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  • WPF/Silverlight DataBinding to interface property (with hidden implementation)

    - by Dave
    I have the following (C#) code namespace A { interface IX { bool Prop { get; set; } } class X : IX { public bool Prop { ... } } // hidden implementation of IX } namespace B { .. A.IX x = ...; object.DataContext = x; object.SetBinding(SomeDependencyProperty, new Binding("Prop")); .. } So I have a hidden implementation of an interface with a property "Prop" and I need to bind to this property in code. My problem is that the binding isn't working unless I make class X public. Is there any way around this problem?

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  • How do I select the item with the highest value using LINQ?

    - by mafutrct
    Imagine you got a class like this: class Foo { string key; int value; } How would you select the Foo with the highest value from an IEnumeralbe<Foo>? A basic problem is to keep the number of iterations low (i.e. at 1), but that affects readability. After all, the best I could find was something along the lines of this: IEnumerable<Foo> list; Foo max = list.Aggregate ((l, r) => l.value > r.value ? l : r); Can you think of a more better way?

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  • Junit | How to test parameters in a method

    - by MMRUser
    How do I test parameters inside a method itself. For example class TestClass { public void paraMethod(String para1, String para2) { String testPara1 = para1; String testPara2 = para2; } } class TestingClass { @Test public void testParaMethod () throws Exception { String myPara1 = "MyPara1"; String myPara2 = "MyPara2"; new TestClass().paraMethod(myPara1, myPara2); } } Ok, so is it possible to test if the testPara1 and testPara2 are properly set to the values that I have passed? Thanks.

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  • python's `with` statement

    - by Prestel Nué
    Hi there, seems like I do not understand something with---the python with statement. Consider this class: class test(object): def __enter__(self): pass def __exit__(self, *ignored): pass now, when using it with with, like in with test() as michael: print repr(michael) I would expect some output like <test instance at memore blah>. But I get None. Something wrong here? Any suggestions would help. (I am using Python 2.6.6.) EDIT: Thanks to ephement for pointing me to the documentation. The __enter__ method should read def __enter__(self): return self

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  • Jquery, div with two classes hide one show the other - conflict?????

    - by user349223
    Sorry if this was answered in a previous thread, i couldn't find one. I have 4 sections: Section1, Section2, Section3, Section4 There are classes for each section, so I am hiding and showing based on the section. The problem is some classes need to be showin in Section1 and Section2. <div class="section1 section2"> blah blah </div> $('a.homeLink').click(function(){ $('.section1').show(); $('.section2, .section3, .section4').hide(); return false; }); As you see in this case I have a div in two sections, but as i thought would happen it remains hidden due to hiding class section2 work arounds or solutions?? thanks

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  • Unable to pass attribute from controller to view

    - by MDS
    I'm using Spring MVC 3 for a web app. In the app a URI template is supposed to be handled by a controller method, which then passes an attribute to a view. Currently, the controller does handle the request, and it even forwards to the correct view. However, it does NOT pass the attribute to the view. Below are the URI template, controller method and relevent jsp tags. Anyone see what is wrong? URI: /home/{status} Controller: @RequestMapping("/home") @Controller public class HomeController { ... ... @RequestMapping(value="/{status}") public String homeStatusView(@PathVariable("status") String status, ModelMap model) { model.addAttribute("status", status); return "home"; } } JSP: ... <c:if test="${not empty status}"> <span class="status">Your status is available...</span> </c:if> ...

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  • MEF Why is ComposePart an extension method?

    - by ILovePaperTowels
    CompositionContainer.ComposePart is an extension method. why is that? Looking into the System.Componentmodel.Composition assembly, it looks like it's because it is ONLY meant to work with the attributed programming model while the .Compose() method is able to take in exports as long as it is a composablepart. ComposePart is even hosted in the 'AttributedModelServices' class which makes me think I'm correct. Am I correct on this? If not, why is it an extension method and not a method in the container class?

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  • jQuery .click() .toggle() - change display and swap character

    - by danit
    Here is my jQuery: $('.ask').click(function() { $('.addtitle').slideToggle('fast', function() { // Animation complete. }); }); And my HTML: <p class="ask">+</p> <div class="addtitle"> <p>Give your Idea a great title</p> <form name="input" action="#" method="get"> <input id="title" type="text" name="title" /> <input id="go" type="submit" value="Go" /> </form> </div> I have multiple .ask div's on the page and I only want it to effect the .next() div named .ask rather than all div's named .ask. I also want to .toggle() the '+' character to '-' Can anyone assist?

