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  • Fluent many-to-many: Deleting one end does not remove the entry in the relation table

    - by Kristoffer
    I have two classes (Parent, Child) that have a many-to-many relationship that only one end (Parent) knows about. My problem is that when I delete a "relation unaware" object (Child), the record in the many-to-many table is left. I want the relationship to be removed regardless of which end of it is deleted. How can I do that with Fluent NHibernate mappings, without adding a Parent property on Child? The classes: public class Parent { public Guid Id { get; set; } public IList<Child> Children { get; set; } } public class Child { public Guid Id { get; set; } // Don't want the property below: // public Parent Parent { get; set; } }

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  • javascript inherance? with Private vars and methods too

    - by Totty
    Hy i need to inherent a class from another. Parent has private var "_data" and private method "_test" and public method "add" Now the child have a public method "add", that uses the private method from the parent "_test" and the private var "_data". How do i do this? var Parent = function(){ var _data = {}; var _test = function(){alert('test')}; this.add = function(){alert('add from parent')} } var Child = function(){ this.add = function(){// here uses the _data and _test from the Parent class alert('add from child') } } // something to inherent Child from Parent // instance Child and use the add method And i think im miss the prototype concept (http://stackoverflow.com/questions/892467/javascript-inheritance)

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  • hibernate versioning parent entity

    - by Priit
    Consider two entities Parent and Child. Child is part of Parent's transient collection Child has a ManyToOne mapping to parent with FetchType.LAZY Both are displayed on the same form to a user. When user saves the data we first update Parent instance and then Child collection (both using merge). Now comes the tricky part. When user modifies only Child property on the form then hibernate dirty checking does not update Parent instance and thus does not increase optimistic locking version number for that entity. I would like to see situation where only Parent is versioned and every time I call merge for Parent then version is always updated even if actual update is not executed in db.

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  • Getting a JFrame's actual current location

    - by Ian Fellows
    Hello community, I am trying to create a (child) JFrame which slides out from underneath one side of a second (parent) JFrame. The goal is to then have the child follow the parent around when it is moved, and respond to resizing events. This is somewhat related to this question. I have tried using a ComponentListener, but with this method the child only moves once the parent has come to a stop, whereas I would like the child to move as the parent is dragged around the screen. Another option I attempted was to start a new refresher thread that continually updated the child's location using getLocation() or getLocationOnScreen(), but the lag was the same as with ComponentListener. Is there a way to get the true actual location of a JFrame even in the midst of a drag? or if not, is there a way to get the effect of a sheet sliding out from underneath and following the Frame around?

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  • How to get image from relative URL in C#, the image cannot be in the project

    - by red-X
    I have a project where I'm loading relative image Uri's from an xml file. I'm loading the image like this: if (child.Name == "photo" && child.Attributes["href"] != null && File.Exists(child.Attributes["href"].Value)) { Image image = new Image(); image.Source = new BitmapImage(new Uri(child.Attributes["href"].Value, UriKind.RelativeOrAbsolute)); images.Add(image); } Where the "child" object is an XmlNode which could looks like this <photo name="info" href="Resources\Content\test.png"/> During debug it seemd images is filled with actual images but when I want to see them in any way it shows nothing. Weird thing is when I include the images in my project it does work, I however dont want to do that since my point for using an xml file is so that it would be lost since you'd have to rebuild the program anyway after a change.

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  • Default values for Content Taxonomy fields in Drupal

    - by lazysoundsystem
    I'm trying to set the default value for a Content Taxonomy field in a hook_form_alter, but can't pin down the necessary format. I've tried this and many variations: foreach (element_children($form) as $child) { // Set $default_value. if ($form[$child]['tids']) { // This, for Content Taxonomy fields, isn't working: $form[$child]['tids']['#default_value'] = array('value' => $default_value); dsm($form[$child]['tids']['#default_value']); } else { // This, for other fields, is working: $form[$child][0]['#default_value']['value'] = $default_value; } } Can anyone tell me what I'm missing?

