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• Rails: keeping DRY with ActiveRecord models that share similar complex attributes

  - by Greg

  This seems like it should have a straightforward answer, but after much time on Google and SO I can't find it. It might be a case of missing the right keywords. In my RoR application I have several models that share a specific kind of string attribute that has special validation and other functionality. The closest similar example I can think of is a string that represents a URL. This leads to a lot of duplication in the models (and even more duplication in the unit tests), but I'm not sure how to make it more DRY. I can think of several possible directions... create a plugin along the lines of the "validates_url_format_of" plugin, but that would only make the validations DRY give this special string its own model, but this seems like a very heavy solution create a ruby class for this special string, but how do I get ActiveRecord to associate this class with the model attribute that is a string in the db Number 3 seems the most reasonable, but I can't figure out how to extend ActiveRecord to handle anything other than the base data types. Any pointers? Finally, if there is a way to do this, where in the folder hierarchy would you put the new class that is not a model? Many thanks.

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• Digital Storage for Airline Entertainment

  - by Bill Evjen

  by Thomas Coughlin Common flash memory cards The most common flash memory products currently in use are SD cards and derivative products (e.g. mini and micro-SD cards) Some compact flash used for professional applications (such as DSLR cameras) Evolution of leading flash formats Standardization –> market expansion Market expansion –> volume iNAND –> focus is on enabling embedded X3 iSSD –> ideal for thin form factor devices Flash memory applications Phones are the #1 user of flash memory Flash memory is used as embedded and removable storage in many mobile applications Flash memory is being used in computers as USB sticks and SSDs Possible use of flash memory in computer combined with HDDs (hybrid HDDs and paired or dual storage computers) It can be a removable card or an embedded card These devices can only handle a specific number of writes Flash memory reads considerably quicker than hard drives Hybrid and dual storage in computers SSDs can provide fast performance but they are expensive HDDs can provide cheap storage but they are relatively slow Combining some flash memory with a HDD can provide costs close to those of HDDs and performance close to flash memory Seagate Momentus XT hybrid HDD Various dual storage offerings putting flash memory with HDDs Other common flash memory devices USB sticks All forms and colors Used for moving files around Some sold with content on them (Sony Movies on USB sticks) Solid State Drives (SSDs) Floating Gate Flash Memory Cell When a bit is programmed, electrons are stored upon the floating gate This has the effect of offsetting the charge on the control gate of the transistor If there is no charge upon the floating gate, then the control gate’s charge determines whether or not a current flows through the channel A strong charge on the control gate assumes that no current flows. A weak charge will allow a strong current to flow through. Similar to HDDs, flash memory must provide: Bit error correction Bad block management NAND and NOR memories are treated differently when it comes to managing wear In many NOR-based systems no management is used at all, since the NOR is simply used to store code, and data is stored in other devices. In this case, it would take a near-infinite amount of time for wear to become an issue since the only time the chip would see an erase/write cycle is when the code in the system is being upgraded, which rarely if ever happens over the life of a typical system. NAND is usually found in very different application than is NOR Flash memory wears out This is expected to get worse over time Retention: Disappearing data Bits fade away Retention decreases with increasing read/writes Bits may change when adjacent bits are read Time and traffic are concerns Controllers typically groom read disturb errors Like DRAM refresh Increases erase/write frequency Application characteristics Music – reads high / writes very low Video – r high / writes very low Internet Cache – r high / writes low On airplanes Many consumers now have their own content viewing devices – do they need the airlines? Is there a way to offer more to consumers, especially with their own viewers Additional special content tie into airplane network access to electrical power, internet Should there be fixed embedded or removable storage for on-board airline entertainment? Is there a way to leverage personal and airline viewers and content in new and entertaining ways?