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  • How does make_pair know the types of its args?

    - by bobobobo
    The definition for make_pair in the MSVC++ "utility" header is: template<class _Ty1, class _Ty2> inline pair<_Ty1, _Ty2> make_pair(_Ty1 _Val1, _Ty2 _Val2) { // return pair composed from arguments return (pair<_Ty1, _Ty2>(_Val1, _Val2)); } I use make_pair all the time though without putting the argument types in angle brackets: map<string,int> theMap ; theMap.insert( make_pair( "string", 5 ) ) ; Shouldn't I have to tell make_pair that the first argument is std::string and not char* ? How does it know?

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  • Parent selector in jquery

    - by matthewsteiner
    I have a table row that needs to be hidden when the anchor with class "removerow" is clicked. <tr><td>Product Name</td><td><a class="removerow">Remove</a></td></tr> I've been trying this, but it doesn't work: $("a.removerow").click(function(){ $(tr > this).hide(); }); How can I select the entire table row with a child of ".removerow". What am I doing wrong? Thanks.

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  • Foreign Key Relationships

    - by Yehonathan Quartey
    I have two models class Subject(models.Model): name = models.CharField(max_length=100,choices=COURSE_CHOICES) created = models.DateTimeField('created', auto_now_add=True) modified = models.DateTimeField('modified', auto_now=True) syllabus = models.FileField(upload_to='syllabus') def __unicode__(self): return self.name and class Pastquestion(models.Model): subject=models.ForeignKey(Subject) year =models.PositiveIntegerField() questions = models.FileField(upload_to='pastquestions') def __unicode__(self): return str(self.year) Each Subject can have one or more past questions but a past question can have only one subject. I want to get a subject, and get its related past questions of a particular year. I was thinking of fetching a subject and getting its related past question. Currently am implementing my code such that I rather get the past question whose subject and year correspond to any specified subject like this_subject=Subject.objects.get(name=the_subject) thepastQ=Pastquestion.objects.get(year=2000,subject=this_subject) I was thinking there is a better way to do this. Or is this already a better way? Please Do tell ?

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  • C# 4.0 how to pass variables to threads?

    - by Aviatrix
    How would i pass some parameters to a new thread that runs a function from another class ? What i'm trying to do is to pass an array or multiple variables to a function that sits in another class and its called by a new thread. i have tried to do it like this Functions functions = new Functions(); string[] data; Thread th = new Thread(new ParameterizedThreadStart(functions.Post())); th.Start(data); but it shows error "No overload for method 'Post' takes 0 arguments" Any ideas ?

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  • Access to related Objects inside a model propery

    - by aliem
    Hi, I just run into some problems with django models. Example code is better than any word: class Cart(models.Model): updated_at = models.DateTimeField(auto_now=True) created_at = models.DateTimeField(auto_now_add=True) def __unicode__(self): return u'date %s;'%(self.created_at) def __str__(self): return self.__unicode__() def _total_items(self): """ Totale n di oggetti """ a = 0 for i in self.items.all: a += i.quantity return a total_items = property(_total_items) class Item(models.Model): cart = models.ForeignKey(Cart) quantity = models.PositiveIntegerField() def __unicode__(self): return u'product %s'%(self.id) def __str__(self): return self.__unicode__() but, when i call the cart property here's what i get in the python console: >>> a.total_items Traceback (most recent call last): File "<console>", line 1, in <module> File "models.py", line 49, in _total_items for i in self.item_set.all: TypeError: 'RelatedManager' object is not callable

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  • [C++] Start a thread using a method pointer

    - by Michael
    Hi ! I'm trying to develop a thread abstraction (POSIX thread and thread from the Windows API), and I would very much like it to be able to start them with a method pointer, and not a function pointer. What I would like to do is an abstraction of thread being a class with a pure virtual method "runThread", which would be implanted in the future threaded class. I don't know yet about the Windows thread, but to start a POSIX thread, you need a function pointer, and not a method pointer. And I can't manage to find a way to associate a method with an instance so it could work as a function. I probably just can't find the keywords (and I've been searching a lot), I think it's pretty much what Boost::Bind() does, so it must exist. Can you help me ?

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  • Does the following indicate a bad design?

