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  • How do I flip a column in mysql that has data structured: 'last name, first name'?

    - by ggg
    I want to create a new column in a MYSQL table that has Fn Ln instead of Ln, Fn. Most of my data is printed Fn Ln. Another idea is to incorporate a string function each time there is an output (php based) but that seems to waste resources. Finally, I couldn't find the syntax (loop or foreach) for my php function anyway. Here is the working php function that I got from a previous post: $name = "Lastname, Firstname"; $names = explode(", ", $name); $name = $names[1] . " " . $names[0];

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  • Jquery submit form error

    - by Gandalf StormCrow
    I have a form which I want to submit upon button click which is outside the form, here is my HTML : <form id="checkin" name="checkin" id="checkin" action#" method="post"> <input type="text" tabindex="100" class="identifier" name="identifier" id="identifier"> <input type="submit" tabindex="101" value="Submito" class="elsubmito" name="submit"> </form> Here is my jQuery : $("button").live('click', function(){ $("#checkin").submit(); }); $("#checkin").live('submit', function(){ }); When I click submit button inside the form its submitting ok, but its not submitting when I click on the button which is outside the form tags, why? how can I fix this ?

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  • How to set AeDebug to get a minidump with the name of the process ?

    - by JC Martin
    I have to perform some post mortem debugging on a C++ project. Known way to perform is to set the cdb debugger as a minidump generator and to process the dumps collects afterwards. I read nearly the whole web and I didn't find a solution to produce a minidump with the name of the process that has crashed Is there a way to set AeDebug\Debugger registry variable in such a manner that cdb generates a dump file with the name of the process ? When I encapsulate the call to cdb.exe in a batch file, it starts well but stays blocked on the symbol searching. I must perform a Ctrl+C in order to stop the batch, then the minidump, with the correct process name, is created... but of course I can't set up such a thing in an unattended production environment... Has anybody done that before ?

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  • The remote server returned an error: (400) Bad Request - uploading less 2MB file size?

