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• How do I use WS-Security with WCF?

  - by Jonathan Allen

  Below is the style of header I need to create. I am expected to use either a public/private key or a SSL style certificate. I don't know for certain, but I think my counter-party is using some form of Java. <soap-env:Header> <wsse:Security xmlns:wsse="http://schemas.xmlsoap.org/ws/2002/04/secext"> <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#"> <ds:SignedInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#"> <ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#" /> <ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" /> <ds:Reference URI="#secinfo"> <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" /> <ds:DigestValue>xxxxxxxxxxxxx</ds:DigestValue> <ds:Transforms> <ds:Transform Algorithm="http://www.w3.org/TR/1999/REC-xpath-19991116"> <ds:XPath>//*[@id='secinfo']/child::*/text()</ds:XPath> </ds:Transform> </ds:Transforms> </ds:Reference> </ds:SignedInfo> <ds:SignatureValue>xxxxxxxxxxds:SignatureValue> <ds:KeyInfo> <ds:KeyName>xxxxxxx</ds:KeyName> </ds:KeyInfo> </ds:Signature> <t:UsernameToken xmlns:t="http://schemas.xmlsoap.org/ws/2002/04/secext" id="secinfo"> <t:UserInfo>USER=xxxx;CORR=xxxx;TIMESTAMP=201003161916</t:UserInfo> </t:UsernameToken> </wsse:Security> </soap-env:Header>

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• maintaining a large list in python

  - by Oren

  I need to maintain a large list of python pickleable objects that will quickly execute the following algorithm: The list will have 4 pointers and can: Read\Write each of the 4 pointed nodes Insert new nodes before the pointed nodes Increase a pointer by 1 Pop nodes from the beginning of the list (without overlapping the pointers) Add nodes at the end of the list The list can be very large (300-400 MB), so it shouldnt be contained in the RAM. The nodes are small (100-200 bytes) but can contain various types of data. The most efficient way it can be done, in my opinion, is to implement some paging-mechanism. On the harddrive there will be some database of a linked-list of pages where in every moment up to 5 of them are loaded in the memory. On insertion, if some max-page-size was reached, the page will be splitted to 2 small pages, and on pointer increment, if a pointer is increased beyond its loaded page, the following page will be loaded instead. This is a good solution, but I don't have the time to write it, especially if I want to make it generic and implement all the python-list features. Using a SQL tables is not good either, since I'll need to implement a complex index-key mechanism. I tried ZODB and zc.blist, which implement a BTree based list that can be stored in a ZODB database file, but I don't know how to configure it so the above features will run in reasonable time. I don't need all the multi-threading\transactioning features. No one else will touch the database-file except for my single-thread program. Can anyone explain me how to configure the ZODB\zc.blist so the above features will run fast, or show me a different large-list implementation?

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• Rails 3 - yield return or callback won't call in view <%= yield(:sidebar) || render('shared/sidebar'

  - by rzar

  Hey folks, I'm migrating a Website from Rails 2 (latest) to Rails 3 (beta2). Testing with Ruby 1.9.1p378 and Ruby 1.9.2dev (2010-04-05 trunk 27225) Stuck in a situation, i don't know which part will work well. Suspect yield is the problem, but don't know exactly. In my Layout Files I use the following technique quite often: app/views/layouts/application.html.erb: <%= yield(:sidebar) || render('shared/sidebar') %> For Example the partial look like: app/views/shared/_sidebar.html.erb: <p>Default sidebar Content. Bla Bla</p> Now it is time for the key part! In any view, I want to create a content_for block (optional). This can contain a pice of HTML etc. example below. If this block is set, the pice HTML inside should render in application.html.erb. If not, Rails should render the Partial at shared/_sidebar.html.erb on the right hand side. app/views/books/index.html.erb: <% content_for :sidebar do %> <strong>You have to read REWORK, a book from 37signals!</strong> <% end %> So you've got the idea. Hopefully. This technique worked well in any Rails 2.x Application. Now, in Rails 3 (beta2) only the yield Part is working. || render('shared/sidebar') The or side will not process by rails or maybe ruby. Thanks for input and time!

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• How to clean-up an Entity Framework object context?

  - by Daniel Brückner

  I am adding several entities to an object context. try { forach (var document in documents) { this.Validate(document); // May throw a ValidationException. this.objectContext.AddToDocuments(document); } this.objectContext.SaveChanges(); } catch { // How to clean-up the object context here? throw; } If some of the documents pass the the validation and one fails, all documents that passed the validation remain added to the object context. I have to clean-up the object context because it may be reused and the following can happen. var documentA = new Document { Id = 1, Data = "ValidData" }; var documentB = new Document { Id = 2, Data = "InvalidData" }; var documentC = new Document { Id = 3, Data = "ValidData" }; try { // Adding document B will cause a ValidationException but only // after document A is added to the object context. this.DocumentStore.AddDocuments(new[] { documentA, documentB, documentC }); } catch (ValidationException) { } // Try again without the invalid document B. this.DocumentStore.AddDocuments(new[] { documentA, documentC }); This will again add document A to the object context and in consequence SaveChanges() will throw an exception because of a duplicate primary key. So I have to remove all already added documents in the case of an validation error. I could of course perform the validation first and only add all documents after they have been successfully validated. But sadly this does not solve the whole problem - if SaveChanges() fails all documents still remain add but unsaved. I tried to detach all objects returned by this.objectContext.ObjectStateManager.GetObjectStateEntries(EntityState.Added) but I am getting a exception stating that the object is not attached. So how do I get rid of all added but unsaved objects?

