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  • HierarchicalDataTemplate Distinct leaves

    - by miguel
    I have a set of data that is structured like this: ItemA.GroupA ItemB.GroupA ItemC.GroupB ItemD.GroupC I need to present the data in a WPF Tree View like this: GroupA --- ItemA --- ItemB GroupB --- ItemC GroupC --- ItemD What XAML can I use to group the leaves by distinct value? For instance, there could be multple items in the collection which are GroupA.ItemA, however, I only want to present the node and leaf once.

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  • Parent child class relationship design pattern

    - by Jeremy
    I have a class which has a list of child items. Is there a design pattern I can copy that I can apply to these classes so that I can access the parent instance from the child, and it enforces rules such as not being able to add the child to multiple parents, etc?

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  • What's the workflow of Continuous Integration With Hudson?

    - by Satoru.Logic
    Hi, all. I am referred to Hudson today. I have heard about continuous integration before, but I have no idea what the heck is a ci-server. Hudson is really easy to install in Ubuntu and in several minutes I managed to set up an instance of it. But I don't quite understand the workflow of a ci-server, or how am I supposed to use it? Please tell me if you have experience about ci, thanks in advance.

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  • Difficulty adding widgets to django form.

    - by codingJoe
    I have a django app that tracks activities that can benefit a classroom. Using the django examples, I was able to build a form to enter this data. But when I try to add widgets to that form, things get tricky. What I want is a calendar widget that lets the user enter the 'activity_date' field using a widget. If I use Admin interface. The AdminDateWidget works fine. however. This particular user isn't allowed access to the admin interface so I need a different way to present this widget. Also I couldn't figure out how to make the bring the admin widget over into non-admin pages. So I tried a custom widget. This is the first custom widget I've built, so I'm not quite sure what is supposed to be going on here. Any Expert Advice? How do I get my date widget to work? # The Model class Activity(models.Model): activity_date = models.DateField() activity_type = models.CharField(max_length=50, choices=ACTIVITY_TYPES) activity_description = models.CharField(max_length=200) activity_duration= models.DecimalField(decimal_places=2, max_digits=4) est_attendance = models.IntegerField("Estimated attendance") # The Form class ActivityForm(forms.ModelForm): # The following line causes lockup if enabled. # With the DateTimeWidget removed, the form functions correctly except that there is no widget. #activity_date = forms.DateField(label=_('Date'), widget=DateTimeWidget) ##!!! Point of Error !!! class Meta: model = Activity fields = ('activity_date', 'activity_type', 'activity_description', 'activity_duration', 'est_attendance') def __init__(self, *args, **kwargs): super(ActivityForm, self).__init__(*args, **kwargs) instance = getattr(self, 'instance', None) edit_aid = kwargs.get('edit_aid', False) # On a different approach, the following also didn't work. #self.fields['activity_date'].widget = widgets.AdminDateWidget() # The Widget # Example referenced: http://djangosnippets.org/snippets/391/ calbtn = u""" <button id="calendar-trigger">...</button> <img src="%s/site_media/images/icon_calendar.gif" alt="calendar" id="%s_btn" style="cursor: pointer; border: 1px solid #8888aa;" title="Select date and time" onmouseover="this.style.background='#444444';" onmouseout="this.style.background=''" /> <script type="text/javascript"> Calendar.setup({ trigger : "calendar-trigger", inputField : "%s" }); </script>""" class DateTimeWidget(forms.widgets.TextInput): dformat = '%Y-%m-%d %H:%M' def render(self, name, value, attrs=None): print "DTWgt render name=%s, value=%s" % name, value if value is None: value = '' final_attrs = self.build_attrs(attrs, type=self.input_type, name=name) if value != '': try: final_attrs['value'] = \ force_unicode(value.strftime(self.dformat)) except: final_attrs['value'] = \ force_unicode(value) if not final_attrs.has_key('id'): final_attrs['id'] = u'%s_id' % (name) id = final_attrs['id'] jsdformat = self.dformat #.replace('%', '%%') cal = calbtn % (settings.MEDIA_URL, id, id, jsdformat, id) a = u'<input%s />%s' % (forms.util.flatatt(final_attrs), cal) print "render return %s " % a return mark_safe(a) def value_from_datadict(self, data, files, name): print "DTWgt value_from_datadict" dtf = forms.fields.DEFAULT_DATETIME_INPUT_FORMATS empty_values = forms.fields.EMPTY_VALUES value = data.get(name, None) if value in empty_values: return None if isinstance(value, datetime.datetime): return value if isinstance(value, datetime.date): return datetime.datetime(value.year, value.month, value.day) for format in dtf: try: return datetime.datetime(*time.strptime(value, format)[:6]) except ValueError: continue return None

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  • Height of Text in Flex

    - by kevin
    How can you get the height of the Text component that's been created dynamically from ActionScript. For instance, if you have something like: var temp:Text = new Text; temp.width = 50; temp.text = "Simple text"; how to get height of temp?

