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  • Collectable<T> serialization, Root Namespaces on T in .xml files.

    - by Stacey
    I have a Repository Class with the following method... public T Single<T>(Predicate<T> expression) { using (var list = (Models.Collectable<T>)System.Xml.Serializer.Deserialize(typeof(Models.Collectable<T>), FileName)) { return list.Find(expression); } } Where Collectable is defined.. [Serializable] public class Collectable<T> : List<T>, IDisposable { public Collectable() { } public void Dispose() { } } And an Item that uses it is defined.. [Serializable] [System.Xml.Serialization.XmlRoot("Titles")] public partial class Titles : Collectable<Title> { } The problem is when I call the method, it expects "Collectable" to be the XmlRoot, but the XmlRoot is "Titles" (all of object Title). I have several classes that are collected in .xml files like this, but it seems pointless to rewrite the basic methods for loading each up when the generic accessors do it - but how can I enforce the proper root name for each file without hard coding methods for each one? The [System.Xml.Serialization.XmlRoot] seems to be ignored.

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  • Override Django inlineformset_factory has_changed() to always return True

    - by John
    Hi, I am using the django inlineformset_factory function. a = get_object_or_404(ModelA, pk=id) FormSet = inlineformset_factory(ModelA, ModelB) if request.method == 'POST': metaform = FormSet (instance=a, data=request.POST) if metaform.is_valid(): f = metaform.save(commit=False) for instance in f: instance.updated_by = request.user instance.save() else: metaform = FormSet(instance=a) return render_to_response('nodes/form.html', {'form':metaform}) What is happening is that if I change any of the data then everything works ok and all the data gets updated. However if I don't change any of the data then the data is not updated. i.e. only entries which are changed go through the for loop to be saved. I guess this makes sense as there is no point saving data if it has not changed. However I need to go through and save every object in the form regardless of whether it has any changes on not. So my question is how do I override this so that it goes through and saves every record whether it has any changes or not? Hope this makes sense Thanks

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  • Effective Entity Update In Hibernate ?

    - by Tony
    I've always wanted to know How can I update an entity effectively in hibernate just as by using SQL. For example : I have a product entity , has a field name createTime , when I use session.saveOrUpdate(product) ; I have to get this field from database and then set to product then update , actually whenever I use session.saveOrUpdate() , I updated ALL fileds , even if I just need update only one field. but most time the value object we passed to DAO layer can't contain all fileds information , like the createDate in Product , we seldom need to update this field. How to just update selected fields ? Of course I can use HQL , but that will separate save and update logic . It would be better If Hibernate has a method like this : session.updateOnlyNotNullFields(product); How can I do this in Hibernate ?

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  • iphone app photo upload to server from app threads

    - by user290380
    I have an app that needs to upload a least 5 photos to a server using API call available with the server. For that I am planning to use threads which will take care of photo upload and the main process can go on with the navigation of views etc. What I cant decide is whether it is OK to spawn five separate threads in iphone or use a single thread that will do the upload. In the later cases obviously it will become quite slow. Basically an HTTP POST request will be made to the server with the NSMutableURLRequest object using NSCOnnection. More threads mean more complexity and sync issues, but I can try to write code as neat as possible if it means better performance than a single thread which is simple but is a real stopper if performance is considered. Anybody with any experience in this kinda app. ??

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  • Referencing other modules in atexit

    - by Dmitry Risenberg
    I have a function that is responsible for killing a child process when the program ends: class MySingleton: def __init__(self): import atexit atexit.register(self.stop) def stop(self): os.kill(self.sel_server_pid, signal.SIGTERM) However I get an error message when this function is called: Traceback (most recent call last): File "/usr/lib/python2.5/atexit.py", line 24, in _run_exitfuncs func(*targs, **kargs) File "/home/commando/Development/Diploma/streaminatr/stream/selenium_tests.py", line 66, in stop os.kill(self.sel_server_pid, signal.SIGTERM) AttributeError: 'NoneType' object has no attribute 'kill' Looks like the os and signal modules get unloaded before atexit is called. Re-importing them solves the problem, but this behaviour seems weird to me - these modules are imported before I register my handler, so why are they unloaded before my own exit handler runs?