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  • AutoMapper: How to transform object graph to into?

    - by epitka
    If I have a one-to-many relationship and I want to transorm this into a list of flat Dto-s where some attributes of parent and some of child appear in a dto, is this something that is supported out-of-box with AutoMapper? For example if I have something like this Parent 1. ParentId 2. ParentAttr1 3. List<Child> Child 1. ChildId 2. ChildAttr1 2. ChildAttr2 Dto 1. ParentId 2. ChildId 2. ChildAttr1 3. ChildAttr2 How do I project Parent into a Dto where for each child in parent I will get an instace of Dto? I've setup two maps Parent-Dto and Child-Dto but just doing _mapper.Map(parentInstance) only projects parents attributes. Does this have to be done in two steps, where I would iterate children myself?

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  • scala xml rewrite rule (or, simple pattern help)

    - by williamstw
    I'm missing some fairly simple syntax I gather. I'm trying to rewrite an element label to something else and keep everything else intact. object htmlRule extends RewriteRule { override def transform(n: Node): Seq[Node] = n match { case Elem(prefix, "document", attribs, scope, child@_*) => Elem(prefix, "html", attribs, scope, child) case other => other } } Now, I ask for an explanation of two things: 1) What exactly does "child@_*" mean in plain English? 2) How can I capture the value of "child@_*" and just let it pass right through to the new element? Currently, I get the following error, which makes sense. [error] found : Seq[scala.xml.Node] [error] required: scala.xml.Node [error] Elem(prefix, "html", attribs, scope, child) I'm not wedded to this either, so if there's a better way to simply change the element name of a specific node, let's here it... Thanks, --tim

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  • Validates presence of each other in two associated models

    - by Sergey Alekseev
    I have the following two models: class Parent < ActiveRecord::Base has_one :child, dependent: :destroy validates :child, presence: true end class Child < ActiveRecord::Base belongs_to :parent validates :parent, presence: true end I want to create Parent object. If I do the following: Parent.create! or Factory(:parent) Exception raises: ActiveRecord::RecordInvalid: Validation failed: Child can't be blank But I can't create Child object without Parent object for the same reason - I need to create Parent object first in order to pass presence validation. As it appears I have some kind of infinite recursion here. How to solve it?

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  • LIMIT amount of rows fetched by JOIN

    - by user892134
    How do i LIMIT the child rows fetched to only 5? Here is the SQLfiddle http://sqlfiddle.com/#!2/bd96a/2. Right now it fetches all rows with parentid='4' and parentid='14'. It should only fetch 5 of each parentid. Assuming i have hundreds of rows, it should only fetch a max of 5 for each parentid. "SELECT child.* FROM mytable as parent LEFT JOIN mytable as child on child.parentid=parent.id WHERE parent.pageid IN ( 1, 2) AND parent.submittype='1' ORDER BY child.id ASC"; How do i solve this?

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  • Tree data structure in php

    - by Piyush
    in my application user starts a new tree or get added under a child-user and keep on adding users in branches in such a way- >there are 10 level of tree type structure. >root node contain 1 user and each node(user) can have max 5 child-user in this way tree will be like level 0 = 1 user , level 1 = 5 user, level 2 = 25 user , level 3 = 125 user and so on. I created one MySQL table having columns like- User_id , level, super_id, child1_id, child2_id, child3_id, child4_id, child5_id my question is How can I get all child-user(child to child also) of a particular user at any level do I need to add some more columns in my table??

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  • Updating the collections of entities with NHibernate the correct way

    - by karel_evzen
    A simple question regarding how NHibernate works: I have a parent entity that has a collection of other child entities. Those child entities have a reference to the parent entity they belong to. Now I want to implement an Add method to the parent entity that would add a child to it. Should that Add method only add the child to its new parents collection, or should it also update the parent reference of the child or should it also remove the added entity from its previous parents collection? Do I have to do all these things in that method or will NHibernate do something for me? Thanks.