    - by Mewzer
    Hello, I was wondering whether you think the following code usually indicates a bad design ... class X { public: ... private: Y y; }; Class Y { public: Y( X& value ){ x = value; }; private: X& x; } (i.e. there is some sort of cyclic dependency between the classes X and Y).

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  • Dictionary not deserializing

    - by Shadow
    I'm having a problem where one Dictionary in my project is either not serializing or not deserializing. After deserializing, the data I serialized is simply not in the object. Here's the relevant snip of the class being serialized: class Person : ISerializable { private Dictionary<Relation,List<int>> Relationships = new Dictionary<Relation,List<int>>(); public Person(SerializationInfo info, StreamingContext context) { this.Relationships = (Dictionary<Relation, List<int>>) info.GetValue("Relationships", typeof(Dictionary<Relation, List<int>>)); } public void GetObjectData(SerializationInfo info, StreamingContext context) { info.AddValue("Relationships", this.Relationships); } } Note, this is binary serialization. Everything else in the project serializes and deserialzes correctly.

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  • C++ template specialization

    - by user231536
    I have a class template <typename T> class C { static const int K=1; static ostream& print(ostream& os, const T& t) { return os << t;} }; I would like to specialize C for int. //specialization for int template <> C<int>{ static const int K=2; } I want the default print method that works for int to remain and just change the constant. For some specializations, I want to keep K=1 and change the print method because there is no << operator. How do I do this?

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  • Include only the latest/newest associated record with active record?

    - by railsnewbie
    is it possible to load only the latest associated record of an associated table? an example: class author attr_accessible :first_name, :last_name, :birthday has_many :books end class book attr_accessible :pages, :date of publication, :title belongs_to :author end Is there a way to generate a scope to load only the newest released book the author wrote? Or the book with the most pages? I know, that I could include or join all books. But I don't know if its possible to load only a specific book for each author. So that I could do a query like this: Author.authors_and_their_newest_book So that I could get these results first_name_author_1, last_name_author_1, birthday_author_1, pages_book_3, date of publication_book_3, title_book_3 first_name_author_2, last_name_author_2, birthday_author_2, pages_book_5, date of publication_book_5, title_book_5 first_name_author_3, last_name_author_3, birthday_author_3, pages_book_9, date of publication_book_9, title_book_9 ...

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  • Problem in to navigate on UITableView on the UIButtonClick which is present in UITabBarController sc

    - by Rajendra Bhole
    Hi, I develop an application in which i want to on UIButton Click the application navigate on UITableViewcontroller class.The UIButton is already on UITabBarController during the navigation the tab bar should be visible.The calling method in first tab bar controller class is, [appDelegate.nvcHome pushViewController:itemMenuTable animated:YES]; [itemMenuTable release]; itemMenuTable = nil; But it given me the following problem in GDB, Application tried to push a nil view controller on target . Also i want to display the icon and title of UITabBarController in programmatically, the code is, homeViewControllerLink = [[homeViewController alloc]initWithNibName:@"homeViewController" bundle:nil]; nvcHome = [[UINavigationController alloc]initWithRootViewController:homeViewControllerLink]; nvcHome.navigationBar.barStyle = UIStatusBarStyleBlackOpaque; UIImage *imgHomeTab = [UIImage imageNamed:@"home"]; [nvcHome.tabBarItem initWithTitle:@"Home" image:imgHomeTab tag:101]; [homeViewControllerLink release]; But it does not display when i running my app on iphone simulator.

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  • C++: Could Polymorphic Copy Constructors work?

    - by 0xC0DEFACE
    Consider: class A { public: A( int val ) : m_ValA( val ) {} A( const A& rhs ) {} int m_ValA; }; class B : public A { public: B( int val4A, int val4B ) : A( val4A ), m_ValB( val4B ) {} B( const B& rhs ) : A( rhs ), m_ValB( rhs.m_ValB ) {} int m_ValB; }; int main() { A* b1 = new B( 1, 2 ); A* b2 = new A( *b1 ); // ERROR...but what if it could work? return 0; } Would C++ be broken if "new A( b1 )" was able to resolve to creating a new B copy and returning an A? Would this even be useful?