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  • Internal scala compilation. Working with interactive.Global

    - by scout
    I am trying to retrieve the AST from scala souce file. I have simplified the code (only relevant code) to following. trait GetAST { val settings = new Settings val global = new Global(settings, new ConsoleReporter(settings)) def getSt = "hello" //global.typedTree(src, true) } object Tre extends GetAST { def main(args:Array[String]) { println(getSt.getClass) println("exiting program") } } The above code compiles fine and runs fine. But the problem is the program does not exit. The prompt is not displayed after printing "exiting program". I have to use ^c to exit. Any idea what the problem might be

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  • Insert objects into a collection with LINQ based on a property of the existing objects in the collection

    - by DavidS
    Hi, I've got a collection of object which contains data as follows: FromTime Duration 2010-12-28 24.0000 2010-12-29 24.0000 2010-12-30 24.0000 2010-12-31 22.0000 2011-01-02 1.9167 2011-01-03 24.0000 2011-01-04 24.0000 2011-01-05 24.0000 2011-01-06 24.0000 2011-01-07 22.0000 2011-01-09 1.9167 2011-01-10 24.0000 In the "FromTime" column, there are data "gaps" i.e. 2011-01-01 and 2011-01-08 are "missing". So what I'd like to do is to loop through a range of dates (in this instance 2010-12-28 to 2011-01-10) and "fill in" the "missing" data with a duration of 0. As I've just started with LINQ, I feel that it should be "fairly" easy but I can't quite get it right. I'm reading the book "LINQ in Action" but feel that I'm still quite a way off before I can resolve this particular issue. So any help would be much appreciated. David

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  • undefined reference to static member variable

    - by Max
    Hi. I have this class that has a static member. it is also a base class for several other classes in my program. Here's its header file: #ifndef YARL_OBJECT_HPP #define YARL_OBJECT_HPP namespace yarlObject { class YarlObject { // Member Variables private: static int nextID; // keeps track of the next ID number to be used int ID; // the identifier for a specific object // Member Functions public: YarlObject(): ID(++nextID) {} virtual ~YarlObject() {} int getID() const {return ID;} }; } #endif and here's its implementation file. #include "YarlObject.hpp" namespace yarlObject { int YarlObject::nextID = 0; } I'm using g++, and it returns three undefined reference to 'yarlObject::YarlObject::nextID linker errors. If I change the ++nextID phrase in the constructor to just nextID, then I only get one error, and if I change it to 1, then it links correctly. I imagine it's something simple, but what's going on?

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  • ASP.net web page still displaying cached versions

    - by user279521
    My web page is still displaying a previously cached versions of the page. I have this in the page_load event: Response.Clear(); Response.Buffer = true; Response.ExpiresAbsolute = DateTime.Now.AddDays(-1d); Response.Expires = -1; Response.CacheControl = "no-cache"; Response.Cache.SetCacheability(HttpCacheability.NoCache); I have this in the Page_Init: protected void Page_Init(object Sender, EventArgs e) { Response.Cache.SetCacheability(HttpCacheability.NoCache); Response.Cache.SetExpires(DateTime.Now.AddDays(-1)); } Any idea what I might be missing?

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  • Trick to getting initWithNibFile to be invoked?

    - by PhazeZero
    I've implemented a View Controller, and I'm trying to do some very basic initialization in initWithNibFile...which I understand to be the designated initializer for View Controller objects. I've tried to put breakpoints on the code, and have put very simple NSLog statements into it as well. Regardless...I'm not seeing it be executed (and the object i'm attempting to alloc/init inside the function is also not being allocated - so I'm about 99% sure I'm not hitting the code. Is there something I need to do elsewhere to cause this method to be invoked? I'm getting a clean build, no warnings or errors. And the app successfully loads up the View, and I can invoke a ButtonClick method I've coded and connected to this same View Controller. Any suggestions would be appreciated. TC

