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• How Do I Convert text to a WAV file With Inaudible Waveform?

  - by Scott

  I am trying to create an audio watermarking system. I figure the best solution is to create an audio file (WAV) based on a unique string of text and then combine this with the original wav. The part that makes this tricky (for me anyway) is: How do I convert the text string to a wav? How do I ensure that the resulting WAV form is inaudible (or at least barely noticeable to the listener). I would prefer this be done server side (via PHP, etc) but if the processing load isn't too much then would be ok with something in Flash or Javascript. I'd be willing to pay someone to create me a workable solution (complete source code that functions as described). Thanks, Scott!

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• Is the first persistance of an Entity Data Model in EF 4.0 slower due to the connection cost ?

  - by Scott Davies

  Hi, I've got a console app written that persists an object graph via Entity Framework 4.0. I loop through this to dump the execution times for each persistance. The first persistance is always the largest. Is this due to EF making the initial connection to the database and/or JIT'ing ? Here's a sample of the output: Persisted graph in **3318** millseconds. Persisted graph in 25 millseconds. Persisted graph in 26 millseconds. Persisted graph in 22 millseconds. Thanks, Scott

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• Will a mulitouch touch screen equipped PC allow me to simulate real Android UI's without an Android device ?

  - by Scott Davies

  Hi, I have recently purchased a Samsung Galaxy Tab as an Android 2.x testbed (I am aware that 2.3 might not run on it, but it appears to be a good 1.x - 2.x device with a large enough screen to approximate the variety of screens on different phones). I would wait for Honeycomb equipped devices (such as the Motorola XOOM mentioned at CES 2011), but these are slated for some time in Q1 (likely end of Q1 for the Canadian market). If I get a multitouch capable PC and install the Android SDK and simulator, will I be able to use the multitouch functionality of the PC with the simulator to approximate a real device ? Does anyone use a multitouch touch screen PC for Android development ? I assume that this would work as the PC would recognize my fingers like the mouse, but I'd like to find out before purchasing the PC. Thanks for your help, Scott

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• SQL Server 2000 DTS Package Failing with "The number of failing rows exceeds the maximum specified"

  - by Scott McCormick

  I have inherited a SQL Server 2000 DTS package that migrates data from SQL Server to Oracle. This package moves about 20 tables' data to Oracle every night with no transformations, and it is then transformed by a set of SPs and used by a GIS application. Twice this week, during the migration between SQL Server and Oracle, the package has failed with "The number of failing rows exceeds the maximum specified". It has failed on a different table each time, though. Each time it's failed, we've rerun the process the next morning and it has worked. Because the process works the second time it's run, it makes me think the data is being changed by someone or something between the initial failure and our successful second run. I would like to change the DTS package to log the failing rows in a text document so we can compare them later. Can someone help me with that? I can't seem to figure that part out. Scott

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• Custom XAML property

  - by Scott Silvi

  Hey all - I've seen a library that allows me to do this inside my XAML, which sets the visibility of the control based on whether or not the user is in a role: s:Authorization.RequiresRole="Admin" Using that library with my database requires a bunch of coding that I can't really do right now. Ultimately here's what I want to know... I have received the authenticated users role from my SPROC, and its currently stored in my App.xaml.cs as a property (not necessary for the final solution, just FYI for now). I want to create a property (dependency property? attached property?) that allows me to say something very similar to what the other library has: RequiresRole="Admin", which would collapse the visibility if the user is not in the Admin role. Can anyone point me in the right direction on this? Thanks, Scott

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• How to target specific letter/word with jquery?

  - by Gal

  As a mere example, I want to apply the class "fancy" to all occurrences of the sign "&" in the document. The CSS: .fancy { font-style: italic; } So a text that looks like this: Ben & Jerry's would be manipulated by jquery to this: Ben <span class="fancy">&</span> Jerry's Is there a function to target specific words/phrases/letters like this?