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  • Drawing problem does ShowWindow(hWnd, SW_HIDE) automatically invalidate rectangles?

    - by wk1989
    Hello, I'm running into a problem where, I have a Window that contains a child window. The child window contains another child window where a video is playing using Windows Media Player. Whenever I do call ShowWindow (hWnd, SW_HIDE) on the parent Window and paint over the entire surface, the region occupied by the grand-child window (where the video was playing) is not overridden. I used spy++ and found that that region which was not overridden was set to hidden BEFORE the repaint occurs. I monitored the hwnd of the grand-child window and it did not seem to receive any WM_EraseBKGND or WM_NCPAINT messages. Does this mean the area it occupied had not been invalidated and therefore could not be drawn over? I'm new to winforms. Thanks!

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  • UI updates not happening in the expected order

    - by allonym
    I have a Panel which hosts a number of child controls in a grid layout. The child controls each consist of a Panel with a PictureBox and a Label. When one of these child controls is clicked it becomes "selected" (which basically entails changing its background to a different color) and an event is fired. In the handler for this event, an image is displayed in a PictureBox on a separate form. In code, the background of the child control is definitely changed before firing the event, but for some reason it never updates at runtime until after the image has updated in the other Form. I've tried to Invalidate() and Refresh() the child control before firing the event, without effect. Why is this happening, and what can I do to set it right?

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  • Silverlight Cream for March 15, 2011 -- #1061

    - by Dave Campbell
    In this Issue: Peter Kuhn, Emil Stoychev, Viktor Larsson(-2-), Kevin Hoffman, Rudi Grobler, WindowsPhoneGeek, Jesse Liberty(-2-), and Martin Krüger. Above the Fold: Silverlight: "Image comparison using a GridSplitter" Martin Krüger WP7: "Using WP7 accent color effectively" Viktor Larsson XNA: "XNA for Silverlight developers: Part 7 - Collision detection" Peter Kuhn From SilverlightCream.com: XNA for Silverlight developers: Part 7 - Collision detection Peter Kuhn has part 7 of his XNA for Silverlight devs tutorial series up at SilverlightShow... discussing Collision detection... something you need to get your head around if you're going to do a game. Interview with John Papa about the upcoming MIX11 event and the Open Source Fest Emil Stoychev of SilverlightShow reverses the roles with John Papa and interviews John on this MIX11 and Open Source Fest discussion they had at the MVP Summit Debugging Videos or Camera in WP7 Viktor Larsson has a quick post up on the 3 ways of debugging a WP7 app and why and under what circumstances you should change debug method. Using WP7 accent color effectively Viktor Larsson's next post is about the 10 accent colors available on WP7 devices. He shows how to make best use of that capability in XAML and runtime code. WP7 for iPhone and Android Developers - Hardware and Device Services Kevin Hoffman's part 4 of a 12-part tutorial series at SilverlightShow on WP7 for iPhone/Android devs is up ... this oe concentrates on Hardware and Device Services... Launchers/Choosers/Sensors. How to publish WP7 applications if you live in the Middle-east & Africa region Rudi Grobler has a short post up on a legit way to publish WP7 apps if you are in the MEA region. Creating WP7 Custom Theme – Sample Theme Implementation WindowsPhoneGeek has a new post up and he's starting a series of 3 articles on Creating Wp7 Custom Themes... first up is this tutorial on Basic Theme Implementation... and use it as well. From Android to Windows Phone For "Windows Phone from Scratch #43", Jesse Liberty begins a series on moving apps from Android to WP7, beginning with a tip calculating program. Yet Another Podcast #28–Jeremy Likness Jesse Liberty's next post is his "Yet Another Podcast #28" with Jeremy Likness this time around... the list of all things fun that Jeremy's involved in is getting long... should be a good podcast! Image comparison using a GridSplitter Martin Krüger posted a cool 'Clip Splitter' for comparing images, and what a great set of example images he's using... pretty darn cool lining them up with a grid-splitter. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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  • Silverlight Cream for November 20, 2011 - 2 -- #1170

