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• Multiple NSURLDownloads with Progress

  - by David Schiefer

  Hello, I'm trying to build a small app which allows downloading of multiple files at the same time while displaying them in a custom NSTableView. This works, i've done this by using an NSEnumerator, but I struggle at getting the progress right. It's calculated correctly, but it's not done individually for every download, instead they're added up. The way I've tried to set the subtitles containing the progress is by loading them into a separate array and then inserting/replacing objects containing the progress, but here I run into another problem - I don't know how to get the index of the object that's being downloaded, so I can't differentiate between the progresses. I hope you understand what I mean :P I've uploaded the source code to my server, I'd be really grateful if someone could have a look and help me out: http://web.me.com/david.schiefer/MyController.m

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• GET syntax in xpath

  - by David Doria

  I am trying to use a parameter that I pass to the page in an xpath query. This works properly (hard coded): <?php $xml = simplexml_load_file("bookstore.xml"); $res = $xml->xpath("/bookstore/book[title = 'Everyday Italian']"); echo $res[0]->author ?> but I pass the parameter with: bookdetails.php?title="Everyday Italian" and then do: <?php $xml = simplexml_load_file("bookstore.xml"); $res = $xml->xpath("/bookstore/book[title = $_GET['title']]"); echo $res[0]->author ?> I get a 500 error. Any thoughts? Thanks, David

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• Summing the results of Case queries in SQL

  - by David Stelfox

  I think this is a relatively straightforward question but I have spent the afternoon looking for an answer and cannot yet find it. So... I have a view with a country column and a number column. I want to make any number less than 10 'other' and then sum the 'other's into one value. For example, AR 10 AT 7 AU 11 BB 2 BE 23 BY 1 CL 2 I used CASE as follows: select country = case when number < 10 then 'Other' else country end, number from ... This replaces the countries values with less than 10 in the number column to other but I can't work out how to sum them. I want to end up with a table/view which looks like this: AR 10 AU 11 BE 23 Other 12 Any help is greatly appreciated. Cheers, David

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• python lxml problem

  - by David ???

  I'm trying to print/save a certain element's HTML from a web-page. I've retrieved the requested element's XPath from firebug. All I wish is to save this element to a file. I don't seem to succeed in doing so. (tried the XPath with and without a /text() at the end) I would appreciate any help, or past experience. 10x, David import urllib2,StringIO from lxml import etree url='http://www.tutiempo.net/en/Climate/Londres_Heathrow_Airport/12-2009/37720.htm' seite = urllib2.urlopen(url) html = seite.read() seite.close() parser = etree.HTMLParser() tree = etree.parse(StringIO.StringIO(html), parser) xpath = "/html/body/table/tbody/tr/td[2]/div/table/tbody/tr[6]/td/table/tbody/tr/td[3]/table/tbody/tr[3]/td/table/tbody/tr/td/table/tbody/tr/td/table/tbody/text()" elem = tree.xpath(xpath) print elem[0].strip().encode("utf-8")

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• C#: Hook up all events from object in single statement.

  - by David

  In my domain layer all domain objects emit events (of type InvalidDomainObjectEventHandler) to indicate invalid state when the IsValid property is called. On an aspx codebehind, I have to manually wire up the events for the domain object like this: _purchaseOrder.AmountIsNull += new DomainObject.InvalidDomainObjectEventHandler(HandleDomainObjectEvent); _purchaseOrder.NoReason += new DomainObject.InvalidDomainObjectEventHandler(HandleDomainObjectEvent); _purchaseOrder.NoSupplier += new DomainObject.InvalidDomainObjectEventHandler(HandleDomainObjectEvent); _purchaseOrder.BothNewAndExistingSupplier += new DomainObject.InvalidDomainObjectEventHandler(HandleDomainObjectEvent); Note that the same method is called in each case since the InvalidDomainobjectEventArgs class contains the message to display. Is there any way I can write a single statement to wire up all events of type InvalidDomainObjectEventHandler in one go? Thanks David

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• Pushing a variable onto a vector, value at that point in vector changes when the variable does.

