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  • Cross Thread Exception in PropertyChangedEvent in WPF

    - by Ashish Ashu
    I have a ListView that is binded to my custom collection. At run time , I am updating the certain properties of my entity in my custom collection in my ViewModel. At the same time , I am also doing the custom sorting in the listview. The custom sorting is applicable when I click on the any column header of the listview. For example, I am updating the current datetime on my entity on every 5 seconds and simulaneously , I am applying custom sorting based on DateTime. (The Listview is third party control). Hence I am doing two operations on my custom collection at the same time. Should I pass the dispatcher of my control in the view model and call any methods ( which updates any entity in my custom collection ) through UI dispatcher ?

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  • Can a CouchDB document update handler get an update conflict?

    - by jhs
    How likely is a revision conflict when using an update handler? Should I concern myself with conflict-handling code when writing a robust update function? As described in Document Update Handlers, CouchDB 0.10 and later allows on-demand server-side document modification. Update handlers can process non-JSON formats; but the other major features are these: An HTTP front-end to arbitrarily complex document modification code Similar code needn't be written for all possible clients—a DRY architecture Execution is faster and less likely to hit a revision conflict I am unclear about the third point. Executing locally, the update handler will run much faster and with lower latency. But in situations with high contention, that does not guarantee a successful update. Or does the update handler guarantee a successful update?

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  • Parse M3U file locations to fully qualified paths

    - by Guy
    I would like to parse the file location information in an M3U playlist into fully qualified paths. The possible formats in M3U files seem to be: c:\mydir\songs\tune.mp3 \songs\tune.mp3 ..\songs\tune.mp3 For the first example, just leave it alone. For the second add the directory that the playlist resides in so it would become c:\playlists\songs\tune.mp3 and the same for the third case so it would also become: c:\playlists\songs\tune.mp3. I'm using vb under VS2008 and I can't find a way to recognise each of the potential location formats in the M3U file. System.IO.Path offers no solution that I can find. I've searched extensively for terms like "convert relative path to absolute" but no luck. Any advice appreciated. Thanks.

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  • Performance analysis strategies

    - by Bernd
    I am assigned to a performance-tuning-debugging-troubleshooting task. Scenario: a multi-application environment running on several networked machines using databases. OS is Unix, DB is Oracle. Business logic is implemented across applications using synchronous/asynchronous communication. Applications are multi-user with several hundred call center users at peak time. User interfaces are web-based. Applications are third party, I can get access to developers and source code. I only have the production system and a functional test environment, no load test environment. Problem: bad performance! I need fast results. Management is going crazy. I got symptom examples like these: user interface actions taking minutes to complete. Seaching for a customer usually takes 6 seconds but an immediate subsequent search with same parameters may take 6 minutes. What would be your strategy for finding root causes?

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  • How to get a clipboard paste notification and provide my own data?

    - by Uwe Keim
    For a small utility I am writing (.NET, C#), I want to monitor clipboard copy operations and clipboard paste operations. My idea is to provide my own data when pasting into an arbitrary application. The monitoring of a copy operation can be easily done by using a clipboard viewer. Something that seems much more advanced to me is to write a "clipboard paste provider": Answer to "what formats are available" queries of applications. Supply data to application paste operations. I found this posting and this posting, but none of them seems to really help me. What I guess is that I somehow have to mimic/hijack the current clipboard. Question: Is it possible to "wrap" the clipboard in terms of paste operations and provide my own kind of "clipboard proxy"? Thanks Uwe

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  • VBA Word 2003 Dialog box

    - by user171476
    Hi, Our client enironment recently migrated from word 2000 to 2003, we use the below code in one of the templates to show the word's default insert file dialog box. Word is integrated with another third party application Hummingbird docspen. With Dialogs(wdDialogInsertFile) .Name = "q:*.*" .Show End With In old environment it opens up the default insertfile dialog box pointing to my documents folder, where as in word 2003, it opens up the Docsopen insertfile dialog box. I have compared the settings of word 2000 and 2003 it seems to be same. Any suggestions on this please.

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  • Running a GWT application inside an IFRAME from an ASP.NET 3.5 app?