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  • C# Inherited member variables behaving undexpectedly

    - by Nilbert
    If I have a class like this: class A { public string fe = "A"; } And a class that inherits from it like so: class B : A { public string fe = "B"; } Visual C++ will tell me that B.fe hides A.fe so I should use the new keyword. So I change class B to look like: class B : A { public new string fe = "B"; } And then I have a function that takes an A (but, by virtue of inheritance, will also take a B) like this: class D { public static void blah(A anAObject) { Console.Writeline(A.fe); } } Even when I pass it an instance of a B object, which it will take without question, it will print "A"! Why is this, and how can I make it work how I want without setting the variable in the constructor?

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  • Getting .NET schema for a stored procedure result

    - by PHeiberg
    I have a couple of stored procedures in T-SQL where each stored procedure has a fixed schema for the result set. I need to map the result sets for each procedure to a POCO object and need the column name and type for each column in the result set. Is there a quick way of accessing the information? The best way I have found so far is accessing each stored procedure from .NET and writing my own extension method on a IDataReader/IDataRecord for dumping the information (column names and types) out. Example, a stored procedure executing the following query: SELECT Id, IntField, NullableIntField, VarcharField, DateField FROM SomeTable would require me to have the mapping information: Id - Guid IntField - System.Int32 NullableIntField - Nullable<System.Int32> VarcharField - String DateField - DateTime

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  • Why is the 'this' keyword not a reference type in C++ [closed]

    - by Dave Tapley
    Possible Duplicates: Why ‘this’ is a pointer and not a reference? SAFE Pointer to a pointer (well reference to a reference) in C# The this keyword in C++ gets a pointer to the object I currently am. My question is why is the type of this a pointer type and not a reference type. Are there any conditions under which the this keyword would be NULL? My immediate thought would be in a static function, but Visual C++ at least is smart enough to spot this and report static member functions do not have 'this' pointers. Is this in the standard?

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  • Find a control by String from asp.net Web service

    - by jphenow
    Well since it seems relatively difficult to send the object of a WebControl over JSON using jquery.ajax() I've decided to send the name of the control as a string because I know how to do that. Then I promptly realized that, from a web service, I don't actually know how to search for a control by ID name. Since its a service I can't seem to get Control.FindControl() to work so does anyone have ideas or suggestions? All I'm trying to do is call a databind() on my radcombobox. Thanks in advance! For any of you that knows anything about asp.net/rad controls - I'm basically updating a database and want the radcombobox to be in sync with that database again after adding something, before I autoselect what was just added. Other than databind do i have to call anything to refresh that list? Thanks again!

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  • Display xml data in silverlight datagrid, vb.net

    - by Aishwarya
    I want to display an xml file data in silverlight datagrid. im using the below code but it doesnt work.Please help. My vb.net code: Imports System Imports System.Collections.Generic Imports System.Linq Imports System.Windows Imports System.Windows.Controls Imports System.Xml.Linq Namespace SilverlightApplication1 Public Partial Class Page Inherits UserControl Public Sub New() InitializeComponent() End Sub Private Sub Page_Loaded(ByVal sender As Object, ByVal e As RoutedEventArgs) DataGrid1.ItemsSource = GetPunchReport() End Sub Public Function GetStatusReport() As List(Of Table) Dim statusReport As New List(Of Table)() Dim doc As XElement = XElement.Load("Data/PunchReport.xml") report = (From row In doc.Elements() _ Select GetStatus(row)).ToList() Return statusReport End Function Private Function GetReport(ByVal row As XElement) As Table Dim s As New Table() s.JobID= row.Attribute("JobID").Value s.VenueName= row.Attribute("VenueName").Value) Return s End Function End Class End Namespace

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  • Garbage Collection in Java

    - by simion
    On the slides I am revising from it says the following: Live objects can be identified either by maintaining a count of the number of references to each object, or by tracing chains of references from the roots. Reference counting is expensive – it needs action every time a reference changes and it doesn’t spot cyclical structures, but it can reclaim space incrementally. Tracing involves identifying live objects only when you need to reclaim space – moving the cost from general access to the time at which the GC runs, typically only when you are out of memory. I understand the principles of why reference counting is expensive but do not understand what "doesn’t spot cyclical structures, but it can reclaim space incrementally." means. Could anyone help me out a little bit please? Thanks

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  • Question about domain models & their visibility...

