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• Silverlight 4 Drag and Drop Treeview

  - by Rich

  Does anyone have an example for any of the following scenarios. Given, these are all dynamically populated trees. Not using a Heirarchal data template, but by iterating through object collections manually and appending children at the appropriate level. Treeview1 has 3 levels, but items can only be reordered within their level. So, lets say we have Drives, Folders and Files. Drives can be rearranged in an order, but not put into a Folder. When navigated down one level in a drive, the individual folders can be reordered, but not dragged between drives.. and same with files, only can be reordered, but not moved to a different folder or drive I have 2 treeviews, Treeview1 is the same as #1 above and Treeview2 is like a picklist of available items. A user can drag an item from Treeview2 to Treeview1, but it can only be placed at Treeview1's File Level. The dragged item cannot be a child of a file, or placed at the folder level, nor placed at the drive level. Also, how to handle the Above, On Top, or Below an item. I have yet to come across these examples.

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• Get Mechanize to handle cookies from an arbitrary POST (to log into a website programmatically)

  - by Horace Loeb

  I want to log into https://www.t-mobile.com/ programmatically. My first idea was to use Mechanize to submit the login form: However, it turns out that this isn't even a real form. Instead, when you click "Log in" some javascript grabs the values of the fields, creates a new form dynamically, and submits it. "Log in" button HTML: <button onclick="handleLogin(); return false;" class="btnBlue" id="myTMobile-login"><span>Log in</span></button> The handleLogin() function: function handleLogin() { if (ValidateMsisdnPassword()) { // client-side form validation logic var a = document.createElement("FORM"); a.name = "form1"; a.method = "POST"; a.action = mytmoUrl; // defined elsewhere as https://my.t-mobile.com/Login/LoginController.aspx var c = document.createElement("INPUT"); c.type = "HIDDEN"; c.value = document.getElementById("myTMobile-phone").value; // the value of the phone number input field c.name = "txtMSISDN"; a.appendChild(c); var b = document.createElement("INPUT"); b.type = "HIDDEN"; b.value = document.getElementById("myTMobile-password").value; // the value of the password input field b.name = "txtPassword"; a.appendChild(b); document.body.appendChild(a); a.submit(); return true } else { return false } } I could simulate this form submission by POSTing the form data to https://my.t-mobile.com/Login/LoginController.aspx with Net::HTTP#post_form, but I don't know how to get the resultant cookie into Mechanize so I can continue to scrape the UI available when I'm logged in. Any ideas?

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• Jquery star rating plugin and cancel rating button

  - by Roger

  Using this plugin: http://www.fyneworks.com/jquery/star-rating/#tab-Testing I have a simple callback function that picks up the id from the radio buttons: <input type="radio" class="auto-submit-star {split:2}" id="myid" value="1" /> $('.auto-submit-star').rating({ callback: function(value, link){ alert($(this).attr('id')); } }); This works fine, but if the user clicks on the cancel button, then it can't read the id of it. In the js, I think the cancel button is added dynamically with: control.cancel = $('<div class="rating-cancel"><a title="' + control.cancel + '">' + control.cancelValue + '</a></div>') If I add an id to it like this: control.cancel = $('<div class="rating-cancel"><a id="someid" title="' + control.cancel + '">' + control.cancelValue + '</a></div>') How could I read the id? This would be undefined. I can set a class and use $('.myclass').attr('id') but I will have multiple ratings on one page so I'll need something similar to "this". Or is it possible for the cancel button to pick up the id of the corresponding radio buttons?

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• Delphi - Message loop for Form created in DirectShow filter goes dead

  - by Robert Oschler

  I have a DirectShow filter created with Delphi Pro 6 and the DSPACK direct show library. I'm running under windows XP. I've tried creating the form dynamically when the container class for the DirectFilter has its constructor called, passing NIL into the constructor as the AOwner parameter (TMyForm.Create(nil) and then calling the Form's Show() method. The form does show but then appears to stop receiving windows messages because it never repaints and does not respond to input. As a test I then tried creating my own WndProc() and overriding the Form's WndProc(). My WndProc() did get called once but never again. I'm guessing it's because I'm a DLL and the context that I am running in is not "friendly" to the window message handler for the form; perhaps something to do with the thread that calls it or whatever. If someone could give me a tip on how to solve this or what the proper way to create a persistent window is from the context of a DirectShow filter I'd appreciate it. Note, as I said the window needs to be persistent so I can't create it as a Filter property page. Thanks, Robert