    - by fiberOptics
    The file succeed to upload when it is 2KB or lower in size. The main reason why I use streaming is to be able to upload file up to at least 1 GB. But when I try to upload file with less 1MB size, I get bad request. It is my first time to deal with downloading and uploading process, so I can't easily find the cause of error. Testing part: private void button24_Click(object sender, EventArgs e) { try { OpenFileDialog openfile = new OpenFileDialog(); if (openfile.ShowDialog() == System.Windows.Forms.DialogResult.OK) { string port = "3445"; byte[] fileStream; using (FileStream fs = new FileStream(openfile.FileName, FileMode.Open, FileAccess.Read, FileShare.Read)) { fileStream = new byte[fs.Length]; fs.Read(fileStream, 0, (int)fs.Length); fs.Close(); fs.Dispose(); } string baseAddress = "http://localhost:" + port + "/File/AddStream?fileID=9"; HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(baseAddress); request.Method = "POST"; request.ContentType = "text/plain"; //request.ContentType = "application/octet-stream"; Stream serverStream = request.GetRequestStream(); serverStream.Write(fileStream, 0, fileStream.Length); serverStream.Close(); using (HttpWebResponse response = request.GetResponse() as HttpWebResponse) { int statusCode = (int)response.StatusCode; StreamReader reader = new StreamReader(response.GetResponseStream()); } } } catch (Exception ex) { MessageBox.Show(ex.Message); } } Service: [WebInvoke(UriTemplate = "AddStream?fileID={fileID}", Method = "POST", BodyStyle = WebMessageBodyStyle.Bare)] public bool AddStream(long fileID, System.IO.Stream fileStream) { ClasslLogic.FileComponent svc = new ClasslLogic.FileComponent(); return svc.AddStream(fileID, fileStream); } Server code for streaming: namespace ClasslLogic { public class StreamObject : IStreamObject { public bool UploadFile(string filename, Stream fileStream) { try { FileStream fileToupload = new FileStream(filename, FileMode.Create); byte[] bytearray = new byte[10000]; int bytesRead, totalBytesRead = 0; do { bytesRead = fileStream.Read(bytearray, 0, bytearray.Length); totalBytesRead += bytesRead; } while (bytesRead > 0); fileToupload.Write(bytearray, 0, bytearray.Length); fileToupload.Close(); fileToupload.Dispose(); } catch (Exception ex) { throw new Exception(ex.Message); } return true; } } } Web config: <system.serviceModel> <bindings> <basicHttpBinding> <binding> <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="2097152" maxBytesPerRead="4096" maxNameTableCharCount="2097152" /> <security mode="None" /> </binding> <binding name="ClassLogicBasicTransfer" closeTimeout="00:05:00" openTimeout="00:05:00" receiveTimeout="00:15:00" sendTimeout="00:01:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferPoolSize="67108864" maxReceivedMessageSize="67108864" messageEncoding="Mtom" textEncoding="utf-8" useDefaultWebProxy="true"> <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="67108864" maxBytesPerRead="4096" maxNameTableCharCount="67108864" /> <security mode="None"> <transport clientCredentialType="None" proxyCredentialType="None" realm="" /> <message clientCredentialType="UserName" algorithmSuite="Default" /> </security> </binding> <binding name="BaseLogicWSHTTP"> <security mode="None" /> </binding> <binding name="BaseLogicWSHTTPSec" /> </basicHttpBinding> </bindings> <behaviors> <serviceBehaviors> <behavior> <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment --> <serviceMetadata httpGetEnabled="true" /> <!-- To receive exception details in faults for debugging purposes, set the value below to true. Set to false before deployment to avoid disclosing exception information --> <serviceDebug includeExceptionDetailInFaults="true" /> </behavior> </serviceBehaviors> </behaviors> <serviceHostingEnvironment multipleSiteBindingsEnabled="true" aspNetCompatibilityEnabled="true" /> </system.serviceModel> I'm not sure if this affects the streaming function, because I'm using WCF4.0 rest template which config is dependent in Global.asax. One more thing is this, whether I run the service and passing a stream or not, the created file always contain this thing. How could I remove the "NUL" data? Thanks in advance. Edit public bool UploadFile(string filename, Stream fileStream) { try { FileStream fileToupload = new FileStream(filename, FileMode.Create); byte[] bytearray = new byte[10000]; int bytesRead, totalBytesRead = 0; do { bytesRead = fileStream.Read(bytearray, totalBytesRead, bytearray.Length - totalBytesRead); totalBytesRead += bytesRead; } while (bytesRead > 0); fileToupload.Write(bytearray, 0, totalBytesRead); fileToupload.Close(); fileToupload.Dispose(); } catch (Exception ex) { throw new Exception(ex.Message); } return true; }

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  • How to list TODO: in Ant build output

    - by C. Ross
    Related: How to use ant to check for tags (TODO: etc) in java source How can I get ant to list TODO: tags found in my code in the build output when I run it. I would like build failure to be optional (ie: a setting) if they are found. I've tried Checkstyle as suggested in the related post, but it doesn't display the text of the TODO:. IE: [checkstyle] .../src/Game.java:36: warning: Comment matches to-do format 'TODO:'. [checkstyle] .../src/Game.java:41: warning: Comment matches to-do format 'TODO:'. [checkstyle] .../src/GameThread.java:25: warning: Comment matches to-do format 'TODO:'. [checkstyle] .../src/GameThread.java:30: warning: Comment matches to-do format 'TODO:'. [checkstyle] .../src/GameThread.java:44: warning: Comment matches to-do format 'TODO:'.

