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• Connection Pool error LINQ to SQL

  - by Ved

  Guys, In Our project I have used LINQ to SQL for every kind of database interaction. Now from what I know , When I create and use DataContext object : it opens the connection , crates a transaction , perform the query and closes the connection. Every now and then we are getting Connection pool error on our services and Server. " The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached. " Any idea ? Am I completely off here ? Is this related to SQL Server itself ? We are using LINQ , .Net 3.5 and Sql Server 2008 NOTE: NO DATAREADER IS BEING USED ANYWHERE IN SYSTEM. Thanks

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• How to load a UIView from a NIB?

  - by Winder

  I have been using UIViewControllers and initWithNibName with much success, basically using them as a convenient way to design the view with Interface Builder. Unfortunately I have built a hierarchy of views before noticing this line in the UIViewController documentation: Note: You should not use view controllers to manage views that fill only a part of their window My question is this: Having a very simple NIB that only has a UIView in addition to the default First Responder and Owning Object, what is the simplest way to load the UIView into my code? I have not been able to get loadNibNamed:owner:options: to work at this point, but suspect the answer will involve it somehow.

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• CodeIgniter: Can't load database from within a model

  - by thedp

  Hello, I've written a new model for my CodeIgniter framework. I'm trying to load the database from within the constructor function, but I'm getting the following error: Severity: Notice Message: Undefined property: userdb::$load Filename: models/userdb.php Line Number: 7 Fatal error: Call to a member function database() on a non-object in /var/www/abc/system/application/models/userdb.php on line 7 Here is my model: <?php class userdb extends Model { function __construct() { $this->load->database(); } ?> What am I doing wrong here? Thank you.

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• Can't instantiate COM component in C# - error 80070002

  - by Judah Himango

  I'm attempting to instantiate a Windows Media Player COM object on my machine: Guid mediaPlayerClassId = new Guid("47ac3c2f-7033-4d47-ae81-9c94e566c4cc"); Type mediaPlayerType = Type.GetTypeFromCLSID(mediaPlayerClassId); Activator.CreateInstance(mediaPlayerType); // <-- this line throws When executing that last line, I get the following error: System.IO.FileNotFoundException was caught Message="Retrieving the COM class factory for component with CLSID {47AC3C2F-7033-4D47-AE81-9C94E566C4CC} failed due to the following error: 80070002." Source="mscorlib" StackTrace: at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandle& ctor, Boolean& bNeedSecurityCheck) at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean fillCache) at System.RuntimeType.CreateInstanceImpl(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean fillCache) at System.Activator.CreateInstance(Type type, Boolean nonPublic) at System.Activator.CreateInstance(Type type) at MyStuff.PreviewFile(String filePath) in F:\Trunk\PreviewHandlerHosting\PreviewHandlerHost.cs:line 60 InnerException: This same code works on other developer machines and end user machines. For some reason, it only fails on my machine. What could be the cause?

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• C#/.NET: WinForms - "KeyPress" event for textbox is missing?

  - by eibhrum

  Hi, I am trying to add an "KeyPress" event in a textbox (WinForm) this.textBox1.KeyPress += new System.Windows.Forms.KeyPressEventHandler(CheckKeys); and here's inside the 'CheckKeys': private void CheckKeys(object sender, System.Windows.Forms.KeyPressEventArgs e) { if (e.KeyChar == (char)13) { // Enter is pressed - do something } } The idea here is that once a textbox is in focus and the 'Enter' button was pressed, something will happen... However, my machine cannot find the 'KeyPress' event. Is there something wrong with my codes? I need a little help on this one. Thanks.

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• XML Serialization is not including milliseconds in datetime field from Rails model

  - by revgum

  By default, the datetime field from the database is being converted and stripping off the milliseconds: some_datetime = "2009-11-11T02:19:36Z" attribute_before_type_cast('some_datetime') = "2009-11-11 02:19:36.145" If I try to overrride the accessor for this attribute like; def some_datetime attribute_before_type_cast('some_datetime') end when I try "to_xml" for that model, I get the following error: NoMethodError (undefined method `xmlschema' for "2009-11-11 02:19:36.145":String): I have tried to parse the String to a Time object but can't get one to include the milliseconds; def some_datetime Time.parse(attribute_before_type_cast('some_datetime').sub(/\s/,"T").sub(/$/,"Z")) end Can anyone help get get a datetime with milliseconds rendered by to_xml?

