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• API to determine whether running on iPhone or iPad

  - by Eric

  Is there an API for checking at runtime whether you are running on an iPhone or an iPad? One way I can think of would be to use: [[UIDevice currentDevice] model]; And detect the existence of the string @"iPad" - which seems a bit fragile. In the 3.2 SDK, I see that UIDevice also has a property which is really what I'm looking for, but doesn't work for pre-3.2 (obviously): [[UIDevice currentDevice] userInterfaceIdiom]; Are there other ways than checking for the existence of @"iPad" for a universal app?

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• VBA form_error vs on error

  - by dmr

  I am trying to set up error handling for a MS-Access application. The standard method to do this seems to be with an On Error statement in each subroutine/function. It seems simpler to me to use the Form_Error function to catch all the runtime errors in that form as opposed to an On Error statement for each sub/function called by an event on that form. (Obviously, for code in modules, there is no Form_Error function and therefore the only method is the On Error statement) What are the pros and cons of using On Error vs Form_Error?

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• JList not showing items or showing selectively.

  - by Avrahamshuk

  I have a Java Swing application using a JList to show some data from a DB. I am using DefaulListModel as the data model for the list in this way: void PopulateSoldiersList() { try { soldiersListModel = new DefaultListModel(); for (Soldier i : myBackEnd.GetAllSoldiers()) { soldiersListModel.addElement(i); } this.listSoldiers.setModel(soldiersListModel); } catch (Exception ex) {// Error Message} } And for some reason, the list just stays empty... I even did make sure at runtime that all the data is set up properly in the data model and even in the "dataModel" property of the JList! In other place at the app i have a similar problem, but there, sometimes the list show few items from the model (but not all of them) I have no idea where to go from here... please help. Thanks!

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• C# 4.0 dynamics

  - by mehanik

  Hi. Code bellow is working well until I have class ClassSameAssembly in same assembly as class Program. But when I move class ClassSameAssembly to separate assembly I have runtime error. Is it posible to resolve it? using System; namespace ConsoleApplication2 { public static class ClassSameAssembly { public static dynamic GetValues() { return new { Name = "Michael", Age = 20 }; } } internal class Program { private static void Main(string[] args) { var d = ClassSameAssembly.GetValues(); Console.WriteLine("{0} is {1} years old", d.Name, d.Age); } } }

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• Publish Website

  - by coffeeaddict

  I've published my website many times. But didn't think about this though until I came across this issue. So I decided to publish my WAP project to a local folder on my C drive first. Then used FTP to upload it to my shared host on discountasp.net. I noticed during runtime that the stack trace was referencing that local folder still and erroring out. Anyone know what config settings are affected when publishing? Obviously something is still pointing to my local C drive and I've searched my entire solution and don't see why.

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• Multi-tab application (C#)

  - by Zach

  Hi, I'm creating a multi-tabbed .NET application that allows the user to dynamically add and remove tabs at runtime. When a new tab is added, a control is added to it (as a child), in which the contents can be edited (eg. a text box). The user can perform tasks on the currently visible text box using a toolbar/menu bar. To better explain this, look at the picture below to see an example of what I want to accomplish. It's just a mock-up, so it doesn't actually work that way, but it shows what I want to get done. Essentially, like a multi-tabbed Notepad. View the image here: http://picasion.com/pic15/324b466729e42a74b9632c1473355d3b.gif Is this possible in .NET? I'm pretty sure it is, I'm just looking for a way that it can be implemented.

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• How do Java mocking frameworks work?

  - by Amir Rachum

  This is NOT a question about which is the best framework, etc. I have never used a mocking framework and I'm a bit puzzled by the idea. How does it know how to create the mock object? Is it done in runtime or generates a file? How do you know its behavior? And most importantly - what is the work flow of using such a framework (what is the step-by-step for creating a test). Can anyone explain? You can choose whichever framework you like for example, just say what it is.