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• How can I pass a html table row into DataTable.net fnAddData

  - by chobo2

  Hi I am using the DataTable.net plugin and I am wondering how can I add dynamically a row to a existing table? http://datatables.net/examples/api/add_row.html I am looking at this example and they have it like this /* Global variable for the DataTables object */ var oTable; /* Global var for counter */ var giCount = 2; $(document).ready(function() { oTable = $('#example').dataTable(); } ); function fnClickAddRow() { oTable.fnAddData( [ giCount+".1", giCount+".2", giCount+".3", giCount+".4" ] ); giCount++; } but I am wondering what happens if I want I have a table row already rendered? Say this is my table. <table border="1"> <tr> <td>row 1, cell 1</td> <td>row 1, cell 2</td> </tr> <tr> <td>row 2, cell 1</td> <td>row 2, cell 2</td> </tr> </table> Now I have this var newRow = '<tr><td>row 3, cell 1</td><td>row 3, cell 2</td></tr>'; How can I add it through addRow? I tried oTable.fnAddData(newRow); but that seems not to work. So I am not sure how to do this.

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• Reduce number of config files to as few as possible

  - by Scott

  For most of my applications I use iBatis.Net for database access/modeling and log4Net for logging. In doing this, I need a number of *.config files for each project. For example, for a simple application I need to have the following *.config files: app.config ([AssemblyName].[Extention].config) [AssemblyName].SqlMap.config [AssemblyName].log4Net.config [AssemblyName].SqlMapProperties.config providers.config When these applications go from DEV to TEST to PRODUCTION environments, the settings contained in these files change depending on the environment. When the number of files get compounded by having 5-10 (or more) supporting executables per project, the work load on the infrastructure team (the ones doing the roll-outs to the different environments) gets rather high. We also have a high risk of one of the config files being missed, or a mistype in the config file. What is the best way to avoid these risks? Should I combine all of the config files into one file? (is that possible with iBatis?) I know that with VisualStudio 2010 they introduce transforms for these config files that allow the developer to setup all the settings for the different environments and then dynamically (depending on the build kicked off) the config files get updated to the correct versions. (VS 2010 - transforms) Thank you for any help that you can provide.

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• How do I add dynamic htmlAttributes to htmlhelper ActionLinks?

  - by camainc

  In my master page I have a top-level menu that is created using ActionLinks: <ul id="topNav"> <li><%=Html.ActionLink("Home", "Index", "Home")%></li> <li><%=Html.ActionLink("News", "Index", "News")%></li> <li><%=Html.ActionLink("Projects", "Index", "Projects")%></li> <li><%=Html.ActionLink("About", "About", "Home")%></li> <li><%=Html.ActionLink("Contact", "Contact", "Home")%></li> <li><%=Html.ActionLink("Photos", "Photos", "Photos")%></li> </ul> I want to dynamically add a class named "current" to the link that the site is currently pointing to. So, for example, when the site is sitting at the home page, the menu link would render like this: <li><a class="current" href="/">Home</a></li> Do I have to overload the ActionLink method to do this, or create an entirely new HtmlHelper, or is there a better way? I'm fairly new to MVC, so I'm not sure what is the correct way to go about this. Thanks in advance.

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• How to select form input based on label inner HTML?

  - by Shane

  I have multiple forms that are dynamically created with different input names and id's. The only thing unique they will have is the inner HTML of the label. Is it possible to select the input via the label inner HTML with jQuery? Here is an example of one of my patient date of birth blocks, there are many and all unique except for innerHTML. <div class="iphorm-element-spacer iphorm-element-spacer-text iphorm_1_8-element-spacer"> <label for="iphorm_081a9e2e6b9c83d70496906bb4671904150cf4b43c0cb1_8">events=Object { mouseover=[1], mouseout=[1]}handle=function()data=Object { InFieldLabels={...}} Patient DOB <span class="iphorm-required">*</span> </label> <div class="iphorm-input-wrap iphorm-input-wrap-text iphorm_1_8-input-wrap"> <input id="iphorm_081a9e2e6b9c83d70496906bb4671904150cf4b43c0cb1_8" class="iphorm-element-text iphorm_1_8" type="text" value="" name="iphorm_1_8">events=Object { focus=[1], blur=[1], keydown=[1], more...}handle=function() </div> <div class="iphorm-errors-wrap iphorm-hidden"> </div> This is in a Wordpress Plugin and because we are building to allow employees to edit their sites (this is actually a Wordpress Network), we do not want to alter the plugin if possible. Note that the label "for" and the input "id" share the same dynamic key, so this might be a way to maybe get the id, but wanted to see if there is a shorter way of doing this.