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• System.UnauthorizedAccessException: Retrieving the COM class factory for component with CLSID {00020

  - by Tomas I

  Hello. I have a problem with a C# ASP .NET project in Visual Studio 2008 This problem started when I reinstalled my computer with Windows 7 ultimate 64-bit. To this I'm also using Office 2007. The error message I'm getting is: {System.UnauthorizedAccessException: Retrieving the COM class factory for component with CLSID {000209FF-0000-0000-C000-000000000046} failed due to the following error: 80070005. at xxx.Utility.WordDocument..ctor(String filePath, HttpServerUtility util) at customer_communication.BuCreate_click(Object sender, EventArgs e) in c:\xxx\Website\customer\communication.aspx.cs:line 127} If anyone can help me I would rely appreciate it.

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• any real MVC library in PHP (for GUI apps)

  - by mario

  I'm wondering if there are any abstraction frameworks for one of the PHP gui libraries. We have PHP-GTK, a PHP/Tk interface, and seemingly also PHP-QT. (Not tried any.) I know that writing against the raw Gtk+ interface in Python is just bearable, and it therefore seems not very enticing for PHP. I assume it's the same for Qt, and Tk is pretty low-level too. So I'm looking for something that provides a nicer object structure atop any of the three. Primarily TreeViews are always a chore and php-gtk callbacks are weird in PHP, so I'd like a simplification for that. If it eases adding the GUI/View atop my business logic without much control code, that might already help. And so since GUI apps are an area where MVC or MVP would actually make sense, I'd like to know if any library for that exists. Btw, recently rediscovered PHP interface preprocessor, but that's rather low-level and just provides a simple widget/interface abstraction for Gtk/ncurses/pdf/xhtml output.

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• How to set properties of a d:DesignInstance in XAML?

  - by Scott Bilas

  I'm using the new d:DesignInstance feature of the 4.0 series WPF tools. Works great! Only issue I'm having is: how can I set properties on the instance? Given something like this: <Grid d:DataContext="{d:DesignInstance plugin:SamplePendingChangesViewModel, IsDesignTimeCreatable=True}"/> How can I set properties on the viewmodel, aside from setting them in its default ctor or routing it through some other object initializer? I gave this a try but VS gives errors on compile "d:DataContext was not found": <Grid> <d:DataContext> <d:DesignInstance IsDesignTimeCreatable="True"> <plugin:SamplePendingChangesViewModel ActiveTagIndex="2"/> </d:DesignInstance> </d:DataContext> For the moment I'm going back to using a resource and 'd:DataContext={StaticResource SampleData}', where I can set the properties in the resource. Is there a way to do it via a d:DesignInstance?

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• Silverlight 4 WebRequest, SSL and Credentials

  - by Snake

  Hi, I've got the following code: public void StartDataRequest() { WebRequest.RegisterPrefix("https://", System.Net.Browser.WebRequestCreator.ClientHttp); WebClient myService = new WebClient { AllowReadStreamBuffering = true, UseDefaultCredentials = false, Credentials = new NetworkCredential("username", "password") }; myService.UseDefaultCredentials = false; myService.OpenReadCompleted += this.RequestCompleted; myService.OpenReadAsync(new Uri("Url")); } public void RequestCompleted(object sender, System.Net.OpenReadCompletedEventArgs e) { // ... } Now this works perfectly for, say, Twitter. But when I try to do it with another https service I get a security error. This is probably because the website I try to connect too does not have a crossdomain.xml. Is there a way to bypass this? Or does the file really needs to be there? Thanks.

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• Strategy to lazy load images for buttons within UIScrollView?

  - by greypoint

  I have a horizontal UIScrollView that contains UIButtons (though it could be any object). I would like to only download images for these buttons as the user scrolls and they are seen. I would also like an activityindicator running on each button while the images are downloading. Here's what I've tried with results: Check content offset of uiscrollview and download images for visible buttons. Problem: issues getting activity view shown within subclassed UIButton and not desired usability since images are only downloaded once scrolling stops. Add subviews (not buttons) to the UIScrollview hoping to use the view's ViewController to initiate a downloaded on viewDidAppear. Problem: viewDidAppear never seems to get called (because I am using addSubView?). I've seen other apps that do this kind of loading but need some guidance on the typical set-up. Ebay's app is a great example. All items have a default image until the item comes into view, then an activityindicator runs and the items unique image is downloaded. Thanks for assistance.