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• Keeping connection to APNs open on App Engine using Modules in Go

  - by user3727820

  I'm trying to implement iOS push notifications for a messageboard app I've written (so like notification for new message ect. ect.) but have no real idea where to start. Alot the current documentation seems to be out of date in regard to keeping persistent TLS connections open to the APNs from App Engine and links to articles about depreciated backends I'm using the Go runtime and just keep getting stuck. For instance, the creation of the socket connection to APNs requires a Context which can only be got from a HTTP request, but architecturally this doesn't seem to make a lot of sense because ideally the socket remains open regardless. Is there any clearer guides around that I'm missing or right now is it a better idea to setup a separate VPS or compute instance to handle it?

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• Where did my Visual Studio exception assistant go?

  - by Steven

  Since a couple of weeks the Visual Studio (2008 9.0.30729.1 SP) Exception Assistant has stopt appearing while debugging using the C# IDE. Instead the old ugly and useless debug dialog comes up: To make sure, I've checked the following: "Tools / Options / Debugging / General / Enable the exception assistant" is on. "Debug / Exceptions / Common Language Runtime Exceptions / Thrown" is on. I reset my Visual Studio Settings. I googled. I checked all relevant stackoverflow questions. How can I get the Exception Assistant back? Who gives me the golden tip?

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• Java process problem in Eclipse

  - by Norbi

  Hi! This is my code: final String run_tool ="cmd.exe /C pelda.exe"; final Process tool_proc = null; Runnable doRun = new Runnable() { public void run() { try { tool_proc = Runtime.getRuntime().exec(run_tool); } catch (IOException e) { e.printStackTrace(); } } }; Thread th = new Thread(doRun); th.start(); InputStream toolstr = tool_proc.getInputStream(); After the eclipse gives this warning message fot the tool_proc variable: The final local variable tool_proc cannot be assigned, since it is defined in an enclosing type I dont't know why my code doesn't work please help me

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• Write a network simulator for fun

  - by Jono

  I want to write my own network simulator, for fun and for personal challenge. I hope to learn both new programming techniques, and a little bit more about networking. Previous object-oriented attempts ended very quickly, but I've recently downloaded and played with Microsoft's Axum (a new version was released today) and their Concurrency and Co-ordination Runtime. As I come from a very OO dominant background, I had never heard of Actor-oriented programming before; now it seems I've had my head in the sand until Scala and F# brought the paradigm to me. My questions are: a) is actor-oriented programming a better choice than object-oriented programming for this task, and if so b) where is a good place to start learning actor-oriented design?

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• Best way to globally set every control's ValidationGroup property in an asp.net?

  - by Steve Flook

  I have a User Control with form items that is re-used considerably throughout a large web application, and up until this point the validation summary upon an invalid form submission is being handled by the .aspx that consumes the User Control. Now I need to set the ValidationGroup property at runtime for each of my form items controls (textboxes, lists, validators, etc). Rather than do it manually by setting each control I'm interested in iterating through all the controls in the User Control, detecting if that control has a ValidationGroup property, and setting it's value that way. Something like this: For Each ctrl As System.Web.UI.Control In Me.Controls ' so now what is the proper way to detect if this control has the ValidationGroup property Next Code sample in vb.net or c# works for me. Many thanks!

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• Dynamic WSDL Location in .NET

  - by wadetandy

  I am building a C# application that is consuming a WSDL that is hosted by a server on our network. When I use the "Add Web Reference" functionality of Visual Studio, it works just fine, saving the ip address of the machine, etc. and the SOAP calls work without any issue. We are now making this entire application portable so that it can be installed in any environment. We would like to place all of our settings in one configuration file, so my question is this: Is it possible to somehow specify the IP address of the machine that is hosting the SOAP service in my configuration file and link everything dynamically at runtime?

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• Using a Type object to create a generic

  - by Richard Neil Ilagan

  Hello all! I'm trying to create an instance of a generic class using a Type object. Basically, I'll have a collection of objects of varying types at runtime, and since there's no way for sure to know what types they exactly will be, I'm thinking that I'll have to use Reflection. I was working on something like: Type elType = Type.GetType(obj); Type genType = typeof(GenericType<>).MakeGenericType(elType); object obj = Activator.CreateInstance(genType); Which is well and good. ^_^ The problem is, I'd like to access a method of my GenericType< instance, which I can't because it's typed as an object class. I can't find a way to cast it obj into the specific GenericType<, because that was the problem in the first place (i.e., I just can't put in something like:) ((GenericType<elType>)obj).MyMethod(); How should one go about tackling this problem? Many thanks! ^_^

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• How to bind the arguments in NSString in iphone?

