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Articles indexed in March 2010

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  • WPF: How to efficiently update an Image 30 times per second

    - by John
    Hello, I'm writing a WPF application that uses a component, and this component returns a pointer (IntPtr) to pixels of a bitmap (stride * height). I know in advance that the bitmap is a 24bits rgb, its width and height. Updating the Image control with these bitmaps makes up a video to the user, but I'm not sure what's the most efficient way to do that, most of the time the CPU usage goes to 75%+ and memory changing from 40mb to 500mb and the nI think GC starts to work and then it drops again to 40mm. The app starts to not be responsive. What shoud I do? thanks!

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  • How can I set the default value for a custom "Number" field in SharePoint?

    - by UnhipGlint
    I created a custom field for a content type I am creating using the XML below. <field ID="{GUID}" Required="False" DisplayName="Likes" Name="Likes" Type="Number" SourceID="http://schemas.microsoft.com/sharepoint/v3"><default>0</default></field> The field is meant to be used as a counter of sorts, and will be incremented programmatically. But, I can't get the value to default to "0" when a new item is created. However, for some reason, when I create a new column manually using the Site Collection settings page and configure it to default to "0" it works as it should. So far, I've tried the following tactics: I removed the "default" element from the field definition, and set the "DefaultValue" attribute on the content type definition. I exported a definition for the manually-created, working column (using an Imtech STSADM tool). Then, I added it to my field definitions XML and modified the IDs so that I could add it to my content type. When I did this, it still didn't work, even though it was exported from a working column! Any idea why this isn't working for me?

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  • Usability: Do mac users understand "right-click"?

    - by Stefan Kendall
    I have a feature of my application which depends on alternate-click. Windows users don't understand "alternate-click" though, and I was wondering if most mac users understood "right-click", and if so if they were offended or annoyed when they see such text. Does anyone have experience developing usable (consumer) applications for mac users? Does anyone have any opinions on this?

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  • SetPassword is very slow

    - by bja
    Hi We are experiencing a performance problem when communicating with the active directory using System.DirectoryServices. DirectoryEntry.Invoke("SetPassword", new object[] { password }) sometimes takes 15 seconds. The Service that makes the call is running on the same machine. What could make it that slow? Cheers, bja

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  • Wpa supplicant suddenly stopped working

    - by Grzenio
    Hi, Recently my wireless stopped working on my Debian testing system. It just doesn't connect. The best I get (only after a reboot) is that it says it did connect, but failed to get IP address. But usually it just tries to connect, disconnects straight away, connects again etc. so it never manages to associate correctly. I am sure it did work about a month ago, stopped working after recent upgrades from the repository. Any ideas how to find the issue and fix it?

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  • How can I sort Windows 7 control panel by columns, not rows

    - by user26453
    As best as I can tell the behavior of Windows 7's control panel is as follows: When Large Icons or Small Icons display modes are used, the icons are sorted alphabetically. However they are ordered by row: a b c d e f g h as opposed to what I usually expect in any file browser: a d g b e h c f Why is this the one part of Windows 7 that behaves this way and is there any way to change this behavior?

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  • How can you tell if a person is a programmer?

    - by Lucas Jones
    I was wondering when I read the famous "Programmer Habits" thread, I was wondering: Is there any way to tell if somebody is a programmer without actually asking them? Clarification: I am asking for things that you can use to recognise a programmer from "afar" or without knowing them well. To identify habits, you need to be around a person for a certain amount of time.

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  • How are java.lang.Object's protected methods protected from subclasses?

    - by Adrian Lang
    The keyword protected grants access to classes in the same package and subclasses (http://java.sun.com/docs/books/tutorial/java/javaOO/accesscontrol.html). Now, every class has java.lang.Object as superclass (http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html). Hence I conclude that every class may access java.lang.Object's methods even if they are protected. Take a look at the following example: public class Testclass { public Object getOne() throws CloneNotSupportedException { return this.clone(); } public Object getTwo() throws CloneNotSupportedException { return ((Object) this).clone(); } } While getOne() compiles fine, getTwo() gives Testclass.java:6: clone() has protected access in java.lang.Object return ((Object) this).clone(); I neither understand why getTwo() doesn't compile nor what's the difference (regarding the access of java.lang.Objects members) with getOne().

