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  • Trying to use RemoveChild() on XmlNodeList messes up my XmlNode collection

    - by user299090
    Hi there, I'm trying to remove a specific node from a XmlNodeList named listaWidths. This specific list has 5 items before I use RemoveChild(). But, after the RemoveChild() statement, the list stays only with 1 item. XmlNodeList listaWidths = xmlDoc.SelectNodes("/MsBuild:Report/MsBuild:Body/MsBuild:ReportItems/MsBuild:Tablix/MsBuild:TablixBody/MsBuild:TablixColumns/*", nsmgr); int indexEpoca = 0; //Remover época XmlNode node = listaWidths[indexEpoca]; XmlNode parent = listaWidths[indexEpoca].ParentNode; parent.RemoveChild(node); This is a RDL Reporting Services XML. The specific XML code is here: <Tablix Name="Tablix3"> <TablixBody> <TablixColumns> <TablixColumn> <Width>1.602in</Width> </TablixColumn> <TablixColumn> <Width>1.61in</Width> </TablixColumn> <TablixColumn> <Width>1.6323in</Width> </TablixColumn> <TablixColumn> <Width>1.6023in</Width> </TablixColumn> <TablixColumn> <Width>1.6033in</Width> </TablixColumn> </TablixColumns> (...) I've tried every combination possible, with no luck whatsoever. What am I doing wrong? Thank you.

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  • Python base classes share attributes?

    - by tad
    Code in test.py: class Base(object): def __init__(self, l=[]): self.l = l def add(self, num): self.l.append(num) def remove(self, num): self.l.remove(num) class Derived(Base): def __init__(self, l=[]): super(Derived, self).__init__(l) Python shell session: Python 2.6.5 (r265:79063, Apr 1 2010, 05:22:20) [GCC 4.4.3 20100316 (prerelease)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import test >>> a = test.Derived() >>> b = test.Derived() >>> a.l [] >>> b.l [] >>> a.add(1) >>> a.l [1] >>> b.l [1] >>> c = test.Derived() >>> c.l [1] I was expecting "C++-like" behavior, in which each derived object contains its own instance of the base class. Is this still the case? Why does each object appear to share the same list instance?

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  • 2 Classes need each other declared C++

    - by Prodigga
    I have a "Game" class which holds all the games settings and manages the game. I have a "Grid" class which is the grid the game is played on. The "Game" class initializes a "Grid" object as one of its members (passing itself ("this") as one of the parameters for "Grid"s constructor).. The "Grid" object therefor needs to deal with a "Game*" pointer. To do this it needs to know what "Game" is; i need to declare it before "Grid". But "Game" uses "Grid"...so it also needs "Grid" declared before it. so confused on how to include headers/etc correctly here..

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  • Will this static class break in a multi user scenario ?

    - by Perpetualcoder
    Say I make a static class like following with an extension method: public static class MyStaticExtensionClass { private static readonly Dictionary<int, SomeClass> AlgoMgmtDict = new Dictionary<int, SomeClass>(); public static OutputClass ToOutput(this InputClass input) { // clears up the dict // does some kind of transform over the input class // return an OutputClass object } } In a multi user system, will the state management dictionary fail to provide correct values for the transform algorithm? Will a regular class be a better design or shoving the Dictionary inside the method a better design?

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  • Add methods to generated WCF client proxy code

    - by dcstraw
    I'd like to add one additional method for each service operation in my WCF client proxy code (i.e. the generated class that derives from ClientBase). I have written a Visual Studio extension that has an IOperationContractGenerationExtension implementation, but this interface only seems to expose the ability to modify the service interface, not the ClientBase-derived class. Is there any way to generate new methods in the proxy client class?

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  • Shared(Static) classes with events in C#

    - by diamandiev
    Here is an example of what i would do in vb: Public Class Class1 Public Shared WithEvents Something As New EventClass Public Shared Sub DoStuff() Handles Something.Test End Sub End Class Public Class EventClass Public Event Test() End Class Now how do i do this in c#. I know there is not handles clause in c# so i need some function that is called and assign the event handlers there. However since its a shared class there is no constructor i must put it somewhere outside of a function. Any ideas?

