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  • Expression Blend doesn't recognize command objects declared in code behind file

    - by Brian Ensink
    I have a WPF UserControl. The code behind file declares some RoutedUICommand objects which are referenced in the XAML. The application builds and runs just fine. However Expression Blend 3 cannot load the XAML in the designer and gives errors like this one: The member "ResetCameraCommand" is not recognized or accessible. The class and the member are both public. Building and rebuilding the project in Blend and restarting Blend hasn't helped. Any ideas what the problem is? Here are fragments of my XAML ... <UserControl x:Class="CAP.Visual.CameraAndLightingControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:CAP.Visual;assembly=VisualApp" Height="100" Width="700"> <UserControl.CommandBindings> <CommandBinding Command="local:CameraAndLightingControl.ResetCameraCommand" Executed="ResetCamera_Executed" CanExecute="ResetCamera_CanExecute"/> </UserControl.CommandBindings> .... ... and the code behind C# namespace CAP.Visual { public partial class CameraAndLightingControl : UserControl { public readonly static RoutedUICommand ResetCameraCommand; static CameraAndLightingControl() { ResetCameraCommand = new RoutedUICommand("Reset Camera", "ResetCamera", typeof(CameraAndLightingControl)); }

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  • Python: Convert format string to regular expression

    - by miracle2k
    The users of my app can configure the layout of certain files via a format string. For example, the config value the user specifies might be: layout = '%(group)s/foo-%(locale)s/file.txt' I now need to find all such files that already exist. This seems easy enough using the glob module: glob_pattern = layout % {'group': '*', 'locale': '*'} glob.glob(glob_pattern) However, now comes the hard part: Given the list of glob results, I need to get all those filename-parts that matched a given placeholder, for example all the different "locale" values. I thought I would generate a regular expression for the format string that I could then match against the list of glob results (or then possibly skipping glob and doing all the matching myself). But I can't find a nice way to create the regex with both the proper group captures, and escaping the rest of the input. For example, this might give me a regex that matches the locales: regex = layout % {'group': '.*', 'locale': (.*)} But to be sure the regex is valid, I need to pass it through re.escape(), which then also escapes the regex syntax I have just inserted. Calling re.escape() first ruins the format string. I know there's fnmatch.translate(), which would even give me a regex - but not one that returns the proper groups. Is there a good way to do this, without a hack like replacing the placeholders with a regex-safe unique value etc.? Is there possibly some way (a third party library perhaps?) that allows dissecting a format string in a more flexible way, for example splitting the string at the placeholder locations?

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  • LINQ to SQL: Reusable expression for property?

    - by coenvdwel
    Pardon me for being unable to phrase the title more exact. Basically, I have three LINQ objects linked to tables. One is Product, the other is Company and the last is a mapping table Mapping to store what Company sells which products and by which ID this Company refers to this Product. I am now retrieving a list of products as follows: var options = new DataLoadOptions(); options.LoadWith<Product>(p => p.Mappings); context.LoadOptions = options; var products = ( from p in context.Products select new { ProductID = p.ProductID, //BackendProductID = p.BackendProductID, BackendProductID = (p.Mappings.Count == 0) ? "None" : (p.Mappings.Count > 1) ? "Multiple" : p.Mappings.First().BackendProductID, Description = p.Description } ).ToList(); This does a single query retrieving the information I want. But I want to be able to move the logic behind the BackendProductID into the LINQ object so I can use the commented line instead of the annoyingly nested ternary operator statements for neatness and re-usability. So I added the following property to the Product object: public string BackendProductID { get { if (Mappings.Count == 0) return "None"; if (Mappings.Count > 1) return "Multiple"; return Mappings.First().BackendProductID; } } The list is still the same, but it now does a query for every single Product to get it's BackendProductID. The code is neater and re-usable, but the performance now is terrible. What I need is some kind of Expression or Delegate but I couldn't get my head around writing one. It always ended up querying for every single product, still. Any help would be appreciated!

