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  • How to get parent item in Treeview

    - by Anu
    Hi,To get the child items as string i used the following code private void treeview1_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e) { if (treeview1.SelectedItem != null) { Animal bar = (Animal)treeview1.SelectedItem; string str = bar.Name; int boxty = bar.BoxType; int boxno = bar.BoxNo; } } It works fine .But when i click on parent(instead of + sign),it goes to this code and shows error.Ofcourse im casting SelectedItem to my List-Animal. But i dont want this.I have to check,whether the clciked item is parent,if it is so then i will skip this coding.Only when i click the child items it will go to this coding. How can i do that?How can i identify the selected item is parent.

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  • Is it normal for C++ static initialization to appear twice in the same backtrace?

    - by Joseph Garvin
    I'm trying to debug a C++ program compiled with GCC that freezes at startup. GCC mutex protects function's static local variables, and it appears that waiting to acquire such a lock is why it freezes. How this happens is rather confusing. First module A's static initialization occurs (there are __static_init functions GCC invokes that are visible in the backtrace), which calls a function Foo(), that has a static local variable. The static local variable is an object who's constructor calls through several layers of functions, then suddenly the backtrace has a few ??'s, and then it's is in the static initialization of a second module B (the __static functions occur all over again), which then calls Foo(), but since Foo() never returned the first time the mutex on the local static variable is still set, and it locks. How can one static init trigger another? My first theory was shared libraries -- that module A would be calling some function in module B that would cause module B to load, thus triggering B's static init, but that doesn't appear to be the case. Module A doesn't use module B at all. So I have a second (and horrifying) guess. Say that: Module A uses some templated function or a function in a templated class, e.g. foo<int>::bar() Module B also uses foo<int>::bar() Module A doesn't depend on module B at all At link time, the linker has two instances of foo<int>::bar(), but this is OK because template functions are marked as weak symbols... At runtime, module A calls foo<int>::bar, and the static init of module B is triggered, even though module B doesn't depend on module A! Why? Because the linker decided to go with module B's instance of foo::bar instead of module A's instance at link time. Is this particular scenario valid? Or should one module's static init never trigger static init in another module?

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  • How to implement an interface member that returns void in F#

    - by Drew Noakes
    Imagine the following interface in C#: interface IFoo { void Bar(); } How can I implement this in F#? All the examples I've found during 30 minutes of searching online show only examples that have return types which I suppose is more common in a functional style, but something I can't avoid in this instance. Here's what I have so far: type Bar() = interface IFoo with member this.Bar = void Fails with FS0010: Unexpected keyword 'void' in expression.

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  • iPhone KeyBoard Reposition

    - by NIL
    Hi all, I want to set position of keyboard when it appears. Can i set this using any API? I didn't want to use private API for that. Actually I want to display tab bar which is place d at bottom of screen.When keyboard appears then it hide the tab bar.So i want to set keyboard position at top of tab bar. Thanks in Advance.

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  • charts loading problem

    - by mary
    hello when we create charts in asp.net mvc is it necessary to use chart control? and if yes then at the time of deployment is it necessary to install chart control? Thank You

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  • How do I include a module in a namespaced class?

    - by snl
    I am having trouble including a module in a namespaced class. The example below throws the error uninitialized constant Bar::Foo::Baz (NameError). What basic piece of Ruby knowledge am I missing here? module Foo module Baz def hello puts 'hello' end end end module Bar class Foo include Foo::Baz end end foo = Bar::Foo.new

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  • Java-script object - get variable name

    - by Mikk
    Hi, To begin with, I'm not even sure, if it is the right way to do it. Let's say, i have script (jquery included) like this: foo = function() { this.bar = function() { alert('I\'m bar'); } this.test = function() { $('body').append('<a onclick="my_var.bar();">Click me</a>'); } this.test(); } var my_var = new foo(); Is there any way, i could make variable "my_var" dynamic inside function "foo". So I could do something like $('body').append('<a onclick="'+the_variable_which_im_assigned_to+'.bar();">Click me</a>'); Thank you

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  • Python overriding class (not instance) special methods

    - by André
    How do I override a class special method? I want to be able to call the __str__() method of the class without creating an instance. Example: class Foo: def __str__(self): return 'Bar' class StaticFoo: @staticmethod def __str__(): return 'StaticBar' class ClassFoo: @classmethod def __str__(cls): return 'ClassBar' if __name__ == '__main__': print(Foo) print(Foo()) print(StaticFoo) print(StaticFoo()) print(ClassFoo) print(ClassFoo()) produces: <class '__main__.Foo'> Bar <class '__main__.StaticFoo'> StaticBar <class '__main__.ClassFoo'> ClassBar should be: Bar Bar StaticBar StaticBar ClassBar ClassBar Even if I use the @staticmethod or @classmethod the __str__ is still using the built in python definition for __str__. It's only working when it's Foo().__str__() instead of Foo.__str__().

