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• Language Agnostic Basic Programming Question

  - by Rachel

  This is very basic question from programming point of view but as I am in learning phase, I thought I would better ask this question rather than having a misunderstanding or narrow knowledge about the topic. So do excuse me if somehow I mess it up. Question: Let's say I have class A,B,C and D now class A has some piece of code which I need to have in class B,C and D so I am extending class A in class B, class C, and class D Now how can I access the function of class A in other classes, do I need to create an object of class A and than access the function of class A or as am extending A in other classes than I can internally call the function using this parameter. If possible I would really appreciate if someone can explain this concept with code sample explaining how the logic flows. Note Example in Java, PHP and .Net would be appreciated.

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• httpclient ssl certificate on android

  - by Mojo Risin

  Hi all I have some troubles with ssl using httpclient on android i am trying to access public trusted certificate in details i want my app to trust all certificates. First i tried using this guide http://hc.apache.org/httpclient-3.x/sslguide.html on Desktop is working fine but on android i still got javax.net.ssl.SSLException: Not trusted server certificate. After searching in google i found some other examples how to enable ssl. http://groups.google.com/group/android-developers/browse_thread/thread/62d856cdcfa9f16e - Working when i use URLConnection but with HttpClient still got the exception. http://www.discursive.com/books/cjcook/reference/http-webdav-sect-self-signed.html - on Desktop using jars from apache is working but in android using included in SDK classes can't make it work. So any ideas how can i access trust public certificates on android using HttpClient

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• TestContext is null

  - by Budda

  Pretty simple test: [TestClass] public class MyTestClass { private TestContext _testContext; protected TestContext TestContext { get { return _testContext; } set { _testContext = value; } } [TestMethod] [HostType("ASP.NET")] [UrlToTest("http://localhost/MyPage.aspx")] public void TestMyPage() { Assert.IsNotNull(TestContext); } } Fails... Now I am using VS2008 Development edition. Is there any possibility to fix this? Or I need to have a Test (or Team Suite) edition? Thanks. P.S. Access to TestContext object is required to have access to it's RequestedPage property

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• LINQ To SQL ignore unique constraint exception and continue

  - by Martin

  I have a single table in a database called Users Users ------ ID (PK, Identity) Username (Unique Index) I have setup a unique index on the Username table to prevent duplicates. I am then enumerating through a collection and creating a new user in the database for each item. What I want to do is just insert a new user and ignore the exception if the unique key constraint is violated (as it's clearly a duplicate record in that case). This is to avoid having to craft where not exists kind of queries. First off, is this going to be any more efficient or should my insert code be checking for duplicates instead? I'm drawn more to the database having that logic as this prevents any other type of client from inserting duplicate data. My other issue is related to LINQ To SQL. I have the following code: public class TestRepo { DatabaseDataContext database = new DatabaseDataContext(); public void Add(string username) { database.Users.InsertOnSubmit(new User() { Username = username }); } public void Save() { database.SubmitChanges(); } } And then I iterate over a collection and insert new users, ignoring any exceptions: TestRepo repo = new TestRepo(); foreach (var name in new string[] { "Tim", "Bob", "John" }) { try { repo.Add(name); repo.Save(); } catch { } } The first time this is run, great I have three users in the table. If I remove the second one and run this code again, nothing is inserted. I expected the first insert to fail with the exception, the second to succeed (as I just removed that item from the DB) and the third to then fail. What seems to be happening is that once the SqlException is thrown (even though the loop continues to iterate) all of the next inserts fail - even when there isn't a row in the table that would cause a unique violation. Can anyone explain this? P.S. The only workaround I could find was to instantiate the repo each time before the insert, then it worked exactly as excepted - indicating that it's something to do with the LINQ To SQL DataContext. Thanks.

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• How to list column headers of a SQL Server table using sp_help perhaps?

