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  • Canceling BackgroundWorker within the Thread

    - by Mike Wills
    I have a longer running multi-step process using BackgroundWorker and C#. I need to be sure that each step is completed successfully before moving on to the next step. I have seen many references to letting the BackgroundWorker catch errors and canceling from clicking on a Cancel button, but I want to check for an error myself and then gracefully end the process. Do I treat it just like someone clicked the cancel button, or is there another way?

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  • partial entity loading and management in silverlight / wcf ria

    - by Dan Wray
    I have a Silverlight 4 app which pulls entities down from a database using WCF RIA services. These data objects are fairly simple, just a few fields but one of those fields contains binary data of an arbitrarily size. The application needs access to this data basically asap after a user has logged in, to display in a list, enable selection etc. My problem is because of the size of this data, the load times are not acceptable and can approach the default timeout of the RIA service. I'd like to somehow partially load the objects into my local data context so that I have the IDs, names etc but not the binary data. I could then at a later point (ie when it's actually needed) populate the binary fields of those objects I need to display. Any suggestions on how to accomplish this would be welcome. Another approach which has occurred to me whilst writing this question (how often does that happen?!) is that I could move the binary data into a seperate database table joined to the original record 1:1 which would allow me to make use of RIA's lazy loading on that binary data. again.. comments welcome! Thanks.

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  • Button Visibility Converter

    - by developer
    Hi All, I have a requirement wherein I need to display on a User form, a Create Button if that user has doesnt have a profile and a Edit Button if he does have a profile. I am using a converter to change the visibility of the button. Below is my code, <StackPanel Orientation="Horizontal"> <Button Content="Create Profile" Visibility="{Binding Profile,Converter={StaticResource ButtonVisibilityConverter}, ConverterParameter='Create'}" Command="local:LaunchEditor" CommandParameter="{Binding}"/> <Button Content="Edit Profile" Visibility="{Binding Profile,Converter={StaticResource ButtonVisibilityConverter}, ConverterParameter='Edit'}" Command="local:LaunchEditor" CommandParameter="{Binding}"/> </StackPanel> Below is my converter code public class ButtonVisibilityConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { string btName = null; btName = (string)parameter; if ((value==null)&&(btName=="Create")) { return Visibility.Visible; } else if ((value != null) && (btName=="Edit")) { return Visibility.Visible; } else { return Visibility.Collapsed; } } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { throw new NotImplementedException(); } } Everything works fine initially, but the moment I click on the Create Profile window, and it is the constructor that loads the profile window, after that even if I close that window without doing anything, the Create button turns to edit. My guess is that, it is because the constructor would have create the profile object and so even though the object is empty it shows me edit button instead of create. Is there any other way I could display button visibility??

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  • Visual Studio 2010, using VB.NET. Intellisense does not recognize new property until I recompile

    - by Velika
    I have an ASP.NET VB.NET web project that references a VB.NET class library. I add a new property to a class in the class library, then, from the web app, I expect to be able to use it immediately w/o errors and with full intellisense. It used to work in 2008. When I compile the class library, it becomes available but not until. Was this nice feature taken away, perhaps in the interest of speed?

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  • Can't compile code when working with CALayer

    - by Sheehan Alam
    For some reason I get linker errors when I try and use CALayer: "_OBJC_CLASS_$_CALayer", referenced from: I have imported the following headers: #import <Foundation/Foundation.h> #import <UIKit/UIKit.h> #import <QuartzCore/QuartzCore.h> Code: arrowImage = [[CALayer alloc] init];

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  • jquery cycle plugin divs always stacked problem

    - by user315430
    hi! i want to put three jquery slideshows in a div. somehow, without any css positioning the slides wont display below each other, but stacked. how can i get the sildes to display below each other, just as normal divs would? <div id="slidecontainer" style="background-color: red;"> <div id="q1"> <img src="merkel01.jpg"/> <img src="merkel02.jpg"/> <img src="merkel03.jpg"/> <img src="merkel04.jpg"/> <img src="merkel05.jpg"/> </div> <div id="q2"> <img src="poyan01.jpg"/> <img src="poyan02.jpg"/> <img src="poyan03.jpg"/> <img src="poyan04.jpg"/> <img src="poyan05.jpg"/> <img src="poyan06.jpg"/> </div> <div id="q3"> <img src="mirage01.jpg"/> <img src="mirage02.jpg"/> <img src="mirage03.jpg"/> <img src="mirage04.jpg"/> <img src="mirage05.jpg"/> </div> <div>TEST</div> <div>TEST222</div> <div>TEST333</div> </div> also, if i add additional test-divs they will also be placed under the three stacked slides... any help vermy much appreciated!! fusi

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  • How install gems locally?