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• How to merge two single column csv files with linux commands

  - by user1328191

  I was wondering how to merge two single column csv files into one file where the resulting file will contain two columns. file1.csv    first_name    chris    ben    jerry file2.csv    last_name    smith    white    perry result.csv    first_name,last_name    chris,smith    ben,white    jerry,perry Thanks

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• Combining Searchlogic named scopes with OR

  - by jaycode

  Is something like this possible? Product.price_greater_than(10000).or_tags_name_equals('luxury') The wiki doesn't help much on this... I saw in the wiki: User.id_or_age_lt_or_username_or_first_name_begins_with(10) => "id < 10 OR age < 10 OR username LIKE 'ben%' OR first_name like'ben%'" I really don't get that, how in the world did "ben" comes up??? could anyone help please?

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• Allowing the specific format of email address in MVC input

  - by user219315

  Hi I have a page in MVC where i want to take the email adddress as the input which can be of format like:"Jone Davi" <[email protected]>, "Ben Miller" <[email protected]>, "Jane Ton" <[email protected]>, Then from this I want to parse the valid emailaddress.But on click of the submit button getting error message" A potentially dangerous Request.Form value was detected from the client " Thus is there any way to take the input of email address in above format and bypass the security error for that specific page. Thanks in advance.

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• How can I forward ALL traffic over a site-to-site VPN on Cisco ASA?

  - by Scott Clements

  Hi There, I currently have two Cisco ASA 5100 routers. They are at different physical sites and are configured with a site-to-site VPN which is active and working. I can communicate with the subnets on either site from the other and both are connected to the internet, however I need to ensure that all the traffic at my remote site goes through this VPN to my site here. I know that the web traffic is doing so as a "tracert" confirms this, but I need to ensure that all other network traffic is being directed over this VPN to my network here. Here is my config for the ASA router at my remote site: hostname ciscoasa domain-name xxxxx enable password 78rl4MkMED8xiJ3g encrypted names ! interface Ethernet0/0 nameif NIACEDC security-level 100 ip address x.x.x.x 255.255.255.0 ! interface Ethernet0/1 description External Janet Connection nameif JANET security-level 0 ip address x.x.x.x 255.255.255.248 ! interface Ethernet0/2 shutdown no nameif security-level 100 no ip address ! interface Ethernet0/3 shutdown no nameif security-level 100 ip address dhcp setroute ! interface Management0/0 nameif management security-level 100 ip address 192.168.100.1 255.255.255.0 management-only ! passwd 2KFQnbNIdI.2KYOU encrypted ftp mode passive clock timezone GMT/BST 0 clock summer-time GMT/BDT recurring last Sun Mar 1:00 last Sun Oct 2:00 dns domain-lookup NIACEDC dns server-group DefaultDNS name-server 154.32.105.18 name-server 154.32.107.18 domain-name XXXX same-security-traffic permit inter-interface same-security-traffic permit intra-interface access-list ren_access_in extended permit ip any any access-list ren_access_in extended permit tcp any any access-list ren_nat0_outbound extended permit ip 192.168.6.0 255.255.255.0 192.168.3.0 255.255.255.0 access-list NIACEDC_nat0_outbound extended permit ip 192.168.12.0 255.255.255.0 192.168.3.0 255.255.255.0 access-list JANET_20_cryptomap extended permit ip 192.168.12.0 255.255.255.0 192.168.3.0 255.255.255.0 access-list NIACEDC_access_in extended permit ip any any access-list NIACEDC_access_in extended permit tcp any any access-list JANET_access_out extended permit ip any any access-list NIACEDC_access_out extended permit ip any any pager lines 24 logging enable logging asdm informational mtu NIACEDC 1500 mtu JANET 1500 mtu management 1500 icmp unreachable rate-limit 1 burst-size 1 asdm image disk0:/asdm-522.bin no asdm history enable arp timeout 14400 nat-control global (NIACEDC) 1 interface global (JANET) 1 interface nat (NIACEDC) 0 access-list NIACEDC_nat0_outbound nat (NIACEDC) 1 192.168.12.0 255.255.255.0 access-group NIACEDC_access_in in interface NIACEDC access-group NIACEDC_access_out out interface NIACEDC access-group JANET_access_out out interface JANET route JANET 0.0.0.0 0.0.0.0 194.82.121.82 1 route JANET 0.0.0.0 0.0.0.0 192.168.3.248 tunneled timeout xlate 3:00:00 timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02 timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00 timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00 timeout uauth 0:05:00 absolute http server enable http 192.168.12.0 255.255.255.0 NIACEDC http 192.168.100.0 255.255.255.0 management http 192.168.9.0 255.255.255.0 NIACEDC no snmp-server location no snmp-server contact snmp-server enable traps snmp authentication linkup linkdown coldstart crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac crypto ipsec transform-set ESP-AES-256-SHA esp-aes-256 esp-sha-hmac crypto map JANET_map 20 match address JANET_20_cryptomap crypto map JANET_map 20 set pfs crypto map JANET_map 20 set peer X.X.X.X crypto map JANET_map 20 set transform-set ESP-AES-256-SHA crypto map JANET_map interface JANET crypto isakmp enable JANET crypto isakmp policy 10 authentication pre-share encryption aes-256 hash sha group 2 lifetime 86400 crypto isakmp policy 30 authentication pre-share encryption 3des hash sha group 2 lifetime 86400 crypto isakmp policy 50 authentication pre-share encryption aes-256 hash sha group 5 lifetime 86400 tunnel-group X.X.X.X type ipsec-l2l tunnel-group X.X.X.X ipsec-attributes pre-shared-key * telnet timeout 5 ssh timeout 5 console timeout 0 dhcpd address 192.168.100.2-192.168.100.254 management dhcpd enable management ! ! class-map inspection_default match default-inspection-traffic ! ! policy-map type inspect dns preset_dns_map parameters message-length maximum 512 policy-map global_policy class inspection_default inspect dns preset_dns_map inspect ftp inspect h323 h225 inspect h323 ras inspect rsh inspect rtsp inspect esmtp inspect sqlnet inspect skinny inspect sunrpc inspect xdmcp inspect sip inspect netbios inspect tftp inspect http ! service-policy global_policy global prompt hostname context no asdm history enable Thanks in advance, Scott

