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  • .Net opening and closing database connections

    - by Dan
    I designed the data access portion of our framework so that every time a business object needs to interact with the database it would have to open a connection, invoke the data access layer (to execute the query), and then close the connection. Then if it needed to run in a transaction it would open the connection, begin the transaction, invoke the data access layer (to execute the query) and then commit the transaction, close the transaction, and finally close the connection. I did it this way with the mindset of open late and close early... but what if I needed to call other BO's to submit data in a single transaction? Is there a better way to handle opening and closing connections as well as working with transactions? I'm a rookie in designing application architecture so I hope I'm not doing this wrongly... any help is appreciated.

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  • Howto allow "Illegal characters in path" ?

    - by hbruce
    I have a MVC.NET application with one route as follows: routes.MapRoute("member", "member/{id}/{*name}", new { controller = "member", action = "Details", id = "" }, new { id = @"\d+" }); Thus, a link could be something like this: http://domain/member/123/any_kind_of_username This works fine in general but if the path contains illegal characters (e.g. a double qoute: http://domain/member/123/my_"user"_name) I get a "System.ArgumentException: Illegal characters in path." After much googling the best suggestions seems to be to make sure that the url doesn't contain any such characters. Unfortunately, that is out of my control in this case. Is there a way to work around this?

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  • Using MySQL as data source in Microsoft SQL Server Analysis Services

    - by coldilocks
    Hi, I have installed the latest .net connector (http://www.mysql.com/downloads/connector/net/), I can add MySQL databases as Data Sources, I can even browse through the data from Business Intelligence Studio. The problem is that I CANNOT create a datasource view, or if I do create one without tables, trying to add them after the fact gives me the same error. Specifically it looks like the data source view wizard tries to submit queries against the MySQL database using square brackets/braces, and the query bombs. I get an error message like: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '[my_db].[cheatType]' at line 2 So, in summary, has anyone been able to create a data source view using MySQL tables and, if so, can they please show me how this can be done. Thanks for any help!

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  • cross domain access in iframe from parent to child

    - by Aparna
    Hi, Could someone please help me with this- I've 2 applications AAA and BBB. The homepage of AAA contains an iFrame which displays the application BBB. When I login to AAA, the same login details should be used to login to BBB(single signon) and on pageload of the homepage of AAA, homepage of BBB should also be loaded in the iFrame. I tried to use javascript to access the form elements of login page of BBB to enter the login data and submit. But the browser gives me a 'Access is denied' error. I did a little reading and came to know that cross- domain communication is not allowed by the browser. Could someone tell me how i can go about achieving this?

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  • Inserting Large volume of data in SQL Server 2005

    - by Manjoor
    We have a application (written in c#) to store live stock market price in the database (SQL Server 2005). It insert about 1 Million record in a single day. Now we are adding some more segment of market into it and the no of records would be double (2 Millions/day). Currently the average record insertion per second is about 50, maximum is 450 and minimum is 0. To check certain conditions i have used service broker (asynchronous trigger) on my price table. It is running fine at this time(about 35% CPU utilization). Now i am planning to create a in memory dataset of current stock price. we would like to do some simple calculations. I want to know different views of members on this. Please provide your way of dealing with such situation.

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  • Design Question on when to save

    - by Ben
    Hi, I was just after peoples opinion on when the best time to save an object (or collection of objects) is. I appreciate that it can be completely dependent on the situation that you are in but here is my situation. I have a collection of objects "MyCollection" in a grid. You can open each object "MyObject" in an editor dialogue by double clicking on the grid. Selecting "Cancel" on the dialogue will back out any changes you have made, but should selecting "ok" commit those changes back to the database, or should they commit the changes on that object back to the collection and have a save method that iterates through the collection and saves all changed objects? If i have an object "MyParentObject", that contains a collection of childen "MyChildObjectCollection", none of the changes made to each "MyChildObject" would be commited to the database until the "MyParentObject" was saved - this makes sense. However in my current situation, none of the objects in the collection are linked, therefore should the "Ok" on the dialogue commit the changes to the database? Appreciate any opinions on this. Thanks

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  • Static Class Variables in Dynamic Library and Main Program

    - by Paul
    I am working on a project that has a class 'A' that contains a static stl container class. This class is included in both my main program and a .so file. The class uses the default(implicit, not declared) constructor/destructor. The main program loads the .so file using dlopen() and in its destructor, calls dlclose(). The program crashes after main exits when glibc calls the destructor for the static class member variable. The problem appears to be that when dlclose() is called, the destructor for the static variable is called, then when main exits() glibc also calls the destructor, resulting in a double free. I have 2 questions, namely: 1) In this particular case, why are there not two copies of the static variable(yes i know that sounds somewhat ridiculous, but since both the main program and .so file have a separately compiled 'A', shouldn't they each have one?) 2) Is there any way to resolve this issue without re-writing class 'A' to not contain static member variables?