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• Fastest image iteration in Python

  - by Greg

  I am creating a simple green screen app with Python 2.7.4 but am getting quite slow results. I am currently using PIL 1.1.7 to load and iterate the images and saw huge speed-ups changing from the old getpixel() to the newer load() and pixel access object indexing. However the following loop still takes around 2.5 seconds to run for an image of around 720p resolution: def colorclose(Cb_p, Cr_p, Cb_key, Cr_key, tola, tolb): temp = math.sqrt((Cb_key-Cb_p)**2+(Cr_key-Cr_p)**2) if temp < tola: return 0.0 else: if temp < tolb: return (temp-tola)/(tolb-tola) else: return 1.0 .... for x in range(width): for y in range(height): Y, cb, cr = fg_cbcr_list[x, y] mask = colorclose(cb, cr, cb_key, cr_key, tola, tolb) mask = 1 - mask bgr, bgg, bgb = bg_list[x,y] fgr, fgg, fgb = fg_list[x,y] pixels[x,y] = ( (int)(fgr - mask*key_color[0] + mask*bgr), (int)(fgg - mask*key_color[1] + mask*bgg), (int)(fgb - mask*key_color[2] + mask*bgb)) Am I doing anything hugely inefficient here which makes it run so slow? I have seen similar, simpler examples where the loop is replaced by a boolean matrix for instance, but for this case I can't see a way to replace the loop. The pixels[x,y] assignment seems to take the most amount of time but not knowing Python very well I am unsure of a more efficient way to do this. Any help would be appreciated.

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• Renoise and dssi and jack

  - by Bojan

  This may be a little complicated, but, is jack a necessity? I mean, i use renoise, and, since i dont have the need for low latencies, do i really need to use it? My basic setup ( or workflow ) is that i use csound to render stuff to wav, then import it as a sample in renoise. That goes with field recordings, my own samples, etc. So, i dont need ultra low latencies, and i dont need to patch "cords", but i want to use dssi plugins, and dssi-vst. What would be something of a minimum requirements of apps that should work. Can renoise load dssi-vst plugins by itself or do i need to use jack to patch thru or something third, i tried to read lot of articles but i got lost in the different setups...

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• Real-time wmv video encoding in C#

  - by Greg Roberts

  How to encode video on the fly and send it trough the network from C#? Can't find a suitable library. I need to encode in WMV and don't mind if the actual encoding is made in C++ as long as the library has a .NET assembly available. Thanks

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• iPhone: Set the title of a UIButton with a single method invocation?

  - by Greg Maletic

  I'd like to set the title of a UIButton via code. I find myself having to call -[UIButton setTitle:forState:] for UIControlStateNormal, UIControlStateHighlighted, UIControlStateDisabled, UIControlStateSelected. And that doesn't even take into account all of the combinations of these states together. Needless to say, this is tiresome. Is there a single call I can make that will set one string as the title for all of the states? (Since, I assume that in 95% of the cases, that's the desired behavior?)

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• My Windows Service crashes with "the key does not exist in the appSettings configuration section"

  - by Greg

  There is the same question listed under http://stackoverflow.com/questions/427007/the-key-userid-does-not-exist-in-the-appsettings-configuration-section, but unfortunately none of the answers worked in my case. All was working fine, I checked everything in and when I opened the solution again, it started crashing on the above. I cannot find any hint of what I am doing wrong. Any ideas? <?xml version="1.0" encoding="utf-8" ?> <configuration> <appSettings> <add key="URI" value="http://123.123.123.123:8080/smsxml/collector" /> <add key="Provider" value="123" /> <add key="LongCode" value="+123" /> <add key="PassWord" value="123" /> </appSettings> </configuration>

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• Navigate between screens in WPF

  - by Greg R

  This should be a very basic design question, but for some reason it doesn't seem to be well documented (maybe due to its simplicity?). If I'm building a dashboard application in WPF that brig up different CRM tasks and I want to navigate between screens, is this the best way to do this, or is there a better way? So for example I have Log In Screen - Main Menu Screen - Screen to one of different utilities var orderManagerWindow = new MyXamlView(); var loginWindow = Application.Current.MainWindow; orderManagerWindow.Left = loginWindow.Left; orderManagerWindow.Top = loginWindow.Top; Application.Current.MainWindow = orderManagerWindow; orderManagerWindow.Show(); loginWindow.Close(); I would really appreciate help and suggestions!