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• Using the MVVM Light Toolkit to make Blendable applications

  - by Dave

  A while ago, I posted a question regarding switching between a Blend-authored GUI and a Visual Studio-authored one. I got it to work okay by adding my Blend project to my VS2008 project and then changing the Startup Application and recompiling. This would result in two applications that had completely different GUIs, yet used the exact same ViewModel and Model code. I was pretty happy with that. Now that I've learned about the Laurent Bugnion's MVVM Light Toolkit, I would really like to leverage his efforts to make this process of supporting multiple GUIs for the same backend code possible. The question is, does the toolkit facilate this, or am I stuck doing it my previous way? I've watched his video from MIX10 and have read some of the articles about it online. However, I've yet to see something that indicates that there is a clean way to allow a user to either dynamically switch GUIs on the fly by loading a different DLL. There are MVVM templates for VS2008 and Blend 3, but am I supposed to create both types of projects for my application and then reference specific files from my VS2008 solution? UPDATE I re-read some information on Laurent's site, and seemed to have forgotten that the whole point of the template was to allow the same solution to be opened in VS2008 and Blend. So anyhow, with this new perspective it looks like the templates are actually intended to use a single GUI, most likely designed entirely in Blend (with the convenience of debugging through VS2008), and then be able to use two different ViewModels -- one for design-time, and one for runtime. So it seems to me like the answer to my question is that I want to use a combination of my previous solution, along with the MVVM Light Toolkit. The former will allow me to make multiple, distinct GUIs around my core code, while the latter will make designing fancy GUIs in Blend easier with the usage of a design-time ViewModel. Can anyone comment on this?

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• How do I bind one TabControl to the TabItems of another TabControl in WPF?

  - by joebeazelman

  I've defined the following TabControl called TabControl1: <TabControl> <TabItem Header="Cheese"> The Cheese Tab </TabItem> <TabItem Header="Pepperoni"> The Pepperoni Tab </TabItem> <TabItem Header="Mushrooms"> The Mushrooms Tab </TabItem> </TabControl> I've defined another TabControl, TabControl2 which is dynamically loaded from an add-in or plugin: <TabControl> <TabItem Header="Anchovies"> The AnchoviesTab </TabItem> <TabItem Header="Jalepenos"> The Jalepenos Tab </TabItem> <TabItem Header="Rattle Snake"> The Rattle Snake Tab </TabItem> </TabControl> After TabControl1 binds to TabControl2 after the "Cheese" item, TabControl1 should look like this: <TabControl> <TabItem Header="Cheese"> The Cheese Tab </TabItem> <TabItem Header="Anchovies"> The AnchoviesTab </TabItem> <TabItem Header="Jalepenos"> The Jalepenos Tab </TabItem> <TabItem Header="Rattle Snake"> The Rattle Snake Tab </TabItem> <TabItem Header="Pepperoni"> The Pepperoni Tab </TabItem> <TabItem Header="Mushrooms"> The Mushrooms Tab </TabItem> </TabControl>

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• Any way to identify a redirect when using jQuery's $.ajax() or $.getScript() methods?

  - by Bungle

  Within my company's online application, we've set up a JSONP-based API that returns some data that is used by a bookmarklet I'm developing. Here is a quick test page I set up that hits the API URL using jQuery's $.ajax() method: http://troy.onespot.com/static/3915/index.html If you look at the requests using Firebug's "Net" tab (or the like), you'll see that what's happening is that the URL is requested successfully, but since our app redirects any unauthorized users to a login page, the login page is also requested by the browser and seemingly interpreted as JavaScript. This inevitably causes an exception since the login page is HTML, not JavaScript. Basically, I'm looking for any sort of hook to determine when the request results in a redirect - some way to determine if the URL resolved to a JSONP response (which will execute a method I've predefined in the bookmarklet script) or if it resulted in a redirect. I tried wrapping the $.ajax() method in a try {} catch(e) {} block, but that doesn't trap the exception, I'm assuming because the requests were successful, just not the parsing of the login page as JavaScript. Is there anywhere I could use a try {} catch(e) {} block, or any property of $.ajax() that might allow me to hone in on the exception or otherwise determine that I've been redirected? I actually doubt this is possible, since $.getScript() (or the equivalent setup of $.ajax()) just loads a script dynamically, and can't inspect the response headers since it's cross-domain and not truly AJAX: http://api.jquery.com/jQuery.getScript/ My alternative would be to just fire off the $.ajax() for a period of time until I either get the JSONP callback or don't, and in the latter case, assume the user is not logged in and prompt them to do so. I don't like that method, though, since it would result in a lot of unnecessary requests to the app server, and would also pile up the JavaScript exceptions in the meantime. Thanks for any suggestions!