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  • Open Source CMS with linked sub-sections and users

    - by Teegijee
    I work at a small college that wants to make "sites" for all of the academic departments (~30). I managed to talk them out of their original idea: 30 individual Wordpress installations. What a maintenance nightmare! What I'm looking for is a CMS (preferably Python or PHP, as those are my areas of expertise) that can automagically create a subsection (or subsite, whatever the appropriate vernacular) complete with user and a couple of headings based on a template. So, I could just click a button and have a new subsection for a new department complete with its own authorized user, and default subsection headings/menu/pages. Is this just wishful thinking? I don't mind getting my hands dirty (this would be the whole of my job duties), so what platform would be a good starting point for something like this? Open source is a must for me as I have literally no budget, and I'm probably going to have to dig pretty deep into the application.

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  • Substitution till the end of the line in bash

    - by Werner
    Hi, I have a huge text file with lots of lines like: asdasdasdaasdasd_DATA_3424223423423423 gsgsdgsgs_DATA_6846343636 ..... I would like to do, for each line, to substitute from DATA_ .. to the end, with just empty space so I would get: asdasdasdaasdasd_DATA_ gsgsdgsgs_DATA_ ..... I know that you can do something similar with: sed -e "s/^DATA_*$/DATA_/g" filename.txt but it does not work. Do you know how? Thanks

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  • Will First() perform the OrderBy()?

    - by Martin
    Is there any difference in (asymptotic) performance between Orders.OrderBy(order => order.Date).First() and Orders.Where(order => order.Date == Orders.Max(x => x.Date)); i.e. will First() perform the OrderBy()? I'm guessing no. MSDN says enumerating the collection via foreach och GetEnumerator does but the phrasing does not exclude other extensions.

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  • How did this Ruby on Rails app get deployed?

    - by Ciera
    I have a Ruby on Rails app running on my server, and I can't figure out how it was deployed (someone else set it up). The app is located in /var/www/myapp. Before it was deployed, I had been able to go in there and make minor edits to the app. The person helping me out with RoR then "deployed" it. It was unclear what deploying actually did, since it points to the same database and is on the same server. However, I can no longer edit it (or at least, the files I am editing are not being pointed to by the server). Any way to figure out how this thing was deployed so I can take it down to edit it? Or should I basically just start over?

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  • Get coordinates of google maps markers

    - by App_beginner
    I am creating a databse containing the names and coordinates of all bus stops in my local area. I have all the names stored in my database, and now I need to add the coordinates. I am trying to get these of a website that contains them all as placemarks on a google map. It seems to me like they are being generated from a local server, and then added to the map. However I am unable to find exactly where the server is queried for the coordinates. I am hoping to collect these coordinates through the use of a screen scraper. However unless I am able to find where in the source code the coordinates are created this seems to be impossible. I can of course search and collect all these placemarks manually, but that will be very time consuming. So I am hoping that someone in here can help me. This is the website I am trying to scrape. The placemarks are marked by the blue bus sign: http://reiseplanlegger.skyss.no/scripts/travelmagic/TravelMagicWE.dll/?from=Brimnes+ferjekai+%28Eidfjord%29&to= You can also get the coordinates of a single placemark by writing the name of the stop in the search field and pushing the "Vis i kart" button. I hope someone can help me with this.

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  • If I Design a CPU Can I Get it Realized in Hardware at a Reasonable Cost?

    - by mudge
    I want to design a CPU and possibly memory and other hardware. I could do this with a hardware description language. Once I do this is it possible for me to send my designs to a manufacturer who will realize the design in hardware and send back to me the CPU(s) ? Can it be done at a reasonable cost? I want to design and make my own computer system and actually have it realized in hardware.