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• displaying images in a list box so the image resizes based on parent container

  - by MikeU

  I have an expander with a list box in it that displays image thumbnails. I want the images to be sized according to the size of the listbox and the list box to be sized based on the width of the expander. When I expand the expander I want the list box and the images to resize also. Does anyone know how I can accomplish this? <Expander Style="{DynamicResource ExpanderStyle}" Name="pictureExpander" IsExpanded="True" ExpandDirection="Left" Collapsed="pictureExpander_Collapsed" Expanded="pictureExpander_Expanded" Grid.Column="4"> <ListBox Name="photoList" ItemsSource="{Binding Source={StaticResource PhotoBin}}" IsSynchronizedWithCurrentItem="True" HorizontalAlignment="Stretch" ScrollViewer.CanContentScroll="False"> <ListBox.ItemContainerStyle> <Style TargetType="{x:Type ListBoxItem}"> <Style.Resources> <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="Yellow" /> </Style.Resources> <Style.Triggers> <Trigger Property="IsSelected" Value="True"> <Setter Property="BorderBrush" Value="Black"/> <Setter Property="BorderThickness" Value="5"/> </Trigger> </Style.Triggers> </Style> </ListBox.ItemContainerStyle> <ListBox.ItemTemplate> <DataTemplate> <Image Source="{Binding FileLocation}" Margin="0,5" HorizontalAlignment="Stretch" MouseLeftButtonDown="DragImage" /> </DataTemplate> </ListBox.ItemTemplate> </ListBox> </Expander>

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• OJB Reference Descriptor 1:0 relationship? Should I set auto-retrieve to false?

  - by godzillasdm

  Hi, I am having an issue while using Apache OJB with Spring 2 inside my web app. I'm using OJB reference-descriptor with 2 foreign key properties. I have an object A (parent) and object B (referenced object). The thing is, for an object A, there may or may not be an object B. In the case where there is no object B to go with Object A, the object B seems to be instantiated (through Spring?) anyways. However, I am unable to access object B's members. Whenever I test if Object B == null, it always returns false even though there is no matching value in the database. Since this Object is never null, I figured I can test the object's member like so: if( objectb.getDocumentNumber == null) { return false; } However, I get an exception in the jsp: javax.servlet.jsp.el.ELException: An error occurred while getting property "documentNumber" from an instance class org.sample.pojo.Objectb$$EnhancerByCGLIB$$78022a2 and this exception in the debugger when it's creating the objectB: com.sun.jdi.InvocationException occurred invoking method. I am guessing that the reference-descriptor must be a 1:1+ relationship, instead of a 1:0+ relationship. I was wondering if I should set the property 'auto-retrieve' to false, and then use the PersistenceBroker.retrieveAllReferences(Object obj); method as directed. However, this method's return value is 'void', so I am guessing that Spring somehow creates, and sets the reference class for me. (Returning me back to the same issue I'm having.) I will need a way to test whether the reference object exists first. If not, don't call this retrieveAllReferences method, but I don't see how. Am I going about this all wrong? Does reference-descriptor not allow 1:0 relations? Any work around to my problem? Your suggestions are greatly appreciated!

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• Hibernate "JOIN ... ON"?

  - by CaptainAwesomePants

  I have an application that uses Hibernate for its domain objects. One part of the app is common between a few apps, and it has no knowledge of the other systems. In order to handle relations, our class looks like this: @Entity public class SystemEvent { @Id @GeneratedValue public int entity_id; @Column(name="event_type") public String eventType; @Column(name="related_id") public int relatedObjectId; } relatedObjectId holds a foreign key to one of several different objects, depending on the type of event. When a system wants to know about events that are relevant to its interests, it grabs all the system events with eventType "NewAccounts" or some such thing, and it knows that all of those relatedObjectIds are IDs to a "User" object or similar. Unfortunately, this has caused a problem down the line. I can't figure out a way to tell Hibernate about this mapping, which means that HQL queries can't do joins. I'd really like to create an HQL query that looks like this: SELECT users FROM SystemEvent event join Users newUsers where event.eventType = 'SignUp' However, Hibernate has no knowledge of the relationship between SystemEvent and Users, and as far as I can tell, there's no way to tell it. So here's my question: Is there any way to tell Hibernate about a relationship when your domain objects reference each other via ID numbers and not class references?

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• Searching for flexible way to specify conenction string used by APS.NET membership

  - by bzamfir

  Hi, I develop an asp.net web application and I use ASP.NET membership provider. The application uses the membership schema and all required objects inside main application database However, during development I have to switch to various databases, for different development and testing scenarios. For this I have an external connection strings section file and also an external appsettings section, which allow me to not change main web.config but switch the db easily, by changing setting only in appsettings section. My files are as below: <connectionStrings configSource="connections.config"> </connectionStrings> <appSettings file="local.config"> .... ConnectionStrings looks as usual: <connectionStrings> <add name="MyDB1" connectionString="..." ... /> <add name="MyDB2" connectionString="..." ... /> .... </connectionStrings> And local.config as below <appSettings> <add key="ConnectionString" value="MyDB2" /> My code takes into account to use this connection string But membership settings in web.config contains the connection string name directly into the setting, like <add name="MembershipProvider" connectionStringName="MyDB2" ...> .... <add name="RoleProvider" connectionStringName="MyDB2" ...> Because of this, every time I have to edit them too to use the new db. Is there any way to config membership provider to use an appsetting to select db connection for membership db? Or to "redirect" it to read connection setting from somewhere else? Or at least to have this in some external file (like local.config) Maybe is some easy way to wrap asp.net membership provider intio my own provider which will just read connection string from where I want and pass it to original membership provider, and then just delegate the whole membership functionality to asp.net membership provider. Thanks.

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• NHibernate - joining on a subquery using ICriteria

  - by owensymes.mp

  I have a SQL query that I need to represent using NHibernate's ICriteria API. SELECT u.Id as Id, u.Login as Login, u.FirstName as FirstName, u.LastName as LastName, gm.UserGroupId_FK as UserGroupId, inner.Data1, inner.Data2, inner.Data3 FROM dbo.User u inner join dbo.GroupMember gm on u.Id = gm.UserAnchorId_FK left join ( SELECT di.UserAnchorId_FK, sum(di.Data1) as Data1, sum(di.Data2) as Data2, sum(di.Data3) as Data3 FROM dbo.DailyInfo di WHERE di.Date between '2009-04-01' and '2009-06-01' GROUP BY di.UserAnchorId_FK ) inner ON inner.UserAnchorId_FK = u.Id WHERE gm.UserGroupId_FK = 195 Attempts so far have included mapping 'User' and 'DailyInfo' classes (my entities) and making a DailyInfo object a property of the User object. However, how to map the foreign key relationship between them is still a mystery, ie <one-to-one></one-to-one> <one-to-many></one-to-many> <generator class="foreign"><param name="property">Id</param></generator> (!) Solutions on the web are generally to do with subqueries within a WHERE clause, however I need to left join on this subquery instead to ensure NULL values are returned for rows that do not join. I have the feeling that I should be using a Criteria for the outer query, then forming a 'join' with a DetachedCriteria to represent the subquery?