    - by Jay Stevens
    We are looking at integrating a full-blown GWT (Google Web Toolkit 2.0) application with an existing ASP.NET 3.5 application. My first gut reaction is that this is a horrible frankenstein idea. However, the customer has insisted that we use this application developed by a third-party. I have almost NO CONTROL over the development of the GWT app. My first thought is to actually attempt to embed this in an iFrame. Because GWT is running under Tomcat/Jakarta, it is hosted on a different server from the .NET app so the iFrame src will be to a URL on the other machine. I need to utilize our own ASP.NET authorization scheme to restrict access to the embedded GWT application. The GWT app also uses embedded java applets, which don't seem to be working right now inside the iframe. Any major problems with this approach that anyone can see? Will GWT work on an iframe while hosted on a different machine?

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  • Delphi: Moving away from VSS

    - by Mohammed Nasman
    We are team of few Delphi developers who have been using VSS since years (I know it's a pity), but we don't use any of the advanced features of VCS, so it was working fine in many cases (but some times it was driving me crazy :( ). The good thing that we have with VSS that we use third-party plug-ings to integrate VSS with Delphi, which is working great, but now when our projects becomes larger, and we would like to move a way from VSS. I have looked at few other VCS (free and commercial) and found most of them seems be made for Linux guys, and you have to use command line for many admin work(I know I'm windows guy :P). What I'm looking for the new Version control that it should be easy to use and to maintain and Integrated nicely with Delphi IDE (D2007), or at least have a good UI for the Admins an developers.

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  • Recording user data for heatmap with javascript

    - by Hanpan
    Hi, I was wondering how sites such as crazyegg.com store user click data during a session. Obviously there is some underlying script which is storing each clicks data, but how is that data then populated into a database? It seems to me the simple solution would be to send data via AJAX but when you consider that it's almost impossible to get a cross browser page unload function setup, I'm wondering if there is perhaps some other more advanced way of getting metric data. I even saw a site which records each mouse movement and I am guessing they are definitely not sending that data to a database on each mouse move event. So, in a nutshell, what kind of technology would I need in order to monitor user activity on my site and then store this information in order to create metric data? I am not looking to recreate GA, I'm just very interested to know how this sort of thing is done. Thanks in advance

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  • How can I learn a multitouch screen's communication protocol and write a C# application for it?

    - by puri
    I have got a monitor with multitouch overlay on top of it. It works fine with Windows 7 but I want to write a multitouch application in C# for Windows XP which doesn't support touch feature out of the box. There is no documentation whatsoever and I emailed the manufacturer but never got a reply. However the device works with Google Earth, which doesn't natively support multitouch, on Windows XP. So I think it generates many types of messages together i.e. WM_TOUCH for Windows 7, one for Google Earth COM API, and probably its own messages either in UDP or Windows message form. How can I trap all communications and learn the protocol?

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  • implicit argument passing of super from method defined by define_method() is not supported. Specify

    - by jaycode
    Most of you should already know Pragmatic book's "Agile web dev with rails" (third edition). On page 537 - 541 it has "Custom Form Builders" code as follows: class TaggedBuilder < ActionView::Helpers::FormBuilder # <p> # <label for="product_description">Description</label><br/> # <%= form.text_area 'description' %> #</p> def self.create_tagged_field(method_name) define_method(method_name) do |label, *args| @template.content_tag("p" , @template.content_tag("label" , label.to_s.humanize, :for => "#{@object_name}_#{label}") + "<br/>" + super) end end field_helpers.each do |name| create_tagged_field(name) end end This code doesn't work with Ruby 1.9.1. It returns error as follows: implicit argument passing of super from method defined by define_method() is not supported. Specify all arguments explicitly. (ActionView::TemplateError) My question is: What should I change in the code to fix this? Thank you

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  • Install Bash completion together with distutils / pip

    - by ifischer
    I have created a simple Python module and want to distribute it with pip. I also want to install a Bash completion file together with the module. I'm installing the module with Python 2.7.1+ and pip 0.8.2. I have this setup.py: setup( name='jenkinsmon', version='0.0.1', description='Jenkins Job Monitor', long_description=open('README.txt').read(), scripts=['bin/jenkinsmon'], data_files=[ ('/etc/bash_completion.d', ['extras/jenkinsmon.completion']), ], install_requires = [ 'autojenkins', 'argparse' ], ) Now if I try to install the package with pip install -e ., the Bash completion file never gets installed together with the package. I also tried workarounds by specifying a MANIFEST.in, like described here: MANIFEST.in: include extras/jenkinsmon.completion But this also doesn't help - the completion files won't get installed. What can I do to install the Bash completion files?