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  • Dealing with Expression Blend's lack of support for C++/CLI projects

    - by Brian Ensink
    I have a WPF C# project that references a C++/CLI mixed mode project. I'm having trouble using the WPF project in Expression Blend 3. I'm new to Blend so perhaps this is obvious, but it won't display the xaml designer properly until it builds the project. In my case it complains that my custom commands are not "recognized or accessible" and the solution is to build the project in Blend. But I can't build the project because it references a C++/CLI mixed mode project which Blend won't load. The WPF project is pure C# it just happens to reference a C++/CLI mixed mode project but I'm not asking Blend to do anything with the mixed-mode assembly. How can I work around this problem? Edit: I was able to get it to build by removing the reference to the C++/CLI mixed mode project and replacing it with a reference to the actual assembly. However this is not ideal because in my past experience Visual Studio will not always be able to resolve the reference when switching between release and debug configurations.

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  • Windows Phone 7 Design using Expression Blend - Resources

    - by Nikita Polyakov
    I’ve been doing a series of talks across Florida regarding Windows Phone 7 Design using Microsoft Expression Blend 4. I discuss the WP7 phone and application experience; show how to use Expression Blend toolset to effectively design such apps. Next presentation is on 5/4/2010 at 6:30PM EST will be a webcast format over LiveMeeting at Ft. Lauderdale Online group. Registration and the LiveMeeting link are both here: http://www.fladotnet.com/Reg.aspx?EventID=459 [I will post a link if it’s recorded]   Here are the resources from my presentations: The Biggest source is the Windows Phone UI and Design Language video from MIX10 Windows Phone 7 Design Guide as it’s found on the WP7 Dev Home Page Study The Silverlight Mobile Tutorials on official Silverlight website I will be blogging a separate entry for a new demo app that will showcase the elements I presented. I suggest you actually watch all of the MIX videos about SL and Design as great primer to get you thinking the WP7 way.   A lot happening with WP7Dev and it’s just the beginning! So watch these Twitter accounts and blogs: @Ckindel - Charlie Kindel - WP7 Dev Head http://blogs.msdn.com/ckindel @WP7Dev - Official Dev Twitter @WP7 - Official WP7 Twitter Peter Torr - http://blogs.msdn.com/ptorr Mike Harsh - http://blogs.msdn.com/mharsh Shawn Oster - http://www.shawnoster.com   Other worthwhile mention my local friends speaking and blogging about Windows Phone 7: Bill Reiss is doing great presentations on Building games with XNA for Windows Phone 7. Be on the lookout for those around Florida. Bill is a Silverlight MVP and has a legacy of XNA and Silverlight games, see his site. Kevin Wolf aka ByteMaster he is a Device Application Developer MVP with tremendous experience building mobile applications. He has developed WinMo-GF a multi-platform gaming framework. Get these tools and get creating! You will need the following components installed in this order: Expression Blend 4 Beta Windows Phone Developer Tools Microsoft Expression Blend Add-in Preview for Windows Phone Microsoft Expression Blend SDK Preview for Windows Phone Want more training? Don’t forget that Channel 9 has complete walkthroughs of their WP7 Training Kit posted online. PS: To continue with all this design talk check out Microsoft .toolbox “Learn to create Silverlight applications using Expression Studio and to apply fundamental design principles.” A great website with a lot of design tutorials set up as a wonderful full course on design all for free, including a great forum community and neat little avatars you can build yourself.

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  • Expression 4 ships

    The Expression 4 suite of products shipped today.  Good news, its a free upgrade for Expression 3 owners. New with version 4 is the Expression Studio 4 Web Professional suite.  Basically, its Expression Studio 4 Ultimate without Blend and SketchFlow. var addthis_pub="guybarrette";...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • SSIS - The expression cannot be parsed because it contains invalid elements at the location specifie

    - by simonsabin
    If you get the following error when trying to write an expression there is an easy solution Attempt to parse the expression "@[User::FilePath] + "\" + @[User::FileName] + ".raw"" failed.  The token "." at line number "1", character number "<some position>" was not recognized. The expression cannot be parsed because it contains invalid elements at the location specified. The SSIS expression language is a C based language and the \ is a token, this means you have to escape it with another one. i.e "\" becomes "\\", unlike C# you can't prefix the string with a @, you have to use the escaping route. In summary when ever you want to use \ you need to use two \\