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• How to Determine The Module a Particular Exception Class is Defined In

  - by doug

  Note: i edited my Q (in the title) so that it better reflects what i actually want to know. In the original title and in the text of my Q, i referred to the source of the thrown exception; what i meant, and what i should have referred to, as pointed out in one of the high-strung but otherwise helpful response below, is the module that the exception class is defined in. This is evidenced by the fact that, again, as pointed out in one of the answers below the answer to the original Q is that the exceptions were thrown from calls to cursor.execute and cursor.next, respectively--which of course, isn't the information you need to write the try/except block. For instance (the Q has nothing specifically to do with SQLite or the PySQLite module): from pysqlite2 import dbapi2 as SQ try: cursor.execute('CREATE TABLE pname (id INTEGER PRIMARY KEY, name VARCHARS(50)') except SQ.OperationalError: print("{0}, {1}".format("table already exists", "... 'CREATE' ignored")) # cursor.execute('SELECT * FROM pname') while 1: try: print(cursor.next()) except StopIteration: break # i let both snippets error out to see the exception thrown, then coded the try/finally blocks--but that didn't tell me anything about which module the exception class is defined. In my example, there's only a single imported module, but where there are many more, i am interested to know how an experienced pythonista identifies the exception source (search-the-docs-till-i-happen-to-find-it is my current method). [And yes i am aware there's a nearly identical question on SO--but for C# rather than python, plus if you read the author's edited version, you'll see he's got a different problem in mind.]

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• Finding perfect numbers in C# (optimization)

  - by paradox

  I coded up a program in C# to find perfect numbers within a certain range as part of a programming challenge . However, I realized it is very slow when calculating perfect numbers upwards of 10000. Are there any methods of optimization that exist for finding perfect numbers? My code is as follows: using System; using System.Collections.Generic; using System.Linq; namespace ConsoleTest { class Program { public static List<int> FindDivisors(int inputNo) { List<int> Divisors = new List<int>(); for (int i = 1; i<inputNo; i++) { if (inputNo%i==0) Divisors.Add(i); } return Divisors; } public static void Main(string[] args) { const int limit = 100000; List<int> PerfectNumbers = new List<int>(); List<int> Divisors=new List<int>(); for (int i=1; i<limit; i++) { Divisors = FindDivisors(i); if (i==Divisors.Sum()) PerfectNumbers.Add(i); } Console.Write("Output ="); for (int i=0; i<PerfectNumbers.Count; i++) { Console.Write(" {0} ",PerfectNumbers[i]); } Console.Write("\n\n\nPress any key to continue . . . "); Console.ReadKey(true); } } }

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• What is the scope of StaticResource within a WPF ResourceDictionary?

  - by Nicolas Webb

  I have a WPF ResourceDictionary with the following TextBlock: <TextBlock Visibility="{Binding Converter={StaticResource MyBoolProp ResourceKey=BoolToVis}}"> </TextBlock> The ResourceDictionary is included in App.xaml under MergedDictionaries: <Application.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="MyResourceDictionary.xaml"/> Within the App.xaml I have defined the BoolToVis converter (again, under Application.Resources) <BooleanToVisibilityConverter x:Key="BoolToVis" /> When I start my app up - I get the following XamlParseException: "Provide value on 'System.Windows.Markup.StaticResourceHolder' threw an exception." The InnerException is: "Cannot find resource named 'BoolToVis'. Resource names are case sensitive." I'm able to refer to this converter directly with App.xaml (in fact, the particular XAML declaration is identical) and within other UserControls with no problems. This particular bit of code also worked fine under the .NET 4.0 RC (and Beta2). This error only started happening when I upgraded to the .NET 4.0 RTM. I'm able to work around it by declaring another BooleanToVisibilityConverter within MyResourceDictionary.xaml and referring to it like so: <TextBlock Visibility="{Binding Converter={StaticResource MyBoolProp ResourceKey=BoolToVis2}}"> </TextBlock> Any reason why I should need to do this?

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• Mapping a collection of enums with NHibernate

  - by beaufabry

  Mapping a collection of enums with NHibernate Specifically, using Attributes for the mappings. Currently I have this working mapping the collection as type Int32 and NH seems to take care of it, but it's not exactly ideal. The error I receive is "Unable to determine type" when trying to map the collection as of the type of the enum I am trying to map. I found a post that said to define a class as public class CEnumType : EnumStringType { public CEnumType() : base(MyEnum) { } } and then map the enum as CEnumType, but this gives "CEnumType is not mapped" or something similar. So has anyone got experience doing this? So anyway, just a simple reference code snippet to give an example with [NHibernate.Mapping.Attributes.Class(Table = "OurClass")] public class CClass : CBaseObject { public enum EAction { do_action, do_other_action }; private IList<EAction> m_class_actions = new List<EAction>(); [NHibernate.Mapping.Attributes.Bag(0, Table = "ClassActions", Cascade="all", Fetch = CollectionFetchMode.Select, Lazy = false)] [NHibernate.Mapping.Attributes.Key(1, Column = "Class_ID")] [NHibernate.Mapping.Attributes.Element(2, Column = "EAction", Type = "Int32")] public virtual IList<EAction> Actions { get { return m_class_actions; } set { m_class_actions = value;} } } So, anyone got the correct attributes for me to map this collection of enums as actual enums? It would be really nice if they were stored in the db as strings instead of ints too but it's not completely necessary.