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  • Why are my RSpec specs running twice?

    - by James A. Rosen
    I have the following RSpec (1.3.0) task defined in my Rakefile: require 'spec/rake/spectask' Spec::Rake::SpecTask.new(:spec) do |spec| spec.libs << 'lib' << 'spec' spec.spec_files = FileList['spec/**/*_spec.rb'] end I have the following in spec/spec_helper.rb: require 'rubygems' require 'spec' require 'spec/autorun' require 'rack/test' require 'webmock/rspec' include Rack::Test::Methods include WebMock require 'omniauth/core' I have a single spec declared in spec/foo/foo_spec.rb: require File.dirname(__FILE__) + '/../spec_helper' describe Foo do describe '#bar' do it 'be bar-like' do Foo.new.bar.should == 'bar' end end end When I run rake spec, the single example runs twice. I can check it by making the example fail, giving me two red "F"s. One thing I thought was that adding spec to the SpecTask's libs was causing them to be double-defined, but removing that doesn't seem to have any effect.

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  • Spring Transactional Parameterized Test and Autowiring

    - by James Kingsbery
    Is there a way to get a class that extends AbstractTransactionalJUnit4SpringContexts to play nicely with JUnit's own @RunWith(Parameterized), so that fields marked as Autowired get wired in properly? @RunWith(Parameterized) public class Foo extends AbstractTransactionalJUnit4SpringContexts { @Autowired private Bar bar @Parameters public static Collection data() { // return parameters, following pattern in // http://junit.org/apidocs/org/junit/runners/Parameterized.html } @Test public void someTest(){ bar.baz() //NullPointerException } }

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  • SQL Design: representing a default value with overrides?

    - by Mark Harrison
    I need a sparse table which contains a set of "override" values for another table. I also need to specify the default value for the items overridden. For example, if the default value is 17, then foo,bar,baz will have the values 17,21,17: table "things" table "xvalue" name stuff name xval ---- ----- ---- ---- foo ... bar 21 bar ... baz ... If I don't care about a FK from xvalue.name - things.name, I could simply put a "DEFAULT" name: table "xvalue" name xval ---- ---- DEFAULT 17 bar 21 But I like having a FK. I could have a separate default table, but it seems odd to have 2x the number of tables. table "xvalue_default" xval ---- 17 table "xvalue" name xval ---- ---- bar 21 I could have a "defaults table" tablename attributename defaultvalue xvalue xval 17 but then I run into type issues on defaultvalue. My operations guys prefer as compact a representation as possible, so they can most easily see the "diff" or deviations from the default. What's the best way to represent this, including the default value? This will be for Oracle 10.2 if that makes a difference.

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  • Dynamic charts at runtime in SSRS

    - by BALAMURUGAN
    I need to create a report(rdl) in SQL reporting services 2008. In that I need to create in runtime. The report has chart. I will specify the type of chart, font, alignment and all those stuff in runtime. Is there any option for using this in SSRS 2008.

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  • What is the best practice for adding persistence to an MVC model?

    - by etheros
    I'm in the process of implementing an ultra-light MVC framework in PHP. It seems to be a common opinion that the loading of data from a database, file etc. should be independent of the Model, and I agree. What I'm unsure of is the best way to link this "data layer" into MVC. Datastore interacts with Model //controller public function update() { $model = $this->loadModel('foo'); $data = $this->loadDataStore('foo', $model); $data->loadBar(9); //loads data and populates Model $model->setBar('bar'); $data->save(); //reads data from Model and saves } Controller mediates between Model and Datastore Seems a bit verbose and requires the model to know that a datastore exists. //controller public function update() { $model = $this->loadModel('foo'); $data = $this->loadDataStore('foo'); $model->setDataStore($data); $model->getDataStore->loadBar(9); //loads data and populates Model $model->setBar('bar'); $model->getDataStore->save(); //reads data from Model and saves } Datastore extends Model What happens if we want to save a Model extending a database datastore to a flatfile datastore? //controller public function update() { $model = $this->loadHybrid('foo'); //get_class == Datastore_Database $model->loadBar(9); //loads data and populates $model->setBar('bar'); $model->save(); //saves } Model extends datastore This allows for Model portability, but it seems wrong to extend like this. Further, the datastore cannot make use of any of the Model's methods. //controller extends model public function update() { $model = $this->loadHybrid('foo'); //get_class == Model $model->loadBar(9); //loads data and populates $model->setBar('bar'); $model->save(); //saves } EDIT: Model communicates with DAO //model public function __construct($dao) { $this->dao = $dao; } //model public function setBar($bar) { //a bunch of business logic goes here $this->dao->setBar($bar); } //controller public function update() { $model = $this->loadModel('foo'); $model->setBar('baz'); $model->save(); } Any input on the "best" option - or alternative - is most appreciated.