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• page wide bread crumb bar as at apple.com/store

  - by punkish

  I want to build a (don't know what to call it other than) bread crumb bar at the top of the page, kinda like at http://store.apple.com/us/browse/home/shop_mac/software, y'know, at the top of the page, the horizontal, light grey bar that looks like so [home icon] | Shop Mac | Mac Software Help | Account | Cart Actually, I've got that bar working, with a curved, square left edge, the intermediate chevrons, and the curved, square right edge. So, my bar looks like so [ Home > Foo > Bar > Baz ] I have little graphics fragments that make up the [ and the and the ] and the middle parts. The only problem is, I want the right edge to be at the right edge of my page. So, the above bar should look like so [ Home > Foo > Bar > Baz ] I want to have a variable number of entries in my bread crumb bar... so, I could have "Home, Foo, Bar, Baz" or I could have "Home, Foo" or "Home, Foo, Bar, Baz, Qux" and so on. In other words, I want the right edge of my bar to be dynamically long enough to extend to the edge of my web page. Suggestions?

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• Rails 3.2 Ajax Update Div when Text Field Populated

  - by ctilley79

  In the end I would like a text field that passes a client_id to the partial. I would like to do this asynchronously so the shipment_products partial would dynamically change when the textfield value was updated. What is the best way to do this? In index.html.erb <!-- Text Field Here--> <div id="available_products"> <%= render "shipment_products" %> </div> In _shipment_products.html.erb <div id="shipment_products_container"> <h3>Assign Products to Ship<\h3> <ul class="shipment_products" id="shipment_products"> <% Product.by_client(client_id).each do |product|%> <!-- TextField value passed here --> <%= content_tag_for :li, product, :value => product.id do %> <%= hidden_field_tag("shipment[product_ids][]", product.id) %> <%= product.product_name %> <% end %> <% end %> <\ul> </div> This is similar to what I want in the end.

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• Variant datatype library for C

  - by Joey Adams

  Is there a decent open-source C library for storing and manipulating dynamically-typed variables (a.k.a. variants)? I'm primarily interested in atomic values (int8, int16, int32, uint, strings, blobs, etc.), while JSON-style arrays and objects as well as custom objects would also be nice. A major case where such a library would be useful is in working with SQL databases. The most obvious feature of such a library would be a single type for all supported values, e.g.: struct Variant { enum Type type; union { int8_t int8_; int16_t int16_; // ... }; }; Other features might include converting Variant objects to/from C structures (using a binding table), converting values to/from strings, and integration with an existing database library such as SQLite. Note: I do not believe this is question is a duplicate of http://stackoverflow.com/questions/649649/any-library-for-generic-datatypes-in-c , which refers to "queues, trees, maps, lists". What I'm talking about focuses more on making working with SQL databases roughly as smooth as working with them in interpreted languages.

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• Deriving an HTMLElement Object from jQuery Object

  - by Jasconius

  I'm doing a fairly exhaustive series of DOM manipulations where a few elements (specifically form elements) have some events. I am dynamically creating (actually cloning from a source element) several boxes and assigning a change() event to them. The change event executes, and within the context of the event, "this" is the HTML Element Object. What I need to do at this point however is determine a contact for this HTML Element Object. I have these objects stored already as jQuery entities in assorted arrays, but obviously [HTMLElement Object] != [Object Object] And the trick is that I cannot cast $(this) and make a valid comparison since that would create a new object and the pointer would be different. So... I've been banging my head against this for a while. In the past I've been able to circumvent this problem by doing an innerHTML comparison, but in this case the objects I am comparing are 100% identical, just there's lots of them. Therefore I need a solid comparison. This would be easy if I could somehow derive the HTMLElement object from my originating jQuery object. Thoughts, other ideas? Help. :(