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• ASP.NET PowerShell Impersonation

  - by Ben

  I have developed an ASP.NET MVC Web Application to execute PowerShell scripts. I am using the VS web server and can execute scripts fine. However, a requirement is that users are able to execute scripts against AD to perform actions that their own user accounts are not allowed to do. Therefore I am using impersonation to switch the identity before creating the PowerShell runspace: Runspace runspace = RunspaceFactory.CreateRunspace(config); var currentuser = WindowsIdentity.GetCurrent().Name; if (runspace.RunspaceStateInfo.State == RunspaceState.BeforeOpen) { runspace.Open(); } I have tested using a domain admin account and I get the following exception when calling runspace.Open(): 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: Requested registry access is not allowed. The web application is running in full trust and I have explicitly added the account I am using for impersonation to the local administrators group of the machine (even though the domain admins group was already there). I'm using advapi32.dll LogonUser call to perform the impersonation in a similar way to this post (http://blogs.msdn.com/webdav_101/archive/2008/09/25/howto-calling-exchange-powershell-from-an-impersonated-thead.aspx) Any help appreciated as this is a bit of a show stopper at the moment. Thanks Ben

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• UIView rotation, modal view lanscape and portrait, parent fails to render

  - by Ben

  Hi everyone, I've hit a bit of a roadblock with something that I hope that someone in here can help me out with. I'll describe the 'state of play' first, and then what the issue is, so here goes; I have a series of view controllers that are chained together with a Navigation Controller (this works just fine), All of these view controllers support portrait mode only (by design), In one of the view controllers (the 'end' one actually) the user can click a table cell to pop up a modal view controller (using presentModalViewController(...) of course) This modal view controller supports portrait and landscape modes (and this works), When the user clicks the 'Done' button on this modal view controller we pop and pass control back to the parent view controller, however; If the user is in portrait mode when they click 'Done' then the parent displays itself just fine, If the user is in landscape mode when they click 'Done' then the parent displays a totally white, blank screen (that covers the whole screen). It is as if the controller does not know how to render in landscape and just doesn't bother. I'd like to be able to have this parent view render in portrait no matter what the orientation of the phone is when the user clicks the 'Done' button. Various forum posts suggest using the UIDevice method 'setOrientation' (but this is undocumented and will get our app rejected apparently). Another suggestion was to set the 'statusBarOrientation' to portrait in the 'viewWillAppear' method but that had no effect. So I am a bit stuck! Has any encountered anything like this before? If need be I can provide code, if that will help anyone diagnose the problem for me. Thanks in advance! Cheers, Ben