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• Does Powershell have an "eval" equivalent? Is there a better way to see a list of properties and val

  - by glenatron

  I'm doing a bit of Powershell scripting ( for the first time ) to look at some stuff in a Sharepoint site and what I would like to be able to do is to go through a list of properties of an object and just output their values in a "property-name = value" kind of format. Now I can find the list of elements using this: $myObject | get-member -membertype property Which will return a list of all the properties in a very clear and readable fashion. But what I need is to find a value for those properties. In some scripting languages I could have a kind of eval( "$myObject.$propertyName" ) call - where I have extracted $propertyName from the get-member output - and have it evaluate the string as code, which for the kind of quick-and-dirty solution I need would be fine. Does this exist in Powershell or is there a more convenient way to do it? Should I be using reflection instead?

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• Silverlight doesn't prompt to increase quota

  - by Sung Meister

  I am trying out Silverlight's Isolated Storage feature. Currently running Silverlight thru ASP.NET page. I have written some code to request an additional storage but I am not being prompted to add more. private void requestButton_Click(object sender, RoutedEventArgs e) { using (IsolatedStorageFile store = IsolatedStorageFile.GetUserStoreForApplication()) { if (store.AvailableFreeSpace >= 1000*1024) return; long usedSpace = store.Quota - store.AvailableFreeSpace; if (store.IncreaseQuotaTo(usedSpace + 1000*1024)) statusTextBlock.Text = string.Format("Quota has been increased to {0}", store.Quota); else statusTextBlock.Text = "You have denied quota increase... you Inglorious Basterd..."; } } Silverlight's Application Storage tab doeslist the localhost ASP.NET page hosting Silverlight as shown below. According to the screenshot, http://localhost:54389 has 1.0MB of available storage area. Is there a restriction set on localhost websites that a prompt is ignored? What are the required steps for Silverlight to prompt users to increase quota?

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• Netbeans autocomplete unusably slow/nonfunctional in Netbeans 6.8 Latest

  - by Stefan Kendall

  I'm running a 2.5Ghz C2D with 4GB RAM, so there's no reason hardwre-wise why Netbeans should be peforming so poorly. Using the latest Netbeans release and grails plugin (installed via the plugin manager), automcomplete is either too slow to use or doesn't work at all. If I'm within a class, and I attempt to auto-complete a field, it takes 3-4 seconds before being able to finish the field name. If I'm in a class of the same package (like a unit test), I can't get any of the properties to appear on the object. Furthermore, it says "Scanning in progress" for a full 5-6 seconds before pulling up the method list. Is there a way to fix this behavior?

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• Handle Union of List in C# with duplicates

  - by user320587

  Hi, I am trying to understand how to handle union or merge of two lists that can have duplicates. For example, List1 has { A, B, C} and List2 has { B, C, D }. I tried to use the Union operation and got a new list with values (A, B, C, D}. However, I need the B & C values from the second list, not first one. Is there a way to specify the union method, which duplicate value to use. The code I am using now is var newList = List1.Union<Object>(List2).ToList(); Thanks for any help. Javid

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• asp.net MVC DisplayTemplates and EditorTemplate naming convention

  - by Simon G

  Hi, I've got a couple of questions about the naming convention for the DisplayTemplates and EditorTemplates in MVC 2. If for example I have a customer object with a child list of account how do I: Create a display template for the list of accounts, what is the file called? When I'm doing a foreach( var c in Model.Accounts ) how do I call a display temple while in the foreach loop? When I do Html.DisplayFor( x => x ) inside the foreach x is the model and not in this case c. Thanks in advance.

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• Flex secret for session using Facebook API

  - by Mike

  In this video, it mentioned not to embed the Facebook secret key inside the application, http://www.adobe.com/devnet/facebook/articles/video_facebook_quick_start.html, so I passed null to this function facebookSession = new FacebookSessionUtil(MYAPI, null, stage.loaderInfo); but it didn't work. How can I hide my secret key? In the doc it mentioned: http://facebook-actionscript-api.googlecode.com/svn/release/current/docs/com/facebook/utils/FacebookSessionUtil.html secret:String — Your application's secret key. If this parameter is passed a value of null, the constructor looks for a special session secret stored in the fb_sig_ss property of the loaderInfo object. For web sessions, even if you pass a non-null value for this parameter, the constructor will always look for a session secret and use that instead of the value that you pass for this parameter.

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• Validating result of JsonConvert.DeserializeObject (think "try parse") using JSON.Net

  - by Riri

  I have incoming messages that I need to try and parse in my own objects structure. SOme of these are well formed JSON obejcts and some are just nonsense. I use JsonConvert.DeserializeObject<MyObject>(incmoingString); to do this. This however sometimes gives me a exception when the incoming is total garbage. Other times I get a non-complete object structure when the incoming string is kind of OK - and finally it sometimes work. I've wrapped the conversion in a try/catch and than manually validate that I've gotten the properties I need to the deserialized result. Is there a better way to do this?