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• CATiledLayer blanking tiles before drawing contents

  - by Greg Plesur

  All, I'm having trouble getting behavior that I want from CATiledLayer. Is there a way that I can trigger the tiles to redraw without having the side-effect that their areas are cleared to white first? I've already subclassed CATiledLayer to set fadeDuration to return 0. To be more specific, here are the details of what I'm seeing and what I'm trying to achieve: I have a UIScrollView with a big content size...~12000x800. Its content view is a UIView backed by a CATiledLayer. The UIView is rendered with a lot of custom-drawn lines Everything works fine, but the contents of the UIView sometimes change. When that happens, I'd like to redraw the tiles as seamlessly as possible. When I use setNeedsDisplay on the view, the tiles redraw but they are first cleared to white and there's a fraction-of-a-second delay before the new content is drawn. I've already subclassed CATiledLayer so that fadeDuration is set to 0. The behavior that I want seems like it should be possible...when you zoom in on the scrollview and the content gets redrawn at a higher resolution, there's no blanking before the redraw; the new content is drawn right on top of the old one. That's what I'm looking for. Thanks; I appreciate your ideas. Update: Just to follow up - I realized that the tiles weren't being cleared to white before the redraw, they're being taken out entirely; the white that I was seeing is the color of the view that's beneath my CATiledLayer-backed view. As a quick hack/fix, I put a UIImageView beneath the UIScrollView, and before triggering a redraw of the CATiledLayer-backed view I render its visible section into the UIImageView and let it show. This smooths out the redraw significantly. If anyone has a better solution, like keeping the redraw-targeted tiles from going away before being redrawn in the first place, I'd still love to hear it.

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• How do you mark class with TypeConverter that is not in referenced solution?

  - by Greg McGuffey

  I have a class that I've written a TypeConverter for. I want to keep the TypeConverter separate from the main solution, as it is only needed at design time and have an extensibility project now that contains the TypeConverter. Thus, when I deploy, I don't need to deploy the extensibility assembly at all. However, I can't figure out the appropriate string to use in the attribute to actually connect the class to the converter. Note I can't use this: [TypeConverter(typeof(MyConverter)] because MyConverter is in a project that isn't referenced. I need to use the string overload, but can't figure out what to use: [TypeConverter("what the heck goes in here!")] I think I need maybe a path to the assembly, maybe a GUID, the class name...just not sure...

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• Example of configuring wxStyledTextCtrl/wxScintilla control as code editor for custom language

  - by Greg

  How do you enable actions like Goto line number Find(/Replace) There don't appear to be default triggers for these actions. There are a bunch of methods on the control, but I'm missing the first step of how to get the 'events' that would trigger these. For instance, how does one hook ctrl+f or F3/Alt+F3 in the control and make them do a find? Should I be looking at each key using EVT_STC_KEY? Would also like any examples of using this control with Custom language definition (say something similar to C++, but not C++) Auto completion (basic keywords to start, or including variables)

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• Winforms - what's a cool taskbar/system tray notifier approach?

  - by Greg

  Hi What's a cool taskbar/system tray notifier approach? To get that latest cool looking sliding windows type notifications can I stay WinForms, or do I need to go WFP? Which control/class/framework should I look at? Basically after a more fresher:modern looking UI than the old winforms popular bubbles etc

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• Advice for Windows XP Scripting, WSH versus PowerShell

  - by Greg Graham

  After much experience scripting in the Unix/Linux open-source world, using languages such as Bourne Shell, Perl, Python, and Ruby, I now find myself needing to do some Windows XP admin scripting. It appears that the legacy environment is Windows Script Host (WSH), which can use various scripting languages, but the primary language is VBScript, and is based on COM objects. However, the future appears to be Windows PowerShell, which is based on .NET. I haven't done Basic since Applesoft in the 70s, so I'm not keen on learning VBScript, although I did learn enough to write a small script to mount network drives. If I'm going to spend time to really learn this, I'm leaning towards investing my time in the .NET PowerShell environment, if it truly is the future. I did some C# Windows Forms programming a couple of years ago, so I have some exposure to .NET, which also makes PowerShell attractive. Understanding that no one has a crystal ball to predict the future of Microsoft, I would like hear from anyone who is a PowerShell user and thinks it's worthwhile, or if there is anyone that knows of serious drawbacks to PowerShell, and recommends that I stay away from it. Update: I ended up using WSH/VBScript for a particular script that I am installing as a startup script on user's Windows XP workstations. All I have to do is copy it to their Startup folder, and I'm done. However, I only learned enough WSH to accomplish this one job. I am glad to see that PowerShell is the future, and when I have more complicated scripting tasks, I'll to turn PowerShell.