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  • Anyone have experience calling Rake from MSBuild for code gen and other benefits? How did it go? Wha

    - by Charlie Flowers
    While programming in C# using Visual Studio 2008, I often wish for "automatic" code generation. If possible, I'd like to achieve it by making my MSBuild solution file call out to Rake, which would call Ruby code for the code generation, having the resulting generated files automatically appear in my solution. Here's one business example (of many possible examples I could name) where this kind of automatic code generation would be helpful. In a recent project I had an interface with some properties that contained dollar amounts. I wanted a second interface and a third interface that had the same properties as the first interface, except they were "qualified" with a business unit name. Something like this: public interface IQuarterlyResults { double TotalRevenue { get; set; } double NetProfit { get; set; } } public interface IConsumerQuarterlyResults { double ConsumerTotalRevenue { get; set; } double ConsumerNetProfit { get; set; } } public interface ICorporateQuarterResults { double CorporateTotalRevenue { get; set; } double CorporateNetProfit { get; set; } } In this example, there is a "Consumer Business Unit" and a "Corporate Business Unit". Every property on IQuarterlyResults becomes a property called "Corporate" + [property name] on ICorporateQuarterlyResults, and likewise for IConsumerQuarterlyResults. Why make interfaces for these, rather than merely having an instance of IQuarterlyResults for Consumer and another instance for Corporate? Because, when working with the calculator object I was building, the user had to deal with 100's of properties, and it is much less confusing if he can deal with "fully qualified" property names such as "ConsumerNetProfit". But let's not get bogged down in this example. It is only an example and not the main question. The main question is this: I love using Ruby and ERB for code generation, and I love using Rake to manage dependencies between tasks. To solve the problem above, what I'd like to do is have MSBuild call out to Rake, and have Rake / Ruby read the list of properties on the "core" interface and then generate the code to make all the dependent interfaces and their properties. This would get triggered every time I do a build, because I'd put it into the MSBuild file for the VS.NET solution. Has anyone tried anything like this? How did it work out for you? What insights can you share about pros, cons, tips for success, etc.? Thanks!

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  • Installation doesn't recognize SQL server 2008 saying Server components not found

    - by Aarthi
    Please answer these 2 questions: Our installation is not recognising the SQL server 2008 and if we try to create a DB, its telling Server components not found. Please tell what may be the issue and why it's not recognising. But our installation proceeds as client installation(if i point to the same instance with DB already created) without any issues. Can we install SQL express 2005 in a machine where SQL server 2008 is already installed. Please clarify.

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  • How to select records as columns in SQL

    - by Leigh
    Hi, I have two tables: tblSizes and tblColors. tblColors has columns called ColorName, ColorPrice and SizeID. There is one size to multiple colors. I need to write a query to select the size and all the colors (as columns) for a that size with the price of each size in its respective column. The colors must be returned as columns, for instance: SizeID : Width : Height : Red : Green : Blue 1---------220-----220----£15----£20-----£29 Hope this makes sense Thank you

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  • Find Control In Datalist

    - by KareemSaad
    When I tried To Find Control n data List As I Mentioned Below Error(Object reference not set to an instance of an object. I cannot know protected void dlCategory_ItemDataBound(object sender, DataListItemEventArgs e) { Label Lb = (Label)e.Item.FindControl("LblCat"); Lb.ForeColor = System.Drawing.Color.Red; } ' onitemcreated="dlSubCategory_ItemCreated" onitemdatabound="dlSubCategory_ItemDataBound" ' class="buttn_txt" '

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  • code style for private methods in c#

    - by illdev
    I just found out, that it seems a common pattern to user UpperFirstLetterPascalCase() for private methods. I for myself, find this completely inconsistent with naming rules of private instance fields and variables and I find it difficult to read/debug, too. I would want to ask, why using a first upper letter for methods could be a better choice than a first lower (doThis())? Just out of curiosity...

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  • How many ways a java Program can end ?

    - by Frank
    I know use System.exit(0) can end a java program, for instance, if I have a JFrame window, it will close and end the program, but I wonder how many other ways, can it be closed and the program be ended ? Including when an error occurs, will the program be shut down and the JFrame be closed ?

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  • nHibernate: limit the result set of a mapped collection

    - by HeavyWave
    How do you limit the result set of a mapped collection in nHibernate? For instance: Model.Items; will always return all the Items for the given Model. Is there any way to force it to return only, say, 20 Items without creating a specific query ? Something like Model.Items.SetMaxResults(20); In other words, I would like nHibernate to return IQueryable instead of a simple IList, when I access a collection.

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  • Singleton & Multi-threading

    - by ronan
    Friends I have the following class that class Singleton { private: static Singleton *p_inst; Singleton(); public: static Singleton * instance() { if (!p_inst) { p_inst = new Singleton(); } return p_inst; } }; Please do elaborate on precautions taken while implementing Singleton in multi-threaded environment .. Many thanks

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  • Searching via Tags in SharePoint 2010

    - by Ben
    Is it possible to search on Tags within SharePoint 2010? I know you can refine your search based on Tag (Search for a keyword, then filter by Tags) and you can use the "Tag Cloud", but that doesnt let you search by more then one Tag. How would I for instance, search for some documents that I have tagged as "Technical" and "Internal", and return all items tagged with both of those tags?