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  • Ajax method within a added method in jQuery validator

    - by nikospkrk
    Hi, I'm kind of stuck with this pretty simple (I'm sure) jQuery/Javascript issue. Here's the code : jQuery.validator.addMethod("emailExists", function(value, element, param) { var email = value || ''; var valid = 0; $.ajax({ type: "POST", url: param, data: "email=" + email, success: function(msg) { if (msg != '' && msg) { valid = 0; } else { valid = 1; } } }); return valid; }, "* Email address already registered, please login."); This function is called where a user type his email address in a registration form, and everything seems to work perfectly, except that my valid variable returned isn't updated, whereas when I use an alert box it is properly done! It looks like it return the value before the AJAX is done, any idea? Cheers, Nicolas.

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  • Recursive TreeView in C# ASP.NET

    - by waqasahmed
    I have an object of type list from which I wish to use to populate a treeview in asp.net c#. Each object item has: id | Name | ParentId so for example: id | Name | ParentId 1 | Alice | 0 2 | Bob | 1 3 | Charlie | 1 4 | David | 2 In the above example, the parent would be Alice having two children Bob and Charlie. David is the child of Bob. I have had many problems trying to dynamically populate the treeview recursively in c# ASP.NET Does any one have a simple solution? Btw: you can use People.Id, People.Name and People.ParentId to access the members since it is an object belonging to list. I can post you my code so far (many attempts made) but not sure how useful it will be.

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  • jsf output text with fn substring

    - by user2361862
    I want to format a date in jsf which is xmlgregoriancalendar type. I've come across post which say I need custom converter. Does anybody found solution which does not require custom date converter. I was trying following but I gives me error saying... Element type "h:outputText" must be followed by either attribute specifications, "" or "/". This is what I tried on jsf <h:outputText value="#{fn:substringBefore(aClip.lastTransmittedDate,"T")}"> <f:convertDateTime pattern="dd.MM.yyyy" /> </h:outputText> Can anybody point out the explain the error I'm getting?

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  • Getting HTTP 406 when trying to test facebooker application with cucumber

    - by Waseem
    I am trying to test facebook api calls with cucumber. Here is the code. # app/controller/facebook_users_controller.rb class FacebookUsersController < ApplicationController def create fb_user = facebook_session.user user = User.new(:facebook_uid => fb_user.uid, :facebook_session_key => facebook_session.session_key respond_to do |format| if user.save format.json { render :json => { :status => 'ok' }.to_json } end end end end # features/steps/facebook_connect_step.rb Given /^I am a facebook connected user$/ do mock_session = Facebooker::MockSession.create post('/facebook_user.json') puts response.code end When I run the cucumber step for above step definition, I get a response code of 406 instead of 200. This happens in the cucumber test environment only and not in the browser(development/production).

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  • How to implement a left outer join in the Entity Framework.

    - by user206736
    I have the following SQL query:- select distinct * from dbo.Profiles profiles left join ProfileSettings pSet on pSet.ProfileKey = profiles.ProfileKey left join PlatformIdentities pId on pId.ProfileKey = profiles.Profilekey I need to convert it to a LinqToEntities expression. I have tried the following:- from profiles in _dbContext.ProfileSet let leftOuter = (from pSet in _dbContext.ProfileSettingSet select new { pSet.isInternal }).FirstOrDefault() select new { profiles.ProfileKey, Internal = leftOuter.isInternal, profiles.FirstName, profiles.LastName, profiles.EmailAddress, profiles.DateCreated, profiles.LastLoggedIn, }; The above query works fine because I haven't considered the third table "PlatformIdentities". Single left outer join works with what I have done above. How do I include PlatformIdentities (the 3rd table) ? I basically want to translate the SQL query I specified at the beginning of this post (which gives me exactly what I need) in to LinqToEntities. Thanks

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  • Stop loading detail grid at page load.