    - by metdos
    I have no internet connection on server machine, so I need to install gems locally. I tried gem install rails-2.3.4.gem But, I'm getting errors. How Can I install gems locally. Thanks.

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  • not getting a page reload when submitting a form on a page

    - by Bob Walsh
    When showing a project, the user can add a decision via a form_for and its partial. Is there some way of avoiding reloading the page and just creating the record silently? In the controller method (adddecision) I have: respond_to do |format| if @decision.save format.html { redirect_to(@project) } format.xml { head :ok } else format.html { render :action => "show" } format.xml { render :xml => decision.errors, :status => :unprocessable_entity } end I've tried redirect_to(:back) etc - still getting a page reload.

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  • Vertically center a fluid image in a fluid container

    - by Ferdy
    I certainly do not want to add to the pile of vertical alignments CSS questions, but I've spent hours trying to find a solution to no avail yet. Here's the situation: I am building a slideshow gallery of images. I want the images to be displayed as large as the user's window allows. So I have this outer placeholder: <section class="photo full"> (Yes, I'm using HTML5 elements). Which has the following CSS: section.photo.full { display:inline-block; width:100%; height:100%; position:absolute; overflow:hidden; text-align:center; } Next, the image is placed inside it. Depending on the orientation of the image, I set either the width or height to 75%, and the other axis to auto: $wide = $bigimage['width'] >= $bigimage['height'] ? true: false; ?> <img src="<?= $bigimage['url'] ?>" width="<?= $wide? "75%" : "auto"?>" height="<?= $wide? "auto" : "75%"?>"/> So, we have a fluid outer container, with inside a fluid image. The horizontal centering of the image works, yet I cannot seem to find a way to vertically center the image within it's container. I have researched centering methods but most assume either the container or image has a known width or height. Then there is the display:table-cell method, which does not seem to work for me either. I'm stuck. I'm looking for a CSS solution, but am open to js solutions too.

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  • To get which function threw exception in javascript

    - by uzay95
    I am trying to create a Exception class to get and send errors from client to server. I want to catch exception in javascript function and push the details to the web service to write to database. But i couldn't get how to get which function/line throwed this exception. Is there any way to solve this?

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  • Unhandled Exception in c#

    - by nightcoder1
    Hello i am currently trying to run a web crawler through the terminal. it compiles fine and the debug does not find any errors, however i get the following error which i do not understand. any ideas on how to get rid of this error would be much appreciated Unhandled Exception: System.ArgumentOutOfRangeException: startIndex + length > this.length Parameter name: length at System.String.Substring (Int32 startIndex, Int32 length) [0x00000] at OpenWebSpiderCS.mysql.executeSQLQuery (System.String SQL) [0x00000] at OpenWebSpiderCS.db.startIndexThisSite (OpenWebSpiderCS.page p) [0x00000] at OpenWebSpiderCS.ows.startCrawling () [0x00000] at OpenWebSpiderCS.mainClass.Main (System.String[] args) [0x00000] thank you

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  • How to show percentage of 'memory used' in a win32 process?

    - by pj4533
    I know that memory usage is a very complex issue on Windows. I am trying to write a UI control for a large application that shows a 'percentage of memory used' number, in order to give the user an indication that it may be time to clear up some memory, or more likely restart the application. One implementation used ullAvailVirtual from MEMORYSTATUSEX as a base, then used HeapWalk() to walk the process heap looking for additional free memory. The HeapWalk() step was needed because we noticed that after a while of running the memory allocated and freed by the heap was never returned and reported by the ullAvailVirtual number. After hours of intensive working, the ullAvailVirtual number no longer would accurately report the amount of memory available. However, this method proved not ideal, due to occasional odd errors that HeapWalk() would return, even when the process heap was not corrupted. Further, since this is a UI control, the heap walking code was executing every 5-10 seconds. I tried contacting Microsoft about why HeapWalk() was failing, escalated a case via MSDN, but never got an answer other than "you probably shouldn't do that". So, as a second implementation, I used PagefileUsage from PROCESS_MEMORY_COUNTERS as a base. Then I used VirtualQueryEx to walk the virtual address space adding up all regions that weren't MEM_FREE and returned a value for GetMappedFileNameA(). My thinking was that the PageFileUsage was essentially 'private bytes' so if I added to that value the total size of the DLLs my process was using, it would be a good approximation of the amount of memory my process was using. This second method seems to (sorta) work, at least it doesn't cause crashes like the heap walker method. However, when both methods are enabled, the values are not the same. So one of the methods is wrong. So, StackOverflow world...how would you implement this? which method is more promising, or do you have a third, better method? should I go back to the original method, and further debug the odd errors? should I stay away from walking the heap every 5-10 seconds? Keep in mind the whole point is to indicate to the user that it is getting 'dangerous', and they should either free up memory or restart the application. Perhaps a 'percentage used' isn't the best solution to this problem? What is? Another idea I had was a color based system (red, yellow, green, which I could base on more factors than just a single number)