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  • Expression Studio 4 Launch on June 7th

    I cant wait til next week when Expression Studio 4 (Expression Blend, SketchFlow, Expression Web, Expression Design) will launch at the Internet Week conference in New York City on June 7th! I wish I could go, I grew up in NY and still call it home, but there will be a lot of great people there including Blenders: Adam Kinney Arturo Toledo Bill Buxton Christian Schormann Pete Blois Weve shown some of the new features off on Silverlight TV but we have even more to share! Here are...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • SQL Error: ORA-00936: missing expression

    - by user2901548
    Qns: Item Description and the treatment date of all treatments for any patients named Jessie Stange (ie GivenName is Jessie & FamilyName is Stange) What i wrote: SELECT DISTINCT Description, Date as treatmentDate WHERE doothey.Patient P, doothey.Account A, doothey.AccountLine AL, doothey.Item.I AND P.PatientID = A.PatientID AND A.AccountNo = AL.AccountNo AND AL.ItemNo = I.ItemNo AND (p.FamilyName = 'Stange' AND p.GivenName = 'Jessie'); error: Error at Command Line:1 Column:30 Error report: SQL Error: ORA-00936: missing expression 00936. 00000 - "missing expression" *Cause: *Action: What is the missing expression???

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  • Write Your Own Microsoft Expression Blend 3 Addin

    Although there have been numerous articles introducing how to write a Microsoft Expression blend 2 addin, the Microsoft Expression blend 3/4 related ones are few. In this article, you will learn what a Microsoft Expression blend addin is and command the common routine to write an Addin. Finally, you will master the inner workings of the addin through a concrete sample application.

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  • What is the value of a let expression

    - by Grzegorz Slawecki
    From what I understand, every code in f# is an expression, including let binding. Say we got the following code: let a = 5 printfn "%d" a I've read that this would be seen by the compiler as let a = 5 in ( printfn "%d" a ) And so the value of all this would be value of inner expression, which is value of printf. On the other hand, in f# interactive: > let a = 5;; val a : int = 5 Which clearly indicates that the value of let expression is the value bound to the identifier. Q: Can anyone explain what is the value of a let expression? Can it be different in compiled code than in F# interactive?

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  • Expression Studio 4 download

    Microsoft announced the general availability of Expression Studio 4 which includes upgraded versions of Expression Blend (including Sketchflow), Encoder, Web (including SuperPreview) and Design.

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  • Expression Studio 4 Launch of Blend, SketchFlow, Encoder and More!

    Today Expression Studio 4 (which includes Expression Blend, SketchFlow, Expression Web, Expression Design, Expression Encoder) launched at the Internet Week conference in New York City! There are a ton of new features in these products, some of which we have shown off already in some episodes of Silverlight TV a http://silverlight.tv. You can visit www.microsoft.com/expression to find out more about Expression and you can download a trial. Owners of v3 Expression Studio or Expression Web can upgrade...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Can LINQ expression classes implement the observer pattern instead of deferred execution?

    - by Tormod
    Hi. We have issues within an application using a state machine. The application is implemented as a windows service and is iteration based (it "foreaches" itself through everything) and there are myriads of instances being processed by the state machine. As I'm reading the MEAP version of Jon Skeets book "C# in Depth, 2nd ed", I'm wondering if I can change the whole thing to use linq expression instances so that guards and conditions are represented using expression trees. We are building many applications on this state machine engine and would probably greatly benefit from the new Expression tree visualizer in VS 2010 Now, simple example. If I have an expression tree where there is an OR Expression condition with two sub nodes, is there any way that these can implement the observer pattern so that the expression tree becomes event driven? If a condition change, it should notify its parent node (the OR node). Since the OR node then changes from "false" to "true", then it should notify ITS parent and so on. I love the declarative model of expression trees, but the deferred execution model works in opposite direction of the control flow if you want event based "live" conditions. Am I off on a wild goose chase here? Or is there some concept in the BCL that may help me achieve this?

