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  • How to continue after exception occurred in C#

    - by Manisha
    static string SomeMethodThatMightThrow(string s) { if (s[4] == 'C') throw new InvalidOperationException(); return @"C:\newFolder\" + s; } static void Main(string[] args) { string[] files = { "fileA.txt", "B.txC", "fileC.txt","fileD.txt" }; var exceptionDemoQuery = from file in files let n = SomeMethodThatMightThrow(file) select n; try { foreach (var item in exceptionDemoQuery) { Console.WriteLine("Processing {0}", item); } } catch (InvalidOperationException e) { Console.WriteLine(e.Message); } Console.WriteLine("Press any key to exit"); Console.ReadKey(); } Output is Processing C:\newFolder\fileA.txt Operation is not valid due to the current state of the object. But i need the Output as: Processing C:\newFolder\fileA.txt Operation is not valid due to the current state of the object. Operation is not valid due to the current state of the object. Processing C:\newFolder\fileD.txt Please help in this.............

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  • FBConnect Demo Application

    - by gmcalab
    I am running the demo application that is supplied with the facebook-ios-sdk. The application starts in the emulator, with a LogIn button. I click the button which then launches safari to grant access to the application. I log in with my fb creds and allow the application. I am the administrator for the application and I have verified I put in the right app key. After I allow access, it says "Safari cannot open the page because the address in invalid"...this is the url it's trying to go to: http://www.facebook.com/connect/uiserver.php... So am I missing something because the breakpoint for (void)fbDidLogin never gets hit...

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  • Deleting a node in a circular linked list c++?

    - by angad Soni
    I was wondering if anyone could help me understand if this code for deleting a node from a circular linked list would work, or if there is something i'm missing out on. using c++ to code. void circularList::deleteNode(int x) { node *current; node *temp; current = this-start; while(current->next != this->start) { if(current->next->value == x) { temp = current->next; current->next = current->next->next; delete current->next; } } }

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  • Ads in whole app iPhone problem

    - by lars
    I am using mobclix together with admob. The code is to big to add it in all classes. So i created a new class: Ads Everytime i want an ad in a view, i have to send the view to the ad class: - (void)initAd:(UIView *) pView { NSLog(@"ads init"); self.loadedView = pView; ..... To create an ad in a class: Ad* ad = [Ads new]; [ad initAd:self.view]; I dont know if thats the right way. I have to create a new Ads object everytime i change a view (or class). Is there a way to always have an Ads instance running, or is there another better way? Thanks alot!!

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  • Dictionary.ContainsKey return False, but a want True

    - by SkyN
    namespace Dic { public class Key { string name; public Key(string n) { name = n; } } class Program { static string Test() { Key a = new Key("A"); Key b = new Key("A"); System.Collections.Generic.Dictionary<Key, int> d = new System.Collections.Generic.Dictionary<Key, int>(); d.Add(a, 1); return d.ContainsKey(b).ToString(); } static void Main(string[] args) { System.Console.WriteLine(Test()); } } } I want TRUE!!!

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  • How would you write this C# code succinctly in Ruby?

    - by Valentin Vasilyev
    Here is the code: using System; using System.Collections.Generic; using System.Linq; namespace cs2 { class Program { static void Main(string[] args) { var i=Fibs().TakeWhile(x=>x < 1000).Where(x=>x % 2==0).Sum(); } static IEnumerable<long> Fibs() { long a = 0, b = 1; while (true) { yield return b; b += a; a = b - a; } } } } If it is possible, please give an example.

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  • Why can't I inject value null with Ninjects ConstructorArgument?

    - by stiank81
    When using Ninjects ConstructorArgument you can specify the exact value to inject to specific parameters. Why can't this value be null, or how can I make it work? Maybe it's not something you'd like to do, but I want to use it in my unit tests.. Example: public class Ninja { private readonly IWeapon _weapon; public Ninja(IWeapon weapon) { _weapon = weapon; } } public void SomeFunction() { var kernel = new StandardKernel(); var ninja = kernel.Get<Ninja>(new ConstructorArgument("weapon", null)); }

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  • How can i use .net webservice to make login app in android phone app?