    - by Another SO User
    I was involved in an interesting debate about the visibility of domain models & was wondering if people here have any good guidance. Per my understanding of MDA, we need not expose the domain model throughout the application layers & tiers The reason being that any change to the domain model has an impact in the overall application The wise thing to do would be to expose light-weight object (DTO's) which are a small sub-set of the domain model to abstract the actual model On the flip side, any change to the domain model would mean changing various DTO's throughout the application for the change to be visible, while if we do expose the domain model, then the change is in a single location Hope to see some comments & thoughts about this. Appreciate all the help!

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  • .net, C# Interface between Business Logic and DAL

    - by Joel
    I'm working on a small application from scratch and using it to try to teach myself architecture and design concepts. It's a .NET 3.5, WPF application, and I'm using Sql Compact Edition as my data store. I'm working on the business logic layer, and have just now begun to write the DAL. I'm just using SqlCeComamnds to send over simple queries and SqlCeResultSet to get at the results. I'm starting to design my Insert and Update methods, and here's the issue - I don't know the best way to get the necessary data from the BLL into the DAL. Do I pass in a generic collection? Do I have a massive parameter list with all the data for the database? Do I simply pass in the actual business object (thus tying my DAL to the conrete stuff in the BLL?). I thought about using interfaces - simply passing IBusinessObjectA into the DAL, which provides the simplicity I'm looking for without tying me TOO tightly to current implementations. What do you guys think?

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  • WithEvents LinkedList is it Impossible?

    - by serhio
    What is the optimal approach to a WithEvents Collection - VB.NET? Have you any remarks on the code bellow (skipping the Nothing verifications)? The problem is when I obtain the LinkedListNode(Of Foo) in a For Each block I can set myNode.Value = something, and here is a handlers leak... -Could I override the FooCollection's GetEnumerator in this case? -No. :( cause NotInheritable Class LinkedListNode(Of T) Class Foo Public Event SelectedChanged As EventHandler End Class Class FooCollection Inherits LinkedList(Of Foo) Public Event SelectedChanged As EventHandler Protected Overloads Sub AddFirst(ByVal item As Foo) AddHandler item.SelectedChanged, AddressOf OnSelectedChanged MyBase.AddFirst(item) End Sub Protected Overloads Sub AddLast(ByVal item As Foo) AddHandler item.SelectedChanged, AddressOf OnSelectedChanged MyBase.AddLast(item) End Sub ' ------------------- ' Protected Overloads Sub RemoveFirst() RemoveHandler MyBase.First.Value.SelectedChanged, _ AddressOf OnSelectedChanged MyBase.RemoveFirst() End Sub Protected Overloads Sub RemoveLast(ByVal item As Foo) RemoveHandler MyBase.Last.Value.SelectedChanged, _ AddressOf OnSelectedChanged MyBase.RemoveLast() End Sub ' ------------------- ' Protected Sub OnSelectedChanged(ByVal sender As Object, ByVal e As EventArgs) RaiseEvent SelectedChanged(sender, e) End Sub End Class

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  • How can I call an Actionscript function when the .swf is referenced by jQuery?

    - by Arms
    I have an .swf that I am embedding into HTML using the jQuery SWF Object plugin (http://jquery.thewikies.com/swfobject). I have a number of functions within the .swf that I need to call from within javascript functions. I've made these actionscript functions accessible to javascript by calling flash.external.ExternalInterface.addCallback(). Yet nothing happens when I make the call. I've had this happen before and it seems to be that when you reference the .swf from jQuery, you can't call flash functions. Is there anyway around this (aside from not using jQuery)? Thanks.

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  • How to create a reusable form using COCOA bindings.