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• Manipulating columns of numbers in elisp

  - by ~unutbu

  I have text files with tables like this: Investment advisory and related fees receivable (161,570 ) (71,739 ) (73,135 ) Net purchases of trading investments (93,261 ) (30,701 ) (11,018 ) Other receivables 61,216 (10,352 ) (69,313 ) Restricted cash 20,658 (20,658 ) - Other current assets (39,643 ) 14,752 64 Other non-current assets 71,896 (26,639 ) (26,330 ) Since these are accounting numbers, parenthesized numbers indicate negative numbers. Dashes represent 0 or no number. I'd like to be able to mark a rectangular region such as third column above, call a function (format-column), and automatically have (-73135-11018-69313+64-26330)/1000 sitting in my kill-ring. Even better would be -73.135-11.018-69.313+0.064-26.330 but I couldn't figure out a way to transform 64 -- 0.064. This is what I've come up with: (defun format-column () "format accounting numbers in a rectangular column. format-column puts the result in the kill-ring" (interactive) (let ((p (point)) (m (mark)) ) (copy-rectangle-to-register 0 (min m p) (max m p) nil) (with-temp-buffer (insert-register 0) (goto-char (point-min)) (while (search-forward "-" nil t) (replace-match "" nil t)) (goto-char (point-min)) (while (search-forward "," nil t) (replace-match "" nil t)) (goto-char (point-min)) (while (search-forward ")" nil t) (replace-match "" nil t)) (goto-char (point-min)) (while (search-forward "(" nil t) (replace-match "-" nil t) (just-one-space) (delete-backward-char 1) ) (goto-char (point-min)) (while (search-forward "\n" nil t) (replace-match " " nil t)) (goto-char (point-min)) (kill-new (mapconcat 'identity (split-string (buffer-substring (point-min) (point-max))) "+")) (kill-region (point-min) (point-max)) (insert "(") (yank 2) (goto-char (point-min)) (while (search-forward "+-" nil t) (replace-match "-" nil t)) (goto-char (point-max)) (insert ")/1000") (kill-region (point-min) (point-max)) ) ) ) (global-set-key "\C-c\C-f" 'format-column) Although it seems to work, I'm sure this function is poorly coded. The repetitive calls to goto-char, search-forward, and replace-match and the switching from buffer to string and back to buffer seems ugly and inelegant. My entire approach may be wrong-headed, but I don't know enough elisp to make this more beautiful. Do you see a better way to write format-column, and/or could you make suggestions on how to improve this code?

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• Double type returns -1.#IND/NaN error when calculating pi iteratively

  - by Draak

  I am working through a problem for my MCTS certification. The program has to calculate pi until the user presses a key, at which point the thread is aborted, the result returned to the main thread and printed in the console. Simple enough, right? This exercise is really meant to be about threading, but I'm running into another problem. The procedure that calculates pi returns -1.#IND. I've read some of the material on the web about this error, but I'm still not sure how to fix it. When I change double to Decimal type, I unsurprisingly get Overflow Exception very quickly. So, the question is how do I store the numbers correctly? Do I have to create a class to somehow store parts of the number when it gets too big to be contained in a Decimal? Class PiCalculator Dim a As Double = 1 Dim b As Double = 1 / Math.Sqrt(2) Dim t As Double = 1 / 4 Dim p As Double = 1 Dim pi As Double Dim callback As DelegateResult Sub New(ByVal _callback As DelegateResult) callback = _callback End Sub Sub Calculate() Try Do While True Dim a1 = (a + b) / 2 Dim b1 = Math.Sqrt(a * b) Dim t1 = t - p * (a - a1) ^ 2 Dim p1 = 2 * p a = a1 b = b1 t = t1 p = p1 pi = ((a + b) ^ 2) / (4 * t) Loop Catch ex As ThreadAbortException Finally callback(pi) End Try End Sub End Class

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• WPF designer gives exception when databinding a label to a checkbox

  - by John

  I'm sure it's something stupid, but I'm playing around with databinding. I have a checkbox and a label on a form. What I'm trying to do is simply bind the Content of the label to the checkbox's IsChecked value. What I've done runs fine (no compilation errors and acts as expected), but if I touch the label in the XAML, the designer trows an exception: System.NullReferenceException Object reference not set to an instance of an object. at MS.Internal.Designer.PropertyEditing.Editors.MarkupExtensionInlineEditorControl.BuildBindingString(Boolean modeSupported, PropertyEntry propertyEntry) at <Window x:Class="UnitTestHelper.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:FileSysCtls="clr-namespace:WPFFileSystemUserControls;assembly=WPFFileSystemUserControls" xmlns:HelperClasses="clr-namespace:UnitTestHelper" Title="MainWindow" Height="406" Width="531"> <Window.Resources> <HelperClasses:ThreestateToBinary x:Key="CheckConverter" /> </Window.Resources> <Grid Height="367" Width="509"> <CheckBox Content="Step into subfolders" Height="16" HorizontalAlignment="Left" Margin="17,254,0,0" Name="chkSubfolders" VerticalAlignment="Top" Width="130" IsThreeState="False" /> <Label Height="28" HorizontalAlignment="Left" Margin="376,254,0,0" Name="lblStepResult" VerticalAlignment="Top" Width="120" IsEnabled="True" Content="{Binding IsChecked, ElementName=chkSubfolders, Mode=OneWay, UpdateSourceTrigger=PropertyChanged, Converter={StaticResource CheckConverter}}" /> </Grid> The ThreeStateToBinary class is as follows: class ThreestateToBinary : IValueConverter { #region IValueConverter Members public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { if ((bool)value) return "Checked"; else return "Not checked"; //throw new NotImplementedException(); } public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { return ((string)value == "Checked"); //throw new NotImplementedException(); } #endregion } Quite honestly, I'm playing around with it at this point. It was originally simpler (not using the ValueConverter) but was displaying similar behavior when I simply had the content set to: Content="{Binding IsChecked, ElementName=chkSubfolders, UpdateSourceTrigger=PropertyChanged}" Any ideas? Thanks, John

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• NSXMLParser: how do I wait until loading has finished?