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  • IWebBrowser: How to specify the encoding when loading html from a stream?

    - by Ian Boyd
    Using the concepts from the sample code provided by Microsoft for loading HTML content into an IWebBrowser from an IStream using the web browser's IPersistStreamInit interface: HRESULT LoadWebBrowserFromStream(IWebBrowser* pWebBrowser, IStream* pStream) { [snip] } How can one specify the encoding of the html inside the IStream? The IStream will contain a series of bytes, but the problem is what do those bytes represent? They could, for example, contain bytes where: each byte represents a character from the current Windows code-page (e.g. 1252) each byte could represent a character from the ISO-8859-1 character set the bytes could represent UTF-8 encoded characters every 2 bytes could represent a character, using UTF-16 encoding In my particular case, i am providing the IWebBrowser an IStream that contains a series of double-bytes characters (UTF-16), but the browser (incorrectly) believes that UTF-8 encoding is in effect. This results in garbled characters.

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  • Using jQuery UI with Rails

    - by Steve
    Hi, I am using jQuery in my Rails App. But when I try to turn my button to jQueryUI(Cupertino theme) button, it does not appear to be look like a jQuery UI Themed button. jQuery works because I am using it for Ajax and it works properly. I have pasted the code. Please tell me whether I am doing it wrongly <%=javascript_include_tag "jquery-1.4.2.min","jquery-ui-1.8.1.min","jquery.nivo.slider.pack","application"%> <input type = submit id = "add" name = "add" value = " Add " /> $("#add").button(); Thanks

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  • Firefox Upload Form Issue

    - by cast01
    Ive created an uplaod script in php that takes a file, resizes it, and creates a cropped square thumbnail. The script itself seems to work fine. However, when i tried to upload an image through firefox, on clicking the submit button the browser shows the loading animation, but it never calls the script, it just stays on the current page. If dont upload an image, then the script can be found and is run. I tried in safari, and i dont get the same problem, i can upload an image from the form, it will process it and take me the correct page. Ive tired just calling a basic script from the form, it just prints out the $_POST and $_FILES, and i get the same result, if an image is present, it wont get to the script, if no image is present, it runs fine. Im just wondering if anyone has any idea whats going on?

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  • Is there any simple way to test two PNGs for equality?

    - by Mason Wheeler
    I've got a bunch of PNG images, and I'm looking for a way to identify duplicates. By duplicates I mean, specifically, two PNG files whose uncompressed image data are identical, not necessarily whose files are identical. This means I can't do something simple like compare CRC hash values. I figure this can actually be done reliably since PNGs use lossless compression, but I'm worried about speed. I know I can winnow things down a little by testing for equal dimensions first, but when it comes time to actually compare the images against each other, is there any way to do it reasonably efficiently? (ie. faster than the "double-for-loop checking pixel values against each other" brute-force method?)

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  • Error on change form action

    - by Thomas
    Hi, I'm changing the form action with: window.onload = function() { document.getElementById('pdf').onclick = addExportEvent; document.getElementById('xls').onclick = addExportEvent; document.getElementById('xml').onclick = addExportEvent; document.getElementById('csv').onclick = addExportEvent; } function addExportEvent() { data = grid.getAllGridData(); document.getElementById('dados').setAttribute('value', encodeURIComponent(JSON.stringify(data))); formulario = document.getElementById('formulario'); // Line 55! formulario.action = 'php/' + this.id + '.php'; formulario.submit(); return false; } But it doesn't work with Internet Explorer. It returns the following error: Message: The object doesn't support the property or method. Line: 55 Character: 2 Code: 0 URI: http://www.site.com/javascript/scripts.js

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  • How to re-focus to a text field when focus is lost on a HTML form?

    - by Horace Ho
    There is only one text field on a HTML form. Users input some text, press Enter, submit the form, and the form is reloaded. The main use is barcode reading. I use the following code to set the focus to the text field: <script language="javascript"> <!-- document.getElementById("#{id}").focus() //--> </script> It works most of the time (if nobody touches the screen/mouse/keyboard). However, when the user click somewhere outside the field within the browser window (the white empty space), the cursor is gone. One a single field HTML form, how can I prevent the cursor from getting lost? Or, how to re-focus the cursor inside the field after the cursor is lost? thx!

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  • How to include file outside document root?