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• access violation in wglMakeCurrent

  - by Stefan

  Sometimes in my OpenGL application I get an access violation in the following API call: wglMakeCurrent(NULL, NULL); The application only has one single thread, and I've checked that before that call, both the DC and HGLRC that are currently used are correct and valid. There are three different windows with OpenGL content, and they're all redrawn on WM_PAINT messages and if a refresh is required due to user interaction (e.g., picking an object). Also this access violation happens on different machines with different graphic cards, so I don't think it's a driver issue. What could make this API call crash? What should I investigate in the app code to find out where/why this happens? I'm really lost here since I've checked everything I could think of already. I hope someone can give me hints/ideas on what more to check.

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• Headers to set for AJAX calls in a custom webserver

  - by ErJab

  I'm writing a custom web server. When I enter the URL of my server in the browser, I get the sample text I write out to the socket in my browser correctly. This is the HTTP response that I write: HTTP/1.1 200 OK\r\n Server: My Server\r\n Date: Blah\r\n \r\n This is some sample text. This appears in my browser correctly when I connect directly to the server entering the URL. However, if I use Ajax (jQuery) to access the same URL and then set the innerHTML of an element on the HTML page, I do not get any data printed. Is there any other header I need to set on my web server so that the browser's XMLHttpRequest object detects the response?

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• device.uuid undefined in PhoneGap on Android?

  - by Steve Nay

  I'm writing a PhoneGap application that sends requests to a central database. It needs to be able to identify the unique devices that connect to it. PhoneGap's device.uuid property would seem to do the trick. On webOS and iPhone, I get back a unique string of alphanumeric characters, which will satisfy my need. However, the Android devices I've tested (Motorola Droid and the Android SDK emulator, both running Android 2.1) return "undefined" as the device.uuid. device.platform and device.name return correct values on all three platforms, so the problem doesn't have to do with the device object itself (it's defined in the code blocks where I use it). Is this an Android limitation? A problem with PhoneGap? Is there any other way to get such a globally unique identifier if not through device.uuid? EDIT: It appears that the deviceready event is never getting fired, which needs to happen before the device.uuid property becomes available.

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• Visual State Manager in WPF not working for me