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• VB.Net plugin using Matlab COM Automation Server...Error: 'Could not load Interop.MLApp'

  - by Ben

  My Problem: I am using Matlab COM Automation Server to call and execute matlab .m files from a VB.Net plugin for a CAD program called Rhino 3D. The code works flawlessly when set up as a simple Windows Application in Visual Studio, but when I insert it (and make the requisite reference) into my .Net plugin and test it in the CAD program I get the following error: "Could not load file or assembly 'Interop.MLApp, Version 1.0.0.0, culture=neutral, PublicKeyToken=null' or one of its dependencies. the system cannot find the file specified." What I've Tried: I am baffled as to why this occurs, but I was able to contact the CAD program's technical support staff and they suggested that it has something to do with their DotNet SDK having trouble with references that are located far outside the CAD program directory. They didn't have any solutions so I tried playing around with copylocal and this made no difference. I tried using other COM libraries and the Open Office automation server works fine, although uses url's instead of requiring a reference. I also tested Excel, which does require a reference, and it returned the error: "retrieving the COM class factory for component with CLSID {...} failed due to the following error: 80040154." This may or may not be related to the issue with the Matlab COM reference, but I thought was worthwhile to share. Perhaps is there another way to reference Interop.MLApp? I would appreciate any suggestions or thoughts on how I might make the Matlab Interop.MLApp reference work. Best regards, Ben

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• Singletons, thread safety and structuremap

  - by Ben

  Hi, Currently I have the following class: public class PluginManager { private static bool s_initialized; private static object s_lock = new object(); public static void Initialize() { if (!s_initialized) { lock (s_lock) { if (!s_initialized) { // initialize s_initialized = true; } } } } } The important thing here is that Initialize() should only be executed once whilst the application is running. I thought that I would refactor this into a singleton class since this would be more thread safe?: public sealed class PluginService { static PluginService() { } private static PluginService _instance = new PluginService(); public static PluginService Instance { get { return _instance; } } private bool s_initialized; public void Initialize() { if (!s_initialized) { // initialize s_initialized = true; } } } Question one, is it still necessary to have the lock here (I have removed it) since we will only ever be working on the same instance? Finally, I want to use DI and structure map to initialize my servcices so I have refactored as below: public interface IPluginService { void Initialize(); } public class NewPluginService : IPluginService { private bool s_initialized; public void Initialize() { if (!s_initialized) { // initialize s_initialized = true; } } } And in my registry: ForRequestedType<IPluginService>() .TheDefaultIsConcreteType<NewPluginService>().AsSingletons(); This works as expected (singleton returning true in the following code): var instance1 = ObjectFactory.GetInstance<IPluginService>(); var instance2 = ObjectFactory.GetInstance<IPluginService>(); bool singleton = (instance1 == instance2); So my next question, is the structure map solution as thread safe as the singleton class (second example). The only downside is that this would still allow NewPluginService to be instantiated directly (if not using structure map). Many thanks, Ben

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• C# Application Calling Powershell Script Issues