  - by Prash.......

  Hi, i developing an application in which i want to bind my own parameter with an URL for http post request. But i findout the serious problem during the string binding, The code snippet as follows: NSString *mainURL1 = @"http://xxx.xxx.xx.xx/webservice/Service.asmx?op=UserDetailsNew?"; NSString *mainURL2 = [mainURL1 stringByAppendingString:@"MobileNo=%@",txtMobile.text]; NSString *mainURL3 = [mainURL2 stringByAppendingString:@"&Country=%@",txtCountry.text]; NSString *mainURL4 = [mainURL3 stringByAppendingString:@"&UserName=%@",txtName.text]; NSString *mainURL5 = [mainURL4 stringByAppendingString:@"&ScreenName=%@",txtScreenname.text]; NSString *mainURL6 = [mainURL5 stringByAppendingString:@"&EmailId=%@",txtemailid.text]; NSString *mainURL7 = [mainURL6 stringByAppendingString:@"&Password=%@",txtpassword.text]; NSString *mainURL8 = [mainURL7 stringByAppendingString:@"&RetypePassword=%@",txtretypepassword.text]; NSString *mainURL9 = [mainURL8 stringByAppendingString:@"%20HTTP/1.1"]; on binding the runtime arguments it ginev me too many parameter appending in NSString function. how i solve above problem?

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• Error Instantiating an Inner Class in Parent's Constructor...

  - by stormin986

  In my application's main class (subclass of Application), I have a public inner class that simply contains 3 public string objects. In the parent class I declare an object of that inner class. public class MainApplication extends Application { public class Data { public String x; public String y; public String z; } private Data data; MainApplication() { data = new Data() data.x = "String"; } } After I instantiate the object in the constructor, I get a runtime error when I try to assign any of the inner class object's variables. Any idea what's up here??

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• SharePoint: The template you have chosen is invalid or cannot be found.

  - by sridhar-guntur

  Exception in frmMPInstall.CreateSite: Microsoft.SharePoint.SPException: The template you have chosen is invalid or cannot be found. --- System.Runtime.InteropServices.COMException (0x81071E44): The template you have chosen is invalid or cannot be found. at Microsoft.SharePoint.Library.SPRequestInternalClass.ApplyWebTemplate(String bstrUrl, String& bstrWebTemplate, Int32& plWebTemplateId) at Microsoft.SharePoint.Library.SPRequest.ApplyWebTemplate(String bstrUrl, String& bstrWebTemplate, Int32& plWebTemplateId) --- End of inner exception stack trace At the time of Deploying the solution.It shows above error . It happed only in 64 bit processer. How to solve this problem help me please thanks.

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• C# debug vs release performance

  - by sagie

  Hi. I've encountered in the following paragraph: “Debug vs Release setting in the IDE when you compile your code in Visual Studio makes almost no difference to performance… the generated code is almost the same. The C# compiler doesn’t really do any optimisation. The C# compiler just spits out IL… and at the runtime it’s the JITer that does all the optimisation. The JITer does have a Debug/Release mode and that makes a huge difference to performance. But that doesn’t key off whether you run the Debug or Release configuration of your project, that keys off whether a debugger is attached.” The source is here and the podcast is here. Can someone direct me to a microsoft an article that can actualy prove this?

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• Replacing TCP/IP pipe with WCF

  - by msarchet

  So currently my company is using a TCP/IP connection to talk between server and client programs, right now we are building this connection using System.RunTime.Remoting, which is clunky and not that reliable. It was built about 5 years ago and the model keeps getting reused and it's starting to propagate some issues, ports used, refused connections, etc. I'm trying to find some resources on how to change this over to WCF but I'm not really sure what I am looking for or what I should be searching. If you want some more information on what were actually doing with it I can go into some detail, but I'll need to pull up the code and make sure I explain it completely. thanks!

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• how to update database using datagridview?