    - by Brayn
    Hey, What I want do to is to include 'file1.php' from 'domain1' into 'file2.php' on 'domain2'. So what I figured I should do is something like this: file2.php require_once '/var/www/vhosts/domain1/httpdocs/file1.php'; But this won't work for reasons I can't truly grasp. So what I did was to add my path to the include path. Something like: file2.php set_include_path(get_include_path() . PATH_SEPARATOR . "/var/www/vhosts/domain1/httpdocs"); require_once 'file1.php'; So can you please give me some hints as of where I'm doing wrong ? Thanks UPDATE - Either way I get the following error message: Fatal error: require() [function.require]: Failed opening required '/var/www/vhosts/domain1/httpdocs/file1.php' (include_path='.:/php/includes:/usr/share/pear/') in /var/www/vhosts/domain2/httpdocs/file2.php on line 4 Also I have tried this both with safe_mode On and Off. UPDATE2: Also I've changed the permissions to 777 on my test file and I've double-checked the paths to the include file in bash.

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  • Avoiding Mixup of Language Details

    - by DarenW
    Today someone asked me what was wrong with their source code. It was obvious. "Use double equals in place of that single equal in that if statement. Um, i think..." As i remember some languages actually take a single equals for comparison. Since i sometimes forget or mix up the syntax details among the several languages i use, i stepped over to my laptop to try a quickie experiment... It costs a bit of time and is a break in the flow to try "quick" experiments (though maybe the practice is good for memory.) What tips do you have for keeping straight in your mind the syntax (and other) details of multiple languages? (And nowadays, this applies just as well to the many wiki-like markups!)

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  • Django CSRF failure when form posts to a different frame

    - by Leopd
    I'm building a page where I want to have a form that posts to an iframe on the same page. The Template looks like this: <form action="form-results" method="post" target="resultspane" > {% csrf_token %} <input name="query"> <input type=submit> </form> <iframe src="form-results" name="resultspane" width="100%" height="70%"> </iframe> The view behind form-results is getting CSRF errors. Is there something special needed for cross-frame posting?

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  • jQuery - Trigger click event on links with spacebar?

    - by Herb Caudill
    It looks like in most browsers, an <input type="submit"> treats both [spacebar] and [enter] as a click, but an <a> link only treats [enter] as a click. My app uses a number of links formatted to simulate buttons, so a user that is accustomed to tabbing to a button and pressing [spacebar] will be frustrated. This bit of jQuery solves the problem: $("a.Button").die("keypress").live("keypress", function(e) { if (e.which == 32) { $(this).trigger("click"); e.preventDefault(); } }); My question: Is this a reason not to do this? I'm a little reluctant to override the browser's default behavior on something as basic as this, but since I'm already abusing the link tag to make it look like a button, at least this way I'm not violating the user's expectations any further.

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  • Boost graph libraries: setting edge weight values

    - by AndyUK
    I am investigating the use of the boost graph libraries in order to apply them to various network problems I have in mind. In the examples I have been looking at the graph edge values ("weights") are always initialized as integers, such as in these Bellman-Ford and Kruskal algorithms eg: int weights[] = { 1, 1, 2, 7, 3, 1, 1, 1 }; My problem is if I try and change the weights to double, I get a heap of warning messages about conversions etc, which so far I have not been able to figure out how to overcome. Does anyone see a way around this?

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  • Recovering 'old commits' from multiple git rebases

    - by Benjol
    I am aware of this question, but not to sure how to map it to my current situation. (Rebase is scary, undoing rebase is double scary!) I started out with several different feature branches of my master: master x-x-x-x-x-x-x-x-x-x \ \ \ FeatureA 1-2-3 \ \ FeatureB A-B \ FeatureC X-Y-Z I wanted to merge them all together and check they worked before merging back onto the top of master, so I did a: git checkout FeatureB git rebase FeatureA git mergetool //etc git rebase --continue Then git checkout FeatureC git rebase FeatureB git mergetool //hack hack git rebase --continue Which leaves me with master x-x-x-x-x-x-x-x-x-x \ FeatureA 1-2-3 \ FeatureB A'-B' \ FeatureC X'-Y'-Z' Then I corrected some bits that didn't compile properly, and got the whole feature set to an acceptable state: master x-x-x-x-x-x-x-x-x-x \ FeatureA 1-2-3 \ FeatureB A'-B' \ FeatureC X'-Y'-Z'-W My problem is that my colleagues tell me that we're not ready for FeatureA. Is there any way for me to keep all my work, but also revert to a situation where I can just rebase FeatureC on to Feature B?