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• Workflows not starting after fresh install

  - by Greg McGuffey

  I just installed Dynamics CRM 4.0. It is working nicely except for workflows. They won't start. I turned on tracing and it appears that there is an IO error. The server is setup with IFD and SSL. No issues accessing it internally or externally. Here is the trace: # CRM Tracing Version 2.0 # LocalTime: 2010-06-08 11:34:58.2 # Categories: # CallStackOn: No # ComputerName: FOX-CRM1 # CRMVersion: 4.0.7333.2741 # DeploymentType: OnPremise # ScaleGroup: # ServerRole: AppServer, AsyncService, DiscoveryService, WebService, ApiServer, HelpServer, DeploymentService [2010-06-08 11:34:58.2] Process:CrmAsyncService |Organization:821a137e-7191-49a4-86cc-69101e2b6d20 |Thread: 24 |Category: Platform.Async |User: 00000000-0000-0000-0000-000000000000 |Level: Error | AsyncOperationCommand.Execute >Exception while trying to execute AsyncOperationId: {DF68F483-2C73-DF11-9A34-18A9053B7B38} AsyncOperationType: 1 - System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a send. ---> System.IO.IOException: The handshake failed due to an unexpected packet format. at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult) at System.Net.TlsStream.CallProcessAuthentication(Object state) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Net.TlsStream.ProcessAuthentication(LazyAsyncResult result) at System.Net.TlsStream.Write(Byte[] buffer, Int32 offset, Int32 size) at System.Net.PooledStream.Write(Byte[] buffer, Int32 offset, Int32 size) at System.Net.ConnectStream.WriteHeaders(Boolean async) --- End of inner exception stack trace --- at System.Web.Services.Protocols.WebClientProtocol.GetWebResponse(WebRequest request) at System.Web.Services.Protocols.HttpWebClientProtocol.GetWebResponse(WebRequest request) at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) at Microsoft.Crm.SdkTypeProxy.CrmService.Retrieve(String entityName, Guid id, ColumnSetBase columnSet) at Microsoft.Crm.Asynchronous.SdkTypeProxyCrmServiceWrapper.Retrieve(String entityName, Guid id, ColumnSetBase columnSet) at Microsoft.Crm.Asynchronous.SdkPluginDescriptionProvider.GetPluginTypeDescription(Guid pluginTypeId, IOrganizationContext context) at Microsoft.Crm.Caching.PluginTypeCacheLoader.LoadCacheData(Guid key, IOrganizationContext context) at Microsoft.Crm.Caching.CrmMultiOrgCache`2.CreateEntry(TKey key, IOrganizationContext context) at Microsoft.Crm.Caching.CrmSharedMultiOrgCache`2.LookupEntry(TKey key, IOrganizationContext context) at Microsoft.Crm.Caching.PluginTypeCache.LookupEntry(Guid pluginTypeId, IOrganizationContext context) at Microsoft.Crm.Asynchronous.AsyncOperationCommand.GetPluginType(Guid pluginTypeId) at Microsoft.Crm.Asynchronous.EventOperation.InternalExecute(AsyncEvent asyncEvent) at Microsoft.Crm.Asynchronous.AsyncOperationCommand.Execute(AsyncEvent asyncEvent) The only thing I've tried to to update the AsyncSdkRootDomain row in the Deployment table to match the ADSdkRootDomain and the ADApplicationRootDomain values. It was blank. That didn't appear to work. After some more research, I think this might be caused because the Asynch service can't access the SDK web services using SSL. If this is correct, how would one configure a CRM server for secure access, internal and external (IFD) and still allow asynch service to hit web site? Thanks for your help!