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  • .NET C# Explicit implementation of grandparent's interface method in the parent interface

    - by Cristi Diaconescu
    That title's a mouthful, isn't it?... Here's what I'm trying to do: public interface IBar { void Bar(); } public interface IFoo: IBar { void Foo(); } public class FooImpl: IFoo { void IFoo.Foo() { /*works as expected*/ } //void IFoo.Bar() { /*i'd like to do this, but it doesn't compile*/ } void IBar.Bar() { /*works as expected*/ } } So... Is there a way to declare IFoo.Bar(){...} in my class, other than basically merging the two interfaces into one? And, if not, why?

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  • Financial Charts / Graphs in Ruby or Python

    - by Eric the Red
    What are my best options for creating a financial open-high-low-close (OHLC) chart in a high level language like Ruby or Python? While there seem to be a lot of options for graphing, I haven't seen any gems or eggs with this kind of chart. http://en.wikipedia.org/wiki/Open-high-low-close_chart (but I don't need the moving average or Bollinger bands) JFreeChart can do this in Java, but I'd like to make my codebase as small and simple as possible. Thanks!

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  • MySQL SELECT Statment issue

    - by mouthpiec
    Hi, I have the following query which returns 2 tuples SELECT bar_id, bar_name, town_name, bar_telephone, subscription_type_id, type FROM towns, subscriptiontype, regions, bar LEFT JOIN barpictures bp ON bar.bar_id = bp.bar_id_fk WHERE town_id = town_id_fk AND bar.test_field = 0 AND subscription_type_id = subscription_type_id_fk AND region_id = region_id_fk AND (type like 'logo%' OR type IS NULL) The main difference between the tuples is that one has 'type' = logo and the other tuple has 'type' = logo_large. I need that instead of having two tuples, I need that I have 2 type attributes, one holding the "logo" and the other the "logo_large" eg bar_id, bar_name, town_name, bar_telephone, subscription_type_id, type1, type2 is this possible

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  • C#: How to inherit constructors?

    - by Ian Boyd
    Imagine a base class with many constructors and a virtual method public class Foo { ... public Foo() {...} public Foo(int i) {...} ... public virtual void SomethingElse() {...} ... } and now I want to create a descendant class that overrides the virtual method: public class Bar : Foo { public override void SomethingElse() {...} } And another descendant that does some more stuff: public class Bah : Bar { public void DoMoreStuff() {...} } Do I really have to copy all constructors from Foo into Bar and Bah? And then if I change a constructor signature in Foo, do I have to update it in Bar and Bah? Is there no way to inherit constructors? Is there no way to encourage code reuse?

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  • URLs with query stripped of ampersands appearing in error logs

    - by Jeremy DeGroot
    I've noticed a curious phenomena popping up in my error logs recently. If, as the result of processing a form, I redirect my users to the URL http://www.example.com/index.php?foo=bar&bar=baz, I will see the following two URLs in my log http://www.example.com/index.php?foo=barbar=baz http://www.example.com/index.php?foo=bar&bar=baz The first one is obviously incorrect and will cause my application to redirect to a 404. It always appears first, usually a second before the second one. The 404 page is not doing the redirection, so it appears that the browser is trying both versions. At first, looking at my server logs made me believe it affected only Firefox 3.6.3, but I've found an example of Safari being afflicted as well. It happens fairly intermittently, though it can occur multiple times in a users' session. I've never been able to get it to happen to me. Any thoughts as to the nature of the problem or a solution?

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  • How to insert a new row between two existing rows of MsChart?

    - by Meera
    Hi..Is there any provision to insert a new row between two existing rows of a rangebar chart? If so,please suggest me.Example:Adding a new row at the position where xaxis label equals 2 so that we will get a new row with the axis label as 3(normally in range bar chart type,xaxis representations are taken as yaxis,so here "xaxis label" denotes "yaxis label") .How can i do this?

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  • web2py server-side comments

    - by MikeWyatt
    In a web2py view, how do I comment out server-side code? In ASP.NET, I can surround any HTML or code tags with <%-- and --% and that block will not be compiled or sent to the client. Velocity does the same thing with #* and *#. Is there an equivalent in web2py? ASP.NET <div> <p><%=foo.bar%></p> <%-- don't print twice! <p><%=foo.bar%></p> --%> </div> web2py <div> <p><%=foo.bar%></p> ??? don't print twice! <p><%=foo.bar%></p> ??? </div>

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