  - by Hamish Grubijan

  Hi, I have a few tables with 70-80 columns in them. I would like to populate them with somewhat random data, unless I will not be able to do so due to key violation, etc. The first step would be simply to get the list of all headers. There seem to be two ways: A) Run select * from table_of_interest; in MSFT SQL Server Management Studio 2008. Now, right-click the result and click "Copy With headers". However, I get zero rows back, and when I try to copy nothing + headers, I get: TITLE: Microsoft SQL Server Management Studio ------------------------------ Value cannot be null. Parameter name: data (System.Windows.Forms) ------------------------------ BUTTONS: OK ------------------------------ This looks like a bug ... anyhow ... there is another way. B) I can run sp_help table_of_interest;. However, I end up getting too much back. I get 7 different tables back but I am only interested in the second one. The columns of the second table are: Column_name | Type | Computed | Length | Prec | Scale | Nullable | TrimTrailingBlanks | FixedLenNullInSource | Collation I might be interested in just a Column_name and Type, but maybe other columns. So ... since sp_help probably runs a bunch of queries ... how do I get under the hood? How can I run the second query AND filter down the number of columns that I am interested in? Many Thanks!

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• Firefox Password script same PW auto login for 1000s devices Possible to use greasemonkey

  - by ritztech

  I currently work in a position that i have to manage and access 1000s of pages for troubleshooting and new setup.... and im trying to figure out a way for firefox or chrome to setup ANYtime it sees for instance a a web based page for equipment like (CISCO, Linksys, Sonicwall, T1 controllers) from the manufacture in the Title bar or from the originating page place a set up 2 - 3 passwords to auto log on with. 1st one of course being the most common so it logs in faster.. I access about 14 different web based products with passwords tied to each of them and if someway i can grab info stating that hey this company is cisco/sonicwall/linksys/hp/ log on with these set of 3-5 credintials. Using possible If then statements.... is that hard i saw some script files but not sure if its difficult because some apps use the MSG BOX built in feature and some use the form submit method built on the page unless i can have 2 different grease monkey scripts at the same time.... thanks.

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• Nested class - calling the nested class from the parent class

  - by insanepaul

  I have a class whereby a method calls a nested class. I want to access the parent class properties from within the nested class. public class ParentClass { private x; private y; private z; something.something = new ChildClass public class ChildClass { need to get x, y and z; } } How do I access x,y and z from within the child class. Something to do with referencing the parent class but how? }

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• Accessing Squid Proxy over internet

  - by prateekdayal

  Hi, I recently finished installing Squid on a VPS I have in the US and its working fine locally (I verified by setting http_proxy variable and using lynx). I want to access this proxy over the internet (as an anonymizer) so that I can see how some ads show up for US traffic on my website. I have setup authentication so abuse is not a problem. However, I am not able to access the proxy over the internet. I have set the following rule in squid.conf http_access allow all Is this not possible to do what I want or I am missing something? The port 3128 is open in the firewall so that is not an issue. Squid is running on 0.0.0.0 Thanks Prateek

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• Communicate with the local machine from a web page

  - by Earlz

  Hello. We have a web application. There are physical devices that we need to be able to communicate with, and we have access to all of our clients computers to install whatever software we need. Now, for the question: Is there a way to make this browser-agnostic? As in, not requiring ActiveX controls? One of my ideas was to install a custom made webserver on each client and then have javascript on our webpage that communicates with that webserver. This could be done by the same way that http://earlz.biz.tm javascript can access subdomains assigned to 127.0.0.1 such as http://loopback.earlz.biz.tm The problem with this of course is that the client's custom made webserver would be forced to run on port 80(which will have conflicts at least sometimes), or we would have to use a nonstandard port for our web application, which is quite undesirable. Does anyone else have ideas on how to do this?

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• ASP.NET MVC: AuthorizeAttribute on default page

  - by AlexB

  The default controller in my ASP.NET MVC project is decorated with the [Authorize] attribute. When I deploy the website on my development machine and access the website, I am redirected to the login page (defined in forms loginUrl section of the Web.Config). Result: everything works as expected. When I publish the website on our production server (Windows Server 2008, IIS 7, DefaultAppPool) and access the website, the expected address shows in the address bar (/Account/LogOn?ReturnUrl=*my_expected_return_url*), but the page displays "You do not have permission to view this directory or page." instead of the login page. If I remove the [Authorize] attribute on the default controller/action, the page displays correctly. My Web.Config file: sessionState mode="InProc" timeout="30" authentication mode="Forms" forms loginUrl="~/Account/LogOn" timeout="2880"

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• URL rewriting with mod_rewrite

