Byte Food

IE9 scroll jumps to the top when the browser has a scrollbar

2012-04-10T18:10:00.008+03:00

Internet Explorer 9 has one very strange behaviour where inner div's with scrollbars can jump up to the top by themselves.

In my case the problem happened when using jquery ui resizable and draggable on DIVs, when using IE9 and the browser has scrollbars (note that the problem only happens when the browser has scroll bars). If the DIV has an inner DIV with height 100% and overflow scroll or auto. When the outer DIV was resized or dragged the scroll of the inner DIV would jump to the top.

After a long investigation (with no google references found at all) I came down to this simple demo of the problem:

I filtered the problem down to changing the absolute position of a div in IE9 with scrollbars on the browser.

The solution: set "position: relative" on the BODY.

<html> <head runat="server"> <title>TEST</title> <script type="text/javascript" src="/Spreadex.Otp.Fins.Web/Scripts/framework/jquery-1.7.2.min.js"></script> </head> <body> <div id="resres" style="width: 1500px; height: 300px; background-color: Red; position: absolute; "> Test Resizable <div style="width: 300px; height: 100%; overflow: scroll" id="testScroll"> AAAAAAAAAAA BBBBBBBBBB CCCCCCCC BBBBBBBBBB CCCCCCCC BBBBBBBBBB CCCCCCCC BBBBBBBBBB CCCCCCCC BBBBBBBBBB CCCCCCCC BBBBBBBBBB CCCCCCCC BBBBBBBBBB CCCCCCCC BBBBBBBBBB CCCCCCCC BBBBBBBBBB CCCCCCCC BBBBBBBBBB CCCCCCCC BBBBBBBBBB CCCCCCCC BBBBBBBBBB CCCCCCCC BBBBBBBBBB CCCCCCCC </div> </div> <button onclick="res1()">res1</button> <button onclick="res2()">res2</button> <script type="text/javascript"> function res2() { //$('#resres').css({ top: 8 }); document.getElementById('resres').style.top = "8px"; } </script> </body> </html>

Downloading files with Internet Explorer 8 or below, and setting the Cache Control on ASP.NET MVC 3

2012-03-30T19:01:00.004+03:00

This one is worth posting since it took some time and lots of googling to figure out.
The web site is ASP.NET MVC3, the browser is IE8 or lower version.

When downloading a file with HTTPS we get the error:
"Internet Explorer cannot download filename from sitename. Internet Explorer was not able to open this Internet site. The requested site is either unavailable or cannot be found. Please try again later."

This is a "feature" on IE: See http://stackoverflow.com/questions/3415370/ie-unable-to-download-from-unable-to-open-this-internet-site-the-request

And the best workaround is to set the "cache-control" header to "private" for these browsers.

The next problem was that setting the cacheability on MVC3 only works if you set it to a value greater than what it is now. So if you set it to NoCache, you can not set it again to Private.
See http://weblogs.asp.net/andrewseven/archive/2005/04/06/SetCacheability.aspx

So, if your website has a generic nocache policy and you want to set a specific request to "private" you need to make sure NoCache is never being set on the same request.

Google Adwords conversion failing with Ajax

2011-12-06T17:30:00.004+02:00

Google adwords conversion script (conversion.js) uses document.write(), which prevents it from working correctly when using dynamic Ajax page loading.

Excelent workaround here:

http://articles.adamwrobel.com/2010/12/23/trigger-adwords-conversion-on-javascript-event

Visual Studio Macro: Locate Item in Solution Explorer

2011-08-31T16:32:00.000+03:00

This is a great macro that allows you to locate the current file in edition on the Solution Explorer:

Visual Studio Macro: Locate Item in Solution Explorer on Demand « Critical Development:

Using WinMerge with Team Explorer and TFS

2011-08-05T12:52:00.000+03:00

Nice page explaining how to change the default file compare on Visual Studio Team Explorer:

Rory Primrose | Using WinMerge with TFS

WCF and error serializing enums

2011-08-03T17:08:00.000+03:00

I had a similar problem as described here: WCF error caused by a serialisation issue

The exception thrown was too generic: The socket connection was aborted. This could be caused by an error processing your message or a receive timeout being exceeded by the remote host, or an underlying network resource issue. Local socket timeout was '00:00:59.7490000'

The best way to go to find reasons for problems not explicitly shown by WCF exceptions is to use the Trace Viewer described in this thread.

Exception was all in the log generated by the server side of WCF.

Visio diagram lines changed on copy paste?

