.  I know this is a crazy request but let me know what you think.Also, this web site was written in .NET 2.0.Thanks.

How to get the Task/Components Source Creation Name at Event Handler level


My SSIS Package has Task1 and Task2, there is an Event Handler attached at Package level OnPreExecute event.


Events are captured fine on OnPreExecution of Package, Task1 and Task2 but

I want to capture the Source Creation Name at Event Handler level…I have only variables like SourceID, SourceName, SourceParentGUID and Creation Name at Event level... not the Source Creation Name.


Is there anyway we can capture the Task/Components Source Creation Name at Event Handler level??



Page onload event override through Feature


I am trying to override the page OnLoad event through Feature. i am following this link. 



here is element file which i created.

<?xml version="1.0" encoding="utf-8" ?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">


If I place an event handler on the package level will it capture all events?

If I place an event handler on the package level will it capture all events?
Mr Shaw

Auto generate page level event handlers?


Inside VS2010 is there a way of auto generating page level event handler code? 

A Low Level Look at ASP.NET Architecture

ASP.NET is a powerful platform for building Web applications, that provides a tremendous amount of flexibility and power for building just about any kind of Web application. Most people are familiar only with the high level frameworks like WebForms and WebServices which sit at the very top level of the ASP.NET hierarchy. In this article I'll describe the lower level aspects of ASP.NET and explain how requests move from Web Server to the ASP.NET runtime and then through the ASP.NET HTTP pipeline to process requests.

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)?


Dropdown Event (Template Field)



I have grid view control that includes a dropdown control in a template field.

I wish to execute some code when the value is changed in the dropdown list.  Can't figure out how to capture this event though?

Any suggestions?

Event ID 1011 - DefaultAppPool World Wid Web Pub. Serv. fatal communication error

We have a Windows 2003 server running IIS6 1.1 Framework. We have also installed a DNS and Active Directory in the same machine.

We're randomly getting the error you can see below. Sometimes it causes the recycling of process w3wp.exe (which on my understanding represents the application pool worker processd) and other times results on this process hanging and not responding to any request. To do iisrest temporarly solves the problem.

We were pointed to a possible permissions problem between the user we were runnig the DefaultAppPool with and registry entries used by the iis. We noticed the default predifined user we used, Network Service, wasn't found in the Active Directory, so we changed it by the default configurable user, IWAM_MACHINE_NAME, which is under the IIS_WPG Active Directory Grupo, which, in theory has the correct permissions to run the application pool.

Well, none of this worked and we are still getting this error.

This is driving us crazy and think the problem might have to do with having the Domain Controller/Active Directory and the IIS6 running on the same machine. We'll try now uninstalling this DC pointing to another one to see what happens.

Any help would be appreciated.

Thanks in advance,


Event Type: Warning

Event not raised while parsing xml file



In Visual Studio 2010 ASP.NET 4.0

I want to write a procedure to validate a xml file with a xsd. I found some examples on the web but the one i chose does not work as attended. The example uses XmlReader with a XmlReaderSettings and a ValidationEventHandler.

Here is the code

Protected Sub VerifyDes(ByVal filename As String)

        Dim xslDes As XmlReaderSettings = New XmlReaderSettings()
        xslDes.Schemas.Add("", "http://www.mysite.com/xsd/ValidData.xml")
        xslDes.ValidationType = ValidationType.Schema
        xslDes.ValidationFlags = XmlSchemaValidationFlags.ReportValidationWarnings

        AddHandler xslDes.ValidationEventHandler, AddressOf xslDesValidationEventHandler

        Dim des As XmlReader = XmlReader.Create(filename, xslDes)

        While (des.Read())

        End While

    End Sub

    Protected Sub xslDesValidationEventHandler(ByVal sender As Object, ByVal e As ValidationEventArgs)

        'some code here
    End Sub

I tested this procedure with a xml file which was well formed but contained some elements which were not conform to the xsd.

No event or error occured. It said the file was valid.

Then i tested with a badly formed file. A XmlException was raised but nothing happened with the ValidationEventHandler.

It seems lik

How to set up microsoft application blocks 4.0 to talk to event viewer


I need to set up the microsoft application blocks 4.0 on the server and connect it to my web project.  I need to set it up so that all the errors are logged in the event viewer.  So far I have found out how to set up a flat file listener and send the error to a log file but, not to the event viewer.  Any suggestions would be helpful.

    Composite control: How to bubble a textbox's TextChanged event?


    I've created a composite control that contains several controls, including a textbox. I'm trying to expose the TextChanged event of the textbox as an event on the composite control. I understand that events can be bubbled up the control hierarchy and handled at a higher level, which I've attempted to do, but I can't get the bubbled event to fire. When I drop the control on an aspx I can see the TextChanged event, I can subscribe to the event, but nothing ever happens. Any suggestions? Here is what I think is the relevant code:

    // My event
    private static readonly object EventTextChanged = new object();

    //Handle the bubbled event
    EventHandler textChangedHandler = (EventHandler)Events[EventTextChanged];
    protected override bool OnBubbleEvent(object source, EventArgs e) 
        bool handled = false;

    Reporting services in 2008 r2 how to get a report in a print button click event in my c#.net page


    how to  get a report in my c#.net page button lick event also steps to call a report from asp.net to reporting services


    Thanks in advance

    Creating Event Handler in Code behind


    Hi, so I have a control that is created in the code behind and generates fine but I can't figure out how to create an event handler for it.  I've found plenty of examples for it in C sharp, but none of them seem to apply to VB.  What I want to do is essentially this:

    myDropDownList.SelectedIndexChanged = "Event to do here"

    but it doesn't seem to work for me.

    Any suggestions are appreciated.

    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