    - by pirzada
    How can I stop DetailGrid from not loading at page load. Because I have button in master grid to load Detail Grid. Below is code for Detail Grid. jQuery().ready(function () { jQuery("#list10_d").jqGrid({ height: 100, url: '/JQSandbox/MyFullSubGridData?id=0', datatype: "json", mtype: 'POST', colNames: ['Index', 'Name', 'Department', 'Hire Date', 'Supervisor'], colModel: [ { name: 'employeeID', index: 'employeeID', width: 10 }, { width: 30 }, { name: 'employeeDepartment', index: 'employeeDepartment', width: 30 }, { name: 'employeeHiredate', index: 'employeeHiredate', width: 40, sortable: false }, { name: 'employeeSup', index: 'employeeSup', formatter: 'checkbox', align: 'center', width: 30, search: false } ], loadtext: "", loadui: "block", width: 500, rowNum: 5, rowList: [5, 10, 20], pager: '#pager10_d', sortname: 'employeeID', viewrecords: true, sortorder: "asc", multiselect: true, caption: "Detail Grid: 1" }).navGrid('#pager10_d', { add: false, edit: false, del: false }); });

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  • jQuery.ajax success callback function not executed

    - by Frank Michael Kraft
    I have a JavaScript Ajax call (jQuery.ajax), that does not execute the success callback function. $.ajax({ url: target, contentType: 'application/json; charset=utf-8', type: 'POST', // type: 'GET', dataType: 'jsonp', error: function (xhr, status) { alert(status); }, success: function (result) { alert("Callback done!"); // grid.dataBind(result.results); // grid.dataBind(result); } }); I see in firebug, that the request is posted and the correct result in terms of the json is returned as expected. What is wrong?

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  • Resize a WPF window, but maintain proportions?

    - by rathkopf
    I have a user resizable WPF Window that I want to constrain the resizing so the aspect ratio of the window stays constant. Ideally I would like to constrain mouse location when the window is being resized by dragging a corner to positions that maintain the proper aspect ration. If an edge is resized with the mouse, the other dimension should change at the same time. Is there a simple way to do this or a good on-line example that anyone knows of? If no better solutions come up, I'll post what I've done after I've refined it a bit.

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  • URGENT: How to force a postback with asp.net and C#

    - by ErnieStings
    I have a demo scheduled with a client and i need a quick and dirty fix for now. I will find a more appropriate work around tomorrow but for the time being i need a way to force a post back, or refresh the page. i tried: Response.Redirect(""); but it brings me to a page that says "Object moved to here". 'here' is a hyperlink that brings me to the page with desired results but i wish to bypass this message. Any ideas. This is very urgent. Any help would be much appeciated Thanks, shawn

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  • Figuring out if overflow:auto would have been triggered on a div

    - by jerrygarciuh
    Hi folks, // Major edit, sorry in bed with back pain, screwed up post One of the ad agencies I code for had me set up an alternate scrolling solution because you know how designers hate things that just work but aren't beautiful. The scrolling solution is applied to divs with overflow:hidden and uses jQuery's scrollTo(). So, this is married in places to their CMS. What I have not been able to sort yet is how to hide the scrolling UI when overflow:auto would not have been triggered by the CMS content. The divs have set heights and widths. Can i detect hidden content? Or measure the div contents' height? Any ideas? TIA JG

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  • Problem with From field in contact form and mail() function