    - by Juliano Sott
    hi. I want to make a user interface in which the user can edit two objects at the same time. The main window would have a vertical split view and a form on each side of the view. The problem is that the two forms are identical and I don't want to duplicate the view components in the interface builder. I want to create the form one time and add a reference to it in each side of the split view, each one using a different object source. I could use a NSForm, but the form is not a simple grid of outputTexts and inputText. They have a master table, and diverse kinds of inputs types, like combos, in the detail. How do I create the reusable form using the interface builder? Or how can I do it programmatically? Do I have to create a subclass of NSView and add the individual components in the code? Thanks, Juliano

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  • Using PowerShell class to invoke a "[namespace.class]::method" style command

    - by Marco
    Hello, I created a powershell object via .net to invoke commands. When I invoke normal commands like 'Get-Process' I had no problems: ps.AddCommand("Get-Process").AddParameter(...).Invoke() but I'm not able to invoke a .net method with the syntax "[namespace.class]::method", just to make an example to invoke [System.IO.File]::Exists("c:\boo.txt"). I tried with ps.AddCommand("[System.IO.File]::Exists(\"c:\\boo.txt\")").Invoke() ps.AddCommand("[System.IO.File]::Exists").AddArgument("c:\\boo.txt").Invoke() and some others. It always throws an exception which says that the command specified is not recognized. There is a way to invoke that type of command? Thanks

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  • Where does ASP.Net get its rendered IDs from?

    - by NeilD
    Hi, I've inherited a project with some nasty JavaScript that depends on hard coded object ids. i.e. There are lots of places where it does things like this var magazine = document.getElementById('repModuleDisplay__ctl3_chkCats_0'); When the page renders in my UAT environment, the HTML looks like this, and everything works OK. <input id="repModuleDisplay__ctl3_chkCats_0" type="checkbox" name="repModuleDisplay:_ctl3:chkCats:0" ... etc However, when I put it on my Production environment, the HTML is suddenly rending like this: <input id="repModuleDisplay_ctl03_chkCats_0" type="checkbox" name="repModuleDisplay$ctl03$chkCats$0" ... etc The difference in ids means that the JavaScript can't find the Element, and fails. In an ideal world, I'd scrap the buggy JavaScript and do it again properly, but for a quick fix, I'd like to know what is causing the difference in rendering between the two environments. Does anyone have any ideas? Thanks, Neil

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  • Accesing Label.text in DataList

    - by Itay Gurvich
    So im trying to access informtaion from a label inside the DataList by pressing a button inside it. I put a code in thusly: protected void DataList1_SelectedIndexChanged(object sender, EventArgs e) { Character character = (Character)Session["character"]; Label lbl = (Label)DataList1.SelectedItem.FindControl("lblName"); int SkillID = int.Parse(DAL.ExecuteScalar("SELECT SkillID FROM skills WHERE SkillName = '" + lbl.ToString() + "'").ToString()); DAL.ExecuteNonQuery("INSERT INTO AssignedSkills (Offensive) Values ('" + SkillID.ToString() + "') WHERE CharID = '" + character.get_name().ToString() + "'"); } when i press the button its not even getting there and im getting an error "Invalid postback or callback argument." how can i access it?

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  • dropdown list selected index changed

    - by KareemSaad
    I did my drop down list that get it,s values from database and when run the application it didnot work and compiler didnot see the code onselectedindexchanged="DDlProductFamily_SelectedIndexChanged" protected void DDlProductFamily_SelectedIndexChanged(object sender, EventArgs e) { using (SqlConnection Con = Connection.GetConnection()) { SqlCommand Com = new SqlCommand("SelectThumbByProductFamily", Con); Com.CommandType = CommandType.StoredProcedure; Com.Parameters.Add(Parameter.NewInt("@ProductCategory_Id", DDlProductFamily.SelectedValue.ToString())); SqlDataAdapter DA = new SqlDataAdapter(Com); DA.Fill(dt); DataList1.DataSource = dt; DataList1.DataBind(); } }

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