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  • MIN() and MAX() in Swift and converting Int to CGFloat

    - by gotnull
    I'm getting some errors with the following methods: 1) How do I return screenHeight / cellCount as a CGFLoat for the first method? 2) How do I use the equivalent of ObjC's MIN() and MAX() in the second method? func tableView(tableView: UITableView!, heightForRowAtIndexPath indexPath: NSIndexPath!) -> CGFloat { var cellCount = Int(self.tableView.numberOfRowsInSection(indexPath.section)) return screenHeight / cellCount as CGFloat } // #pragma mark - UIScrollViewDelegate func scrollViewDidScroll(scrollView: UIScrollView) { let height = CGFloat(scrollView.bounds.size.height) let position = CGFloat(MAX(scrollView.contentOffset.y, 0.0)) let percent = CGFloat(MIN(position / height, 1.0)) blurredImageView.alpha = percent }

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  • I have got this error : Failed to create InitialContext using factory specified in hashtable

    - by user85121
    I just want to add a servlet in web.xml, like this : <servlet> <display-name>AxisJMSServlet</display-name> <servlet-name>JMSListener</servlet-name> <servlet-class>com.sinosoft.prpall.web.jms.JMSListenServlet</servlet-class> <load-on-startup>110</load-on-startup> </servlet> Everything is just fine, and when i started my programs, I got this : javax.naming.NoInitialContextException: Failed to create InitialContext using factory specified in hashtable [Root exception is java.lang.NullPointerException] at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:258) at javax.naming.InitialContext.initializeDefaultInitCtx(InitialContext.java:318) at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:348) at javax.naming.InitialContext.internalInit(InitialContext.java:286) at javax.naming.InitialContext.<init>(InitialContext.java:211) at org.apache.axis.components.jms.JNDIVendorAdapter.getConnectionFactory(JNDIVendorAdapter.java:85) at org.apache.axis.components.jms.JNDIVendorAdapter.getQueueConnectionFactory(JNDIVendorAdapter.java:55) at org.apache.axis.transport.jms.JMSConnectorFactory.createConnector(JMSConnectorFactory.java:227) at org.apache.axis.transport.jms.JMSConnectorFactory.createServerConnector(JMSConnectorFactory.java:156) at com.sinosoft.prpall.web.jms.JMSListenServlet.init(JMSListenServlet.java:60) at javax.servlet.GenericServlet.init(GenericServlet.java:241) at weblogic.servlet.internal.StubSecurityHelper$ServletInitAction.run(StubSecurityHelper.java:283) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120) at weblogic.servlet.internal.StubSecurityHelper.createServlet(StubSecurityHelper.java:64) at weblogic.servlet.internal.StubLifecycleHelper.createOneInstance(StubLifecycleHelper.java:58) at weblogic.servlet.internal.StubLifecycleHelper.<init>(StubLifecycleHelper.java:48) at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:539) at weblogic.servlet.internal.WebAppServletContext.preloadServlet(WebAppServletContext.java:1981) at weblogic.servlet.internal.WebAppServletContext.loadServletsOnStartup(WebAppServletContext.java:1955) at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:1874) Can anybody tell me what is going on ?

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  • jQuery Find element else do nothing ?

    - by Andrew
    Hi Guys, I am trying to use jQuery to basically wrap a bunch of CSS modifications via jQuery but on pages where the #IDs or Classes dont exist I get errors ? Like jQuery(".class").css(random_stuff) is not a function Any ideas what I can do to either "find" the elements and do nothing or ?