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  • How do I get C# to garbage collect aggressively?

    - by mmr
    I have an application that is used in image processing, and I find myself typically allocating arrays in the 4000x4000 ushort size, as well as the occasional float and the like. Currently, the .NET framework tends to crash in this app apparently randomly, almost always with an out of memory error. 32mb is not a huge declaration, but if .NET is fragmenting memory, then it's very possible that such large continuous allocations aren't behaving as expected. Is there a way to tell the garbage collector to be more aggressive, or to defrag memory (if that's the problem)? I realize that there's the GC.Collect and GC.WaitForPendingFinalizers calls, and I've sprinkled them pretty liberally through my code, but I'm still getting the errors. It may be because I'm calling dll routines that use native code a lot, but I'm not sure. I've gone over that C++ code, and make sure that any memory I declare I delete, but still I get these C# crashes, so I'm pretty sure it's not there. I wonder if the C++ calls could be interfering with the GC, making it leave behind memory because it once interacted with a native call-- is that possible? If so, can I turn that functionality off?

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  • Can .NET Task instances go out of scope during run?

    - by Henry Jackson
    If I have the following block of code in a method (using .NET 4 and the Task Parallel Library): var task = new Task(() => DoSomethingLongRunning()); task.Start(); and the method returns, will that task go out of scope and be garbage collected, or will it run to completion? I haven't noticed any issues with GCing, but want to make sure I'm not setting myself up for a race condition with the GC.

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  • Am I trying to Implement Multiple Inheritance. How can I do this.

    - by Shantanu Gupta
    I have created a class say A which has some functions defined as protected. Now Class B inherits A and class C inherits B. Class A has private default constructor and protected parameterized constructor. I want Class B to be able to access all the protected functions defined in Class A but class C can have access on some of the functions only not all the functions and class C is inheriting class B. How can I restrict access to some of the functions of Class A from Class C ? EDIT: namespace Db { public Class A { private A(){} protected A(string con){assign this value} protected DataTable getTable(){return Table;} protected Sqlparameters setParameters(){return parameter;} } } namespace Data { public Class B:A { protected B():base("constring"){} protected DataTable output(){return getTable();} protected sqlparameter values(param IDataParameter[] parameter){} } } namespace Bsns { public Class C:B { protected C():base(){} protected DataTable show() {return values(setparameter());} } } EDIT I think what I am trying to do here is Multiple inheritance. Please check. Class A { //suppose 10 functions are declared } Class B:A { //5 functions declared which are using A's function in internal body } Class C:B { //using all functions of B but require only 4 functions of A to be accessible by C. }

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  • Help with psudo classes in CSS

    - by Anil Namde
    <a class="success" href="javascript:void(0)"></a> //CSS for setting background for above link a.success:hover{ //set background image } What my intent is to change the class of link on server side based on success/fail and set icon for the link accordingly. But above CSS is not working as expected. Can someone plz help with this.

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  • destructor and copy-constructor calling..(why does it get called at these times)

    - by sil3nt
    Hello there, I have the following code #include <iostream> using namespace std; class Object { public: Object(int id){ cout << "Construct(" << id << ")" << endl; m_id = id; } Object(const Object& obj){ cout << "Copy-construct(" << obj.m_id << ")" << endl; m_id = obj.m_id; } Object& operator=(const Object& obj){ cout << m_id << " = " << obj.m_id << endl; m_id = obj.m_id; return *this; } ~Object(){ cout << "Destruct(" << m_id << ")" << endl; } private: int m_id; }; Object func(Object var) { return var; } int main(){ Object v1(1); cout << "( a )" << endl; Object v2(2); v2 = v1; cout << "( b )" << endl; Object v4 = v1; Object *pv5; pv5 = &v1; pv5 = new Object(5); cout << "( c )" << endl; func(v1); cout << "( d )" << endl; delete pv5; } which outputs Construct(1) ( a ) Construct(2) 2 = 1 ( b ) Copy-construct(1) Construct(5) ( c ) Copy-construct(1) Copy-construct(1) Destruct(1) Destruct(1) ( d ) Destruct(5) Destruct(1) Destruct(1) Destruct(1) I have some issues with this, firstly why does Object v4 = v1; call the copy constructor and produce Copy-construct(1) after the printing of ( b ). Also after the printing of ( c ) the copy-constructor is again called twice?, Im not certain of how this function works to produce that Object func(Object var) { return var; } and just after that Destruct(1) gets called twice before ( d ) is printed. sorry for the long question, I'm confused with the above.