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• WPF ComboBox TemplateBinding to selected value

  - by Greg R

  I'm trying to create an editable textbox via a drop down of selected values. Basically in Red Only mode I want the drop down to be a disabled textbox. It works fine when I do this with SelectedValue but when I need it to display the dropdown text and not the value. This is what I have: <Style x:Key="EditableDropDownValueOnly" TargetType="ComboBox"> <Setter Property="Width" Value="Auto" /> <Setter Property="FontSize" Value="11" /> <Setter Property="HorizontalAlignment" Value="Left" /> <Setter Property="FontFamily" Value="Verdana" /> <Setter Property="MinWidth" Value="25" /> <Style.Triggers> <Trigger Property="IsReadOnly" Value="True"> <Setter Property="Background" Value="#FFFFFF" /> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="ComboBox"> <TextBox Text="{TemplateBinding SelectedItem, Converter={StaticResource StringCaseConverter}}" BorderThickness="0" Background="Transparent" FontSize="{TemplateBinding FontSize}" HorizontalAlignment="{TemplateBinding HorizontalAlignment}" FontFamily="{TemplateBinding FontFamily}" Width="{TemplateBinding Width}" TextWrapping="Wrap"/> </ControlTemplate> </Setter.Value> </Setter> </Trigger> </Style.Triggers> </Style> SelectedItem is a KeyValuePair, since my drop down is bound to a dictionary. I'm trying to display the "Value" element in my template. Is that possible? Thanks a lot!

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• In separate data access & business logic layer, can I use Entity framework classes in business layer

  - by Greg

  In separate data access & business logic layer, can I use Entity framework classes in business layer? EDIT: I don't think I will need to swap out the data access layer from my business logic in the future (i.e. will be SQL Server), however I will for the UI layer. Therefore the question is more meant to be are there any major issues with using EF classes for me in the business layer? Seems like there would be less plumbing code.

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• How to implement UIViewController rotation in response to orientation changes?

  - by Greg Maletic

  My app has about 10 different UIViewControllers, just one of which I want to switch to landscape mode if the device is rotated. (All the rest, I want to keep in portrait.) In order to implement rotation on that one view, I needed to implement its controller's 'shouldAutorotate' method and return YES. Since this view is accessed via a navigation controller, I also needed to create a subclass of UINavigationController that implements 'shouldAutorotate' and return YES. This solution works, but too well. I find that all of the UIViewControllers I push onto my subclass of UINavigationController respond to rotation, even if I implement 'shouldAutorotate' and return NO. (Remember: I only want one particular UIViewController to respond to rotation, not every one in the navigation controller's stack.) So, my question is: how do I best do this? All the solutions I can come up with seem 1) cumbersome, and 2) worse, don't seem to work. Thanks very much.

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• Winforms-how do I keep window fully painted/responsive during a long running synchronous request is

  - by Greg

  Hi, Background - For a winforms 3.5 c# application, I would like to keep the main window fully painted/responsive during a long running synchronous request. For example if the user moves the window. Question - Is there a way to achive this WITHOUT having to setup a separate thread or backgroundworker process? (e.g. like a way to call from within my long running transaction, "release a bit of CPU to mainform", at some points) thanks

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• How can I hot deploy using the glassfish adapter in Eclipse

  - by Greg

  Has anyone gotten the glassfish v3 adapter to work with Eclipse without restarting every time there's a code change? I tried to set this up but the adapter "republishes" every time I change any file, which is very annoying. It takes up to 3 minutes and locks up my machine for a second. I must remember to constantly stop the adapter before making any changes. I'd settle for just disabling this "feature", but even if I uncheck "publish change immediately" this behavior still happens. I'm using the latest version of the glassfish adapter and tried with eclipse 3.5 and the 3.6 milestone builds.... What setup is everyone using if you have glassfish v3 as your server? Is there any way to actually get the hot deploy feature to work correctly?

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• Javascript crc32 function and PHP crc32 not matching