  - by Archagon

  Let's say I'm using NSXMLParser to load a level (stored as an XML document, obviously) into my iPhone game. NSXMLParser works by assigning a delegate and sending it messages at key moments. How do I ensure that my entire level is loaded before doing anything else? I know I can make my main class the delegate and implement parserDidEndDocument, but this feels very hacky. My main class shouldn't have to know anything about the way the parsing is done! On the other hand, if I make a separate class/delegate for parsing my level, my main class has no way of knowing when the parsing is finished, unless it queries the parsing class continuously or the parsing class sends it a message. Either way, the main class would be tied to the implementation of the parsing class. Can I hide all this event-driven business from the main class and simply make the parser return the level object when it's done? (i.e., newLevel = [[GameLevel alloc] initFromXML:xmlfile], which would in turn use NSXMLParser to load the level and then somehow return when finished.) At the moment, I'm using an external DOM parser, but I'm curious how this would be done with NSXMLParser. Sorry if this is a stupid question -- I'm a bit new to this!

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• T SQL Rotate row into columns

  - by cshah

  SQL 2005 using T-SQL, I want to rotate rows into columns. Sample script: Use TempDB Go CREATE TABLE [dbo].[CPPrinter_InkLevels]( [CPPrinter_InkLevels_ID] [int] IDENTITY(1,1) NOT NULL, [CPMeasurementGUID] [uniqueidentifier] NOT NULL, [InkName] [varchar](30) NOT NULL, [InkLevel] [decimal](6, 2) NOT NULL, CONSTRAINT [PK_CPPrinter_InkLevels] PRIMARY KEY CLUSTERED ( [CPPrinter_InkLevels_ID] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] GO SET IDENTITY_INSERT [dbo].[CPPrinter_InkLevels] ON INSERT [dbo].[CPPrinter_InkLevels] ([CPPrinter_InkLevels_ID], [CPMeasurementGUID], [InkName], [InkLevel]) VALUES (1, N'6acc1562-4e02-45ff-b480-9e01fb97fccf', N'Black', CAST(0.60 AS Decimal(6, 2))) INSERT [dbo].[CPPrinter_InkLevels] ([CPPrinter_InkLevels_ID], [CPMeasurementGUID], [InkName], [InkLevel]) VALUES (2, N'6acc1562-4e02-45ff-b480-9e01fb97fccf', N'Cyan', CAST(0.69 AS Decimal(6, 2))) INSERT [dbo].[CPPrinter_InkLevels] ([CPPrinter_InkLevels_ID], [CPMeasurementGUID], [InkName], [InkLevel]) VALUES (3, N'6acc1562-4e02-45ff-b480-9e01fb97fccf', N'Magenta', CAST(0.55 AS Decimal(6, 2))) INSERT [dbo].[CPPrinter_InkLevels] ([CPPrinter_InkLevels_ID], [CPMeasurementGUID], [InkName], [InkLevel]) VALUES (4, N'6acc1562-4e02-45ff-b480-9e01fb97fccf', N'Yellow', CAST(0.51 AS Decimal(6, 2))) INSERT [dbo].[CPPrinter_InkLevels] ([CPPrinter_InkLevels_ID], [CPMeasurementGUID], [InkName], [InkLevel]) VALUES (5, N'6acc1562-4e02-45ff-b480-9e01fb97fccf', N'Light Black', CAST(0.64 AS Decimal(6, 2))) INSERT [dbo].[CPPrinter_InkLevels] ([CPPrinter_InkLevels_ID], [CPMeasurementGUID], [InkName], [InkLevel]) VALUES (6, N'6acc1562-4e02-45ff-b480-9e01fb97fccf', N'Light Cyan', CAST(0.43 AS Decimal(6, 2))) INSERT [dbo].[CPPrinter_InkLevels] ([CPPrinter_InkLevels_ID], [CPMeasurementGUID], [InkName], [InkLevel]) VALUES (7, N'6acc1562-4e02-45ff-b480-9e01fb97fccf', N'Light Magenta', CAST(0.30 AS Decimal(6, 2))) INSERT [dbo].[CPPrinter_InkLevels] ([CPPrinter_InkLevels_ID], [CPMeasurementGUID], [InkName], [InkLevel]) VALUES (8, N'6acc1562-4e02-45ff-b480-9e01fb97fccf', N'Waste Tank', CAST(0.18 AS Decimal(6, 2))) INSERT [dbo].[CPPrinter_InkLevels] ([CPPrinter_InkLevels_ID], [CPMeasurementGUID], [InkName], [InkLevel]) VALUES (9, N'932348a7-6e2f-4a10-9760-be1ae640c7d7', N'Black', CAST(0.60 AS Decimal(6, 2))) INSERT [dbo].[CPPrinter_InkLevels] ([CPPrinter_InkLevels_ID], [CPMeasurementGUID], [InkName], [InkLevel]) VALUES (10, N'932348a7-6e2f-4a10-9760-be1ae640c7d7', N'Cyan', CAST(0.69 AS Decimal(6, 2))) INSERT [dbo].[CPPrinter_InkLevels] ([CPPrinter_InkLevels_ID], [CPMeasurementGUID], [InkName], [InkLevel]) VALUES (11, N'932348a7-6e2f-4a10-9760-be1ae640c7d7', N'Magenta', CAST(0.55 AS Decimal(6, 2))) INSERT [dbo].[CPPrinter_InkLevels] ([CPPrinter_InkLevels_ID], [CPMeasurementGUID], [InkName], [InkLevel]) VALUES (12, N'932348a7-6e2f-4a10-9760-be1ae640c7d7', N'Yellow', CAST(0.51 AS Decimal(6, 2))) INSERT [dbo].[CPPrinter_InkLevels] ([CPPrinter_InkLevels_ID], [CPMeasurementGUID], [InkName], [InkLevel]) VALUES (13, N'932348a7-6e2f-4a10-9760-be1ae640c7d7', N'Light Black', CAST(0.64 AS Decimal(6, 2))) INSERT [dbo].[CPPrinter_InkLevels] ([CPPrinter_InkLevels_ID], [CPMeasurementGUID], [InkName], [InkLevel]) VALUES (14, N'932348a7-6e2f-4a10-9760-be1ae640c7d7', N'Light Cyan', CAST(0.43 AS Decimal(6, 2))) Go SELECT * FROM [dbo].[CPPrinter_InkLevels] --Desired output CPMeasuremnetGUID, Ink1, Level1, Ink2, Level2, Ink3, Level3....