  - by Román

  Hi In a wpf project I have this XAML code <Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" xmlns:ic="clr-namespace:Microsoft.Expression.Interactivity.Core;assembly=Microsoft.Expression.Interactions" x:Class="WpfApplication1.MainWindow" xmlns:vsm="clr-namespace:System.Windows;assembly=WPFToolkit" x:Name="Window" Title="MainWindow" Width="640" Height="480"> <vsm:VisualStateManager.VisualStateGroups> <vsm:VisualStateGroup x:Name="VisualStateGroup"> <vsm:VisualState x:Name="Loading"> <Storyboard> <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="control" Storyboard.TargetProperty="(UIElement.Visibility)"> <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="{x:Static Visibility.Visible}"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="button" Storyboard.TargetProperty="(UIElement.Visibility)"> <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="{x:Static Visibility.Collapsed}"/> </ObjectAnimationUsingKeyFrames> <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="button1" Storyboard.TargetProperty="(UIElement.Visibility)"> <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="{x:Static Visibility.Visible}"/> </ObjectAnimationUsingKeyFrames> </Storyboard> </vsm:VisualState> <VisualState x:Name="Normal"> <Storyboard> <ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="control" Storyboard.TargetProperty="(UIElement.Visibility)"> <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="{x:Static Visibility.Collapsed}"/> </ObjectAnimationUsingKeyFrames> </Storyboard> </VisualState> </vsm:VisualStateGroup> </vsm:VisualStateManager.VisualStateGroups> <Grid x:Name="LayoutRoot"> <Grid.Resources> <ControlTemplate x:Key="loadingAnimation"> <Image x:Name="content" Opacity="1"> <Image.Source> <DrawingImage> <DrawingImage.Drawing> <DrawingGroup> <GeometryDrawing Brush="Transparent"> <GeometryDrawing.Geometry> <RectangleGeometry Rect="0,0,1,1"/> </GeometryDrawing.Geometry> </GeometryDrawing> <DrawingGroup> <DrawingGroup.Transform> <RotateTransform x:Name="angle" Angle="0" CenterX="0.5" CenterY="0.5"/> </DrawingGroup.Transform> <GeometryDrawing Geometry="M0.9,0.5 A0.4,0.4,90,1,1,0.5,0.1"> <GeometryDrawing.Pen> <Pen Brush="Green" Thickness="0.1"/> </GeometryDrawing.Pen> </GeometryDrawing> <GeometryDrawing Brush="Green" Geometry="M0.5,0 L0.7,0.1 L0.5,0.2"/> </DrawingGroup> </DrawingGroup> </DrawingImage.Drawing> </DrawingImage> </Image.Source> </Image> <ControlTemplate.Triggers> <Trigger Property="Visibility" Value="Visible"> <Trigger.EnterActions> <BeginStoryboard x:Name="animation"> <Storyboard> <DoubleAnimation From="0" To="359" Duration="0:0:1.5" RepeatBehavior="Forever" Storyboard.TargetName="angle" Storyboard.TargetProperty="Angle"/> </Storyboard> </BeginStoryboard> </Trigger.EnterActions> <Trigger.ExitActions> <StopStoryboard BeginStoryboardName="animation"/> </Trigger.ExitActions> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Grid.Resources> <Grid.ColumnDefinitions> <ColumnDefinition MinWidth="76.128" Width="Auto"/> <ColumnDefinition MinWidth="547.872" Width="Auto"/> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition Height="0.05*"/> <RowDefinition Height="0.95*"/> </Grid.RowDefinitions> <Button x:Name="button" Margin="0,0,1,0.04" Width="100" Content="Load" d:LayoutOverrides="Height" Click="Button_Click"/> <Button x:Name="button1" HorizontalAlignment="Left" Margin="0,0,0,0.04" Width="100" Content="Stop" Grid.Column="1" d:LayoutOverrides="Height" Click="Button2_Click" Visibility="Collapsed"/> <Control x:Name="control" Margin="10" Height="100" Grid.Row="1" Grid.ColumnSpan="2" Width="100" Template="{DynamicResource loadingAnimation}" Visibility="Collapsed"/> </Grid> </Window> and the following code behind on the window public partial class MainWindow : Window { public MainWindow() { this.InitializeComponent(); } private void Button1_Click(object sender, System.Windows.RoutedEventArgs e) { VisualStateManager.GoToState(this, "Loading", true); } private void Button2_Click(object sender, System.Windows.RoutedEventArgs e) { VisualStateManager.GoToState(this, "Normal", true); } } However, when I click the first button (button1) the state change is not being triggered. What am I doing wrong? Thanks in advance

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• Method 'SingleOrDefault' not supported by Linq to Entities

  - by user300992

  I read other posts on similar problem on using SingleOfDefault on Linq-To-Entity, some suggested using "First()" and some others suggested using "Extension" method to implement the Single(). This code throws exception: Movie movie = (from a in movies where a.MovieID == '12345' select a).SingleOrDefault(); If I convert the object query to a List using .ToList(), "SingleOrDefault()" actually works perfectly without throwing any error. My question is: Is it not good to convert to List? Is it going to be performance issue for more complicated queries? What does it get translated in SQL? Movie movie = (from a in movies.ToList() where a.MovieID == '12345' select a).SingleOrDefault();

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• TestContext is null

  - by Budda

  Pretty simple test: [TestClass] public class MyTestClass { private TestContext _testContext; protected TestContext TestContext { get { return _testContext; } set { _testContext = value; } } [TestMethod] [HostType("ASP.NET")] [UrlToTest("http://localhost/MyPage.aspx")] public void TestMyPage() { Assert.IsNotNull(TestContext); } } Fails... Now I am using VS2008 Development edition. Is there any possibility to fix this? Or I need to have a Test (or Team Suite) edition? Thanks. P.S. Access to TestContext object is required to have access to it's RequestedPage property

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• iText - Modifying PDFWriter# Verticle Alignment manually

  - by simon622

  Ive hit upon a problem using iText (java), despite hours of looking thru the docs.. Most of the code I use goes via the Document# API which tracks (via the PDFWriter instance) the current Y position. HOWEVER, we need to use the PdfContentByte part of the API to insert some Java2d into the document, but in doing so this appears to bypass the logic which tracks verticle writes. So next time I use the Document API, it overwrites the contents of the manually inserted things. I want to mimick the behaviour of the Document# API by manually moving the cursor on N number of units (N being the height of the element inserted by the PDFContentByte API), such that when I then use the Document object again, bingo, its cursor is in the correct location. I can see that a method to obtain the cursor exists; PdfWriter#getVerticalPosition(boolean); But not one to set it?! Any ideas anyone? Thanks.

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