  - by David Andrews

  I have a programming problem =) std::vector<char*> Names; if(MyPacket.ID == 3) {Names.push_back(MyPacket.Buffer);} I push the recieved buffer onto a vector like so, but when the buffer changes so does the value of the variable at that point in the vector. So say I sent and pushed a buffer containing 'Simon' onto the vector that would be fine so at point [0] on the vector would be the word Simon. but then when I recieve a new buffer it overwrites position [0] even though the packets ID is different, a breakpoint within the if statement is not reached with this new buffer. I really hope i'm explaining this well enough, I tried asking a friends advice and he pointed me towards this site. Any help appreciated David Andrews

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• ArchBeat Link-o-Rama Top 10 for November 4-10, 2012

  - by Bob Rhubart

  The Top 10 most popular items shared via the OTN ArchBeat Facebook Page for the week of November 4-10, 2012. OAM/OVD JVM Tuning | @FusionSecExpert Vinay from the Oracle Fusion Middleware Architecture Group (the very prolific A-Team) shares a process for analyzing and improving performance in Oracle Virtual Directory and Oracle Access Manager. Exploring Lambda Expressions for the Java Language and the JVM | Java Magazine In the latest //Java/Architect column in Java Magazine, Ben Evans, Martijn Verburg, and Trisha Gee explain how, "although Lambda expressions might seem unfamiliar to begin with, they're quite easy to pick up, and mastering them will be vital for writing applications that can take full advantage of modern multicore CPUs." SOA Galore: New Books for Technical Eyes Only Shake up up your technical skills with this trio of new technical books from community members covering SOA and BPM. Oracle Solaris 11.1 update focuses on database integration, cloud | Mark Fontecchio TechTarget editor Mark Fontecchio reports on the recent Oracle Solaris 11.1 release, with comments from IDC's Al Gillen. Solving Big Problems in Our 21st Century Information Society | Irving Wladawsky-Berger "I believe that the kind of extensive collaboration between the private sector, academia and government represented by the Internet revolution will be the way we will generally tackle big problems in the 21st century. Just as with the Internet, governments have a major role to play as the catalyst for many of the big projects that the private sector will then take forward and exploit. The need for high bandwidth, robust national broadband infrastructures is but one such example." — Irving Wladawsky-Berger ADF Mobile Custom Javasciprt – iFrame Injection | John Brunswick The ADF Mobile Framework provides a range of out of the box components to add within your AMX pages, according to John Brunswick. But what happens when "an out of the box component does not directly fulfill your development need? What options are available to extend your application interface?" John has an answer. Architects Matter: Making sense of the people who make sense of enterprise IT Why do architects matter? Oracle Enterprise Architect Eric Stephens suggests that you ask yourself this question the next time you take the elevator to the Oracle offices on the 45th floor of the Willis Tower in Chicago, Illinois (or any other skyscraper, for that matter). If you had to take the stairs to get to those offices, who would you blame? "You get the picture," he says. "Architecture is essential for any necessarily complex structure, be it a building or an enterprise." (Read the article...) Converting SSL certificate generated by a 3rd party to an Oracle Wallet | Paulo Albuquerque Oracle Fusion Middleware A-Team member Paulo Albuquerque shares "a workaround to get your private key, certificate and CA trusted certificates chain into Oracle Wallet." How Data and BPM are married to get the right information to the right people at the right time | Leon Smiers "Business Process Management…supports a large group of stakeholders within an organization, all with different needs," says Oracle ACE Leon Smiers. "End-to-end processes typically run across departments, stakeholders and applications, and can often have a long life-span. So how do organizations provide all stakeholders with the information they need?" Leon provides answers in this post. Updated Business Activity Monitoring (BAM) Class | Gary Barg Oracle SOA Team blogger Gary Barg has news for those interested in a skills upgrade. This updated Oracle University course "explains how to use Oracle BAM to monitor enterprise business activities across an enterprise in real time. You can measure your key performance indicators (KPIs), determine whether you are meeting service-level agreements (SLAs), and take corrective action in real time." Thought for the Day "For every complex problem, there is a solution that is simple, neat, and wrong." — H. L. Mencken (September 12, 1880 – January 29, 1956) Source: SoftwareQuotes.com

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• ArchBeat Link-o-Rama Top 10 for October 2012