    - by Dave Campbell
    In this Issue: Michael Washington, Oliver Fuh, Jeremy Likness, Derik Whittaker, Jesse Liberty, Jeff Blankenburg(-2-), and Michael Crump. Above the Fold: Silverlight: "Handling Extremely Large Data Sets in Silverlight" Jeremy Likness WP7: "31 Days of Mango | Day #8: Contacts API" Jeff Blankenburg LightSwitch: "LightSwitch Chat Application Using A Data Source Extension" Michael Washington Shoutouts: Michael Palermo's latest Desert Mountain Developers is up Michael Washington's latest Visual Studio #LightSwitch Daily is up Check out Shawn Wildermuth's take on the AppStore and WP7 in general: 40,000 Apps - What Does It Mean? Be sure to check out Jesse Liberty & Paul Betts new book: Programming Reactive Extensions and LINQ, I've just had a little time to look at mine, but don't let the size fool you... this is the good stuff! From SilverlightCream.com: LightSwitch Chat Application Using A Data Source Extension In his latest LightSwitch post, Michael Washington gives up code that will enable two people using the same LightSwitch app to chat. Great detailed tutorial as usual! Handling AdControl Fetching Exception WindowsPhoneGeek turns the blog reigns over to Oliver Fuh for this post about using the AdControl in your WP7 app and handling a common exception you get with the Microsoft AdControl Handling Extremely Large Data Sets in Silverlight In this excerpt from his book, Jeremy Likness discusses reading *LARGE* data sets with Silverlight using 3 different patterns: OData, WCF RIA Services, and MVVM. Using MVVM with the AutoCompleteTextBox in Silverlight 4 Derik Whittaker takes a break from WinRT to discuss the Silverlight 4 AutoCompleteTextBox and MVVM ... including a custom Behavior to allow the backing property to be updated and a command to trigger background searches Yet Another Podcast #52–Peter Torr on Windows Phone Multitasking Jesse Liberty scored Peter Torr on his Latest Yet Another Podcast .. talking about Multitasking on Windows Phone including background agents, the backstack, and other Mango features 31 Days of Mango | Day #8: Contacts API Jeff Blankenburg's Day 8 is about a new namespace on WP7: Microsoft.Phone.UserData ... now giving us the ability to treat the user's contact list like a local database 31 Days of Mango | Day #9: Calendar API On Day 9 in his series, Jeff Blankenburg revisits the Microsoft.Phone.UserData namespace and looks at another set of data: the calendar Want to Decompile Silverlight XAP files? Try JustDecompile Beta! Michael Crump has a post up about the new free developer productivity tool from Telerik that provides assembly browsing and decompiling: JustDecompile ... Just download it! Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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  • Silverlight Cream for May 05, 2010 -- #856