  - by Greg Frommer

  Hello everyone, I'm working on a webapp where I want to match some crc32 values that have been generated server side in PHP with some crc32 values that I am generating in Javascript. Both are using the same input string but returning different values. I found a crc32 javascript library on webtoolkit, found here: "http://www.webtoolkit.info/javascript-crc32.html" ... when I try and match a simple CRC32 value that I generate in PHP, for the life of me I can't generate the same matching value in the Javascript crc32 function. I tried adding a utf-8 language encoding meta tag to the top of my page with no luck. I've also tried adding a PHP utf8_encode() around the string before I enter it into the PHP crc32 function, but still no matching crc's .... Is this a character encoding issue? How do I get these two generated crc's to match? Thanks everyone! /** * * Javascript crc32 * http://www.webtoolkit.info/ * **/ function crc32 (str) { function Utf8Encode(string) { string = string.replace(/\r\n/g,"\n"); var utftext = ""; for (var n = 0; n < string.length; n++) { var c = string.charCodeAt(n); if (c < 128) { utftext += String.fromCharCode(c); } else if((c > 127) && (c < 2048)) { utftext += String.fromCharCode((c >> 6) | 192); utftext += String.fromCharCode((c & 63) | 128); } else { utftext += String.fromCharCode((c >> 12) | 224); utftext += String.fromCharCode(((c >> 6) & 63) | 128); utftext += String.fromCharCode((c & 63) | 128); } } return utftext; }; str = Utf8Encode(str); var table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if (typeof(crc) == "undefined") { crc = 0; } var x = 0; var y = 0; crc = crc ^ (-1); for( var i = 0, iTop = str.length; i < iTop; i++ ) { y = ( crc ^ str.charCodeAt( i ) ) & 0xFF; x = "0x" + table.substr( y * 9, 8 ); crc = ( crc >>> 8 ) ^ x; } return crc ^ (-1); };

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• ASP.NET MVC, Webform hybrid

  - by Greg Ogle

  We (me and my team) have a ASP.NET MVC application and we are integrating a page or two that are Web Forms. We are trying to reuse the Master Page from our MVC part of the app in the WebForms part. We have found a way of rendering an MVC partial view in web forms, which works great, until we try and do a postback, which is the reason for using a WebForm. The Error: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. The Code to render the partial view from a WebForm (credited to "How to include a partial view inside a webform"): public static class WebFormMVCUtil { public static void RenderPartial(string partialName, object model) { //get a wrapper for the legacy WebForm context var httpCtx = new HttpContextWrapper(System.Web.HttpContext.Current); //create a mock route that points to the empty controller var rt = new RouteData(); rt.Values.Add("controller", "WebFormController"); //create a controller context for the route and http context var ctx = new ControllerContext( new RequestContext(httpCtx, rt), new WebFormController()); //find the partial view using the viewengine var view = ViewEngines.Engines.FindPartialView(ctx, partialName).View; //create a view context and assign the model var vctx = new ViewContext(ctx, view, new ViewDataDictionary { Model = model }, new TempDataDictionary()); //ERROR OCCURS ON THIS LINE view.Render(vctx, System.Web.HttpContext.Current.Response.Output); } } My only experience with this error is in context of a web farm, which is not the case. Also, I understand that the machine key is used for decrypting the ViewState. Any information on how to diagnose this issue would be appreciated. A Work-around: So far the work-around is to move the header content to a PartialView, then use an AJAX call to call a page with just the Partial View from the WebForms, and then using the PartialView directly on the MVC Views. Also, we are still able to share non-tech-specific parts of the Master Page, i.e. anything that is not MVC specific. Still yet, this is not an ideal solution, a server-side solution is still desired. Also, this solutino has issues when working with controls that have more sophisticated controls, using JavaScript, particularly dynamically generated script as used by 3rd party controls.

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• Best Practices for Sanitizing SQL inputs Using JavaScript?

  - by Greg Bulmash

  So, with HTML5 giving us local SQL databases on the client side, if you want to write a select or insert, you no longer have the ability to sanitize third party input by saying $buddski = mysql_real_escape_string($tuddski) because the PHP parser and MySQL bridge are far away. It's a whole new world of SQLite where you compose your queries and parse your results with JavaScript. But while you may not have your whole site's database go down, the user who gets his/her database corrupted or wiped due to a malicious injection attack is going to be rather upset. So, what's the best way, in pure JavaScript, to escape/sanitize your inputs so they will not wreak havoc with your user's built-in database? Scriptlets? specifications? Anyone?

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• Silverlight: how to modify the width of ListBox Items in response to user input?