  - by Bob Rhubart

  The Top 10 most popular items shared on the OTN ArchBeat Facebook Page for October 2012. OAM/OVD JVM Tuning | @FusionSecExpert Vinay from the Oracle Fusion Middleware Architecture Group (known as the A-Team) shares a process for analyzing and improving performance in Oracle Virtual Directory and Oracle Access Manager. SOA Galore: New Books for Technical Eyes Only Shake up up your technical skills with this trio of new technical books from community members covering SOA and BPM. Clustering ODI11g for High-Availability Part 1: Introduction and Architecture | Richard Yeardley "JEE agents can be deployed alongside, or instead of, standalone agents," says Rittman Meade's Richard Yeardley. "But there is one key advantage in using JEE agents and WebLogic – when you deploy JEE agents as part of a WebLogic cluster they can be configured together to form a high availability cluster." Learn more in Yeardley's extensive post. Solving Big Problems in Our 21st Century Information Society | Irving Wladawsky-Berger "I believe that the kind of extensive collaboration between the private sector, academia and government represented by the Internet revolution will be the way we will generally tackle big problems in the 21st century. Just as with the Internet, governments have a major role to play as the catalyst for many of the big projects that the private sector will then take forward and exploit. The need for high bandwidth, robust national broadband infrastructures is but one such example." -- Irving Wladawsky-Berger Eventually, 90% of tech budgets will be outside IT departments | ZDNet Another interesting post from ZDNet blogger Joe McKendrick about changing roles in IT. ADF Mobile - Login Functionality | Andrejus Baranovskis "The new ADF Mobile approach with native deployment is cool when you want to access phone functionality (camera, email, sms and etc.), also when you want to build mobile applications with advanced UI," reports Oracle ACE Director Andrejus Baranovskis. Podcast: Are You Future Proof? - Part 2 In Part 2, practicing architects and Oracle ACE Directors Ron Batra (AT&T), Basheer Khan (Innowave Technology), and Ronald van Luttikhuizen (Vennster) discuss re-tooling one’s skill set to reflect changes in enterprise IT, including the knowledge to steer stakeholders around the hype to what's truly valuable. ADF Mobile Custom Javascript — iFrame Injection | John Brunswick The ADF Mobile Framework provides a range of out of the box components to add within your AMX pages, according to John Brunswick. But what happens when "an out of the box component does not directly fulfill your development need? What options are available to extend your application interface?" John has an answer. Oracle Solaris 11.1 update focuses on database integration, cloud | Mark Fontecchio TechTarget editor Mark Fontecchio reports on the recent Oracle Solaris 11.1 release, with comments from IDC's Al Gillen. Architects Matter: Making sense of the people who make sense of enterprise IT Why do architects matter? Oracle Enterprise Architect Eric Stephens suggests that you ask yourself this question the next time you take the elevator to the Oracle offices on the 45th floor of the Willis Tower in Chicago, Illinois (or any other skyscraper, for that matter). If you had to take the stairs to get to those offices, who would you blame? "You get the picture," he says. "Architecture is essential for any necessarily complex structure, be it a building or an enterprise." (Read the article) Thought for the Day "I will contend that conceptual integrity is the most important consideration in system design. It is better to have a system omit certain anomalous features and improvements, but to reflect one set of design ideas, than to have one that contains many good but independent and uncoordinated ideas." — Frederick P. Brooks Source: SoftwareQuotes.com

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• Configuring Cisco 877W router from scratch for DHCP, WiFi, ADSL2+, NAT

  - by David M Williams

  Hi all, I apologise if this is a BIG question but I am quite lost with the Cisco IOS. I know what I want to achieve just not how to do it :( I have a Cisco 877W router with 4 FastEthernet interfaces, 1 ATM interface and 1 802.11 Radio. I want to set it up for a small network and am trying to construct a configuration below. I was using Google to try and flesh it out but I think I need help and guidance from actual experts! If it helps, output from show ver says Cisco IOS software, C870 software (C870-ADVSECURITYK9-M), version 12.4(4)T7, release software (fc1) ROM: System bootstrap, version 12.3(8r)YI4, release software Here's what I have so far, which hopefully outlines clearly enough what I am wanting to do. The bits in angle brackets are placeholders (eg the secret password). ! ! Set router hostname ! hostname Shazam ! ! Set usernames and passwords ! username david privilege 15 secret 0 <PASSWORD> enable secret <SECRETPASSWORD> ! ! Configure SSH and telnet access ! line vty 0 4 privilege level 15 login local transport input telnet ssh ! ! Local logging ! logging buffered 51200 warning ! ! Set date and time for NSW, Australia (GMT +10h) ! ! ! Set router IP address to 192.168.1.1 on FastEthernet0 port ! interface FastEthernet0 ip address 192.168.1.1 255.255.255.0 no shut ip nat inside ! ! Forward any unknown DNS requests to Google ! ip dns server ip name-server 8.8.8.8 ip name-server 8.8.4.4 ! ! Set up DHCP ! DHCP pool covers 192.168.1.100 - .199 ! Set gateway and DNS server to be the router, ie 192.168.1.1 ! service dhcp ip routing ip dhcp excluded-address 192.168.1.1 192.168.1.99 ip dhcp excluded-address 192.168.1.200 192.168.1.255 ip dhcp pool <DHCPPOOLNAME> network 192.168.1.0 255.255.255.0 default-router 192.168.1.1 dns-server 192.168.1.1 lease 7 ! ! DHCP reservations ! ! Assign IP address 192.168.1.105 to MAC address 00-21-5D-2F-58-04 ! ! Configure ADSL2 connection details ! interface atm dsl operating-mode adsl2+ ! ! Set up NAT rules ! ! Forward port 35394 to 192.168.1.105 ! ! Set up WiFi ! ! SSID visible, WPA2 security, Pre-shared key I'm hoping most of this is boiler-plate stuff to you guys. I'm keen to not just get a working script but to actually understand it also. Unfortunately, I'm finding the Cisco reference material online very complex. Thank you!

