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  • UDF call in entity framework is cached

    - by Fred Yang
    I am doing a test after reading an article http://blogs.msdn.com/alexj/archive/2009/08/07/tip-30-how-to-use-a-custom-store-function.aspx about udf function called. When I use a function with objectContext.Entities.Where( t= udf(para1, para2) == 1), here the Entities is not ObjectQuery, but an ObjectSet, the first time I call the method, it runs correctly, if I reuse the objectContext,and run it again but with different para1, para2, then the previous parameter values still cached, and the result is same as previous one, which is wrong. The sql profiler shows that both query hit the database, but the t-sql is the same. Am I missing something? And the ObjectSet does not support .where(esql_string). How to get udf working with ObjectSet? Thanks Fred

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  • How to group a complex list of objects using LINQ?

    - by Daoming Yang
    I want to select and group the products, and rank them by the number of times they occur. For example, I have an OrderList each of order object has a OrderProductVariantList(OrderLineList), and each of OrderProductVariant object has ProductVariant, and then the ProductVariant object will have a Product object which contains product information. A friend helped me with the following code. It could be compiled, but it did not return any value/result. I used the watch window for the query and it gave me "The name 'query' does not exist in the current context". Can anyone help me? Many thanks. var query = orderList.SelectMany( o => o.OrderLineList ) // results in IEnumerable<OrderProductVariant> .Select( opv => opv.ProductVariant ) .Select( pv => p.Product ) .GroupBy( p => p ) .Select( g => new { Product = g.Key, Count = g.Count() });

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  • FileReference.load() does not as excepted

    - by Yang Bo
    I used Flash player 10, and Flex SDK 3.4. The code as followings: // Following comes callbacks function imageLoadOpenCallback(evt:Event):void { trace("in--open"); } function imageLoadCompleteCallback(evt:Event):void { trace("in--load"); var fr:FileReference = evt.target as FileReference; trace(fr.data); } function imageLoadErrorCallback(evt:IOErrorEvent):void { trace("in--ioerror"); } function imageSelectCancelCallback(evt:Event):void { trace("in cancel"); } function imageSelectCallback(evt:Event):void { trace("in -- select"); for (var i:int=0; i<frl.fileList.length; i++) { frl.fileList[i].addEventListener(Event.OPEN, imageLoadOpenCallback); frl.fileList[i].addEventListener(Event.COMPLETE, imageLoadCompleteCallback); frl.fileList[i].addEventListener(IOErrorEvent.IO_ERROR, imageLoadErrorCallback); frl.fileList[i].load(); trace(frl.fileList[i]); trace(frl.fileList[i].creationDate); trace(frl.fileList[i].creator); trace(frl.fileList[i].data); trace(frl.fileList[i].name); } } // Following comes UI handlers function onAddPictures():void { var imageFilter:FileFilter = new FileFilter("Images", "*.jpg;*.png"); frl.addEventListener(Event.SELECT, imageSelectCallback); frl.addEventListener(Event.CANCEL, imageSelectCancelCallback); frl.browse([imageFilter]); } Only the imageSelectCancelCallback handler get called when I select some files in the dialog. But no load/open/io_error handler get called at all. I have Google some code example, in which it used FileReference instead of FileReferenceList. I don't know the reason, could you please help me?

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  • Javscript closure questions

    - by Shuchun Yang
    While I was reading the book Javascript: The Good Parts. I can not understand the piece of code bellow: We can generalize this by making a function that helps us make memoized functions. The memoizer function will take an initial memo array and the fundamental function. It returns a shell function that manages the memo store and that calls the fundamental function as needed. We pass the shell function and the function's parameters to the fundamental function: var memoizer = function (memo, fundamental) { var shell = function (n) { var result = memo[n]; if (typeof result !== 'number') { result = fundamental(shell, n); memo[n] = result; } return result; }; return shell; }; We can now define fibonacci with the memoizer, providing the initial memo array and fundamental function: var fibonacci = memoizer([0, 1], function (test, n) { return test(n - 1) + test(n - 2); }); My question is what is the test function? When does it get defined and invoked? It seems very confusing to me. Also I think this statement: memo[n] = result; is useless. Please correct if I am wrong.