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  • SyntaxError: Parse Error only happens in safari

    - by Josh Crowder
    Im getting SyntaxError: Parse Error, only on safari. Here is the code in question. <script type="text/javascript"> // I am using transloadit a jquery plugin. which works on every other page and is loading fine on safari by the looks of it. The errors is on line 44 which is export: { Can anyone see anything wrong with that page?

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  • Unknown Curl error

    - by Kaido
    Hey i got small problem getting an unknown curl error from my script "curl_error(): 180 is not a valid cURL handle resource". Im not able to find any recourses about that error so maybe anyone has any experience with this. Thanks already. heres the part which causes the error $resp = curl_error($ch); error_log(date('Y M D h:s:m '). ": $current error: " .curl_error($ch)."\n", 3, '../../usererrors/'.$username.'errors');

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  • Delphi Component Serialization

    - by Peter
    Has anyone run into issues serializing components into a file and reading them back, specifically in the area where the component vendor upgrades the VCL components. For example a file serialized with DelphiX and then years later read back with delphiY. Do the serialization formats change and if so what can be done to prevent errors reading in the componets when upgrading.

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  • How do I add a comment to an image using jQuery

    - by marcamillion
    So I am trying to replicate Facebook's picture tagging functionality, and I have the functionality that onClick, a box is created and there is a comment box. Now the issue is that I want to be able to (without doing any back-end processing) take the input from the input field and add it in some form to the underlying image area that they have selected. I would also like to add a small image to that area, that shows that a comment is there. How do I do that? See the code below for what I have for the comment box: <script type="text/javascript"> $(function() { var tag_box = $("<div>").appendTo("body").css({ "width": "40px", "height":"40px", "border":"4px solid #000000", "position":"absolute", "display":"none", "padding":"15px" }); var comment_box = $("<form action='#'><input id='comment' type='text' name='comment' placeholder='Add comment'></form>").appendTo(tag_box).css({"position":"absolute"}); $("#image-wrapper").live('click', function(e){ tag_box.css({ "left": e.pageX - 40, "top": e.pageY - 40, "display": "block" }) .after(comment_box.css({ "left": e.pageX - 65, "top": e.pageY + 40 })); }); }); </script> Now...whenever the user presses enter, the info in the comment box is appended to the URL like so: .html?comment=comment value# Thanks

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  • How to customize HeaderTemplate of ValidationSummary Silverlight control?

    - by BravcM
    Hello, I'd like to customize HeaderTemplate of ValidationSummary control from Silverlight Toolkit and display localized Header. But I cant figure out how to display error counter right to header's text ... Can anybody help me with this? My current XAML code ... <sdk:ValidationSummary Grid.Row="3"> <sdk:ValidationSummary.HeaderTemplate> <DataTemplate> <Grid Background="Red"> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto" /> <ColumnDefinition Width="Auto" /> </Grid.ColumnDefinitions> <TextBlock UseLayoutRounding="False" Foreground="White" Text="Editing Errors:" /> <TextBlock UseLayoutRounding="True" Foreground="White" FontWeight="Bold" Text="{Binding DisplayedErrors.Count}" Grid.Column="1" /> </Grid> </DataTemplate> </sdk:ValidationSummary.HeaderTemplate> Thanks in advance!

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  • Installation of Jetty into Eclipse

    - by Claus Jørgensen
    Hi I've had Jetty recommended as a good container for fast and simple development, in my case, Java Server Faces. I wish to use it with my Eclipse IDE (Version: 3.4.1), but quite frankly, can't figure out how. I've tried various outdated plugins, only with large amounts of errors in return, so I'm hoping someone could guide me from downloading the right version to installing it, and being able to press "RUN", and see a simple Hello World in JSP/JSF work. Cheers.

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  • UIViewController parentViewController access properties

    - by Dave
    I know this question has been asked several times and I did read existing posts on this topic but I still need help. I have 2 UIViewControllers - Parent and Child. I display the child view using the presentModalViewController as below: ChildController *child = [[ChildController alloc[ initWithNibName:@"ChildView" bundle:nil]; [self presentModalViewController:child animated:YES]; [child release]; The child view has a UIPickerView. When user selects an item from UIPickerView and clicks done, I have to dismiss the modal view and display the selected item on a text field in the parent view. In child's button click delegate, I do the following: ParentController *parent = (ParentController *)[self.navigationController parentViewController]; [parent.myTextField setText:selectedText]; [self dismissModalViewControllerAnimated:YES]; Everything works without errors. But I don't know how to load the Parent View so that it displays the updated text field. I tried [parent reloadInputViews]; doesn' work. Please help.

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