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• Retrive unchanged data

  - by cnkt

  How can i get the Doctrine_Record's unchanged version of field data. For example; echo $user->username; // Prints 'David' $user->username = 'John'; echo $user->username; // Prints 'John' How to get the pre-changed value (David)?

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• Mysql: how to extract multiple text files from my mysql table

  - by Patrick

  hi, I need to extract data from my mysql database into multiple text files. I have a table with 4 columns: UserID, UserName, Tag, Score. I need to create a text file for each Tag, with the userID, the userName and score (ordered by score) i.e. Tag1.txt 234922 John 35 234294 David 205 392423 Patrick 21 Tag2.txt 234922 John 35 234294 David 205 392423 Patrick 21 and so on... Edited: Sample: http://dl.dropbox.com/u/72686/expertsTable.png thanks

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• Sorting tree with other column in SQL Server 2008

  - by bodziec

  Hi, I have a table which implements a tree using hierarchyid column Sample data: People \ Girls \1\ Zoey \1\1\ Kate \1\2\ Monica \1\3\ Boys \2\ Mark \2\1\ David \2\2\ This is the order using hierarchyid column as sort column I would like to sort data using hierarchyid but also using name so it would look like this: People \ Boys \2\ David \2\2\ Mark \2\1\ Girls \1\ Kate \1\2\ Monica \1\3\ Zoey \1\1\ Is there a simple solution to do this? Czy da sie to zrobic w jednym zapytaniu sql ?

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• Thread resource sharing

  - by David

  I'm struggling with multi-threaded programming... I have an application that talks to an external device via a CAN to USB module. I've got the application talking on the CAN bus just fine, but there is a requirement for the application to transmit a "heartbeat" message every second. This sounds like a perfect time to use threads, so I created a thread that wakes up every second and sends the heartbeat. The problem I'm having is sharing the CAN bus interface. The heartbeat must only be sent when the bus is idle. How do I share the resource? Here is pseudo code showing what I have so far: TMainThread { Init: CanBusApi =new TCanBusApi; MutexMain =CreateMutex( "CanBusApiMutexName" ); HeartbeatThread =new THeartbeatThread( CanBusApi ); Execution: WaitForSingleObject( MutexMain ); CanBusApi->DoSomething(); ReleaseMutex( MutexMain ); } THeartbeatThread( CanBusApi ) { Init: MutexHeart =CreateMutex( "CanBusApiMutexName" ); Execution: Sleep( 1000 ); WaitForSingleObject( MutexHeart ); CanBusApi->DoHeartBeat(); ReleaseMutex( MutexHeart ); } The problem I'm seeing is that when DoHeartBeat is called, it causes the main thread to block while waiting for MutexMain as expected, but DoHeartBeat also stops. DoHeartBeat doesn't complete until after WaitForSingleObject(MutexMain) times out in failure. Does DoHeartBeat execute in the context of the MainThread or HeartBeatThread? It seems to be executing in MainThread. What am I doing wrong? Is there a better way? Thanks, David