2011-07-21T12:42:00.001+03:00

I drew my diagram on Vision 2003 all nice, when I copied it to Word the dashed lines were changed to solid lines!

Found the resolution on good old Microsoft Support site.

Dashed or dotted line patterns are converted to a solid line pattern when you embed a Visio 2003 object in another document

Using IDs in jQuery Mobile Pages

2011-07-18T18:33:00.002+03:00

With JQuery Mobile different server pages are loaded on the same client DOM.

If you need to access an element by ID or class which conflicts with another element on another page with the same ID or class (in my case it was the same page with different parameters) you can use the ancestor on the JQuery selector as described by cplee70 in this forum thread:

Using IDs in jQuery Mobile Pages - jQuery Forum: "

$('div.ui-page-active .lat') instead of just: $('.lat')

EDIT:

Better yet, I started using: $('.lat', $.mobile.activePage)

aspnet_wp.exe stopped unexpectedly

2010-06-23T19:49:00.002+03:00

On one of our deployed environments ASP.NET crashed completely when accessing an Interop dll that invokes MATLAB code.

We isolated the line of code that had the problem, this would run ok from a console application but crash miserly on ASP.NET. Event viewer shows "aspnet_wp.exe (PID: xxxx) stopped unexpectedly".

After spending a lot of time trying different things and googling, I finally ran into this one.

I'm not sure of the security consequences of this change, but since it is on the .NET context, for that environment it seems like a safe solution.

Xcopy not working from System.Diagnostics.Process.Start()

2009-10-15T15:34:00.001+03:00

This one wasn't easy.

See http://social.msdn.microsoft.com/Forums/en-US/netfxbcl/thread/ab3c0cc7-83c2-4a86-9188-40588b7d1a52/

"This is a quirk of xcopy.exe. If you redirect the output, you have to redirect the input as well."

SQL 2008 - "Saving changes is not permitted."

2009-09-07T10:22:00.001+03:00

On SQL 2008 Management Studio Icoudln't save the changes done on a table.

This seemed strange, but was easy to fix:

http://weblogs.asp.net/pabloperalta/archive/2008/09/23/sql-2008-quot-saving-changes-is-not-permitted-quot-error-message.aspx

Running dynamic javascript generated on the UpdatePanel partial postback

2009-04-21T21:28:00.003+03:00

I found this great piece of code that allows a more or less generic way of running javascript generated during the processing of a partial postback within an UpdatePanel.

It runs all the script inside script tags with a certain ID.

http://www.31a2ba2a-b718-11dc-8314-0800200c9a66.com/2008/08/dynamic-javascript-in-update-panel_19.html?showComment=1240338420000#c118959118652221112

Stuck with static constructor exception

2009-04-17T10:48:00.002+03:00

It took me quite some time to understand why I was getting allways the same exception on a static constructor. So this blog confirmed what I suspected. The exception is cached and thrown again:

http://weblogs.asp.net/avnerk/archive/2008/12/16/static-constructor-throws-the-same-exception-again-and-again.aspx

I found this with .NET2.0 I believe .NET 3.5 works differently since they added this to the documentation:

"If a static constructor throws an exception, the runtime will not invoke it a second time, and the type will remain uninitialized for the lifetime of the application domain in which your program is running"

Check if 2 dates belong to the same week

2009-03-18T17:08:00.002+02:00

I found this post while looking for the solution to the problem in C#.

http://quickduck.com/blog/2008/11/03/reader-challenge/

I endded up using the code:

   public static bool InSameWeek(DateTime d1, DateTime d2)
   {
   DateTime beginningOfWeekDate1 = GetFirstDayOfWeek(d1);
   DateTime beginningOfWeekDate2 = GetFirstDayOfWeek(d2);
   return beginningOfWeekDate1 == beginningOfWeekDate2;
   }

   ///
   /// Considers monday to be the first day of week
   ///
   ///
   ///
   private static DateTime GetFirstDayOfWeek(DateTime d)
   {
   switch (d.DayOfWeek)
   {
   case DayOfWeek.Monday:
   return d;
   case DayOfWeek.Tuesday:
   return d.AddDays(-1);
   case DayOfWeek.Wednesday:
   return d.AddDays(-2);
   case DayOfWeek.Thursday:
   return d.AddDays(-3);
   case DayOfWeek.Friday:
   return d.AddDays(-4);
   case DayOfWeek.Saturday:
   return d.AddDays(-5);
   case DayOfWeek.Sunday:
   return d.AddDays(-6);
   default:
   throw new ApplicationException();
   }
   }