  - by Steven

  The web server is Apache. I want to rewrite URL so a user won't know the actual directory. For example: The original URL: www.mydomainname.com/en/piecework/piecework.php?piecework_id=11 Expected URL: piecework.mydomainname.com/en/11 I added the following statements in .htaccess: RewriteCond %{HTTP_HOST} ^(?!www)([^.]+)\.mydomainname\.com$ [NC] RewriteRule ^(w+)/(\d+)$ /$1/%1/%1.php?%1_id=$2 [L] Of course I replaced mydomainname with my domain name. .htaccess is placed in the site root, but when I access piecework.mydomainname.com/en/11, I got "Object not found".(Of course I replaced mydomainname with my domain name.) I added the following statements in .htaccess: RewriteRule ^/(.*)/en/piecework/(.*)piecework_id=([0-9]+)(.*) piecework.mydomainname.com/en/$3 Of course I replaced mydomainname with my domain name. .htaccess is placed in the site root, but when I access piecework.mydomainname.com/en/11, I got "Object not found".(Of course I replaced mydomainname with my domain name.) What's wrong?

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• Deploying xbap in a full trust mode

  - by SituStarz

  I have xbap which needs to run on a full trust mode because my application needs to upload a file from the client machine to process. I have to provide a installation steps to install. If i do it as a click one instillation, do i still get a security error? If so what is the best way to resolve it? If i install it in remote server, I saw couple of options in internet like creating certificates and ask user to import this certificate. Other option is to ask the user to allow access to xbap applications which provides access to all xbap applications (not so good). what is best way? It would be really great, if some could provide me the installation steps for both scenarios.

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• paypal API in VB.net

  - by StealthRT

  Hey all, i have converted some C# PayPal API Code over to VB.net. I have added that code to a class within my project but i can not seem to access it: Imports System Imports com.paypal.sdk.services Imports com.paypal.sdk.profiles Imports com.paypal.sdk.util Namespace GenerateCodeNVP Public Class GetTransactionDetails Public Sub New() End Sub Public Function GetTransactionDetailsCode(ByVal transactionID As String) As String Dim caller As New NVPCallerServices() Dim profile As IAPIProfile = ProfileFactory.createSignatureAPIProfile() profile.APIUsername = "xxx" profile.APIPassword = "xxx" profile.APISignature = "xxx" profile.Environment = "sandbox" caller.APIProfile = profile Dim encoder As New NVPCodec() encoder("VERSION") = "51.0" encoder("METHOD") = "GetTransactionDetails" encoder("TRANSACTIONID") = transactionID Dim pStrrequestforNvp As String = encoder.Encode() Dim pStresponsenvp As String = caller.[Call](pStrrequestforNvp) Dim decoder As New NVPCodec() decoder.Decode(pStresponsenvp) Return decoder("ACK") End Function End Class End Namespace I am using this to access that class: Private Sub cmdGetTransDetail_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdGetTransDetail.Click Dim thereturn As String thereturn =GetTransactionDetailsCode("test51322") End Sub But it keeps telling me: Error 2 Name 'GetTransactionDetailsCode' is not declared. I'm new at calling classes in VB.net so any help would be great! :o) David

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• SQL Server deadlocks between select/update or multiple selects

  - by RobW

  All of the documentation on SQL Server deadlocks talks about the scenario in which operation 1 locks resource A then attempts to access resource B and operation 2 locks resource B and attempts to access resource A. However, I quite often see deadlocks between a select and an update or even between multiple selects in some of our busy applications. I find some of the finer points of the deadlock trace output pretty impenetrable but I would really just like to understand what can cause a deadlock between two single operations. Surely if a select has a read lock the update should just wait before obtaining an exclusive lock and vice versa? This is happening on SQL Server 2005 not that I think this makes a difference.

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• C# Enterprise Block Application Settings and Settings.Settings designer

  - by Tab

  I am working with v4 of the Enterprise Application block and I am trying to learn how to access the Application Settings that I have added using the Enterprise Library Configuration tool. It's as if the code does not recognize the settings even though I can see them in the app.config. I DO have a Settings.Settings designer added and I CAN get to those settings the standard way even though the settings added in that designer do NOT show up in the app.config like they normally would if I am NOT using the Enterprise Block How do I access the App Settings that I added with the Enterprise Block?

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• How to handle Booleans/CheckBoxes in ASP.NET MVC 2 with DataAnnotations?