    - by Dave Campbell
    In this Issue: Jeremy Alles(-2-), Kunal Chowdhury, anand iyer, Yochay Kiriaty(-2-, -3-), Max Paulousky, David Kelley, smartyP, Tim Heuer, and Dan Wahlin. Shoutout: Tim Heuer provides links for all the Ways to give feedback on Silverlight From SilverlightCream.com: [WP7] Bug when using NavigationService in Windows Phone 7 Jeremy Alles has blogged about a bug he found using the Navigation service in WP7. He gives the steps to reproduce and a couple possible workarounds. [WP7] Using the camera in the emulator Jeremy Alles is also digging into the camera functionality in the emulator. He has code demonstrating launching a camera task, and a list of other tasks available. Silverlight Tutorials Chapter 3: Introduction to Panels Kunal Chowdhury has Chapter 3 of his Silverlight 4 Tutorial series up and he's talking about Panels this time out. Push Notifications in Windows Phone 7 developer tools CTP April Refresh anand iyer is discussing the Push Notifications, only from a code perspective. Good information and good additional links to follow. Windows Phone Application Life Cycle Yochay Kiriaty talks with Tudor Toma and Jaime Rodriguez about the WP7 application lifecycle on Channel 9. Understanding Microsoft Push Notifications for Windows Phones Yochay Kiriaty has a 2-part post up on WP7 Push Notifications. The first part is explaining what Push Notifications are and why we need them... as a developer and as an end user viewing Toast or Tile notifications. Understanding How Microsoft Push Notification Works – Part 2 In the 2nd part of his Push Notification series, Yochay Kiriaty discusses how the Push Notification works under the covers. To Remember: Deployment of Silverlight Applications With Wcf Ria Services Max Paulousky has a post up for reference on what to look into when you get "Load Operation Failed" in WCF RIA services. Launching a URL from an OOB Silverlight Application David Kelley has a quick post up on launching URLs from an OOB app. If you haven't tried it, you may be surprised as he was at first. Creating a Windows Phone 7 XNA Game in Landscape Orientation smartyP is looking at recreating a landscape WP7 game in XNA and is detailing some of the issues he's been dealing with, and is also sharing a project file. New Silverlight 4 Themes available–get the raw bits Tim Heuer provided 'raw' versions of 3 new themes. Read his post to see exactly what he means by 'raw' ... they're definitely good looking, and are going to get a lot of play. Handling WCF Service Paths in Silverlight 4 – Relative Path Support Dan Wahlin shares his technique for avoiding the pain involved with ServiceReferences.ClientConfig by using Silverlight 4 relative path support. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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  • Silverlight Cream for February 14, 2011 -- #1047

    - by Dave Campbell
    In this Issue: Mohamed Mosallem, Tony Champion, Gill Cleeren, Laurent Bugnion, Deborah Kurata, Jesse Liberty(-2-), Tim Heuer, Mike Taulty, John Papa, Martin Krüger, and Jeremy Likness. Above the Fold: Silverlight: "Binding to a ComboBox in Silverlight : A Gotcha" Tony Champion WP7: "An Ultra Light Windows Phone 7 MVVM Framework" Jeremy Likness Shoutouts: Steve Wortham has a post up discussing Silverlight 5, HTML5, and what the future may bring From SilverlightCream.com: Silverlight 4.0 Tutorial (12 of N): Collecting Attendees Feedback using Windows Phone 7 Mohamed Mosallem is up to number 12 in his Silverlight tutorial series. He's continuing his RegistrationBooth app, but this time, he's building a WP7 app to give attendee feedback. Binding to a ComboBox in Silverlight : A Gotcha If you've tried to bind to a combobox in Silverlight, you've probably either accomplished this as I have (with help) by having it right once, and continuing, but Tony Champion takes the voodoo out of getting it all working. Getting ready for Microsoft Silverlight Exam 70-506 (Part 5) Gill Cleeren has Part 5 of his exam preparation post up on SilverlightShow. As with the others, he provides many external links to good information. Referencing a picture in another DLL in Silverlight and Windows Phone 7 Laurent Bugnion explains the pitfalls and correct way to reference an image from a dll... good info for loading images such as icons for Silverlight in general and WP7 also. Silverlight MVVM Commanding II Deborah Kurata has a part 2 up on MVVM Commanding. The first part covered the built-in commanding for controls that inherit from ButtonBase... this post goes beyond that into other Silverlight controls. Reactive Drag and Drop Part 1 This Drag and Drop with Rx post by Jesse Liberty is the 4th in his Rx series. He begins with a video from the Rx team and applies reactive programming to mouse movements. Yet Another Podcast #24–Reactive Extensions On the heels of his previous post on Rx, in his latest 'Yet Another Podcast', Jesse Liberty chats with Matthew Podwysocki and Bart De Smet about Reactive Extensions. Silverlight 4 February 2011 Update Released Today Tim Heuer announced the release of the February 2011 Silverlight 4 release. Check out Tim's post for information about what's contained in this release. Blend Bits 25–Templating Part 3 In his 3rd Templating tutorial in BlendBits, Mike Taulty demonstrates the 'Make into Control' option rather than the other way around. Silverlight TV 61: Expert Chat on Deep Zoom, Touch, and Windows Phone John Papa interviews David Kelley in the latest Silverlight TV... David is discussing touch in Silverlight and for WP7 and his WP7 apps in the marketplace. Simple Hyperlinkbutton style Martin Krüger has a cool Hyperlink style available at the Expression Gallery. Interesting visual for entertaining your users. An Ultra Light Windows Phone 7 MVVM Framework Jeremy Likness takes his knowledge of MVVM (Jounce), and WP7 and takes a better look at what he'd really like to have for a WP7 framework. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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  • Silverlight Cream for December 18, 2010 -- #1012