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  • importing classes python

    - by Richard
    Just wondering why import sys exit(0) gives me this error: Traceback (most recent call last): File "<pyshell#1>", line 1, in ? exit(0) TypeError: 'str' object is not callable but from sys import exit exit(0) works fine?

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  • What classes should I map against with NHibernate?

    - by apollodude217
    Currently, we use NHibernate to map business objects to database tables. Said business objects enforce business rules: The set accessors will throw an exception on the spot if the contract for that property is violated. Also, the properties enforce relationships with other objects (sometimes bidirectional!). Well, whenever NHibernate loads an object from the database (e.g. when ISession.Get(id) is called), the set accessors of the mapped properties are used to put the data into the object. What's good is that the middle tier of the application enforces business logic. What's bad is that the database does not. Sometimes crap finds its way into the database. If crap is loaded into the application, it bails (throws an exception). Sometimes it clearly should bail because it cannot do anything, but what if it can continue working? E.g., an admin tool that gathers real-time reports runs a high risk of failing unnecessarily instead of allowing an admin to even fix a (potential) problem. I don't have an example on me right now, but in some instances, letting NHibernate use the "front door" properties that also enforce relationships (especially bidi) leads to bugs. What are the best solutions? Currently, I will, on a per-property basis, create a "back door" just for NHibernate: public virtual int Blah {get {return _Blah;} set {/*enforces BR's*/}} protected virtual int _Blah {get {return blah;} set {blah = value;}} private int blah; I showed the above in C# 2 (no default properties) to demonstrate how this gets us basically 3 layers of, or views, to blah!!! While this certainly works, it does not seem ideal as it requires the BL to provide one (public) interface for the app-at-large, and another (protected) interface for the data access layer. There is an additional problem: To my knowledge, NHibernate does not give you a way to distinguish between the name of the property in the BL and the name of the property in the entity model (i.e. the name you use when you query, e.g. via HQL--whenever you give NHibernate the name (string) of a property). This becomes a problem when, at first, the BR's for some property Blah are no problem, so you refer to it in your O/R mapping... but then later, you have to add some BR's that do become a problem, so then you have to change your O/R mapping to use a new _Blah property, which breaks all existing queries using "Blah" (common problem with programming against strings). Has anyone solved these problems?!

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  • How to unit test generic classes

    - by Rowland Shaw
    I'm trying to set up some unit tests for an existing compact framework class library. However, I've fallen at the first hurdle, where it appears that the test framework is unable to load the types involved (even though they're both in the class library being tested) Test method MyLibrary.Tests.MyGenericClassTest.MyMethodTest threw exception: System.MissingMethodException: Could not load type 'MyLibrary.MyType' from assembly 'MyLibrary, Version=1.0.3778.36113, Culture=neutral, PublicKeyToken=null'.. My code is loosely: public class MyGenericClass<T> : List<T> where T : MyType, new() { public bool MyMethod(T foo) { throw new NotImplementedException(); } } With test methods: public void MyMethodTestHelper<T>() where T : MyType, new() { MyGenericClass<T> target = new MyGenericClass<T>(); foo = new T(); expected = true; actual = target.MyMethod(foo); Assert.AreEqual(expected, actual); } [TestMethod()] public void MyMethodTest() { MyMethodTestHelper<MyType>(); } I'm a bit stumped though, as I can't even get it to break in the debugger to get to the inner exception, so what else do I check? EDIT this does seem to be something specific to the Compact Framework - recompiling the class libraries and the unit tests for the full framework, gives the expected output (i.e. the debugger stops when I'm going to throw a NotImplementedException).

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  • How should I structure my repository classes?