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  • Visual Modeler in VS 6

    - by Yogi Yang 007
    Till date I have used only VB6 Professional for developing apps. But recently I have joined a company which owns VS 6 Enterprise (or some such version) I was just exploring what is available in VS 6 Ent. and I found Visual Modeler. The tutorial provided with it is not good enough. I was wondering if there is any detailed tutorial(s) for Visual Modeler? Is Visual Modeler a cut down version of Rational Rose? I have never used such a tool for developing apps. What are the benefits of developing apps like this? The document claims that one can speed up development and modifications of VB6 & VC++ 6 applications. How true is this claim? My company also has Ration Rose 6. Which is better Rational Rose 6 or Visual Modeler that comes with VS 6 Ent.?

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  • Java Regex Matcher Question

    - by Yang
    How do I match an URL string like this: img src = "http://stackoverflow.com/a/b/c/d/someimage.jpg" where only the domain name and the file extension (jpg) is fixed while others are variables? The following code does not seem working: Pattern p = Pattern.compile("<img src=\"http://stachoverflow.com/.*jpg"); // Create a matcher with an input string Matcher m = p.matcher(url); while (m.find()) { String s = m.toString(); }

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  • Makefile error: Unexpected end of line seen

    - by Winston C. Yang
    Trying to install Git, I ran configure and make, but got the following error message: make: Fatal error in reader: Makefile, line 221: Unexpected end of line seen The Makefile looks like: 218: GIT-VERSION-FILE: FORCE 219: @$(SHELL_PATH) ./GIT-VERSION-GEN 220: -include GIT-VERSION-FILE 221: 222: uname_S := $(shell sh -c 'uname -s 2>/dev/null øø echo not') What's causing the error? The following information may or may not be relevant: I tried to install Git 1.7.0.3 on SunOS 5.9 (Solaris 9) in a directory in my account. The gcc version is 3.4.2 (older then the version of 3.4.6 stated by sunfreeware.com). I don't have root privileges.

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  • ASP with Crystal Report 9 hangs on .NET framework 3.5

    - by Chris Yang
    We have an ASP (not ASP.NET) application running on Windows 2003 server. One of the functions of the application is to generate reports using Crystal Report 9. It has been working without any problem with .NET Framework 2.0 and now it is required to install .NET Framework 3.5 SP1 on the server but after we installed the 3.5 SP1, every time we run the application the Crystal report is not generated and the web page hangs so we have to recycle the application pool in IIS to get the application back going. Does anyone have any idea/solution to this problem? Any help will be greatly appreciate.

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  • understanding json

    - by Yang
    JSON stands for JavaScript Object Notation. But how come languages like php, java, c etc can also communication each other with json. What I want to know is that, am i correct to say that json is not limited to js only, but served as a protocol for applications to communicate with each other over the network, which is the same purpose as XML?

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  • Reading Foxpro database date field using PHP

    - by Bill Yang
    I've wrote a PHP script to export a Foxpro database to other formats by using ADODB (http://phplens.com/lens/adodb) library to access Foxpro OLE DB provider. Everything worked fine except the date fields are mangled and become like these: 11/17-/2-00 3/4/-20-08 By comparing to actual data I can guess that it is probably in the format of MM/DD/YYYY or m/d/YYYY. How can I properly export the date field?

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  • mysql, sqlite database source code

    - by Yang
    hi guys, i know implementing database is a huge topic, but i want to have a basic understanding of how database systems works (e.g. memory management, binary tree, transaction, sql parsing, multi-threading, partitions, etc) by investigating the source code of the database, since there are a few already proven very robust open source databases like mysql, sqlite and so on. however, the code are very complicated and i have no clue where to start. also i find that the old school database textbooks are only explaining the theory, not the implementation details. Can anyone suggest how should i get started and is there any books that emphasis on the technology and techniques of building dbms used in modern database industry? Thank in advance!

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  • Face detection in 100% pure PHP

    - by Yogi Yang 007
    I am looking for PHP script that will detect face in a uploaded photo and automatically crop it accordingly. The code should be in pure PHP without depending on any third party API's or Libs. This code will be a part of our existing code for processing images. In fact this is the only part that is missing! I would prefer to have code in PHP version 5.x not PHP 6.x.