  - by asp_net

  I've got a view model like this: public class SignUpViewModel { [Required(ErrorMessage = "Bitte lesen und akzeptieren Sie die AGB.")] [DisplayName("Ich habe die AGB gelesen und akzeptiere diese.")] public bool AgreesWithTerms { get; set; } } The view markup code: <%= Html.CheckBoxFor(m => m.AgreesWithTerms) %> <%= Html.LabelFor(m => m.AgreesWithTerms)%> The result: No validation is executed. That's okay so far because bool is a value type and never null. But even if I make AgreesWithTerms nullable it won't work because the compiler shouts "Templates can be used only with field access, property access, single-dimension array index, or single-parameter custom indexer expressions." So, what's the correct way to handle this?

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• Problems with Castle DynamicProxy2 on .Net 3.5 SP1 on Win2003 Server

  - by Andrea Balducci

  I've an mvc + nh asp.net application. On my dev machine (win 7 Ent) all works fine, if deployed on a Win 2k3 (tried 2 different vm and one phisical machine) I got the following error.. anyone can help? Cannot explain this issue (tried the same build, so i think it'a machine configuration issue).. Derived method 'set_ID' in type 'CustomerProxy75950979a2a048e889584c21696f7f1b' from assembly 'DynamicProxyGenAssembly2, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' cannot reduce access [TypeLoadException: Derived method 'set_ID' in type 'CustomerProxy75950979a2a048e889584c21696f7f1b' from assembly 'DynamicProxyGenAssembly2, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' cannot reduce access.] System.Reflection.Emit.TypeBuilder._TermCreateClass(Int32 handle, Module module) +0 System.Reflection.Emit.TypeBuilder.CreateTypeNoLock() +915 System.Reflection.Emit.TypeBuilder.CreateType() +108 Castle.DynamicProxy.Generators.Emitters.AbstractTypeEmitter.BuildType() +48 Castle.DynamicProxy.Generators.ClassProxyGenerator.GenerateCode(Type[] interfaces, ProxyGenerationOptions options) +3821 Castle.DynamicProxy.DefaultProxyBuilder.CreateClassProxy(Type classToProxy, Type[] additionalInterfacesToProxy, ProxyGenerationOptions options) +84 Castle.DynamicProxy.ProxyGenerator.CreateClassProxy(Type classToProxy, Type[] additionalInterfacesToProxy, ProxyGenerationOptions options, Object[] constructorArguments, IInterceptor[] interceptors) +92 Castle.DynamicProxy.ProxyGenerator.CreateClassProxy(Type classToProxy, Type[] additionalInterfacesToProxy, IInterceptor[] interceptors) +21 NHibernate.ByteCode.Castle.ProxyFactory.GetProxy(Object id, ISessionImplementor session) +283

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• Is Interop.Domino dll thread safe ?

  - by anup-24

  Hi , I am using Interop.Domino dll version 1.2 in c# application, and using multithreading to access multiple NSF file at same time by creating new session for each thread created (Max 5 threads at a time). For the large NSF files, I was getting the Notes error like memory segment overflow. To overcome this problem, i used Marshal.ReleaseComObject(object) to release the necessary Notesdocument, and NotesView object where ever possible. Now, the issues is like, i am able to access 2 NSF files but the rest threads are going in dll exceptions as few Notes object are getting null. Kindly provide me some help.... Thanks for help.

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• Exposing a pointer in Boost.Python

  - by Goose Bumper

  I have this very simple C++ class: class Tree { public: Node *head; }; BOOST_PYTHON_MODULE(myModule) { class_<Tree>("Tree") .def_readwrite("head",&Tree::head) ; } I want to access the head variable from Python, but the message I see is: No to_python (by-value) converter found for C++ type: Node* From what I understand, this happens because Python is freaking out because it has no concept of pointers. How can I access the head variable from Python? I understand I should use encapsulation, but I'm currently stuck with needing a non-encapsulation solution.