    - by Innogetics
    I am new to DDD. In my mini-project, I have a structure that looks like this (different from the actual names): EntryClassificationGroup EntryClassification Entry EntryType Should I have just one repository class for all these 4 entities, since they are all related? Or should I have individual repositories for each one?

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  • AsyncTask, inner classes and Buttons states

    - by Intern John Smith
    For a musical application (a sequencer), I have a few buttons static ArrayList<Button> Buttonlist = new ArrayList<Button>(); Buttonlist.add(0,(Button) findViewById(R.id.case_kick1)); Buttonlist.add(1,(Button) findViewById(R.id.case_kick2)); Buttonlist.add(2,(Button) findViewById(R.id.case_kick3)); Buttonlist.add(3,(Button) findViewById(R.id.case_kick4)); Buttonlist.add(4,(Button) findViewById(R.id.case_kick5)); Buttonlist.add(5,(Button) findViewById(R.id.case_kick6)); Buttonlist.add(6,(Button) findViewById(R.id.case_kick7)); Buttonlist.add(7,(Button) findViewById(R.id.case_kick8)); that I activate through onClickListeners with for example Buttonlist.get(0).setActivated(true); I played the activated sound via a loop and ifs : if (Buttonlist.get(k).isActivated()) {mSoundManager.playSound(1); Thread.sleep(250);} The app played fine but I couldn't access the play/pause button when it was playing : I searched and found out about AsyncTasks. I have a nested class PlayPause : class PlayPause extends AsyncTask<ArrayList<Button>,Integer,Void> in which I have this : protected Void doInBackground(ArrayList<Button>... params) { for(int k=0;k<8;k++) { boolean isPlayed = false; if (Buttonlist.get(k).isActivated()) { mSoundManager.playSound(1); isPlayed = true; try {Thread.sleep(250); } catch (InterruptedException e) {e.printStackTrace();}} if(!isPlayed){ try {Thread.sleep(250);} catch (InterruptedException e) {e.printStackTrace();} } } return null; } I launch it via Play.setOnClickListener(new PlayClickListener()); with PlayClickListener : public class PlayClickListener implements OnClickListener { private Tutorial acti; public PlayClickListener(){ super(); } @SuppressWarnings("unchecked") public void onClick(View v) { if(Tutorial.play==0){ Tutorial.play=1; Tutorial.Play.setBackgroundResource(R.drawable.action_down); acti = new Tutorial(); Tutorial.PlayPause myPlayPause = acti.new PlayPause(); myLecture.execute(Tutorial.Buttonlist); } else { Tutorial.play=0; Tutorial.lecture.cancel(true); Tutorial.Play.setBackgroundResource(R.drawable.action); } } } But it doesn't work. when I click on buttons and I touch Play/Pause, I have this : 07-02 11:06:01.350: E/AndroidRuntime(7883): FATAL EXCEPTION: AsyncTask #1 07-02 11:06:01.350: E/AndroidRuntime(7883): Caused by: java.lang.NullPointerException 07-02 11:06:01.350: E/AndroidRuntime(7883): at com.Tutorial.Tutorial$PlayPause.doInBackground(Tutorial.java:603) 07-02 11:06:01.350: E/AndroidRuntime(7883): at com.Tutorial.Tutorial$PlayPause.doInBackground(Tutorial.java:1) And I don't know how to get rid of this error. Obviously, the Asynctask doesn't find the Buttonlist activated status, even if the list is static. I don't know how to access these buttons' states, isPressed doesn't work either. Thanks for reading and helping me !

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  • Android: passing paramters between classes

    - by Yang
    I have a class2 which is involved by class1 when clicks are made. I have to pass some parameters/objects from class1 to class2. I only know the standard way which does not have an option of passing parameters. // launch the full article Intent i = new Intent(this, Class2.class); startActivity(i);

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  • .NET Free memory usage (how to prevent overallocation / release memory to the OS)