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  • DirectX10 How to use Constant Buffers

    - by schnozzinkobenstein
    I'm trying to access some variables in my shader, but I think I'm doing this wrong. Say I have a constant buffer that looks like this: cbuffer perFrame { float foo; float bar; }; I got an ID3D10EffectConstantBuffer reference to it, and I can get a specific index by calling GetMemberByIndex, but how can I figure out how many members perFrame has so that I can get each member without going out of bounds?

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  • DirectX 11 Constant Buffers vs Effect Framework

    - by Alex
    I'm having some trouble understanding the differences between using constant buffers or using the effect framework of DirectX11 for updating shader constants. From what I understand they both do exactly the same thing, although from reading the documentation it appears as if using effects is meant to be 'easier'. However they seem the same to me, one uses VSSetConstantBuffers and the other GetConstantBufferByName. Is there something I'm missing here?

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  • Is there a config option in PHP to prevent undefined constants from being interpreted as strings?

    - by mrbinky3000
    This is from the php manual: http://us.php.net/manual/en/language.constants.syntax.php If you use an undefined constant, PHP assumes that you mean the name of the constant itself, just as if you called it as a string (CONSTANT vs "CONSTANT"). An error of level E_NOTICE will be issued when this happens. I really don't like this behavior. If I have failed to define a required constant, I would rather the script fail so that I am forced define it. Is there any way to force PHP to crash the script if it tries to use an undefined constant? For example. Both of these scripts do the same thing. <?php define('DEBUG',1); if (DEBUG) echo('Yo!'); ?> and <?php if(DEBUG) echo('Yo!'); ?> I would rather the second script DIE and declare that it tried to use an undefined constant DEBUG.

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  • Render Silverlight Animation to video file

    - by VOliveira
    Hi guys I need to be able to render a silverlight storyboard animation to video. The animated content itself could be simple UIElements, Images or even two or more videos playing at the same time. Several ideas came to mind like RenderTargetBitmap on a single frame basis, but: 1) I've never tested this against video embedded content 2) Don't know how to actually compose the video from the generated images. Expression Encoder was also on my mind, but I don't know if it's possible to integrate it in a Silverlight/XBAP app to fulfill what's expected from it. What's your opinion on this?

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  • Member "TextTrimming" is not recognized in Expression Blend?

    - by emalamisura
    So I am using Silverlight 4.0 I have the following code but its giving me the following error: "The member "TextTrimming" is not recognized or is not accessible", but it works fine when I run in Visual Studio 2010. <TextBlock Margin="0,30,28.789,50.455" TextWrapping="Wrap" TextTrimming="WordEllipsis" HorizontalAlignment="Right" Width="117" RenderTransformOrigin="0.5,0.5" UseLayoutRounding="False" d:LayoutRounding="Auto" Text="This is some text in a sticky note for the sake of making sure that the text will fit and that the user can see all the necessary details that are going to be available and stuff" LineHeight="-1" FontWeight="Normal"> <TextBlock.RenderTransform> <TransformGroup> <ScaleTransform/> <SkewTransform AngleX="8"/> <RotateTransform/> <TranslateTransform/> </TransformGroup> </TextBlock.RenderTransform>

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  • Expression Studio 4 Premium & SketchFlow: Am I screwed?

    - by Refracted Paladin
    Through work I have an Visual Studio Premium with MSDN subscription that I love. However, my biggest disappointment of the last 12 months was discovering that our 2nd from the top level subscription was not enough to get me Sketchflow! This sucks and I am borderline distraught! What are my options? Upgrading to an Ultimate subscription for Sketchflow is out of the question. Am I forced, then, to stay with Blend 3 or Purchase Blend 4 seperately? If this is not a question I should ask here please inform and I'll delete. I just tend to default to SO for all questions that Google can't answer and Google did not answer this one.

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