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• Help with an AJAX request

  - by sea_1987

  The Problem I am tring to do an ajax request to a PHP script, however I am having a problem getting the data into the format that the PHP is expecting it, the PHP is expecting the data to come in as array within an array something like, Array ( [cv_file] => Array ( [849649717] => Y [849649810] => Y ) [save] => Save CVs ) What have I tried? I have tried in my javascript to create an empty array and use that as the array key, something like this, var cv_file = new Array(); $(".drag_check").draggable({helper:"clone", opacity:"0.5"}); $(".searchPage").droppable({ accept:".drag_check", hoverClass: "dropHover", drop: function(ev, ui) { var droppedItem = ui.draggable.children(); cv_file = ui.draggable.children().attr('name'); var link = ui.draggable.children().attr('name').substr(ui.draggable.children().attr('name').indexOf("[")+1, ui.draggable.children().attr('name').lastIndexOf("]")-8) $.ajax({ type:"POST", url:"/search", data:cv_file+"&save=Save CVs", success:function(){ alert(cv_file) $('.shortList').append('<li><input type="checkbox" value="Y" class="checkbox" name="remove_cv['+link+']"/><a href="/cv/'+link+'">'+link+'</a></li>'); }, error:function() { alert("Somthing has gone wrong"); } }); } }); My Question How can I get the data into the format that the PHP is expecting, I would appreciate any help that anyone can give? Edit On alerting what the poster in the comments suggested I get he following, cv_file[849649717]&save=Save CVs Thank you

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• PHP SoapClient() function returning a single XML string

  - by gjb

  I am having difficulty with the PHP SoapClient() function. The SOAP request is successful, but the response is returned as an object containing a single XML string with the key "any". For example: <?php $params = array('strUsername' => 'Test', 'strPassword' => 'Test'); $client=new SoapClient('http://www.example.com/webservice.asmx?wsdl', array('features' => SOAP_SINGLE_ELEMENT_ARRAYS)); $result = $client->strExampleCall($params); print_r($result); ?> This outputs the following: stdClass Object ( [strExampleCallResult] => stdClass Object ( [any] => <Response xmlns="" release="1.0.0" environment="Production" lang="en-GB"><ApplicationArea><Sender><SenderId>0</SenderId><ReferenceId>0</ReferenceId></Sender><Destination><DestinationId>1</DestinationId></Destination></ApplicationArea><DataArea><Result>1</Result></DataArea></Response> ) ) Subsequently, I cannot access properties of the object as I'd expect to: echo $result->strExampleCallResult->Response->DataArea->Result; Why isn't PHP parsing the SOAP response into properties of the returned object? I am using PHP 5.3.0 and believe the SOAP server is running .NET. Any suggestions will be much appreciated.

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• Possible to create an implicit cast for an anonymous type to a dictionary?

  - by Ralph

  I wrote a method like this: using AttrDict = System.Collections.Generic.Dictionary<string, object>; using IAttrDict = System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<string, object>>; static string HtmlTag(string tagName, string content = null, IAttrDict attrs = null) { var sb = new StringBuilder("<"); sb.Append(tagName); if(attrs != null) foreach (var attr in attrs) sb.AppendFormat(" {0}=\"{1}\"", attr.Key, attr.Value.ToString().EscapeQuotes()); if (content != null) sb.AppendFormat(">{0}</{1}>", content, tagName); else sb.Append(" />"); return sb.ToString(); } Which you can call like HtmlTag("div", "hello world", new AttrDict{{"class","green"}}); Not too bad. But what if I wanted to allow users to pass an anonymous type in place of the dict? Like HtmlTag("div", "hello world", new {@class="green"}); Even better! I could write the overload easily, but the problem is I'm going to have about 50 functions like this, I don't want to overload each one of them. I was hoping I could just write an implicit cast to do the work for me... public class AttrDict : Dictionary<string, object> { public static implicit operator AttrDict(object obj) { // conversion from anonymous type to AttrDict here } } But C# simply won't allow it: user-defined conversions to or from a base class are not allowed So what can I do?

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• Best way to convert wpf triggers to silverlight?

  - by Stewart Armbrecht

  I have developed several custom controls in a wpf application that use triggers. what is the fastest way to convert the code so that I have a single code base that works both in the wpf application and the silverlight applicaiton. Here is a sample of the code: <Style x:Key="sButtonAction" TargetType="Button"> <!--<Setter Property="BitmapEffect" Value="{StaticResource BannerEffect}" />--> <Setter Property="Height" Value="25" /> <Setter Property="Margin" Value="4" /> <Setter Property="Cursor" Value="Hand" /> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="Button"> <Border x:Name="PART_Border" CornerRadius="10" BorderThickness="{StaticResource sBorderThicknessStandard}" BorderBrush="{StaticResource bColorBorder}" Background="{StaticResource ButtonActionBackground}"> <TextBlock x:Name="PART_TextBlock" Margin="5,2,5,2" HorizontalAlignment="Center" VerticalAlignment="Center" Foreground="White"> <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" /></TextBlock> </Border> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value="True"> <Setter TargetName="PART_TextBlock" Property="Foreground" Value="#990000"></Setter> </Trigger> <Trigger Property="IsPressed" Value="True"> <Setter TargetName="PART_Border" Property="Background" Value="{StaticResource ButtonActionBackgroundSelected}"></Setter> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style>

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• Visual Studio 2008 Generation of Designer File Failed (Cannot use a leading .. to exit above the top