    - by Dave Campbell
    In this Issue: Mark Monster, Kevin Dockx, Jeremy Likness(-2-,-3-), Timmy Kokke, Den Delimarsky, Mike Snow, Samuel Jack(-2-), and Renuka Prasad(-2-). Above the Fold: Silverlight: "Trigger a Storyboard on ViewModel changes" Mark Monster WP7: "Microsoft Push Notification in Windows Phone 7" Renuka Prasad Shoutouts: SilverlightGal sent me the link to The Silverlight Dossier ... I think it's a pretty good start... additions I'd like to see are ways to submit to the various areas. Michael Crump put up a contest that runs from now to January 1st... Win a set of Infragistics Silverlight Controls with Data Visualization!... pretty cool, Michael! If you visit WynApse.com, you'll see I have a subscription to LearnVisualStudio.net... and now they have posted a batch of WP7 videos... 64 of them to be exact... wow!: New video series From SilverlightCream.com: Trigger a Storyboard on ViewModel changes Mark Monster has a great post up about triggering Storyboard on ViewModel changes using the DataTrigger from Blend... cool stuff, and you can also do GoToStateAction or other actions or build yourowndang Trigger Action... fun awaits! ... sorry it took a while to post, Mark... been a tad overloaded here! Working with the Silverlight Rich Text Box control Kevin Dockx has had a post up for a while at SilverlightShow where he takes a good look at the RichText control and it's various capabilities, including source so you can give it a dance yourself. Lessons Learned in Personal Web Page Part 3: Custom Panel and Listbox Jeremy Likness's part 3 of his Personal Web Page lessons learned is covering the tres-cool 3D Panel he did... and he's got it all explained out... building from scratch via a custom panel and a Listbox control... A Silverlight MVVM Feed Reader from Scratch in 30 Minutes Jeremy Likness has a video tutorial showing building an MVVM/Silverlight feedreader in 30 minutes ... plus a couple mods that he noticed after the fact... beat that HTML5 :) Jounce Part 8: Raising Property Changed In Jeremy Likness's latest post, he has number 8 in his series on his MVVM platform, Jounce. This time he's explaining the property changed notification, has a very cool way of doing it, and some interesting comments from readers. Dependency Injection, MVVM, Ninject and Silverlight Timmy Kokke has a great tutorial up with associated demo project on Dependency Injection in MVVM and Silverlight. Some hidden features in the Windows Phone 7 emulator Den Delimarsky shows how to get some of the hidden features on your WP7 emulator like the Call History, Call Settings, and Details about the numbers. Playing sound effects on Windows Phone 7 Mike Snow's latest tip is playing sound effects on your WP7 ... a little bit of XNA here and there, and badabing, badaboom, you got sound! Day 3 of my “Build a Windows Phone 7 game in 3 days” Challenge Samuel Jack has a couple more posts up about his 'Build a WP7 game in 3 Days' challenge... first up is Day 3 from 8:50 to 22:30 ... wow... long day! ... but he's got something good going now... some good external links also Day 3.5 of my “Build a Windows Phone 7 game in 3 days” Challenge Samuel Jack's 3rd day ended with another half-day added on to put on some finishing touches... again, some good external links... and he finished with this Say hello to Simon Squared, my 3.5 day old WP7 Game Microsoft Push Notification in Windows Phone 7 Renuka Prasad has a bunch of material up that I've not been aware of (how did that happen, people??) ... here's the first of a couple of his posts on Code Project ... a very nice tutorial on the Push Notification process... great diagrams and external links. Windows Phone 7 – Toast Notification Using Windows Azure Cloud Service Renuka Prasad has another WP7 post on CodeProject... this one on Toast Notification... and he's using Azure and WCF all rolled into it as well... great diagrams, descriptions and all the code. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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  • LINQ - IEnumerable.Join on Anonymous Result Set in VB.NET