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  • Can I use ruby rest-client to POST a binary file to an http API?

    - by Angela
    I have been using rest-client in ruby in post XML to a third-party API. I need to be able to include a binary image that's uploaded. How do I do that? Uploading Attachments Both letters and postcards will, in most cases, require the attachment of documents. Those attachments might be PDFs in the case of letters or images in the case of postcards. To uploading an attachment, submit a POST to: http://www.postful.com/service/upload Be sure to include the Content-Type and Content-Length headers and the attachment itself as the body of the request. POST /upload HTTP/1.0 Content-Type: application/octet-stream Content-Length: 301456 ... file content here ... If the upload is successful, you will receive a response like the following: 290797321.waltershandy.2

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  • Authlogic Facebook Connect and cucumber

    - by jspooner
    I added the authlogic_facebook_connect plugin to my project and I'm now having problem running my cucumber test because of a NoMethodError. undefined method `set_facebook_session' for nil:NilClass (NoMethodError) In authlogic_facebook_connect/Session.rb the method "authenticating_with_facebook_connect?" is called as some sort of callback and the controller is defined but is missing the 'set_facebook_session' method. def authenticating_with_facebook_connect? controller.set_facebook_session attempted_record.nil? && errors.empty? && controller.facebook_session end I don't understand why the cucumber test is not loading the controller with this method. I also test the app in development and cucumber environments and everything works perfect. Here is the full cucumber output. Feature: Authentication In order to keep security a user should only be able to edit their own profile Background: # features/authorization.feature:4 Given a valid user record for joe_runner # features/step_definitions/user_steps.rb:4 undefined method `set_facebook_session' for nil:NilClass (NoMethodError) ./vendor/plugins/authlogic/lib/authlogic/controller_adapters/abstract_adapter.rb:63:in `send' ./vendor/plugins/authlogic/lib/authlogic/controller_adapters/abstract_adapter.rb:63:in `method_missing' ./vendor/plugins/authlogic_facebook_connect/lib/authlogic_facebook_connect/session.rb:132:in `authenticating_with_facebook_connect?' ./vendor/plugins/authlogic/lib/authlogic/session/callbacks.rb:83:in `validate' ./vendor/plugins/authlogic/lib/authlogic/session/validation.rb:64:in `valid?' ./vendor/plugins/authlogic/lib/authlogic/session/existence.rb:65:in `save' ./vendor/plugins/authlogic/lib/authlogic/session/existence.rb:30:in `create' ./vendor/plugins/authlogic/lib/authlogic/acts_as_authentic/session_maintenance.rb:113:in `create_session' ./vendor/plugins/authlogic/lib/authlogic/acts_as_authentic/session_maintenance.rb:103:in `maintain_sessions' ./features/step_definitions/user_steps.rb:5:in `/^a valid user record for ([\w]*)$/' features/authorization.feature:5:in `Given a valid user record for joe_runner' Scenario: Jonathan can edit his profile but not other users profiles # features/authorization.feature:7 Given jonathan is logged in as an user # features/step_definitions/user_steps.rb:13 When I go to my user edit page # features/step_definitions/web_steps.rb:18 And I press "Update" # features/step_definitions/web_steps.rb:22 Then I should see "Account updated!" # features/step_definitions/web_steps.rb:142 When I go to joe_runner's user edit page # features/step_definitions/web_steps.rb:18 Then I should see "You do not allowed to access to view that page" # features/step_definitions/web_steps.rb:142 Failing Scenarios: cucumber features/authentication.feature:9 # Scenario: Signup cucumber features/authorization.feature:7 # Scenario: Jonathan can edit his profile but not other users profiles 2 scenarios (2 failed) 15 steps (2 failed, 13 skipped) 0m0.173s rake aborted! Command failed with status (1): [/System/Library/Frameworks/Ruby.framework/...] /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:995:in `sh' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:1010:in `call' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:1010:in `sh' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:1094:in `sh' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:1029:in `ruby' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:1094:in `ruby' /Library/Ruby/Gems/1.8/gems/cucumber-0.6.4/lib/cucumber/rake/task.rb:68:in `run' /Library/Ruby/Gems/1.8/gems/cucumber-0.6.4/lib/cucumber/rake/task.rb:138:in `define_task' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `call' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `execute' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `each' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `execute' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in `invoke_with_call_chain' /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:607:in `invoke_prerequisites' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `each' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `invoke_prerequisites' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:596:in `invoke_with_call_chain' /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:583:in `invoke' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:2051:in `invoke_task' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `each' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:2023:in `top_level' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:2001:in `run' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in `run' /Library/Ruby/Gems/1.8/gems/rake-0.8.7/bin/rake:31 /usr/bin/rake:19:in `load' /usr/bin/rake:19 activespoon:base_project jspooner$ There are a couple of blogs that give examples on how to test facebook apps with cucumber but they didn't help because my error comes before these. http://opensoul.org/2009/3/6/testing-facebook-with-cucumber http://ryanbigg.com/2010/03/testing-facebook/