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  • What is this error Found widget <g:ListBox class='dropdownbx' name='deleteDigits' ui:field='deletedi

    - by arinte
    I get this error when I run my Gwt app Found widget in an HTML context Here is a snippet of the xml that it complains about: ... `<g:HTML ui:field="localPanel">` `<fieldset>` `<legend>Local</legend>` `<label for="btn" >BTN:</label><input type="text" ui:field="btn" class="txtbx numeric" maxlength="10" name='btn'/>` `<label for="stdprt">SDT PRT:</label><input type="text" ui:field="stdprt" class="txtbx" readonly="readonly" name='stdPrt'/>` `<label for="rateArea">Rate Area:</label><input type="text" ui:field="ratearea" class="txtbx" readonly="readonly" name='rateArea'/>` `<br/>` `<label for="deleteDigits">Delete Digits:</label><g:ListBox ui:field='deletedigs' class="dropdownbx" name='deleteDigits'/>` `</fieldset>` `</g:HTML>` `<g:Button ui:field="submit2">Submit</g:Button>` `</g:HTMLPanel>` </ui:UiBinder>

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  • is it incorrect to define an hashcode of an object as the sum, multiplication, whatever, of all clas

    - by devoured elysium
    Let's say I have the following class: class ABC { private int myInt = 1; private double myDouble = 2; private String myString = "123"; private SomeRandomClass1 myRandomClass1 = new ... private SomeRandomClass2 myRandomClass2 = new ... //pseudo code public int myHashCode() { return 37 * myInt.hashcode() * myDouble.hashCode() * ... * myRandomClass.hashcode() } } Would this be a correct implementation of hashCode? This is not how I usually do it(I tend to follow Effective Java's guide-lines) but I always have the temptation to just do something like the above code. Thanks

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  • How to create a container that holds different types of function pointers in C++?

    - by Alex
    I'm doing a linear genetic programming project, where programs are bred and evolved by means of natural evolution mechanisms. Their "DNA" is basically a container (I've used arrays and vectors successfully) which contain function pointers to a set of functions available. Now, for simple problems, such as mathematical problems, I could use one type-defined function pointer which could point to functions that all return a double and all take as parameters two doubles. Unfortunately this is not very practical. I need to be able to have a container which can have different sorts of function pointers, say a function pointer to a function which takes no arguments, or a function which takes one argument, or a function which returns something, etc (you get the idea)... Is there any way to do this using any kind of container ? Could I do that using a container which contains polymorphic classes, which in their turn have various kinds of function pointers? I hope someone can direct me towards a solution because redesigning everything I've done so far is going to be painful.

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  • Unpacking Argument Lists and Instantiating WTForms objects from web.py

    - by Morris Cornell-Morgan
    After a bit of searching, I've found that it's possible to instantiate a WTForms object in web.py using the following code: form = my_form(**web.input()) web.input() returns a "dictionary-like" web.storage object, but without the double asterisks WTForms will raise an exception: TypeError: formdata should be a multidict-type wrapper that supports the 'getlist' method From the Python documentation I understand that the two asterisks are used to unpack a dictionary of named arguments. That said, I'm still a bit confused about exactly what is going on. What makes the web.storage object returned by web.input() "dictionary-like" enough that it can be unpacked by ** but not "dictionary-like" enough that it can be passed as-is to the WTForms constructor? I know that this is an extremely basic question, but any advice to help a novice programmer would be greatly appreciated!

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  • Listeners when using hylafax from Java

    - by DaDaDom
    I am trying to send a fax to a hylafax server via Java: Client faxClient = new HylaFAXClient(); faxClient.open(...); faxClient.user(...); faxClient.pass(...); Job j = faxClient.createJob(); job.setStuff(...); job.setNotifyType(Job.NOTIFY_ALL); faxClient.addTransferListener(new FaxTransferListener()); faxClient.addConnectionListiener(new FaxConnectionListener()); faxClient.submit(job); The problem is that I don't get any notifications on any of the listener methods. When I watch the queues on the hylafax server, e.g. via JHylaFax, the job failed, but how can I react to that event programatically on client side without having to poll the job queues regularly?

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  • How was non-decimal money represented in software?

    - by dan04
    A lot of the answers to the questions about the accuracy of float and double recommend the use of decimal for monetary amounts. This works because today all currencies are decimal except MGA and MRO, and those have subunits of 1/5 so are still decimal-friendly. But what about the software used in U.S. stock markets when prices were in 1/16ths of dollar? The accuracy of binary data types wouldn't have been an issue, right? Going further back, how did pre-1971 British accounting software deal with pounds, shillings, and pence? Did their versions of COBOL have a special PIC clause for it? Were all amounts stored in pence? How was decimalisation handled?

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