    - by user337501
    I've long since built a way around this, but it still keeps bugging me... it doesnt help that my grasp of dynamic LINQ queries is still shakey. For the example: Parent has fields (ParentKey, ParentField) Child has fields (ChildKey, ParentKey, ChildField) Pet has fields (PetKey, ChildKey, PetField) Child has a foreign key reference to Parent on Child.ParentKey = Parent.ParentKey Pet has a foreign key reference to Child on Pet.Childkey = Child.ChildKey Simple enough eh? Lets say I have LINQ like this... Dim Q = FROM p in DataContext.Parent _ Join c In DataContext.Child On c.ParentKey = p.ParentKey Consider this a "base query" on which I will perform other filtering actions. Now I want to join the Pet table like this: Q = Q.Join(DataContext.Pet, _ Function(a) a.c.ChildKey, _ Function(p As Pet) p.ChildKey, _ Function(a, p As Pet) p.ChildKey = a.c.ChildKey) The above Join call doesnt work. I sort of understand why it doesnt work, but hopefully it'll show you how I tried to accomplish this task. After all this was done I would have appended a Select to finish the job. Any ideas on a better way to do this? I tried it with the PredicateBuilder with little success. I might not know how to use it right but it felt like it wasnt gonna handle the joining.

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  • Nested UIScrollView-iPhone photos application

    - by abhishek trivedi
    Hi, I have been facing the same nested UIScrollView problem for long time.I tried some open source codes like Scrolling madness ,three-20 and others but all fails finaly.I am trying to make a photo Viewer application same as iPhone.For that I have created the structure like this:- 1)one View controller. 2)on view of view controller one UIScrollView (i.e inner/parent scroll view) as a child. 3)on inner/parent scroll view number of child scroll views(i.e. outer/child scroll views) ,each represents one page of photos application. 4)On each scroll view one image View on which i am displaying my image. So what I want is when user scrolls the outer scroll view it should scroll horizontally with all the child views so I will get the look and feel of paging in photos application.Also when user is on one specific image(i.e. child/outer scroll view) he should be able to zoom in/out,swipes and perform single/double tapping.I was able to make it work in sdk 2.1,but it dosnt work since sdk 3.0.Please tell me the idea behind your project.Means which scroll view you are subclassing ,in which view to detect touches.How this completely child - parent relation should be. If possible provide any sample code also.