  - by Sikret Miseon

  how do we update tables using datagridview? assuming the datagridview is editable at runtime? any kind of help is appreciated. Dim con As New OleDb.OleDbConnection Dim dbProvider As String Dim dbSource As String Dim ds As New DataSet Dim da As OleDb.OleDbDataAdapter Dim sql As String Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load dbProvider = "PROVIDER=Microsoft.ACE.OLEDB.12.0;" dbSource = "Data Source = C:\record.accdb" con.ConnectionString = dbProvider & dbSource con.Open() sql = "SELECT * FROM StudentRecords" da = New OleDb.OleDbDataAdapter(sql, con) da.Fill(ds, "AddressBook") MsgBox("Database is now open") con.Close() MsgBox("Database is now Closed") DataGridView1.DataSource = ds DataGridView1.DataMember = "AddressBook" End Sub

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• jquery fancy box

  - by André Alçada Padez

  Hi, i'm using fancy box for some content editing in my backoffice. I recently added an image manager wich i create with javascript. It's kind of like a fancybox, but i had to do it from scractch for it to be able to overlay the first one. My problem is this: I want to have the user being able to press the escape key to close my manager, but if i use $(window).keypress when i press the esc key, both the boxes close. I have tried $(window).unbind('keypress') when i start loading my box, and i have tried to look through the fancybox js file, but it is minimized. Does anyone know how i can disable and afterwards enable the escape key (during runtime) on the fancybox? Thanx

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• Guice expert question

  - by Roman

  Hi All I am wondering if someone would be such an expert in guice that he even would know how to implement that : I have an injection annotation (@ConfParam)with some parameters , like that : class TestClass { private final int intValue; @Inject public TestClass(@ConfParam(section = "test1", key = "1") int intValue{ this.intValue = intValue; } public int getIntValue() { return intValue; } } The ConfParam is my custom annotation. Now , when the injection value is requested , I would like guice to create a dynamic binding, to resolve the value. For that binding I will need the parameters inside the annotation. Some example could be , I will have to look in the database in some table where the section is ? and the key is ?. All the trouble is that the data is not available when the injector is created and could be also be added at runtime. Ps. I static solution is easy. ( just have a look at the Names class)

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• How to initialise a STL vector/list with a class without invoking the copy constructor

  - by Warpspace

  I have a C++ program that uses a std::list containing instances of a class. If I call e.g. myList.push_back(MyClass(variable)); it goes through the process of creating a temporary variable, and then immediately copies it to the vector, and afterwards deletes the temporary variable. This is not nearly as efficient as I want, and sucks when you need a deep copy. I would love to have the constructor of my class new something and not have to implement a copy constructor just to allocate my memory for the second time and waste runtime. I'd also rather not have to immediately find the class instance from the vector/list and then manually allocate the memory (or do something horrible like allocate the memory in the copy constructor itself). Is there any way around this (I'm not using Visual Studio BTW)?

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• java statistics collection for performance evaluation

  - by user384706

  What is the most efficient way to collect and report performance statistic analysis from an application? If I have an application that uses a series of network apis, and I want to report statistics at runtime, e.g. Method doA() was called 3 times and consumed on avg 500ms Method doB() was called 5 times and consumed on avg 1200ms etc Then, I thought of using a well defined data structure (of collection) that each thread updates per remote call, and this can be used for the report. But I think that it will make the performance worse, for the time spend for statistics collection. Am I correct? How would I procceed if I used a background thread for this, and the other threads that did the remote calls were unaware of this collection gathering? Thanks

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• Is a program compiled with -g gcc flag slower than the same program compiled without -g?

  - by e271p314

  I'm compiling a program with -O3 for performance and -g for debug symbols (in case of crash I can use the core dump). One thing bothers me a lot, does the -g option results in a performance penalty? When I look on the output of the compilation with and without -g, I see that the output without -g is 80% smaller than the output of the compilation with -g. If the extra space goes for the debug symbols, I don't care about it (I guess) since this part is not used during runtime. But if for each instruction in the compilation output without -g I need to do 4 more instructions in the compilation output with -g than I certainly prefer to stop using -g option even at the cost of not being able to process core dumps. How to know the size of the debug symbols section inside the program and in general does compilation with -g creates a program which runs slower than the same code compiled without -g?

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