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  • Gridview with row headers

    - by Seagull
    I am using the ASP.NET3.5 gridview control in a new project. My problem is that the gridview presents data in basic tabular format, whereas I want a grid with row header / grouping behaviors. An example of this would be Outlook web interface, which can group emails by date, as well as allowing you to select individual emails to display. My problem: I can't see how this could be easily done with Gridview? I did find a product called Telerik that has a seemingly fancy Gridview, but I am hesitant to spend money on a single components that now also locks me into a third-party framework...

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  • Capture ASP output for monitoring

    - by scourge.zero
    How do I Capture ASP.NET output and then store it as temp memory so that I can use them in an application to do comparison. example. there's this site which has ASP output. Sorry I do not have server access, what I can do is view the output. The site by the way is a monitor for all users logged in and in which ever channel. output e.g. Channel 1 Username logged in (0 / 1) Username 1 1 John Smith 1 George B 0 Channel 2 Username logged in (0 / 1) Username 1 1 John Smith 0 George B 0 what I wanted to do is to capture this output and then show them this way. Username Channel 1 Channel 2 Total Username 1 1 1 2 John Smith 1 0 1 George B 0 0 0 I dont knw where to start.

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  • What every web developer should know?

    - by arikfr
    Let's say you got a new intern, who's a third-year CS student. He has firm knowledge of the basics, has some experience with C/Java from the courses he took and a lot of desire to learn more. What would you teach him in order to become a good web developer? What I had in mind is: HTML/CSS and the importance of writing semantic markup Javascript, some JS framework (jQuery), JSON Basics of Git/Subversion (whatever you use) The language we use (Ruby, Python, PHP, C#, whatever) Introduction the web framework we use (Rails, Django, ASP.NET MVC...) MVC - what/why/who RESTful web services - how to consume them and how to create one What's on your list?

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  • High density Silverlight charting control

    - by ahosie
    I've been looking into Silverlight charting controls to display a large number of samples, (~10,000 data points in five separate series - ~50k points all up). I have found the existing options produced by Dundas, Visifire, Microsoft etc to be extremely poor performers when displaying more than a few hundred data points. I believe the performance issues with existing chart controls is caused by the heavy use of vector graphics. Ergo one solution would be a client-side chart control that uses the WritableBitmap class to generate a raster chart. Before I fall too far down the wheel re-invention rabbit hole - has anyone found a third party or OSS control that will manage large numbers of data points on a sparkline?

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  • Create javadoc with multiple src dirs

    - by Ed Marty
    I have a Util package with source files in three seperate directories, defined like so: src/com/domain/util src/Standard/com/domain/util src/Extended/com/domain/util The package is built with the first set of files and either one of the second or third set, to create a total of two different implementations of the same interface. Now, I want to generate javadoc based on those files. How can I specify that? What I really want to do is javadoc com.domain.util -sourcepath ./src;./src/Standard to build the javadoc for the standard util package, and javadoc com.domain.util -sourcepath ./src;./src/Extended to build the javadoc for the extended util package. This doesn't work. The only way I've found so far to actually make it work is to merge the directory structure of the common classes and the Standard classes into another location and run with that for the standard javadoc, then do the same for the Extended package. Is there another way?