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• Array of ArrayList Java

  - by David Bobo

  Hi, I am creating an PriorityQueue with multiple queues. I am using an Array to store the multiple ArrayLists that make up my different PriorityQueues. Here is what I have for my constructor so far: ArrayList<ProcessRecord> pq; ArrayList[] arrayQ; MultiList(){ arrayQ = new ArrayList[9]; pq = new ArrayList<ProcessRecord>(); } The problem comes when I am trying to get the size of the entire array, that is the sum of the sizes of each ArrayList in the array. public int getSize(){ int size = 0; for(int i = 1; i <=9; i++){ size = size + this.arrayQ[i].size(); } return size; } is not seeming to work. Am I declaring the Array of ArrayList correctly? I keep getting an error saying that this.arrayQ[i].size() is not a method. (the .size() being the problem) Thanks for any help! David

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• Visual Studio template not showing

  - by David

  Hi all I've followed this tutorial to try to add a template to Visual Studio: http://www.switchonthecode.com/tutorials/visual-studio-how-to-create-item-templates The template I have created is designed to add one predefined .aspx and one predefined .aspx.cs file to the project. The folder contains the following files: MoosePage.aspx MoosePage.aspx.cs MoosePage.vstemplate MoosePageItemTemplateIcon.ico The .vstemplate file looks like this: <VSTemplate Type="Item" Version="2.0.0" xmlns="http://schemas.microsoft.com/developer/vstemplate/2005"> <TemplateData> <Name>MoosePage</Name> <Description>MoosePage Template</Description> <DefaultName>NewMoosePage</DefaultName> <ProjectType>CSharp</ProjectType> <Icon>MoosePageItemTemplateIcon.ico</Icon> </TemplateData> <TemplateContent> <ProjectItem TargetFileName="$fileinputname$.aspx" ReplaceParameters="true"> MoosePage.aspx </ProjectItem> <ProjectItem TargetFileName="$fileinputname$.aspx.cs" ReplaceParameters="true"> MoosePage.aspx.cs </ProjectItem> </TemplateContent> </VSTemplate> I have zipped the files up (.zip not .zipx) and placed the zip folder in My Documents\Visual Studio 2008\Templates\ItemTemplates\VisualWebDeveloper. I have restarted Visual Studio. When I go into my website project and choose Add New Item, I don't see my new template. Can anyone suggest what might have gone wrong? Thanks David

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• Is there a GUI that I can use to create XML documents based on my schema?

  - by David Conlisk

  Hi all, I want to create a simple graphical user interface to allow non-technical users to create an XML file without having to manually edit the XML source. Ideally I'd like a drag and drop interface, but failing that, anything really. The contents of the XML file are similar to an encoded flow chart of a binary tree, so maybe something like Visio, with a save as xml option? Here's a quick sample of the XML output that is required: <?xml version="1.0" encoding="utf-8"?> <steps> <step id="1" type="prompt"> <prompt> Welcome. </prompt> <next>1.1</next> </step> <step id="1.1" type="question"> <prompt> Do you have what you need? </prompt> <yes>1.2</yes> <no>1.1.1</no> </step> ... </steps> Are there any existing tools out there that you can recommend for this purpose? Ideally open-source or with a free personal license, but I'm interested in hearing about all options. Thanks, David

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• Need advice on OOP philosophy

  - by David Jenings

  I'm trying to get the wheels turning on a large project in C#. My previous experience is in Delphi, where by default every form was created at applicaton startup and form references where held in (gasp) global variables. So I'm trying to adapt my thinking to a 100% object oriented environment, and my head is spinning just a little. My app will have a large collection of classes Most of these classes will only really need one instance. So I was thinking: static classes. I'm not really sure why, but much of what I've read here says that if my class is going to hold a state, which I take to mean any property values at all, I should use a singleton structure instead. Okay. But there are people out there who for reasons that escape me, think that singletons are evil too. None of these classes is in danger of being used anywhere except in this program. So they could certainly work fine as regular objects (vs singletons or static classes) Then there's the issue of interaction between objects. I'm tempted to create a Global class full of public static properties referencing the single instances of many of these classes. I've also considered just making them properties (static or instance, not sure which) of the MainForm. Then I'd have each of my classes be aware of the MainForm as Owner. Then the various objects could refer to each other as Owner.Object1, Owner.Object2, etc. I fear I'm running out of electronic ink, or at least taxing the patience of anyone kind enough to have stuck with me this long. I hope I have clearly explained my state of utter confusion. I'm just looking for some advice on best practices in my situation. All input is welcome and appreciated. Thanks in advance, David Jennings

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• Checkstyle: cannot summarise issues per author ?