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  • PHP extensions won't load on Apache startup

    - by WebDevHobo
    I've added php as a module for Apache 2.2.11: LoadModule php5_module "c:/php/php5apache2_2.dll" And also added AddType application/x-httpd-php .php And in PHP.ini, my extension dir is set to: extension_dir = "C:\php\ext" And yes, the directories are correct and all files do exist. But when I start apache, I get these errors: PHP Warning: PHP Startup: Unable to load dynamic library 'C:\php\ext\php_mysql.dll' - The specified module could not be found.\r\n in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library 'C:\php\ext\php_pdo_pgsql.dll' - The specified module could not be found.\r\n in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library 'C:\php\ext\php_pgsql.dll' - The specified module could not be found.\r\n in Unknown on line 0 [Sun May 17 03:46:01 2009] [notice] Apache/2.2.11 (Win32) PHP/5.2.9-2 configured -- resuming normal operations [Sun May 17 03:46:01 2009] [notice] Server built: Dec 10 2008 00:10:06 [Sun May 17 03:46:01 2009] [notice] Parent: Created child process 4652 PHP Warning: PHP Startup: Unable to load dynamic library 'C:\php\ext\php_mysql.dll' - The specified module could not be found.\r\n in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library 'C:\php\ext\php_pdo_pgsql.dll' - The specified module could not be found.\r\n in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library 'C:\php\ext\php_pgsql.dll' - The specified module could not be found.\r\n in Unknown on line 0 [Sun May 17 03:46:01 2009] [notice] Child 4652: Child process is running [Sun May 17 03:46:01 2009] [notice] Child 4652: Acquired the start mutex. [Sun May 17 03:46:01 2009] [notice] Child 4652: Starting 64 worker threads. [Sun May 17 03:46:01 2009] [notice] Child 4652: Starting thread to listen on port 80. So I'm probably forgetting something simple here, can someone tell me what I'm forgetting?

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  • SSIS Intermittent variable error: The system cannot find the file specified

    - by Ben
    Our SSIS pacakges a structured as one Control package and many child packages (about 30) that are invoked from the control package. The child packages are invoked with Execute Package Task. There is one Execute Package Task per child package. Each Execute Package Task uses File Connection Manager to specify path to the child package dtsx file. There is one File Connection Manager per child package. Each File Connection Manager has an expression defined for ConnectionString property. This expression looks like this: @[Template::FolderPackages]+"MyPackage.dtsx", the file name is different for each package. The variable (FolderPackages) is specified in the SSIS package configuration file. The error that is generated during run time is "Error 0x80070002 while loading package file "MyPackage.dtsx". The system cannot find the file specified." The package that fails is different from run to run and sometimes no packages fail at all. This is when run on exactly the same environment/data etc. I ran FileMon during this error and found out that when the error happens SSIS tries to read the dtsx file from a wrong place, namely from system32. I checked that this is identical to what would happen if @[Template::FolderPackages] variable were empty, but because the very same variable is used for every child package and works for some but doesn't work sometimes for others, I have no expalnation to this fact. Anything obvious, or time to raise a support call with Microsoft?

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  • .NET Process.Kill() in a safe way

    - by Orborde
    I'm controlling a creaky old FORTRAN simulator from a VB.NET GUI, using redirected I/O to communicate with the simulator executable. The GUI pops up a "status" window with a progress bar, estimated time, and a "STOP" button (Button_Stop). Now, I want the Button_Stop to terminate the simulator process immediately. The obvious way to do this is to call Kill() on the Child Process object. This gives an exception if it's done after the process has exited, but I can test whether the process is exited before trying to kill it, right? OK, so I do the following when the button is clicked: If Not Child.HasExited Then Child.Kill() Button_Stop.Enabled = False End If However, what if the process happens to exit between the test and the call to Kill()? In that case, I get an exception. The next thing to occur to me was that I can do Button_Stop.Enabled = False in the Process.Exited event handler, and thus prevent the Child.Kill() call in the Button_Stop.Clicked handler. But since the Process.Exited handler is called on a different thread, that still leaves the following possible interleaving: Child process exits. Process.Exited fires, calls Invoke to schedule the Button_Stop.Enabled = False User clicks on Button_Stop, triggering Child.Kill() Button_Stop.Enabled = False actually happens. An exception would then be thrown on step 3. How do I kill the process without any race conditions? Am I thinking about this entirely wrong?

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