    - by Srikanth Naidu
    How can i use .net webservice to make login app in android phone app? i have the Main.xml in layout like this i have a dologin.java package ads.login; import android.app.Activity; import android.os.Bundle; import android.view.View.OnClickListener; import android.view.View; import android.widget.Button; import android.widget.Toast; import android.app.AlertDialog; import android.content.DialogInterface; import android.app.ProgressDialog; public class DoLogin extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); } }

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  • Difference between debug and release.

    - by atch
    Why when I'm debugging in debug mode everything in code below works as suppose to but when I switch to release I'm getting strange result? void say_hello(int argc, char* argv[])//In release mode argc has different values from 124353625 to 36369852 <include iostream> { std::cout << "In say_hello()\n"; } int main(int argc, char* argv[]) { say_hello(3,argv);//when instead of literal I enter "argc" everything is ok. return 0; } Thanks for help.

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  • Can Somebody Explain this java code

    - by dubbeat
    Hi, I'm just starting out on android and my java is verry rusty. I can't remember ever seeing a function nested in another function like this before. Could somebody explain to me exactly what final does and explain why you would nest a function in another like this? private final Handler handler = new Handler() { @Override public void handleMessage(final Message msg) { Log.v(Constants.LOGTAG, " " + ReviewList.CLASSTAG + " worker thread done, setup ReviewAdapter"); progressDialog.dismiss(); if ((reviews == null) || (reviews.size() == 0)) { empty.setText("No Data"); } else { reviewAdapter = new ReviewAdapter(ReviewList.this, reviews); setListAdapter(reviewAdapter); } } };

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  • Can someone explain this java interface to me please?

    - by Karl Patrick
    I realize that the method run must be declared because its declared in the runnable interface. But my question comes when this class runs how is the Thread object allowed if there is no import call to a particular package? how does runnable know anything about Thread or its methods? does the runnable interface extend the thread class? Obviously i dont understand interfaces very well. thanks in advance. class PrimeFinder implements Runnable{ public long target; public long prime; public boolean finished = false; public Thread runner; PrimeFinder(long inTarget){ target = inTarget; if(runner == null){ runner = new Thread(this); runner.start() } } public void run(){ } }

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  • unrecognized selector sent to instance

    - by iamsmug
    My app works fine in the simulator but when I run it on my phone I get this error: 2010-04-05 21:32:45.119 Top Banana[119:207] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* -[MethodViewController setReferringObject:]: unrecognized selector sent to instance 0x16e930' It happens here: -(void)method { [UIView beginAnimations:@"View Flip" context:nil]; [UIView setAnimationDuration:0.50]; [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut]; [UIView setAnimationTransition: UIViewAnimationTransitionFlipFromRight forView:self.navigationController.view cache:NO]; MethodViewController *methodViewController = [[MethodViewController alloc] initWithNibName:@"MethodViewController" bundle:0]; NSManagedObject *selectedObject = self.referringObject; methodViewController.referringObject = selectedObject; [self.navigationController pushViewController:methodViewController animated:NO]; methodViewController.title = @"Method"; [UIView commitAnimations]; [MethodViewController release]; } It crashes on this line: methodViewController.referringObject = selectedObject; Not sure how to resolve this as it works in the simulator, I'm sure it is fairly basic to fix, any help will be appreciated.

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  • Java static method parameters

    - by Blitzkr1eg
    Why does the following code return 100 100 1 1 1 and not 100 1 1 1 1 ? public class Hotel { private int roomNr; public Hotel(int roomNr) { this.roomNr = roomNr; } public int getRoomNr() { return this.roomNr; } static Hotel doStuff(Hotel hotel) { hotel = new Hotel(1); return hotel; } public static void main(String args[]) { Hotel h1 = new Hotel(100); System.out.print(h1.getRoomNr() + " "); Hotel h2 = doStuff(h1); System.out.print(h1.getRoomNr() + " "); System.out.print(h2.getRoomNr() + " "); h1 = doStuff(h2); System.out.print(h1.getRoomNr() + " "); System.out.print(h2.getRoomNr() + " "); } } Why does it appear to pass Hotel by-value to doStuff() ?