  - by David Michel

  Hi all, I'm trying to use checkstyle for a java project but I can't seem to get it working properly: While it apparently runs smoothly, the html report doesn't give any info per authors as it should, i.e. the authors table is empty. The thing is I don't know how checkstyle identify an author. Does it look at the java doc tag @author ? at the class level or at the method level ? The ant task I used is below: <taskdef resource="checkstyletask.properties" classpath="${libs.dir}/checkstyle-all-5.0.jar"/> <target name="checkstyle" description="Generates a report of code convention violations."> <mkdir dir="${checkstyle.dir}"/> <checkstyle config="${util.dir}/checkstyle/sun_checks.xml" failureProperty="checkstyle.failure" failOnViolation="false"> <formatter type="xml" tofile="${checkstyle.dir}/checkstyle_report.xml"/> <fileset dir="${src.dir}" includes="**/*.java"/> </checkstyle> <xslt in="${checkstyle.dir}/checkstyle_report.xml" out="${checkstyle.dir}/checkstyle_report.html" style="${util.dir}/checkstyle/checkstyle-author.xsl"/> </target> Many thanks for your help David

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• Run a .java file using ProcessBuilder

  - by David K

  I'm a novice programmer working in Eclipse, and I need to get multiple processes running (this is going to be a simulation of a multi-computer system). My initial hackup used multiple threads to multiple classes, but now I'm trying to replace the threads with processes. From my reading, I've gleaned that ProcessBuilder is the way to go. I have tried many many versions of the input you see below, but cannot for the life of me figure out how to properly use it. I am trying to run the .java files I previously created as classes (which I have modified). I eventually just made a dummy test.java to make sure my process is working properly - its only function is to print that it ran. My code for the two files are below. Am I using ProcessBuilder correctly? Is this the correct way to read the output of my subprocess? Any help would be much appreciated. David primary process package Control; import java.io.*; import java.lang.*; public class runSPARmatch { /** * @param args */ public static void main(String args[]) { try { ProcessBuilder broker = new ProcessBuilder("javac.exe","test.java","src\\Broker\\"); Process runBroker = broker.start(); Reader reader = new InputStreamReader(runBroker.getInputStream()); int ch; while((ch = reader.read())!= -1) System.out.println((char)ch); reader.close(); runBroker.waitFor(); System.out.println("Program complete"); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } subprocess package Broker; public class test { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub System.out.println("This works"); } }

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• Why did i get this error?

  - by David

  here's the code: class Acount { int sum ; String owner ; //these seem to make sense //a constructor or two public Acount () { this.sum = 0 ; this.owner = "John Doe" ; } public Acount (String name) {this.sum = 0 ; this.owner = name ; } public Acount (String name, int sum) {this.sum = sum ; this.owner = name ; } //prints an acount in the format "owner" "sum" public static void printAcount (Acount Acount) {System.out.print (Acount.owner) ; System.out.print (" ") ; System.out.println (Acount.sum) ; } public static void main (String[]arg) { Acount Acount1 = new Acount ("david", 100) ; System.out.println ("heres the first acount as it was created:") ; printAcount (Acount1) ; System.out.println ("now i changed one of its instance varaibles with a static method") ; upOne (Acount1) ; printAcount (Acount1) ; } public static Acount upOne (Acount Acount) { Acount.sum = Acount.sum + 1 ; return Acount ; } } here's the error: Exception in thread "main" java.lang.NoClassDefFoundError: Acount/java What went wrong?

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• How to run validator from javascript?

  - by David Shochet

  Here is a part of my code: <asp:ListBox ID="lbRD" runat="server" DataSourceID="RDSqlDataSource" onchange="JSFillDetail();" DataTextField="????????" DataValueField="ID" Width="188px" Height="200px"/> <asp:TextBox ID="txtDescription" runat="server" /> <asp:RequiredFieldValidator ID="txtDescriptionRequiredFieldValidator" runat="server" ErrorMessage="???????? ???????? ???????????? ??? ??????????" ControlToValidate="txtDescription" /> I have a listbox, a textbox and a required field validator on my page. When the user selects something from the listbox, the selected item appears in the textbox using a javascript function. When the page is submitted, the validator reports an error in case the textbox is empty. If after that the user selects something from the listbox, the error message is still displayed, even though the textbox is not empty anymore. How can I make the validator validate the textbox, or even better, to clear the error message from the javascript function that fills the textbox? Thanks, David

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• .NET: Problems creating email attachment from MemoryStream.