  - by tardomatic

  Hi, It seems the universe is against me this week. I have been happily coding away on my ASP.Net application for weeks now without issues. Today I tried to add a textbox to a form, and on saving the form, I received the following error: Generation of designer file failed: Cannot use a leading .. to exit above the top directory I googled, but with no luck. I did find a blog post that shows how to add a key into the registry so that Visual Studio logs more detail about these errors, and the following is what shows up in the generated log file: ------------------------------------------------------------- C:\[path to aspx file]\PageName.aspx Generation of designer file failed: Cannot use a leading .. to exit above the top directory. ------------------------------------------------------------- System.Web.HttpException: Cannot use a leading .. to exit above the top directory. at System.Web.Util.UrlPath.ReduceVirtualPath(String path) at System.Web.Util.UrlPath.Reduce(String path) at System.Web.Util.UrlPath.Combine(String appPath, String basepath, String relative) at System.Web.VirtualPath.Combine(VirtualPath relativePath) at System.Web.VirtualPath.Combine(VirtualPath v1, VirtualPath v2) at System.Web.VirtualPathUtility.Combine(String basePath, String relativePath) at Microsoft.VisualStudio.Web.Application.Parser.BeginParse(String virtualPath, String text) at Microsoft.VisualStudio.Web.Application.Generator.UpdateDesignerClass(String document, String codeBehind, String codeBehindFile, String[] publicFields, UDC_Flags flags) ------------------------------------------------------------- And, of course this means that there is no way I can reference the newly added text box from the code behind. I thought it might be just this page giving the issue, but I have tried three other pages with the same result. I haven't changed the environment for weeks, so I am not sure how this happens. Any ideas out there? Thanks in advance Hamish

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• Advantage Database Server: slow stored procedure performance.