    - by Matthew
    I've got a contact form with 3 fields and a textarea... I use jQuery to validate it and then php to send emails. This contact form works fine but, when I receive an email, From field isn't correct. I'd like to want that From field shows text typed in the Name field of the contact form. Now I get a From field like this: <[email protected]> For example, if an user types "Matthew" in the name field, I'd like to want that this word "Matthew" appears in the From field. This is my code (XHTML, jQuery, PHP): <div id="contact"> <h3 id="formHeader">Send Us a Message!</h3> <form id="contactForm" method="post" action=""> <div id="risposta"></div> <!-- End Risposta Div --> <span>Name:</span> <input type="text" id="formName" value="" /><br /> <span>E-mail:</span> <input type="text" id="formEmail" value="" /><br /> <span>Subject:</span> <input type="text" id="formSubject" value="" /><br /> <span>Message:</span> <textarea id="formMessage" rows="9" cols="20"></textarea><br /> <input type="submit" id="formSend" value="Send" /> </form> </div> <script type="text/javascript"> $(document).ready(function(){ $("#formSend").click(function(){ var valid = ''; var nome = $("#formName").val(); var mail = $("#formEmail").val(); var oggetto = $("#formSubject").val(); var messaggio = $("#formMessage").val(); if (nome.length<1) { valid += '<span>Name field empty.</span><br />'; } if (!mail.match(/^([a-z0-9._-]+@[a-z0-9._-]+\.[a-z]{2,4}$)/i)) { valid += '<span>Email not valid or empty field.</span><br />'; } if (oggetto.length<1) { valid += '<span>Subject field empty.</span><br />'; } if (valid!='') { $("#risposta").fadeIn("slow"); $("#risposta").html("<span><b>Error:</b></span><br />"+valid); $("#risposta").css("background-color","#ffc0c0"); } else { var datastr ='nome=' + nome + '&mail=' + mail + '&oggetto=' + oggetto + '&messaggio=' + encodeURIComponent(messaggio); $("#risposta").css("display", "block"); $("#risposta").css("background-color","#FFFFA0"); $("#risposta").html("<span>Sending message...</span>"); $("#risposta").fadeIn("slow"); setTimeout("send('"+datastr+"')",2000); } return false; }); }); function send(datastr){ $.ajax({ type: "POST", url: "contactForm.php", data: datastr, cache: false, success: function(html) { $("#risposta").fadeIn("slow"); $("#risposta").html('<span>Message successfully sent.</span>'); $("#risposta").css("background-color","#e1ffc0"); setTimeout('$("#risposta").fadeOut("slow")',2000); } }); } </script> <?php $mail = $_POST['mail']; $nome = $_POST['nome']; $oggetto = $_POST['oggetto']; $text = $_POST['messaggio']; $ip = $_SERVER['REMOTE_ADDR']; $to = "[email protected]"; $message = $text."<br /><br />IP: ".$ip."<br />"; $headers = "From: $nome \n"; $headers .= "Reply-To: $mail \n"; $headers .= "MIME-Version: 1.0 \n"; $headers .= "Content-Type: text/html; charset=UTF-8 \n"; mail($to, $oggetto, $message, $headers); ?>

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  • VS2010 method comment block pretty format.

    - by camelCase
    I have just installed the lastest RC of VS2010, which for me represents a shift from VS2008. A new comment formatting feature that I was looking forward to appears to be missing. About 6 months ago I read a Scott Gu blog post that mentioned a new VS2010 feature that would format /// style method comment blocks into more readable formatted regions inline with other code. The Scott Gu blog did not provide a screen shot but I was expecting the VS2010 editor to remove the XML tags from the /// method comment block and render just the essential text comment. Was this feature pulled during the Beta, or is there an option switch urking somewhere?

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  • Silverlight and Active Directory

    - by Refracted Paladin
    I am planning to familiarize(read teach) myself with Silverlight by building an in-house app for managing our employees. I, obviously, would need this to interact with Active Directory on some level. What are my options? Has anyone tried this before? I am currently going to explore using Services(WCF???) to do the AD interaction portion? Thoughts? There is also this SO Post on using PowerShell to interact with AD. Maybe that is a possibility? Thanks,

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  • Connection problems - Celery/Django

    - by RadiantHex
    Hi folks, long night... can't get my second Celery/RabbitMQ setup run to work. step 1 sudo rabbitmq-server runs: ok! step 2 python manage.py celeryd -l info error: [2010-12-28 03:38:24,690: ERROR/MainProcess] CarrotListener: Connection Error: Socket closed. Trying again in 28 seconds... I have definitely: added rabbitmq user and vhost updated the Django setings.py Edit: I think it might have to with installing from a .deb instead of apt-get. After uninstalling the deb and installing the apt-get version I get this: invoke-rc.d: initscript rabbitmq-server, action "start" failed. dpkg: error processing rabbitmq-server (--configure): subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: rabbitmq-server E: Sub-process /usr/bin/dpkg returned an error code (1) Any ideas on how I could debug this? :|