  - by David

  Hi all I'm using the following method to create an attachment from a MemoryStream: public void AddAttachment(Stream stream, string filename, string mimeType) { byte[] buffer = ((MemoryStream) stream).GetBuffer(); Attachment attachment = new Attachment(stream, filename, mimeType); _mail.Attachments.Add(attachment); } Note that the first line is not necessary isn't necessary for the attachment functionality, it's just useful to have the byte[] handy during debugging so that I can see how big it is. (It generally has around 80,000 elements.) The code runs fine and the email is sent. When Outlook receives the email, in the Inbox it displays the attachment symbol, but when you go into the email the attachment isn't there. Unfortunately I don't have access to the mail server to find out more about the email, e.g. what the attachment looks like, its size etc. Can anyone suggest what properties of the MemoryStream argument might tell me if it is in some way invalid for attachment? Or think of anything else I might try? Thank you. David

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• Qt/C++, Problems with large QImage

  - by David Günzel

  I'm pretty new to C++/Qt and I'm trying to create an application with Visual Studio C++ and Qt (4.8.3). The application displays images using a QGraphicsView, I need to change the images at pixel level. The basic code is (simplified): QImage* img = new QImage(img_width,img_height,QImage::Format_RGB32); while(do_some_stuff) { img->setPixel(x,y,color); } QGraphicsPixmapItem* pm = new QGraphicsPixmapItem(QPixmap::fromImage(*img)); QGraphicsScene* sc = new QGraphicsScene; sc->setSceneRect(0,0,img->width(),img->height()); sc->addItem(pm); ui.graphicsView->setScene(sc); This works well for images up to around 12000x6000 pixel. The weird thing happens beyond this size. When I set img_width=16000 and img_height=8000, for example, the line img = new QImage(...) returns a null image. The image data should be around 512,000,000 bytes, so it shouldn't be too large, even on a 32 bit system. Also, my machine (Win 7 64bit, 8 GB RAM) should be capable of holding the data. I've also tried this version: uchar* imgbuf = (uchar*) malloc(img_width*img_height*4); QImage* img = new QImage(imgbuf,img_width,img_height,QImage::Format_RGB32); At first, this works. The img pointer is valid and calling img-width() for example returns the correct image width (instead of 0, in case the image pointer is null). But as soon as I call img-setPixel(), the pointer becomes null and img-width() returns 0. So what am I doing wrong? Or is there a better way of modifying large images on pixel level? Regards, David

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• Transfer data between C++ classes efficiently

  - by David

  Hi, Need help... I have 3 classes, Manager which holds 2 pointers. One to class A another to class B . A does not know about B and vise versa. A does some calculations and at the end it puts 3 floats into the clipboard. Next, B pulls from clipboard the 3 floats, and does it's own calculations. This loop is managed by the Manager and repeats many times (iteration after iteration). My problem: Now class A produces a vector of floats which class B needs. This vector can have more than 1000 values and I don't want to use the clipboard to transfer it to B as it will become time consumer, even bottleneck, since this behavior repeats step by step. Simple solution is that B will know A (set a pointer to A). Other one is to transfer a pointer to the vector via Manager But I'm looking for something different, more object oriented that won't break the existent separation between A and B Any ideas ? Many thanks David

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• Embed ActionScript (AS) into flash

  - by David ???

  Hey SO, I've never dealt with Flash/ActionScript, so please bear with me. Mostly, I'm a bit confused. I've done many work with Java/C as well as HTML/Javascript. I am working with a designer who provides me with flash files (.swf). From my point of view, it's a simple "mock" to which I need to embed a single object. This object is a TextBox, with which the user interacts. I need to be able to Insert such a TextBox to a Flash file Retrieve text upon key event process it, and return it to the TextBox As I understood from other posts, I'll be working with AS, right? How do I embed such an object to an existing Flash file? Being that the graphical part is over once I have the TextBox, would I need any fancy IDE for that? What IDE is that (I usually work with Eclipse)? One last note: I am working with that designer, so I have access to all her creation process. She does not know code, nor do I think she'll get it. I would much prefer to give her as little headache as possible (e.g. just instruct her how to export the files to me from her Adobe Flash CS5 studio). Many thanks, David

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