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  • Why is 'using' improving C# performances

    - by Wernight
    It seems that in most cases the C# compiler could call Dispose() automatically. Like most cases of the using pattern look like: public void SomeMethod() { ... using (var foo = new Foo()) { ... } // Foo isn't use after here (obviously). ... } Since foo isn't used (that's a very simple detection) and since its not provided as argument to another method (that's a supposition that applies to many use cases and can be extended), the compiler could automatically call Dispose() without the developper requiring to do it. This means that in most cases the using is pretty useless if the compiler does some smart job. IDisposable seem low level enough to me to be taken in account by a compiler. Now why isn't this done? Wouldn't that improve the performances (if the developpers are... dirty).

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  • JNI: dll function works ok in C++ main, but not with dll wrapper

    - by Joseph Lim
    I have an a.dll (not modifiable as i do not have the source) with a function bool openPort(DWORD mem).I wrote a c++ main, loaded this dll using LoadLibrary, and the function works well.It returns true. Now, I need to call this function from Java via JNI. I wrote another b.dll with a function like so JNIEXPORT void JNICALL Java_MyClass_openPortFunc (JNIEnv *env, jobject obj, jint pMemPhy) { hInstLibrary = LoadLibrary("a.dll"); typedef bool (*openPort)(DWORD); openPort _openPort; _openPort = (openPort)GetProcAddress(hInstLibrary, "openPort"); DWORD memAddr = 0xda000; if(_openPort(memAddr)){ cout << "ok" << endl; }else{ cout << "failed " << endl; } } This however, causes the openPort to return false despite using the same parameters. I hope someone can advise me. Thank you. :)

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  • C++ conditional compilation

    - by Shaown
    I have the following code snippet #ifdef DO_LOG #define log(p) record(p) #else #define log(p) #endif void record(char *data){ ..... ..... } Now if I call log("hello world") in my code and DO_LOG isn't defined, will the line be compiled, in other words will it eat up the memory for the string "hello world"? P.S. There are a lot of record calls in the program and it is memory sensitive, so is there any other way to conditionally compile so that it only depends on the #define DO_LOG? Thanks in advance.

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  • How to invoke static method in C#4.0 with dynamic type?

    - by Morgan Cheng
    In C#4.0, we have dynamic type, but how to invoke static method of dynamic type object? Below code will generate exception at run time. class Foo { public static int Sum(int x, int y) { return x + y; } } class Program { static void Main(string[] args) { dynamic d = new Foo(); Console.WriteLine(d.Sum(1, 3)); } } IMHO, dynamic is invented to bridge C# and other programming language. There is some other language (e.g. Java) allows to invoke static method through object instead of type. BTW, The introduction of C#4.0 is not so impressive compared to C#3.0.

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  • Need help understanding .net ThreadPool

    - by Meredith
    I am trying to understand what ThreadPool does, I have this .NET example: class Program { static void Main() { int c = 2; // Use AutoResetEvent for thread management AutoResetEvent[] arr = new AutoResetEvent[50]; for (int i = 0; i < arr.Length; ++i) { arr[i] = new AutoResetEvent(false); } // Set the number of minimum threads ThreadPool.SetMinThreads(c, 4); // Enqueue 50 work items that run the code in this delegate function for (int i = 0; i < arr.Length; i++) { ThreadPool.QueueUserWorkItem(delegate(object o) { Thread.Sleep(100); arr[(int)o].Set(); // Signals completion }, i); } // Wait for all tasks to complete WaitHandle.WaitAll(arr); } } Does this run 50 "tasks", in groups of 2 (int c) until they all finish? Or I am not understanding what it really does.