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  • Language in mdi forms

    - by WFgo
    I have a problem with set lenguage to MDI forms. In my main form I have a menustrip and I use resource file for translate I wanted to know if I'm doing the right thing My code is this (Example): Public Class Main Public SNFrm As New SalesNote Private Sub SetLanguage() SNFrm.Text = My.Resources.... SNFrm.AcceptBtn.Text = My.Resources... End Sub Private Sub MenuSalesNote_Click(......) SNFrm = New SalesNote SNFrm.MdiParent = Me SNFrm.StartPosition = FormStartPosition.CenterScreen SNFrm.Show() End Sub End Class Then, in My SalesNote Form_Closing Event Main.SNFrm.Dispose() is this correctly? Help!

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  • allignment issue of div tag

    - by Quasar the space thing
    I am trying to create a web page where on click of a button I can add div tags. What I thought to do was that I'll create two div tags within a single div so that over all presentation will be uniform and similar to a table having two columns and multiple rows and the first column contains only label's and second column will contain textbox. Here is the JS file : var counter = 0; function create_div(type){ var dynDiv = document.createElement("div"); dynDiv.id = "divid_"+counter; dynDiv.class="main"; document.body.appendChild(dynDiv); question(); if(type == 'ADDTEXTBOX'){ ADDTEXTBOX(); } counter=counter+1; } function question(){ var question_div = document.createElement("div"); question_div.class="question"; question_div.id = "question_div_"+counter; var Question = prompt("Enter The Question here:", ""); var node=document.createTextNode(Question); question_div.appendChild(node); var element=document.getElementById("divid_"+counter); element.appendChild(question_div); } function ADDTEXTBOX(){ var answer_div = document.createElement("div"); answer_div.class="answer"; answer_div.id = "answer_div_"+counter; var answer_tag = document.createElement("input"); answer_tag.id = "answer_tag_"+counter; answer_tag.setAttribute("type", "text"); answer_tag.setAttribute("name", "textbox"); answer_div.appendChild(answer_tag); var element=document.getElementById("divid_"+counter); element.appendChild(answer_div); } Here is the css file : .question { width: 40%; height: auto; float: left; display: inline-block; text-align: justify; word-wrap:break-word; } .answer { padding-left:10%; width: 40%; height: auto; float: left; overflow: auto; word-wrap:break-word; } .main { width: auto; background-color:gray; height: auto; overflow: auto; word-wrap:break-word; } My problem is that the code is working properly but both the divisions are not coming in a straight line. after the first div prints on the screen the second divisions comes in another line. How can I make both the div's come in the same line ? Thank You. PS : should I stick with the current idea of using div or should I try some other approach ? like tables ?

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  • WPF/INotifyPropertyChanged, change the value of txtA, the txtB and txtC should change automatically?

    - by user1033098
    I supposed, once i change the value of txtA, the txtB and txtC would change automatically, since i have implemented INotifyPropertyChanged for ValueA. But they were not updated on UI. txtB was always 100, and txtC was always -50. I don't know what's the reason. My Xaml.. <Window x:Class="WpfApplicationReviewDemo.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="350" Width="525"> <StackPanel> <TextBox Name="txtA" Text="{Binding ValueA}" /> <TextBox Name="txtB" Text="{Binding ValueB}" /> <TextBox Name="txtC" Text="{Binding ValueC}" /> </StackPanel> </Window> My code behind... public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); this.DataContext = new Model(); } } public class Model : INotifyPropertyChanged { private decimal valueA; public decimal ValueA { get { return valueA; } set { valueA = value; PropertyChanged(this, new PropertyChangedEventArgs("ValueA")); } } private decimal valueB; public decimal ValueB { get { valueB = ValueA + 100; return valueB; } set { valueB = value; PropertyChanged(this, new PropertyChangedEventArgs("ValueB")); } } private decimal valueC; public decimal ValueC { get { valueC = ValueA - 50; return valueC; } set { valueC = value; PropertyChanged(this, new PropertyChangedEventArgs("ValueC")); } } #region INotifyPropertyChanged Members public event PropertyChangedEventHandler PropertyChanged; #endregion } After i add code to the set method of ValueA property, it works. public decimal ValueA { get { return valueA; } set { valueA = value; PropertyChanged(this, new PropertyChangedEventArgs("ValueA")); PropertyChanged(this, new PropertyChangedEventArgs("ValueB")); PropertyChanged(this, new PropertyChangedEventArgs("ValueC")); } } But I supposed it should be automatically refresh/updated for txtB and txtC. Please advise.

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