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  • MCTS exam 70-526 vs 70-505

    - by doug.stanhope
    I guess this should be CW but I don't know how to post a question as such, so if anyone can help out... What I would like to know is the following: I have taken exam 70-526 a couple of years ago and I still have the training kit laying around. Now my boss wants me to prepare for the upgrade exam 70-505. Do you know if both exams are similar or otherwise put: do you think I have to get the new training kit to prepare for this exam or will the old one do? I haven't done a whole lot of Windows Forms programming these past few years so I'll have to re-learn much of what's in the book.

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  • github url style

    - by Alex Le
    Hi all, I wanted to have users within my website to have their own URL like http://mysite.com/username (similar to GitHub, e.g. my account is http:// github. com/sr3d). This would help with SEO since every profile is under the same domain, as apposed to the sub-domain approach. My site is running on Rails and Nginx/Passenger. Currently I have a solution using a bunch of rewrite in the nginx.conf file, and hard-coded controller names (with namespace support as well). I can share include the nginx.conf here if you guys want to take a look. I wanted to know if there's a better way of making the URL pretty like that. (If you suggest a better place to post this question then please let me know) Cheers, Alex

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  • will paginate, nested routes, ruby, rails

    - by Sam
    I'm trying to get will paginate to link to my nested route instead of the regular posts variable. I know I'm supposed to pass some params to paginate but I don't know how to pass them. Basically there is an array stored in @posts and the other param paginate has access to is category_id. The nested route is /category/1/posts but hitting next and previous on will paginate returns a url like this posts?page=1&category_id=7. <%= will_paginate @most_recent_posts "What do I do here?" %> This is the result of Yannis's answer: In your controller you can do: @posts = @category.posts.paginate And in your view: <%= will_paginate(@post) %> Doing this comes up with the following URL posts?page=2&post_category_id=athlete_management routes.rb #there are more routes but these are the relevant ones map.resources :posts map.resources :post_categories, :has_many => :posts solution map.resources :post_categories do |post_category| post_category.resources :posts end map.resources :posts Had to declare the resource after the block Thanks stephen!

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  • How to push a new local branch to remote repo and track it too [git]

    - by Roni Yaniv
    I tried looking for a an answer to this, but couldn't find any which address this specific need. Which is weird. I want to be able to do the following: create a local branch based on some other (remote or local) branch (via git branch or git checkout -b) push the local branch to remote repo (publish), but make it trackable so git pull and git push will work immediately. How do I do that? EDIT: I know about --set-upstream in git 1.7, but that is a post-creation action. i want to find a way to make a similar change when pushing the branch to the remote repo.

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  • htaccess: how to differentiate document requests from variable requests? ... also, how to allow for

    - by Lucas
    hello, my last post was met by smarmy, unhelpful "answers" (comments), so i'll get right to it: if i have and htaccess file like so: RewriteEngine on RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME}.php -f RewriteRule ^(.*)$ $1.php RewriteCond %{REQUEST_FILENAME} -f RewriteRule ^ - [L] RewriteRule ^([^/]+)/([^/]+)$ /index.php?page=$1&subject=$2 RewriteRule ^([^/]+)$ /index.php?page=$1 [L] how can i allow for other url variable names and values to be handled... say for instance i want to add extra unexpected url vars to this scenario /page/subject?urlvar1=value1&urlvar2=value2 and get the page i want without creating unexpected results? any real help is greatly appreciated. thanks!