    - by Ronan Thibaudau
    I'm currently working on a website that makes large use of cached data to avoid roundtrips. At startup we get a "large" graph (hundreds of thouthands of different kinds of objects). Those objects are retrieved over WCF and deserialized (we use protocol buffers for serialization) I'm using redgate's memory profiler to debug memory issues (the memory didn't seem to fit with how much memory we should need "after" we're done initializing and end up with this report Now what we can gather from this report is that: 1) Most of the memory .NET allocated is free (it may have been rightfully allocated during deserialisation, but now that it's free, i'd like for it to return to the OS) 2) Memory is fragmented (which is bad, as everytime i refresh the cash i need to redo the memory hungry deserialisation process and this, in turn creates large object that may throw an OutOfMemoryException due to fragmentation) 3) I have no clue why the space is fragmented, because when i look at the large object heap, there are only 30 instances, 15 object[] are directly attached to the GC and totally unrelated to me, 1 is a char array also attached directly to the GC Heap, the remaining 15 are mine but are not the cause of this as i get the same report if i comment them out in code. So my question is, what can i do to go further with this? I'm not really sure what to look for in debugging / tools as it seems my memory is fragmented, but not by me, and huge amounts of free spaces are allocated by .net , which i can't release. Also please make sure you understand the question well before answering, i'm not looking for a way to free memory within .net (GC.Collect), but to free memory that is already free in .net , to the system as well as to defragment said memory. Note that a slow solution is fine, if it's possible to manually defragment the large heap i'd be all for it as i can call it at the end of RefreshCache and it's ok if it takes 1 or 2 second to run. Thanks for your help! A few notes i forgot: 1) The project is a .net 2.0 website, i get the same results running it in a .net 4 pool, idem if i run it in a .net 4 pool and convert it to .net 4 and recompile. 2) These are results of a release build, so debug build can not be the issue. 3) And this is probably quite important, i do not get these issues at all in the webdev server, only in IIS, in the webdev i get memory consumption rather close to my actual consumption (well more, but not 5-10X more!)

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  • Why does GC not clear the Dialog references?

    - by Pavel
    I have a dialog. Every time I create it and then dispose, it stays in memory. It seems to be a memory leak somewhere, but I can't figure it out. Do you have any ideas? See the screenshot of heap dump for more information. Thanks in advance. http://img441.imageshack.us/img441/5764/leak.png

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  • Why can't you call a non-static method from a static method?

    - by VoodooChild
    I have a static method [Method1] in my class, which calls another method [Method2] in the same class and is not a static method. But this is a no-no. I get this error: An object reference is required for the non-static field, method, or property "ClassName.MethodName()" Can someone please briefly describe why? including other things that might be related to this.

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  • jquery :last missing multiple classes

    - by mickyjtwin
    I have an unordered list, and am using jquery to find the last ul and apply a class. jQuery("ul.class1:last").addClass("lastUi"); The html is as follows: <ul class="class1"></ul> <ul class="class1"></ul> This is working fine, however it has now changed in that another class is being added to the list so the html looks like: <ul class="class1"></ul> <ul class="class1 class2"></ul> <ul class="class1"></ul> <ul class="class1 class2"></ul> The jQuery code is now not picking up the last ul with both class1 and class2 as the last element and isn't adding the lastUI class.

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  • Using Assert to compare two objects

    - by baron
    Hi everyone, Writing test cases for my project, one test I need is to test deletion. This may not exactly be the right way to go about it, but I've stumbled upon something which isn't making sense to me. Code is like this: [Test] private void DeleteFruit() { BuildTestData(); var f1 = new Fruit("Banana",1,1.5); var f2 = new Fruit("Apple",1,1.5); fm.DeleteFruit(f1,listOfFruit); Assert.That(listOfFruit[1] == f2); } Now the fruit object I create line 5 is the object that I know should be in that position (with this specific dataset) after f1 is deleted. Also if I sit and debug, and manually compare objects listOfFruit[1] and f2 they are the same. But that Assert line fails. What gives?

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  • Java Passing variables around classes

    - by nazerb
    I am new to java and am trying to pass variables like in the following example from one class to another, im wondering is this possible and how i would go about it if it is. As this code does not work as it is not static. Main Class public class testAll { public static void main(String[] args) { One one = new One(); Two two = new Two(); } } The first class: public class One { public int test = 4; public int getTest() { return this.test; } } The second class: public class Two { public void value() { System.out.print("Var is: " + One.getTest()); } } Thanks, Naz

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