  - by Ben

  Hi, I have a C# Winforms application which is calling a simple powershell script using the following method: Process process = new Process(); process.StartInfo.FileName = @"powershell.exe"; process.StartInfo.Arguments = String.Format("-noexit \"C:\Develop\{1}\"", scriptName); process.Start(); The powershell script simply reads a registry key and outputs the subkeys. $items = get-childitem -literalPath hklm:\software foreach($item in $items) { Write-Host $item } The problem I have is that when I run the script from the C# application I get one set of results, but when I run the script standalone (from the powershell command line) I get a different set of results entirely. The results from running from the c# app are: HKEY_LOCAL_MACHINE\software\Adobe HKEY_LOCAL_MACHINE\software\Business Objects HKEY_LOCAL_MACHINE\software\Helios HKEY_LOCAL_MACHINE\software\InstallShield HKEY_LOCAL_MACHINE\software\Macrovision HKEY_LOCAL_MACHINE\software\Microsoft HKEY_LOCAL_MACHINE\software\MozillaPlugins HKEY_LOCAL_MACHINE\software\ODBC HKEY_LOCAL_MACHINE\software\Classes HKEY_LOCAL_MACHINE\software\Clients HKEY_LOCAL_MACHINE\software\Policies HKEY_LOCAL_MACHINE\software\RegisteredApplications PS C:\Develop\RnD\SiriusPatcher\Sirius.Patcher.UI\bin\Debug When run from the powershell command line I get: PS M: C:\Develop\RegistryAccess.ps1 HKEY_LOCAL_MACHINE\software\ATI Technologies HKEY_LOCAL_MACHINE\software\Classes HKEY_LOCAL_MACHINE\software\Clients HKEY_LOCAL_MACHINE\software\Equiniti HKEY_LOCAL_MACHINE\software\Microsoft HKEY_LOCAL_MACHINE\software\ODBC HKEY_LOCAL_MACHINE\software\Policies HKEY_LOCAL_MACHINE\software\RegisteredApplications HKEY_LOCAL_MACHINE\software\Wow6432Node PS M: The second set of results match what I have in the registry, but the first set of results (which came from the c# app) don't. Any help or pointers would be greatly apreciated :) Ben

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• Building Cross Platform app - recommendation

  - by Ben

  Hi, I need to build a fairly simple app but it needs to work on both PC and Mac. It also needs to be redistributable on a disc or usb drive as a standalone desktop app. Initially I thought AIR would be perfect for this (it ticks all the API requirements), but the difficulty is making it distributable, as the app would require the AIR runtime to be installed to run. I came across Shu Player as an option as it seems to be able to package the AIR runtime with the app and do a (silent?) install. However this seems to break the T&C from Adobe (as outlined here) so I'm not sure about the legality. Another option could be Zinc but I haven't tested it so I'm not sure how well it'll fit the bill. What would you recommend or suggest I check out? Any suggestion much appreciated EDIT: There's a few more discussions on mono usage (though no real conclusion): Here and Here EDIT2: Titanium could also fit the bill maybe, will check it out. Any more comments from anyone? Ben

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• How can I implement NHibernate session per request without a dependency on NHibernate?

  - by Ben

  I've raised this question before but am still struggling to find an example that I can get my head around (please don't just tell me to look at the S#arp Architecture project without at least some directions). So far I have achieved near persistance ignorance in my web project. My repository classes (in my data project) take an ISession in the constructor: public class ProductRepository : IProductRepository { private ISession _session; public ProductRepository(ISession session) { _session = session; } In my global.asax I expose the current session and am creating and disposing session on beginrequest and endrequest (this is where I have the dependency on NHibernate): public static ISessionFactory SessionFactory = CreateSessionFactory(); private static ISessionFactory CreateSessionFactory() { return new Configuration() .Configure() .BuildSessionFactory(); } protected MvcApplication() { BeginRequest += delegate { CurrentSessionContext.Bind(SessionFactory.OpenSession()); }; EndRequest += delegate { CurrentSessionContext.Unbind(SessionFactory).Dispose(); }; } And finally my StructureMap registry: public AppRegistry() { For<ISession>().TheDefault .Is.ConstructedBy(x => MvcApplication.SessionFactory.GetCurrentSession()); For<IProductRepository>().Use<ProductRepository>(); } It would seem I need my own generic implementations of ISession and ISessionFactory that I can use in my web project and inject into my repositories? I'm a little stuck so any help would be appreciated. Thanks, Ben

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• unordered lists as columns

  - by Ben

  I am trying to use unordered lists as columns something setup like the following: <ul> <li>word 1</li> <li>word 1</li> <li>word 1</li> <li>word 1</li> <li>word 1</li> </ul> <ul> <li>word 2</li> <li>word 2</li> <li>word 2</li> <li>word 2</li> <li>word 2</li> </ul> What would I need to do as far as css these to lineup side by side as vertical lists with no bullets. I'm sure I'm missing something simple but I can't seem to figure it out. I specifically need this to work in IE7. Thanks in advance, Ben

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• ASP.NET MembershipProvider and StructureMap