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  • Bloated PDF created by TCPDF

    - by Yogi Yang 007
    In a web app developed in PHP we are generating Quotations and Invoices (which are very simple and of single page) using TCPDF lib. The lib is working just great but it seems to generate very large PDF files. For example in our case it is generating PDF files as large as 4 MB (+/- a few KB). How to reduce this bloating of PDF files generated by TCPDF? Here is code snippet that I am using ob_start(); include('quote_view_bag_pdf.php'); //This file is valid HTML file with PHP code to insert data from DB $quote = ob_get_contents(); //Capture the content of 'quote_view_bag_pdf.php' file and store in variable ob_end_clean(); //Code to generate PDF file for this Quote //This line is to fix a few errors in tcpdf $k_path_url=''; require_once('tcpdf/config/lang/eng.php'); require_once('tcpdf/tcpdf.php'); // create new PDF document $pdf = new TCPDF(); // remove default header/footer $pdf->setPrintHeader(false); $pdf->setPrintFooter(false); // add a page $pdf->AddPage(); // print html formated text $pdf->writeHtml($quote, true, 0, true, 0); //Insert Variables contents here. //Build Out File Name $pdf_out_file = "pdf/Quote_".$_POST['quote_id']."_.pdf"; //Close and output PDF document $pdf->Output($pdf_out_file, 'F'); $pdf->Output($pdf_out_file, 'I'); /////////////// enter code here Hope this code fragment will give some idea?

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  • Accessing Arguments, Workflow Variables from custom activities

    - by yang
    I have a workflow composed of many custom activities. All these activities need to access startup arguments of the workflow itself. I can define InArgument inside all these custom activities and bind the workflow arguments to custom activity arguments but I am not comfortable with this solution. What is the best way to access workflow level argument and variable declarations from custom activities. Can I get them from ActivityContext? Thanks.

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  • CDI SessionScoped Bean instance remains unchanged when login with different user

    - by Jason Yang
    I've been looking for the workaround of this problem for rather plenty of time and no result, so I ask question here. Simply speaking, I'm using a CDI SessionScoped Bean User in my project to manage user information and display them on jsf pages. Also container-managed j_security_check is used to resolve authentication issue. Everything is fine if first logout with session.invalidate() and then login in the same browser tab with a different user. But when I tried to directly login (through login.jsf) with a new user without logout beforehand, I found the user information remaining unchanged. I debugged and found the User bean, as well as the HttpSession instance, always remaining the same if login with different users in the same browser, as long as session.invalidate() not invoked. But oddly, the session id did modified, and I've both checked in Java code and Firebug. org.apache.catalina.session.StandardSessionFacade@5d7b4092 StandardSession[c69a71d19f369d08b5dddbea2ef0] attrName = org.jboss.weld.context.conversation.ConversationIdGenerator : attrValue=org.jboss.weld.context.conversation.ConversationIdGenerator@583c9dd8 attrName = org.jboss.weld.context.ConversationContext.conversations : attrValue = {} attrName = org.jboss.weld.context.http.HttpSessionContext#org.jboss.weld.bean-Discipline-ManagedBean-class com.netease.qa.discipline.profile.User : attrValue = Bean: Managed Bean [class com.netease.qa.discipline.profile.User] with qualifiers [@Any @Default @Named]; Instance: com.netease.qa.discipline.profile.User@c497c7c; CreationalContext: org.jboss.weld.context.CreationalContextImpl@739efd29 attrName = javax.faces.request.charset : attrValue = UTF-8 org.apache.catalina.session.StandardSessionFacade@5d7b4092 StandardSession[c6ab4b0c51ee0a649ef696faef75] attrName = org.jboss.weld.context.conversation.ConversationIdGenerator : attrValue = org.jboss.weld.context.conversation.ConversationIdGenerator@583c9dd8 attrName = com.sun.faces.renderkit.ServerSideStateHelper.LogicalViewMap : attrValue = {-4968076393130137442={-7694826198761889564=[Ljava.lang.Object;@43ff5d6c}} attrName = org.jboss.weld.context.ConversationContext.conversations : attrValue = {} attrName = org.jboss.weld.context.http.HttpSessionContext#org.jboss.weld.bean-Discipline-ManagedBean-class com.netease.qa.discipline.profile.User : attrValue = Bean: Managed Bean [class com.netease.qa.discipline.profile.User] with qualifiers [@Any @Default @Named]; Instance: com.netease.qa.discipline.profile.User@c497c7c; CreationalContext: org.jboss.weld.context.CreationalContextImpl@739efd29 attrName = javax.faces.request.charset : attrValue = UTF-8 Above block contains two successive logins and their Session info. We can see that the instance(1st row) the same while session id(2nd row) different. Seems that session object is reused to contain different session id and CDI framework manages session bean life cycle in accordance with the session object only(?). I'm wondering whether there could be only one server-side session object within the same browser unless invalidated? Since I'm adopting j_security_check I fancy intercepting it and invalidating old session is not so easy. So is it possible to accomplish the goal without altering the CDI+JSF+j_security_check design that one can relogin with different account in the same or different tab within the same browser? Really look forward for your response. More info: Glassfish v3.1 is my appserver.