  - by ie

  I have a question about a performance of stored procedures in the ADS. I created a simple database with the following structure: CREATE TABLE MainTable ( Id INTEGER PRIMARY KEY, Name VARCHAR(50), Value INTEGER ); CREATE UNIQUE INDEX MainTableName_UIX ON MainTable ( Name ); CREATE TABLE SubTable ( Id INTEGER PRIMARY KEY, MainId INTEGER, Name VARCHAR(50), Value INTEGER ); CREATE INDEX SubTableMainId_UIX ON SubTable ( MainId ); CREATE UNIQUE INDEX SubTableName_UIX ON SubTable ( Name ); CREATE PROCEDURE CreateItems ( MainName VARCHAR ( 20 ), SubName VARCHAR ( 20 ), MainValue INTEGER, SubValue INTEGER, MainId INTEGER OUTPUT, SubId INTEGER OUTPUT ) BEGIN DECLARE @MainName VARCHAR ( 20 ); DECLARE @SubName VARCHAR ( 20 ); DECLARE @MainValue INTEGER; DECLARE @SubValue INTEGER; DECLARE @MainId INTEGER; DECLARE @SubId INTEGER; @MainName = (SELECT MainName FROM __input); @SubName = (SELECT SubName FROM __input); @MainValue = (SELECT MainValue FROM __input); @SubValue = (SELECT SubValue FROM __input); @MainId = (SELECT MAX(Id)+1 FROM MainTable); @SubId = (SELECT MAX(Id)+1 FROM SubTable ); INSERT INTO MainTable (Id, Name, Value) VALUES (@MainId, @MainName, @MainValue); INSERT INTO SubTable (Id, Name, MainId, Value) VALUES (@SubId, @SubName, @MainId, @SubValue); INSERT INTO __output SELECT @MainId, @SubId FROM system.iota; END; CREATE PROCEDURE UpdateItems ( MainName VARCHAR ( 20 ), MainValue INTEGER, SubValue INTEGER ) BEGIN DECLARE @MainName VARCHAR ( 20 ); DECLARE @MainValue INTEGER; DECLARE @SubValue INTEGER; DECLARE @MainId INTEGER; @MainName = (SELECT MainName FROM __input); @MainValue = (SELECT MainValue FROM __input); @SubValue = (SELECT SubValue FROM __input); @MainId = (SELECT TOP 1 Id FROM MainTable WHERE Name = @MainName); UPDATE MainTable SET Value = @MainValue WHERE Id = @MainId; UPDATE SubTable SET Value = @SubValue WHERE MainId = @MainId; END; CREATE PROCEDURE SelectItems ( MainName VARCHAR ( 20 ), CalculatedValue INTEGER OUTPUT ) BEGIN DECLARE @MainName VARCHAR ( 20 ); @MainName = (SELECT MainName FROM __input); INSERT INTO __output SELECT m.Value * s.Value FROM MainTable m INNER JOIN SubTable s ON m.Id = s.MainId WHERE m.Name = @MainName; END; CREATE PROCEDURE DeleteItems ( MainName VARCHAR ( 20 ) ) BEGIN DECLARE @MainName VARCHAR ( 20 ); DECLARE @MainId INTEGER; @MainName = (SELECT MainName FROM __input); @MainId = (SELECT TOP 1 Id FROM MainTable WHERE Name = @MainName); DELETE FROM SubTable WHERE MainId = @MainId; DELETE FROM MainTable WHERE Id = @MainId; END; Actually, the problem I had - even so light stored procedures work very-very slow (about 50-150 ms) relatively to plain queries (0-5ms). To test the performance, I created a simple test (in F# using ADS ADO.NET provider): open System; open System.Data; open System.Diagnostics; open Advantage.Data.Provider; let mainName = "main name #"; let subName = "sub name #"; // INSERT let cmdTextScriptInsert = " DECLARE @MainId INTEGER; DECLARE @SubId INTEGER; @MainId = (SELECT MAX(Id)+1 FROM MainTable); @SubId = (SELECT MAX(Id)+1 FROM SubTable ); INSERT INTO MainTable (Id, Name, Value) VALUES (@MainId, :MainName, :MainValue); INSERT INTO SubTable (Id, Name, MainId, Value) VALUES (@SubId, :SubName, @MainId, :SubValue); SELECT @MainId, @SubId FROM system.iota;"; let cmdTextProcedureInsert = "CreateItems"; // UPDATE let cmdTextScriptUpdate = " DECLARE @MainId INTEGER; @MainId = (SELECT TOP 1 Id FROM MainTable WHERE Name = :MainName); UPDATE MainTable SET Value = :MainValue WHERE Id = @MainId; UPDATE SubTable SET Value = :SubValue WHERE MainId = @MainId;"; let cmdTextProcedureUpdate = "UpdateItems"; // SELECT let cmdTextScriptSelect = " SELECT m.Value * s.Value FROM MainTable m INNER JOIN SubTable s ON m.Id = s.MainId WHERE m.Name = :MainName;"; let cmdTextProcedureSelect = "SelectItems"; // DELETE let cmdTextScriptDelete = " DECLARE @MainId INTEGER; @MainId = (SELECT TOP 1 Id FROM MainTable WHERE Name = :MainName); DELETE FROM SubTable WHERE MainId = @MainId; DELETE FROM MainTable WHERE Id = @MainId;"; let cmdTextProcedureDelete = "DeleteItems"; let cnnStr = @"data source=D:\DB\test.add; ServerType=local; user id=adssys; password=***;"; let cnn = new AdsConnection(cnnStr); try cnn.Open(); let cmd = cnn.CreateCommand(); let parametrize ix prms = cmd.Parameters.Clear(); let addParam = function | "MainName" -> cmd.Parameters.Add(":MainName" , mainName + ix.ToString()) |> ignore; | "SubName" -> cmd.Parameters.Add(":SubName" , subName + ix.ToString() ) |> ignore; | "MainValue" -> cmd.Parameters.Add(":MainValue", ix * 3 ) |> ignore; | "SubValue" -> cmd.Parameters.Add(":SubValue" , ix * 7 ) |> ignore; | _ -> () prms |> List.iter addParam; let runTest testData = let (cmdType, cmdName, cmdText, cmdParams) = testData; let toPrefix cmdType cmdName = let prefix = match cmdType with | CommandType.StoredProcedure -> "Procedure-" | CommandType.Text -> "Script -" | _ -> "Unknown -" in prefix + cmdName; let stopWatch = new Stopwatch(); let runStep ix prms = parametrize ix prms; stopWatch.Start(); cmd.ExecuteNonQuery() |> ignore; stopWatch.Stop(); cmd.CommandText <- cmdText; cmd.CommandType <- cmdType; let startId = 1500; let count = 10; for id in startId .. startId+count do runStep id cmdParams; let elapsed = stopWatch.Elapsed; Console.WriteLine("Test '{0}' - total: {1}; per call: {2}ms", toPrefix cmdType cmdName, elapsed, Convert.ToInt32(elapsed.TotalMilliseconds)/count); let lst = [ (CommandType.Text, "Insert", cmdTextScriptInsert, ["MainName"; "SubName"; "MainValue"; "SubValue"]); (CommandType.Text, "Update", cmdTextScriptUpdate, ["MainName"; "MainValue"; "SubValue"]); (CommandType.Text, "Select", cmdTextScriptSelect, ["MainName"]); (CommandType.Text, "Delete", cmdTextScriptDelete, ["MainName"]) (CommandType.StoredProcedure, "Insert", cmdTextProcedureInsert, ["MainName"; "SubName"; "MainValue"; "SubValue"]); (CommandType.StoredProcedure, "Update", cmdTextProcedureUpdate, ["MainName"; "MainValue"; "SubValue"]); (CommandType.StoredProcedure, "Select", cmdTextProcedureSelect, ["MainName"]); (CommandType.StoredProcedure, "Delete", cmdTextProcedureDelete, ["MainName"])]; lst |> List.iter runTest; finally cnn.Close(); And I'm getting the following results: Test 'Script -Insert' - total: 00:00:00.0292841; per call: 2ms Test 'Script -Update' - total: 00:00:00.0056296; per call: 0ms Test 'Script -Select' - total: 00:00:00.0051738; per call: 0ms Test 'Script -Delete' - total: 00:00:00.0059258; per call: 0ms Test 'Procedure-Insert' - total: 00:00:01.2567146; per call: 125ms Test 'Procedure-Update' - total: 00:00:00.7442440; per call: 74ms Test 'Procedure-Select' - total: 00:00:00.5120446; per call: 51ms Test 'Procedure-Delete' - total: 00:00:01.0619165; per call: 106ms The situation with the remote server is much better, but still a great gap between plaqin queries and stored procedures: Test 'Script -Insert' - total: 00:00:00.0709299; per call: 7ms Test 'Script -Update' - total: 00:00:00.0161777; per call: 1ms Test 'Script -Select' - total: 00:00:00.0258113; per call: 2ms Test 'Script -Delete' - total: 00:00:00.0166242; per call: 1ms Test 'Procedure-Insert' - total: 00:00:00.5116138; per call: 51ms Test 'Procedure-Update' - total: 00:00:00.3802251; per call: 38ms Test 'Procedure-Select' - total: 00:00:00.1241245; per call: 12ms Test 'Procedure-Delete' - total: 00:00:00.4336334; per call: 43ms Is it any chance to improve the SP performance? Please advice. ADO.NET driver version - 9.10.2.9 Server version - 9.10.0.9 (ANSI - GERMAN, OEM - GERMAN) Thanks!

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• How to either return JSON or RedirectToAction?

  - by DaveDev

  I have an Action Method that I'd either like to return JSON from on one condition or redirect on another condition. I thought that I could do this by returning ActionResult from my method but doing this causes the error "not all code paths return a value" Can anyone tell me what I'm doing wrong? Or how to achieve the desired result? Here's the code below: [AcceptVerbs(HttpVerbs.Post)] public ActionResult Login(User user) { var myErrors = new Dictionary<string, string>(); try { if (ModelState.IsValid) { if (userRepository.ValidUser(user)) { RedirectToAction("Index", "Group"); //return Json("Valid"); } else { return Json("Invalid"); } } else { foreach (KeyValuePair<string, ModelState> keyValuePair in ViewData.ModelState) { if (keyValuePair.Value.Errors.Count > 0) { List<string> errors = new List<string>(); myErrors.Add(keyValuePair.Key, keyValuePair.Value.Errors[0].ErrorMessage); } } return Json(myErrors); } } catch (Exception) { return Json("Invalid"); } }

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