  - by Ben

  I was using the default AspNetSqlMembershipProvider in my application. Authentication is performed via an AuthenticationService (since I'm also supporting other forms of membership like OpenID). My AuthenticationService takes a MembershipProvider as a constructor parameter and I am injecting the dependency using StructureMap like so: For<MembershipProvider>().Use(Membership.Provider); This will use the MembershipProvider configured in web.config. All this works great. However, now I have rolled my own MembershipProvider that makes use of a repository class. Since the MembershipProvider isn't exactly IoC friendly, I added the following code to the MembershipProvider.Initialize method: _membershipRepository = ObjectFactory.GetInstance<IMembershipRepository>(); However, this raises an exception, like StructureMap hasn't been initialized (cannot get instance of IMembershipRepository). However, if I remove the code and put breakpoints at my MembershipProvider's initialize method and my StructureMap bootstrapper, it does appear that StructureMap is configured before the MembershipProvider is initialized. My only workaround so far is to add the above code to each method in the MembershipProvider that needs the repository. This works fine, but I am curious as to why I can't get my instance in the Initialize method. Is the MembershipProvider performing some internal initialization that runs before any of my own application code does? Thanks Ben

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• Querying a self referencing join with NHibernate Linq

  - by Ben

  In my application I have a Category domain object. Category has a property Parent (of type category). So in my NHibernate mapping I have: <many-to-one name="Parent" column="ParentID"/> Before I switched to NHibernate I had the ParentId property on my domain model (mapped to the corresponding database column). This made it easy to query for say all top level categories (ParentID = 0): where(c => c.ParentId == 0) However, I have since removed the ParentId property from my domain model (because of NHibernate) so I now have to do the same query (using NHibernate.Linq) like so: public IList<Category> GetCategories(int parentId) { if (parentId == 0) return _catalogRepository.Categories.Where(x => x.Parent == null).ToList(); else return _catalogRepository.Categories.Where(x => x.Parent.Id == parentId).ToList(); } The real impact that I can see, is the sql generated. Instead of a simple 'select x,y,z from categories where parentid = 0' NHibernate generates a left outer join: SELECT this_.CategoryId as CategoryId4_1_, this_.ParentID as ParentID4_1_, this_.Name as Name4_1_, this_.Slug as Slug4_1_, parent1_.CategoryId as CategoryId4_0_, parent1_.ParentID as ParentID4_0_, parent1_.Name as Name4_0_, parent1_.Slug as Slug4_0_ FROM Categories this_ left outer join Categories parent1_ on this_.ParentID = parent1_.CategoryId WHERE this_.ParentID is null Which doesn't seems much less efficient that what I had before. Is there a better way of querying these self referencing joins as it's very tempting to drop the ParentID back onto my domain model for this reason. Thanks, Ben

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• Access custom error messages for InArray validator when using Zend_Form_Element_Select

  - by Ben Waine

  Hello, I'm using Zend Framework 1.62 (becuase we are deploying the finished product to a Red Hat instance, which doesn't have a hgih enough PHP version to support ZF1.62). When creating a Form using Zend Form, I add a select element, add some multi options. I use the Zend Form as an in-object validation layer, passing an objects values through it and using the isValid method to determine if all the values fall within normal parameters. Zend_Form_Element_Select works exactly as expected, showing invalid if any other value is input other than one of the multi select options I added. The problem comes when I want to display the form at some point, I cant edit the error message created by the pre registered 'InArray' validator added automatically by ZF. I know I can disable this behaviour, but it works great apart from the error messages. I've tryed the following: $this->getElement('country')->getValidator('InArray')->setMessage('The country is not in the approved lists of countries'); // Doesn't work at all. $this->getElement('country')->setErrorMessage('The country is not in the approved lists of countries'); // Causes a conflict elswhere in the application and doesnt allow granular control of error messages. Anyone have any ideas? Ben

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• Problem with WPF Data Binding Defined in Code Not Updating UI Elements