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  • Architecture choice about representation of collections in Business Objects

    - by Rajarshi
    I have made certain choices in my architecture which I request the community to review and comment. I am breaking up the post in smaller sections to make it easier to understand the context and then suggest/comment. I am sorry that the post is long, but is required to explain the context. What am I building A typical business application where there are application users, security roles, business operation/action rights based on roles and several business modules like Stock Receive, Stock Transfer, Sale Order, Sale Invoice, Sale Return, Stock Audit etc. and several reports. The application is a WinForm application since it has a lot of rich and responsive UI requirements and has to operate in disconnected mode (with a local SQL Server), most of the time. What have I done I have built a framework - nothing to boast about, but just a set of libraries that serves the repetative requirements of my application, e.g. authentication, role based authorization, data access, validation, exception handling, logging, change status tracking, presentation model compliance and reasonable loose coupling between components. No, I have not written everything from scratch, you can say I have consolidated many things together like some concepts from CSLA, Martin Fowler for Presentation Model, blocks from Enterprise Library, Unity etc. to build a set of libraries that will help my developers be productive quickly without having to look up Google for many of the technical requirements. I have tried to keep the framework generic so that it can be used in typical business applications and also tried to follow some best practices that will support the same Business Objects to be used in an ASP.NET MVC environment also. My present architecture serves my objectives well, and have built several modules (on WinForm) without much trouble. The architecture also lent itself well to build some usable prototype on ASP.NET MVC with the same set of business objects, without changing a single line of code. My Dilemma I have used Custom Business Objects since that gives me a clearer OOP representation of the problem scope in my solution scope, and helps me visualize my entire solution as collection of objects with data and behavior rather than having a set of relational data (DataSet) and implement behaviours (business logic, validation) etc. separately. With rich databinding support in .NET 2.0 binding Custom Business Objects to UI was a breeze. Now while building my business objects, I am still in a dilemma about representation of collections in business objects. Currently I am using DataSets to represent collections while I have seen many suggestions to implement custom collections. For example, in my vision, a typical Sale Invoice Object will contain 'Sales Invoice Items' as a collection. Now theoritically, I can accept that the each 'Sales Invoice Item' should have its own behavior along with their data (ItemCode, Name, Qty, Price etc.) but typically managing of Sale Invoice Items in a Sale Invoice is handled by the Sale Invoice Object itself, e.g. adding/removing Items from collection. Additionally, we can also put business logic/rules for the Sales Invoice Items like "Qty should not be greater than the ordered qty", "Price should be max 10% above the price in Sale Order" etc. in the Sale Invoice object itself. With that kind of a vision, I felt that most business object child collections can be managed by the parent itself, including add/remove from collection as well and implementing business logic for the collection items, hence the collection items hold nothing but data. Additionally, typical collections are represented in UI in Grids, where ability to support DataBinding becomes very important for any collection. Implementing a custom collection, in that case would also mean, I have to implement robust DataBinding support as well, for the collection, which is of course time consuming. Now, considering child collection behaviors are implemented in the parent and the need for DataBinding of child collections, I chose DataSet to represent any child collection in my business objects. In the above example of Sale Invoice I will have 'Invoice Number', 'Date', 'Customer' etc. as attributes of the 'Sale Invoice' but 'InvoiceItems' as a DataSet. Of course, when I say DataSet, it is not a vanilla dataset but an extended DataSet that supports business rule validation and the same role based security model of my framework to allow/deny any business operation to rows/columns of the DataSet, automatically. This approach has allowed easier collection management and databinding in my business objects and my developers are able to deliver modules rapidly. Questions Do you feel that the approach is reasonable? Do you see any shortcomings of this approach? I am recently thinking of using 'Typed DataSets' as child collections, for easier representation in code, that will allow me to write 'currentInvoice.InvoiceItems' (for the DataTable) and 'invoiceItem.ProductCode' or 'invoiceItem.Qty', instead of 'drow["ProductCode"].ToString()' or '(int)drow["Qty"]' etc. Does this choice have any demerits? Thank you if you have read so far and a salute if you still have the Energy to answer.

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