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  • Notepad++ IDL Syntax Highlighting?

    - by Nate
    I was about to create a user-defined language file for Notepad++ to syntax-highlight IDL. But before I went and spent the time creating one, I wanted to check with the "community" to see if anyone else has one that's ready to go. Does anyone have any suggestions?

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  • Can't open .svn/text-base/file.svn-base ?

    - by Earlz
    I'm using TortoiseSVN. I just made quite a few changes to my working copy and now I went to do a commit some of the files went through but at one file named Search.aspx.cs it says Commit failed (details follow): Can't open file 'C:\-----\trunk\.svn\text-base\Search.aspx.cs.svn-base': The system cannot find the file specified. I have tried doing a SVN update and SVN cleanup and nothing is restoring this file. I can't even create a diff because it gives a similar error about missing files. How do I fix this? What did I do to cause it?

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  • error C2784: Could not deduce template argument

    - by atch
    Hi guys, Still fighting with templates. In this example, despite the fact that is copied straight from a book I'm getting the following error message: Error 2 error C2784: 'IsClassT<T>::One IsClassT<T>::test(int C::* )' : could not deduce template argument for 'int C::* ' from 'int'. This is an example from a book Templates - The Complete Guide. (I work with Visual Studio 2010 RC). template<typename T> class IsClassT { private: typedef char One; typedef struct { char a[2]; } Two; template<typename C> static One test(int C::*); template<typename C> static Two test(…); public: enum { Yes = sizeof(IsClassT<T>::test<T>(0)) == 1 }; enum { No = !Yes }; }; class MyClass { }; struct MyStruct { }; union MyUnion { }; void myfunc() { } enum E {e1} e; // check by passing type as template argument template <typename T> void check() { if (IsClassT<T>::Yes) { std::cout << " IsClassT " << std::endl; } else { std::cout << " !IsClassT " << std::endl; } } // check by passing type as function call argument template <typename T> void checkT (T) { check<T>(); } int main() { /*std::cout << "int: "; check<int>(); */ std::cout << "MyClass: "; check<MyClass>(); } And although I know roughly what's going on in this example I cannot fix this error. Thanks for help.

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  • Silverlight UserControl with text field

    - by Rafal
    Hi, I've created a simple UserControl in ExpressionBlend. The UserControl is a ractangle with a TextBlock in it. When i use this UserContol in a Silverlight project, i can not change the text in the textBlock of the control. Should give an acces to the TextBlock before using the Control? HELP"_

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  • WCF: WSDL-first approach: Problems with generating fault types