Equals on Javascript between different types

2009-01-17T15:23:00.000+02:00

Equality with javascript between differetn types has it's pitfalls, for example between bool and string.
Fortunately there is the operator ===
'false' == '' -> true
'false' === '' -> false

See JavaScript pitfalls: null, false, undefined, NaN - MapbenderWiki

Return a result code from a batch file

2008-11-05T18:26:00.000+02:00

How to return a result code (ERRORLEVEL) from a batch file.
exit /B 63
See Batch script return code : return, batch, code, script

Enable or Disable Triggers on SQL Server 7.0

2008-10-13T14:17:00.000+03:00

Icreated a trigger to prevent deletion of data from a table. but of course in some cases (Database initialization) ı need to override the trigger. Here's how: Enable or Disable Triggers on SQL Server 7.0

Log unexpected exceptions in a windows service and in an APPDomain in general

2008-10-06T14:42:00.001+03:00

My services stopped without reason and I had no thing on the log except the System Event Log. A good solution to log fatal errors is to use the event AppDomain.CurrentDomain.UnhandledException (see Cannot catch Exception in a thread - .NET C#)

ınclude extra classes on a web service not referenced yb the parameters directly

2008-09-19T12:00:00.000+03:00

We created a webmethod that would receive a list of objects, Sometimes these objects are integers or strings, sometimes they can be a more complex type, like CustomClass[]. Turns out that with XmlIncludeAttribute solved the problem, thanks to this post: WebMethod can't serialise an array of custom type : ASMX Web Services and XML Serialization : .NET Development : MSDN Forums

F7 to switch from ASPX "Source" to C# codebehind

2008-07-11T18:57:00.000+03:00

The trick is to configure the View.ToggleDesigner to F7. From F7 to switch from ASPX "Source" to C# codebehind - doesn't work? - ASP.NET Forums

Caching in ASP.NET with a dependency on the SQL Server

2008-06-28T21:00:00.000+03:00

As I suspected when you use caching on ASP.NET 2.0 with SQL Server Dependency in SQL Server 2005 the system is not implemented with a polling mechanis as in previous versions of SQL Server. It uses the NOtifications Services to advise the ASP.NET that some cache item must be cleared. See Caching in ASP.NET with the SqlCacheDependency Class

Microsoft certification 70-536

2008-06-22T02:03:00.003+03:00

I just watched an excellent presentation about the Microsoft certification 70-536 (Microsoft .NET Framework). I was very impressed by the quality of the presentation and the functionalities of the player itself! I have one certification made 3 years ago, and I want to do some more pretty soon, from what I could understand the first one to take for developers is the 70-536. The presentation gives a general explanation about the content of the exam. It also gives out some links to resources (pasted below).

Books and training
C# Online learning guide
Practices Tests: measureup.com , selftestsoftware.com
Blog about MS certifications

I want to get 2 kinds of materials (books?) one on the theory and one with exercises, but I still couldn't understand what's the best place for that (everyone I talk to uses some pirate memorize-the-answers books, but I think I don't want to go that way)

Page with big table and many text inputs is stuck on loading, in IE

2008-05-26T17:57:00.003+03:00

Problem: A page with a table with 300 rows and a total of 1500 input text boxes was rendered fast but I couldn't scroll for 20 seconds. It seemed like the whole Internet Explorer was stuck, frozen doing something. I tried several things to find out where the problem was.

Removed all javascript from the page, still slow
Removed all elements from the page except the basic structure (html, body, form) and the table with the inputs, still slow
Took out all id and name attributes from the inputs, still slow
Removed the form tag, page opened and scrolled fast (we need the FORM though :P)
Removed the table and kept all 1500 inputs, page opened and scrolled fast (we need the layout though :P)

Tested the page on Firefox and it would load and scroll fast. So all I could find was that a page with a form with a table containing a considerable number of textboxes would freeze in IE for some time. After asking for the help of others, in the hope of some enlightment, we found out that a friend had no problems opening and scrolling the page! I quikly realized that the problem was in the Google Toolbar AutoFill functionality... It seems like Firefox doesn't have the same problem when using the Google Toolbar.

Share and Pin in Visual SourceSafe

2008-04-21T15:40:00.001+03:00

Nice step by step on what to do to share, branch and merge with VSS, and how to integrate that with Visual Studio 2005: Share and Pin in Visual SourceSafe | testingReflections.com

Nice article about Deadlock's

2008-04-02T13:39:00.001+03:00

Very helpfull in finding the reason behing the deadlocks: Bart Duncan's SQL Weblog : Deadlock Troubleshooting, Part 1