  - by Ben

  I need to define new UI Elements as well as data binding in code because they will be implemented after run-time. Here is a simplified version of what I am trying to do. Data Model: public class AddressBook : INotifyPropertyChanged { private int _houseNumber; public int HouseNumber { get { return _houseNumber; } set { _houseNumber = value; NotifyPropertyChanged("HouseNumber"); } } public event PropertyChangedEventHandler PropertyChanged; protected void NotifyPropertyChanged(string sProp) { if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(sProp)); } } } Binding in Code: AddressBook book = new AddressBook(); book.HouseNumber = 123; TextBlock tb = new TextBlock(); Binding bind = new Binding("HouseNumber"); bind.Source = book; bind.Mode = BindingMode.OneWay; tb.SetBinding(TextBlock.TextProperty, bind); // Text block displays "123" myGrid.Children.Add(tb); book.HouseNumber = 456; // Text block displays "123" but PropertyChanged event fires When the data is first bound, the text block is updated with the correct house number. Then, if I change the house number in code later, the book's PropertyChanged event fires, but the text block is not updated. Can anyone tell me why? Thanks, Ben

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• Create a SSL certificate on Windows

  - by Ben Fransen

  Hi all, Since I'm very new to SSL certificates, and the creation and usage of them I figured maybe StackOverflow members can help me out. I'm from Holland, the common way of online payments is by implementing iDEAL. An online payment protocol supported by the major banks. I have to implement a 'professional' version. This includes creating a RSA private key. Based on that key I have to create a certificate and upload it to the webserver. I'm on a Windows machine and completely confused what to do. I took a look at the OpenSSL website, because the manual forwarded me to that website to get a SSL Toolkit. The manual provides two commands which have to be executed in order to create a RSA key and a certificate. The commands are: openssl genrsa -des3 –out priv.pem -passout pass:myPassword 1024 and openssl req -x509 -new -key priv.pem -passin pass:myPassword -days 3650 -out cert.cer Is there a way I can do this by a utility on a windows machine? I've downloaded PuTTy KeyGenerator. But I'm not sure what to do, I've created a key (SSH-2 RSA, whatever that is..) but how do I create a certificate with that key? Any help is much appreciated! Ben

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• Is Structuremap singleton thread safe?

  - by Ben

  Hi, Currently I have the following class: public class PluginManager { private static bool s_initialized; private static object s_lock = new object(); public static void Initialize() { if (!s_initialized) { lock (s_lock) { if (!s_initialized) { // initialize s_initialized = true; } } } } } The important thing here is that Initialize() should only be executed once whilst the application is running. I thought that I would refactor this into a singleton class since this would be more thread safe?: public sealed class PluginService { static PluginService() { } private static PluginService _instance = new PluginService(); public static PluginService Instance { get { return _instance; } } private bool s_initialized; public void Initialize() { if (!s_initialized) { // initialize s_initialized = true; } } } Question one, is it still necessary to have the lock here (I have removed it) since we will only ever be working on the same instance? Finally, I want to use DI and structure map to initialize my servcices so I have refactored as below: public interface IPluginService { void Initialize(); } public class NewPluginService : IPluginService { private bool s_initialized; public void Initialize() { if (!s_initialized) { // initialize s_initialized = true; } } } And in my registry: ForRequestedType<IPluginService>() .TheDefaultIsConcreteType<NewPluginService>().AsSingletons(); This works as expected (singleton returning true in the following code): var instance1 = ObjectFactory.GetInstance<IPluginService>(); var instance2 = ObjectFactory.GetInstance<IPluginService>(); bool singleton = (instance1 == instance2); So my next question, is the structure map solution as thread safe as the singleton class (second example). The only downside is that this would still allow NewPluginService to be instantiated directly (if not using structure map). Many thanks, Ben

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• In C#, what thread will Events be handled in?

  - by Ben

  Hi, I have attempted to implement a producer/consumer pattern in c#. I have a consumer thread that monitors a shared queue, and a producer thread that places items onto the shared queue. The producer thread is subscribed to receive data...that is, it has an event handler, and just sits around and waits for an OnData event to fire (the data is being sent from a 3rd party api). When it gets the data, it sticks it on the queue so the consumer can handle it. When the OnData event does fire in the producer, I had expected it to be handled by my producer thread. But that doesn't seem to be what is happening. The OnData event seems as if it's being handled on a new thread instead! Is this how .net always works...events are handled on their own thread? Can I control what thread will handle events when they're raised? What if hundreds of events are raised near-simultaneously...would each have its own thread? Thank in advance! Ben

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