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  • silverlight Socket: Unhandled Error in Silverlight Application An attempt was made to access a sock

    - by Yang
    I basically try to reproduce the Socket example from here: http://www.silverlightshow.net/items/Sockets-and-their-implementation-in-SL2-Beta-1-including-a-chat-like-example.aspx I only made a small change in the client side, i.e., String safeHost = "127.0.0.1"; int port = 4509; Then I got this permission error? Any idea why? Unhandled Error in Silverlight Application An attempt was made to access a socket in a way forbidden by its access permissions.

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  • How to merge two single column csv files with linux commands

    - by user1328191
    I was wondering how to merge two single column csv files into one file where the resulting file will contain two columns. file1.csv    first_name    chris    ben    jerry file2.csv    last_name    smith    white    perry result.csv    first_name,last_name    chris,smith    ben,white    jerry,perry Thanks

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  • How to use Linq group a order list by Date

    - by Daoming Yang
    I have a order list and want to group them by the created date. Each order's created datetime will be like "2010-03-13 11:17:16.000" How can I make them only group by date like "2010-03-13"? var items = orderList.GroupBy(t => t.DateCreated) .Select(g => new Order() { DateCreated = g.Key }) .OrderByDescending(x => x.OrderID).ToList();

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  • android: customized text selector

    - by Yang
    I wanted to design a customized text selector that changed the text color when user clicks the TextView. But got the following error: java.lang.RuntimeException: Unable to start activity ComponentInfo{}: android.view.InflateException: Binary XML file line #55: Error inflating class here is what I have: res/text_selector.xml <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_enabled="false" android:state_focused="true" android:drawable="@color/black" /> <item android:state_pressed="true" android:drawable="@color/blue" /> <item android:state_focused="true" android:drawable="@color/black" /> </selector> layout/textview.xml <TextView android:id = "@+id/last_page_button" android:text="@string/last_page_button_string" android:gravity="center_horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="#ffffff" android:textColor = "@drawable/text_selector" android:layout_weight="1" /> values/color.xml <resources> <color name="white">#ffffffff</color> <color name="black">#ff000000</color> <color name="blue">#ffccddff</color>

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  • A free Step by Step guide to learning Sparx Enterprise Architect

    - by Yogi Yang 007
    I have just downloaded Sparx Enterprise Architect 7.5 but unfortunately I am not able to find a getting started guide or something like that. I have gone through official site of Sparx but there is not step by step guide to learning Sparx EA. I want a guide that will implement a small project and give instructions step by step so that I can understand and try out Sparx EA. I did find a few sites selling step by step guides but at this point of time I do not want to spend money on them.

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  • Android: Unable to make httprequest behind firewall

    - by Yang
    The standard getUrlContent works welll when there is no firewall. But I got exceptions when I try to do it behind a firewall. I've tried to set "http proxy server" in AVD manager, but it didn't work. Any idea how to correctly set it up? protected static synchronized String getUrlContent(String url) throws ApiException { if(url.equals("try")){ return "thanks"; } if (sUserAgent == null) { throw new ApiException("User-Agent string must be prepared"); } // Create client and set our specific user-agent string HttpClient client = new DefaultHttpClient(); HttpGet request = new HttpGet(url); request.setHeader("User-Agent", sUserAgent); try { HttpResponse response = client.execute(request); // Check if server response is valid StatusLine status = response.getStatusLine(); if (status.getStatusCode() != HTTP_STATUS_OK) { throw new ApiException("Invalid response from server: " + status.toString()); } // Pull content stream from response HttpEntity entity = response.getEntity(); InputStream inputStream = entity.getContent(); ByteArrayOutputStream content = new ByteArrayOutputStream(); // Read response into a buffered stream int readBytes = 0; while ((readBytes = inputStream.read(sBuffer)) != -1) { content.write(sBuffer, 0, readBytes); } // Return result from buffered stream return new String(content.toByteArray()); } catch (IOException e) { throw new ApiException("Problem communicating with API", e); } }

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  • Looking for a visualization and charting package

    - by Jeff Meatball Yang
    I have some specific requirements, with the most important at the top: Can plot line and stacked bar charts Can customize mouse events (hover, click) on chart data Compatible and performant with IE7/8 (likely will use excanvas.js) Can optionally control label formats, legends, colors Open source preferred, or at least can purchase the source Can be hosted locally I have seen a couple potentially good ones: Google's interactive charts (But code must be accessed via Google servers) EJSChart Flot Does anyone have experience with these, or others, and can make a recommendation?

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