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  • Is there an easy way to get a list of all successful captures from a regex pre-5.10?

    - by Chas. Owens
    I know the right way to do this if I have Perl 5.10 is to use named captures and values %+, but in Perl 5.8.9 and how can I get a list of successful captures? I have come up with two methods that are both just terrible: #you need to list each possible match my @captures = grep { defined } ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16); and #ew, I turned on symbolic references { no strict 'refs'; my @captures = map { defined $+[$_] ? $$_ : () } 1 .. $#+; } There is a third option I have found involving (?{}), but it requires global variables (because the closure happens at compile time) and takes the regex from reasonably clear to ungodly mess. The only alternative I have found is to capture the whole match and then use another set of regexes to get the values I want (actually I build the first regex out of the other regexes because there is no good reason to duplicate the logic).

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  • Does it make sense to have more than one UDP Datagram socket on standby? Are "simultaneous" packets

    - by Gubatron
    I'm coding a networking application on Android. I'm thinking of having a single UDP port and Datagram socket that receives all the datagrams that are sent to it and then have different processing queues for these messages. I'm doubting if I should have a second or third UDP socket on standby. Some messages will be very short (100bytes or so), but others will have to transfer files. My concern is, will the Android kernel drop the small messages if it's too busy handling the bigger ones? Update "The latter function calls sock_queue_rcv_skb() (in sock.h), which queues the UDP packet on the socket's receive buffer. If no more space is left on the buffer, the packet is discarded. Filtering also is performed by this function, which calls sk_filter() just like TCP did. Finally, data_ready() is called, and UDP packet reception is completed."

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  • [AS2] Button Problem

    - by Adam Kiss
    problem hello, I have Button (with no name), which has a MovieClip child. this movie_clip called ax_kr has XX frames, each containing one image. Now, upon loading flash or frame containg this button (actually, 43 of them), I would like to tell to each button, that in your ax_kr MovieClip, load frame YY - first one would load frame 2, second frame 3, third frame 4 etc. etc. Or is there anyway to use one generic MovieClip/Button with that ax_kr MovieClip as child with frame xy as active and two more actions? (on RollOver, another MC on stage goes to frame xy (same as ax_kr has) and on Click, another MC on stage goes to frame xy (still the same number)) I did previously in as3 and find it quite okay, but now I have to enhance old as2 application and I feel like I should just kill myself.

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  • WPF Data virtualizing ListView

    - by Robert Jeppesen
    In our current WinForms app, we are displaying millions of records in ListView, using virtualization. Rows are loaded from DB as they are requested. This works well, with good performance. This is a showstopper for migrating to WPF for us. We need data virtualization in a ListView, like WinForms 2.0 has. Do you know a decent third-party control, or a relatively easy way of doing it with built-in controls? It doesn't need to be a DataGrid, a simple ListView will suffice. Note, I'm note talking about UI virtualization, it's data virtualization.

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  • asp.net web deployment

    - by CliffC
    i have successful created asp.net web deployment project under visual studio 2008 and everything works fine. However there is a new requirement from my user where they want to browse the location to install the web application instead of using the default install location. Is there anyway to achieve this ? or do i need to use some third party deployment tools? i have tried the sample transformation file on http://www.codeproject.com/KB/install/ChangeVDirWebSetupProject.aspx?fid=295594&fr=1&df=90&mpp=25&noise=3&sort=Position&view=Quick#xx0xx but it only seems to work under vs2005 thanks

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  • PlayDependencyClassLoader does not find application code

    - by jkschneider
    When a third party dependency attempts to load a class defined in a Play application using Class.forName(className, true, Thread.currentThread().getContextClassLoader()); Play will throw a ClassNotFoundException because the context class loader is of type PlayDependencyClassLoader which apparently only contains classes defined in jar dependencies. Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: eventstore.Commit at org.mapdb.SerializerPojo.classForName(SerializerPojo.java:96) at org.mapdb.SerializerPojo$1.deserialize(SerializerPojo.java:74) at org.mapdb.SerializerPojo$1.deserialize(SerializerPojo.java:39) This only occurs when Play is started with play run. Starting Play with play start loads the class correctly. It would be a shame to sacrifice the class hot-swapping because of this behavior. Is there a known workaround?

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