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• The LoadLibraryA method returns error code 1114 (ERROR_DLL_INIT_FAILED) after more than 1000 cycles

  - by Javier

  Hi, I'm programing on C++, I'm using Visual Studio 2008, Windows XP, and I have the following problem: My application, that is a DLL that can be used from Python, loads an external dll, uses the required methods, and then unloads this external Dll. It's working properly, but after more than 1000 cycles the method "LoadLibraryA" returns a NULL reference. The main steps are: HINSTANCE h = NULL; h = LoadLibraryA(dllfile.c_str()); DWORD dw = GetLastError(); The error got is: ERROR_DLL_INIT_FAILED 1114 (0x45A) A dynamic link library (DLL) initialization routine failed. The Dll is unloaded by using the following: FreeLibrary(mDLL); mDLL = NULL; Where mDLL is defined like this: HINSTANCE mDLL; First alternative tried: Just load the Dll only once, and unloaded it when the application ends. This fix the problem but introduces a new one. When the application ends, instead of first executing the DllMain method of my applicaion, wich unloads the external DLL, is executing first the DllMain method of the other Dll. This cause the following error because my application is trying to unload a Dll that was unload by itself previously. "Unhandled exception at 0x04a00d07 (DllName.DLL) in Python.exe: 0xC0000005: Access violation reading location 0x0000006b". Any suggestion will be welcomed. Thanks in advance. Regards.

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• What is the most simple implementation of IDynamicMetaObjectProvider?

  - by Néstor Sánchez A.

  Hi, I have this scenario... 1.- I'm providing a "Dynamic Table" for wich users can define Fields. Each Dynamic Table will have as many rows/records as needed, but the Field definitions are centralized. 2.- My Dynamic Row/Record class was inherited from the .NET DLR DynamicObject class, and the underlying storage was a List appropriately associated to the defining fields. Everything works fine! BUT... 3.- Because I need to Serialize the content, and DynamicObject is not Serializable, I was forced to generate and carry a Dynamic Object when dynamic member access is required. But this is ugly and redundant. So, I need to implement IDynamicMetaObjectProvider myself to achieve dynamic access and serialization together. After googling/binging unsuccessfully I ask for your help... Can anybody please give a good example (or related link) for doing that?

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• Hosted Mac OS X/iPhone development

  - by dwj

  I want to try my hand at developing for the iPhone but I don't have an Intel-based Mac available to me; likewise, my budget doesn't include provisions for getting one anytime soon. I've tried messing around with winchain and that hasn't gone too well. I'm not interested in jail-breaking my phone and installing other tools for developing. I've read posts on using older macs with the development tool-kit but haven't tried it yet. In the end I just want to know I can compile without doing a ton of extra work or finding work-arounds. I don't mind only having access to a CLI compiler. Does anyone know of a hosting service that provides a shell access account on Intel-based Mac OS X machines?

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• PHP Filter, how to filter input array

  - by esryl

  I am using PHP filter to perfom basic sanitization and validation of form data. The principle problem I am having is that I mark my form up so that all the data is in one array for the POST input. e.g. form fields, page[name], page[slug], page[body], page[status], etc. Using the following: filter_input(INPUT_POST, 'page[name]', FILTER_SANITIZE_STRING); OR filter_input(INPUT_POST, "page['name']", FILTER_SANITIZE_STRING); I am unable to access the variable. Can someone please tell me the correct name to use to access array data using filter_input()

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• CVS server configuration

  - by Eugene

  I have a CVS repository on Freebsd and a ssh access. When I use putty client connection is ok. CVSROOT=:/labs/cvs CVS_RSH=ssh But when I try to do checkout with TortoiseCVS CVSROOT :ext:root@server:/labs/cvs error occurs: cvs commit: warning: unrecognized response Access denied' from cvs server cvs commit: warning: unrecognized responseNo supported authentication methods left to try!' from cvs server cvs [commit aborted]: end of file from server (consult above messages if any) Error, CVS operation failed What's wrong? What must I do for successful checkout?

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• How do I unescape HTML entities in a string in Python 3.1?

  - by Sho Minamimoto

  I have looked all around and only found solutions for python 2.6 and earlier, NOTHING on how to do this in python 3.X. (I only have access to Win7 box.) I HAVE to be able to do this in 3.1 and preferably without external libraries. Currently, I have httplib2 installed and access to command-prompt curl (that's how I'm getting the source code for pages). Unfortunately, curl does not decode html entities, as far as I know, I couldn't find a command to decode it in the documentation. YES, I've tried to get Beautiful Soup to work, MANY TIMES without success in 3.X. If you could provide EXPLICIT instructions on how to get it to work in python 3 in MS Windows environment, I would be very grateful. So, to be clear, I need to turn strings like this: Suzy &amp; John into a string like this: "Suzy & John".

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