    - by Juri
    Hi, I'm currently in the process of creating a WCF webservice which should be compatible with WS-I Basic Profile 1.1. I'm using a wsdl-first approach (actually for the first time), defining first the xsd for the complex types, the WSDL and then using svcutil.exe for generating the according server as well as client-side interfaces/proxies. So far everything works fine. Then I decided to add a fault to my WSDL. Regenerating with svcutil succeeded, but then I noticed that my generated fault doesn't have the properties I defined in my xsd file (which is imported by my WSDL). Fault XSD definition <?xml version="1.0" encoding="UTF-8"?> <schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="http://product.mycompany.com/groupsfault_v1.xsd" xmlns:tns="http://product.mycompany.com/groupsfault_v1.xsd"> <complexType name="groupsFault"> <sequence> <element name="code" type="int"/> <element name="message" type="string"/> </sequence> </complexType> </schema> Generated .Net fault object [System.Diagnostics.DebuggerStepThroughAttribute()] [System.CodeDom.Compiler.GeneratedCodeAttribute("System.Runtime.Serialization", "3.0.0.0")] [System.Xml.Serialization.XmlSchemaProviderAttribute("ExportSchema")] [System.Xml.Serialization.XmlRootAttribute(IsNullable=false)] public partial class groupFault : object, System.Xml.Serialization.IXmlSerializable { private System.Xml.XmlNode[] nodesField; private static System.Xml.XmlQualifiedName typeName = new System.Xml.XmlQualifiedName("groupFault", "http://sicp.services.siag.it/groups_v1.wsdl"); public System.Xml.XmlNode[] Nodes { get { return this.nodesField; } set { this.nodesField = value; } } public void ReadXml(System.Xml.XmlReader reader) { this.nodesField = System.Runtime.Serialization.XmlSerializableServices.ReadNodes(reader); } public void WriteXml(System.Xml.XmlWriter writer) { System.Runtime.Serialization.XmlSerializableServices.WriteNodes(writer, this.Nodes); } public System.Xml.Schema.XmlSchema GetSchema() { return null; } public static System.Xml.XmlQualifiedName ExportSchema(System.Xml.Schema.XmlSchemaSet schemas) { System.Runtime.Serialization.XmlSerializableServices.AddDefaultSchema(schemas, typeName); return typeName; } } Is this ok?? I'd expect to have an object created that contains properties for "code" and "message" s.t. you can then throw it by using something like ... throw new FaultException<groupFault>(new groupFault { code=100, message="error" }); ... (sorry for the lower-case type definitions, but this is generated code from the WSDL) Why doesn't the svcutil.exe generate those properties?? Some sources on the web suggested to add the /useSerializerForFaults option. I tried it, it doesn't work giving me an exception that the fault type is missing on the wsdl:portType declaration. Validation with several other tools succeeded however. Any help is VERY appreciated :) thx

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  • Ajax DragPanelExtender drag an item from one panel to another

    - by Morgeh
    I have a panel called "ItemPot" and several panels called "ItemBank1", "ItemBank2" etc. Currently I have dynamically added 5 items to the pot and given each one a DragPanelExtender so that those items can be moved around within the panel, however what I wan't to be able to do is to move those items into the banks and then save there new parent ID ("itembank1") to the database using C#. Does anyone know of an easy way of doing that? I have looked around the internet and I have found loads of ways of doing similar things using JQuery or Mootools but I would rather not have to use Javascript if possible, I know that might be wishful thinking lol.

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  • how to manipulate Json response like an object?

    - by loviji
    Hello, my jQuery.ajax return JSon object. I firstly read other articles. but their response text not likes mine. My Response content: from firebug response {"item":"[{\"country\":\"USA\",\"lan\":\"EN\"},{\"country\":\"Turkiye\",\"lan\":\"TR\"}]"} Now i trying to alert countryName: $('#loadData').click(function() { $.ajax({ type: "POST", url: "WS/myWS.asmx/getDaa", data: "{}", contentType: "application/json; charset=utf-8", dataType: "json", success: function(msg) { $("#jsonResponse").html(msg); $.each(msg.item, function(i, d) { alert(this.country); debugger; }); }, }); }); but it is alerting "undefined"

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  • How do I scrape information off ASP.NET websites when paging and JavaScript links are being used?

    - by Ian Roke
    I have been given a staff list which is supposed to be up to date but it doesn't match an intranet People Finder which is written in ASP.NET. As the information is sensitive I am not able to access the database the People Finder is using so the only way I can get at the information is by scraping the structure starting at the top brass at the top and then going through each tier in turn. Each person has a Staff number which then forms the URL http://intranet/peoplefinder/index.aspx?srn=ABC1234 and then all the people who report to them are listed underneth in the format <a id="gvEmployees_ctl03_lnkFullName" href="index.aspx?srn=ABC4321" target="_self"> where each URL indicates the Staff number and provides a link to their team. The trouble arises when the teams are big as paging is implemented in the GridView with an URL such as <a href="javascript:__doPostBack('gvEmployees','Page$2')">2</a>. How would I scrape this page, capture the SRN and other details along with the people who report to the person on all pages of the GridView then loop through each reportee and do the same process until the whole list is complete?

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