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  • Using the standard Flash AS3 scrollbar class

    - by WebDevHobo
    Flash has a scrollbar class, documented here: http://help.adobe.com/en_US/AS3LCR/Flash_10.0/fl/controls/ScrollBar.html However, besides listing functions and variables, there's no real explanation of how to hook an instance of this class to a textfield. Everything I've tried either ends up in errors or the scrollbar not showing. The documentation lacks a clear way of how you should bind the textfield and the scrollbar toghether, and CS4 isn't providing any help either. Can someone explain, or link to an example of how scrollbars work with textfield?

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  • does the object creating a sub appdomain get instantiated in that sub appdomain?

    - by Eric
    does the object creating a sub appdomain get instantiated in that sub appdomain? I have an object that is in the main AppDomain and it is creating another AppDomain and it requires the calling class to be serializable and is creating an instance of the calling class in the new sub AppDomain. I'm wondering if that is how it is, or if there is a way that I can create the sub appDomain but still hold on to the original instantiation of the calling object in the main appDomain

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  • display one-to-many relationship for a model in Django admin (list mode)

    - by theactiveactor
    In Django admin site, when listing all the objects for a given model, I know we can customize which columns get displayed for a ModelA via list_display Say that ModelA has a one-to-many relationship with ModelB. I would like to add another column on the listing page for ModelA, where each entry is a URL pointing to all objects of ModelB having a foreign key relationship on corresponding instance of Model A in that row. How can I achieve this customization with the admin app?

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  • Best point to overwrite the navigationBar property of navigationController

    - by flohei
    Hi there, I'm overwriting UINavigationController to replace the default navigationBar property with an instance of my own subclass of UINavigationBar. So I tried something like _navigationBar = [[SBNavigationBar alloc] init]; in my -initWithRootViewController:. But that didn't work out as I expected it. There's still the default navigationBar being displayed. So what's the best point to overwrite the navigationBar? Thanks in advance –f

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  • How to iterate all query paths within an image header namespace in WIC?

    - by muruge
    Hello All, I am using Windows Imaging Component to read/write image metadata in my WPF application. I would like to know if there is an efficient way to know if any paths exist within a namespace. For instance I would like to know if any paths within IPTC namespace exist and if not I want to delete the namespace from the image header. Any pointers would be greatly appreciated. Thanks, Murugesh.

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  • Is there simple way how to join two RouteValueDictionary values to pass parameters to Html.ActionLin

    - by atagaew
    Hi. Look on my code that i created in a partial View: <% foreach (Customer customerInfo in Model.DataRows) {%> <tr> <td> <%=Html.ActionLink( customerInfo.FullName , ((string)ViewData["ActionNameForSelectedCustomer"]) , JoinParameters(customerInfo.id, (RouteValueDictionary) ViewData["AdditionalSelectionParameters"]) , null)%> </td> <td> <%=customerInfo.LegalGuardianName %> </td> <td> <%=customerInfo.HomePhone %> </td> <td> <%=customerInfo.CellPhone %> </td> </tr> <%}%> Here I'm building simple table that showing customer's details. As you may see, in each row, I'm trying to build a link that will redirect to another action. That action requires customerId and some additional parameters. Additional parameters are different for each page where this partial View is using. So, i decided to make Action methods to pass that additional parameters in the ViewData as RouteValueDictionary instance. Now, on the view i have a problem, i need to pass customerId and that RouteValueDictionary together into Html.ActionLink method. That makes me to figure out some way of how to combine all that params into one object (either object or new RouteValueDictionary instance) Because of the way the MVC does, i can't create create a method in the codebehind class (there is no codebihind in MVC) that will join that parameters. So, i used ugly way - inserted inline code: ...script runat="server"... private RouteValueDictionary JoinParameters(int customerId, RouteValueDictionary defaultValues) { RouteValueDictionary routeValueDictionary = new RouteValueDictionary(defaultValues); routeValueDictionary.Add("customerId", customerId); return routeValueDictionary; } ...script... This way is very ugly for me, because i hate to use inline code in the View part. My question is - is there any better way of how i can mix parameters passed from the action (in ViewData, TempData, other...) and the parameter from the view when building action links. May be i can build this link in other way ? Thanks!

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  • Is ToString() optimized by compiler?

    - by TheVillageIdiot
    Suppose I've following Code: Console.WriteLine("Value1: " + SomeEnum.Value1.ToString() + "\r\nValue2: " + SomeOtherEnum.Value2.ToString()); Will Compiler Optimize this to: Console.WriteLine("Value1: " + SomeEnum.Value1 + "\r\nValue2: " + SomeOtherEnum.Value2); I've checked it with IL Disassembler and there are calls to IL_005a: callvirt instance string [mscorlib]System.Object::ToString() I don't know if JIT optimizes this.

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  • const object and const constructor

    - by Muhammad alaa
    Is there any way to know if an object is a const object or regular object, for instance consider the following class class String { String(const char* str); }; if user create a const object from String then there is no reason to copy the passed native string and that because he will not make any manipulation on it, the only thing he will do is get string size, string search and other functions that will not change the string.

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