  - by sympatric greg

  I have a simple Silverlight 3 UserControl whose width increases or decreases based on user input. The controls become more wide or more narrow as desired, except for the ListBox items. The ListBox Items grow horizontally to fit their content regardless of HorizontalContentAlignment being set to 'Stretch'. Should I be able to set a property on ListBox.ItemContainerStyle to tell it to widen/narrow with the parent ListBox? There needs to be no horizontal scrolling within this Listbox. Or is there a way to specify the ItemTemplate's StackPanel width that can be modified at runtime? I have bound this to a StaticResource, but do not understand whether I should be able to change the resource value. Can I create and bind to a DependencyProperty of the UserControl itself? I have not determined the syntax of this within the xaml. code: <UserControl x:Class="TheAssembly.GraphicViewer" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:userControls="clr-namespace:TheAssembly" xmlns:core="clr-namespace:System;assembly=mscorlib"> <UserControl.Resources> <userControls:DictionaryAttributeConverter x:Name="MyDictionaryAttributeConverter" /> <core:Double x:Key="ListItemWidth">155</core:Double> </UserControl.Resources> <Grid x:Name="LayoutRoot" Width="175" > <Border Style="{StaticResource DraggableWindowBorder}"> <StackPanel x:Name="RootStackPanel" Orientation="Vertical" HorizontalAlignment="Stretch"> <Border Background="Black" HorizontalAlignment="Stretch" Margin="0"> <TextBlock x:Name="Header" Foreground="White" FontSize="14" TextWrapping="Wrap" Margin="2,0,2,0" Height="25" HorizontalAlignment="Left" Text="{Binding HeaderText}"/> </Border> <TextBlock x:Name="Title" Style="{StaticResource GraphicViewerDetail}" FontSize="12" FontWeight="Medium" TextWrapping="Wrap" Text="{Binding Title}" Margin="3,0,0,0" HorizontalAlignment="Left"/> <ListBox x:Name="AttributeListBox" ItemsSource="{Binding Attributes}" BorderBrush="Red" HorizontalContentAlignment="Stretch" Foreground="AntiqueWhite" Background="Transparent" IsEnabled="False" HorizontalAlignment="Stretch" ScrollViewer.VerticalScrollBarVisibility="Visible" ScrollViewer.HorizontalScrollBarVisibility="Hidden"> <ListBox.ItemContainerStyle> <Style TargetType="ListBoxItem"> <Setter Property="HorizontalAlignment" Value="Stretch"/> <Setter Property="HorizontalContentAlignment" Value="Stretch"/> <Setter Property="Margin" Value="0,-2,0,0"/> </Style> </ListBox.ItemContainerStyle> <ListBox.ItemTemplate> <DataTemplate> <StackPanel x:Name="ListBoxItemStackPanel" HorizontalAlignment="Stretch" Orientation="Vertical" > <TextBlock FontSize="10" Text="{Binding Key}" Foreground="White" FontWeight="Bold" HorizontalAlignment="Stretch" Margin="2,0,0,0" TextWrapping="Wrap"/> <TextBlock FontSize="10" Text="{Binding Value}" Foreground="White" Margin="6,-2,0,0" TextWrapping="Wrap" HorizontalAlignment="Stretch" /> </StackPanel> </DataTemplate> </ListBox.ItemTemplate> </ListBox> </StackPanel> </Border> </Grid>

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• Ruby Enterprise Edition crashes in gc_sweep

  - by Greg

  My Rails application crashes intermittently with the following message: /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/multibyte/utils.rb:52: [BUG] gc_sweep(): unknown data type 0x0(0xbdc2ca0) ruby 1.8.7 (2009-12-24 patchlevel 248) [i686-linux], MBARI 0x8770, Ruby Enterprise Edition 2010.01 I am running the app on Nginx / Passenger. Ruby 1.8.7 Enterprise Edition 2010.10, Rails 2.3.5, Ubuntu 9.10 32bit. Does anybody have an idea how to fix this?

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• How can I schedule tasks in a WinForms app?

  - by Greg

  QUESTION: How can I schedule tasks in a WinForms app? That is either (a) what is the best approach / .NET classes/methods to use of (b) if there is an open source component that does this well which one would be recommended. BACKGROUND: Winforms app (.NET v3.5, C#, VS2008) I'm assuming I will run the winforms application always, and just minimise to the system tray when not in use Want a simple approach (didn't want to get into separate service running that UI winforms app talks to etc) Want to be able to let the user select how often to schedule the sync (e.g. hourly, daily - pick time, etc) Ability to at the times when the scheduler fires to run a chunk of code (assume it could be wrapped as a backgroundworker task for example) The application is always running & appears in the system tray

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