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  • Displaying Nested Array Content with Time Delay in Flex

    - by MooCow
    I have a JSON array that look like this: (array here) I'm trying to use Flex to display each Project and its Milestone elements similar to a nested for-loop for 15 seconds per Milestone element before advancing to the next Project. I was shown a technique that works well for something without another array buried into it. var key:int = 0; var timer:timer = new timer (10000, project.length); timer.addEventListener (TimerEvent.TIMER, function showStuff(event:EVENT):void { trace project[key].projectName; key++; }); timer.start(); But that only replicate a single FOR-LOOP and not a nested FOR-LOOP. Any suggestions?

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  • How do I pass (by value) a struct in Objective-C?

    - by Striker
    This one has been driving me mad! I have a struct: typedef struct{ int a; }myStruct; Then I have: myStruct tempStruct; I am trying to pass the struct to a class method whose implementation is: - (void) myFunc:(struct myStruct)oneOfMyStructs{}; I call the method like so: [myClass myFunc:(struct myStruct)tempStruct]; The compiler complains about "Conversion to non-scalar type requested." All I want to do is pass a struct into a class method, but the syntax has me a bit confused. I'm new to Objective-C. Please let me know if you can see where I'm going wrong. I've not been able to pass by reference either, so if you could help me out with that, that would be great! Thanks!

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  • What's wrong with the following code ?

    - by dada
    #include <iostream> #include <string> using namespace std; int main(void) { string a; cin>>a; a.erase(a.end()-1); a.erase(a.begin()+1); string ge = "oae"; a.insert(a.begin()+1, ge); cout<<a<<endl; return 0; } It doesn't compile and i don't know why. Can you tell me what's wrong

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  • Cast Object to JTable?

    - by Chris
    I am trying to implement a ListSelectionListener for some of my JTables. Simply (at the moment) the ListSelectionListener is supposed to simply return the text of the cell that was selected. My program design has several JTables and I would like to have one ListSelectionListener work for them all. In the valueChanged event of the ListSelectionListener I thought it was possible to do something like: private class SelectionHandler implements ListSelectionListener { public void valueChanged(ListSelectionEvent e) { JTable table = (JTable)e.getSource(); String data = (String) table.getValueAt(table.getSelectedRow(), 0); // Print data } } But when I do this I a ClassCastException error. Is there a way to do something like this? One solution I thought of was to compare the source of the event (e.getSource()) to all my JTables to see if they were equivalent (big if block) and then just calling .getValueAt inside that block but that would making the code in the future difficult if tables were to be added or removed.

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  • I need to copy the text from a gridview texbox to the others in the column.

    - by Gilberto Munoz
    This is my code in c# protected void ibtCopiar_Click(object sender, ImageClickEventArgs e) { GridViewRow grdrows = DGPlanilla.Rows[0]; TextBox tb1 = (TextBox)grdrows.FindControl("TextBox1"); string valor = tb1.Text; if (valor != null || valor != "0") { foreach (GridViewRow grdrow in DGPlanilla.Rows) { grdrow.Cells[5].Text = valor; } } } this my code for the button when i debug i see that the value i have in the firts box is pass to the other textboxes in the column, but when it dysplay the page onle the first box show the value i have enter. the other texboxes don´t change.

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  • Passing an empty IEnumerable argument to a method

    - by avance70
    I have this method (simplified): void DoSomething(IEnumerable<int> numbers); And I invoke it like this: DoSomething(condition==true?results:new List<int>()); The variable results is formed with a LINQ select condition (IEnumerable). I was wondering is this List<int>() the best way (the fastest?) to pass an empty collection, or is new int[0] better? Or, something else would be faster, a Collection, etc.? In my example null wouldn't be ok.

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  • i don't know how to work with command argument in asp.net

    - by Depozitul de Chestii
    hey, i'm tryng to pass a parameter with command argument with a link button but the result i get is always "". this is in my aspx page: <% LinkButton1.CommandArgument = "abcdef"; %> <asp:LinkButton ID="LinkButton1" runat="server" OnCommand= "LinkButton1_Click"> and in my aspx.cs i have: protected void LinkButton1_Click(object sender,CommandEventArgs ee) { String id = ee.CommandName.ToString(); } the id is always "" after i press the linkbutton. would appreciate if someone could help me. thanks

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