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• Themeing and Master Pages

  - by Jeff

  I have the requirement to support themeing of my site's pages. The way I am doing this is by dynamically choosing a master page based on the current theme. I have setup a directory structure like so /shared/masterpages/theme1/Master1.master /shared/masterpages/theme1/Master2.master /shared/masterpages/theme1/Master3.master /shared/masterpages/theme2/Master1.master /shared/masterpages/theme2/Master2.master /shared/masterpages/theme2/Master3.master And I am still using the page directive in the view <%@ Page Title="" Language="C#" MasterPageFile="~/Views/shared/masterpages/theme1/Master1.Master"%> I would still like to leverage the view's MasterPageFile property and just change the theme directory. I can only think of three ways to do this none of them which sound great. Create a custom BaseView class that uses OnPreInit to change the theme like this Create some xml file or database table that links each view to a master page file and then set this in the controller. Build some tool that reads all the views and parses them for their masterpagefile, (similar to 2 but could be done at run time potentially.) Option 1 seems the best option to me so far. Does anyone else have any thoughts on how to do this?

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• Auto width on tables

  - by Hulk

  A html table cols and rows are generated dynamically, i.e, for the first instance it could be two rows and there columns. and next time it could be two rows and 10 columns My question is how to adjust the with automatically of the table so that the table always appears 100% in the page adjusting the coulmn size and row size <table> <tr><td></td><td></td><td></td></tr> <tr><td></td><td></td><td></td></tr> </table> <table> <tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr> <tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr> <tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr> </table> Thanks..

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• how to find the height of html content

  - by ganapati hegde

  Hi, I am trying to display 10 html pages as a single document,with 10 chapters. I am using Webkitgtk+ engine to render the HTML pages. I am getting the content of each html files and concatenating all of them to create a single 'char *content' and using webkit_web_view_load_html_string(WebKitWebView *web_view, const gchar *content, const gchar *base_uri); this function to load all the HTML files, as a document. Now i am trying to build a 'table of contents(toc)' for this document, which displays all the chapter names in order. My requirement is, when i click on a particular chapter in toc, the document should scroll to that point. For that i need to know height of each chapter ( height of each html file content). The point to be noted here is, the width of the document can changed and as HTML is reflowable, as width increases height decreases and vice-versa. So each time when height changes i need to find out the current height of each HTML page(or chapter) and hence calculate the distance to be scrolled. How can i find out the height of content of HTML page dynamically ? Thank you for the answer....

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• Android: How to get a custom view to redraw partially?

  - by Peterdk

  I have a custom view that fills my entire screen. (A piano keyboard) When a user touches the key, it would cause a invalidate() to be called and the whole keyboard gets redrawn to show the new state with a touched key. Currently the view is very simple, but I plan to add a bit more nice graphics. Since the whole keyboard is dynamically rendered this would make redrawing the entire keyboard more expensive. So I thought, let's look into partial redrawing. Now I call invalidate(Rect dirty) with the correct dirty region. I set my onDraw(Canvas canvas) method to only draw the keys in the dirty region if I do indeed want a partial redraw. This results in those keys being drawn, but the rest of the keyboard is totally black/not drawn at all. Am I wrong in expecting that calling invalidate(Rect dirty) would "cache" the current canvas, and only "allows" drawing in the dirty region? Is there any way I can achieve what I want? (A way to "cache" the canvas and only redraw the dirty area?"

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• Issue with IHttpHandler and relative URLs

  - by vtortola

  Hi, I've developed a IHttpHandler class and I've configured it as verb="*" path="*", so I'm handling all the request with it in an attempt of create my own REST implementation for a test web site that generates the html dynamically. So, when a request for a .css file arrives, I've to do something like context.Response.WriteFile(Server.MapPath(url)) ... same for pictures and so on, I have to response everything myself. My main issue, is when I put relative URLs in the anchors; for example, I have main page with a link like this <a href="page1">Go to Page 1</a> , and in Page 1 I have another link <a href="page2">Go to Page 2</a>. Page 1 and 2 are supposed to be at the same level (http://host/page1 and http://host/page2, but when I click in Go to Page 2, I got this url in the handler: ~/page1/~/page2 ... what is a pain, because I have to do an url = url.SubString(url.LastIndexOf('~')) for clean it, although I feel that there is nothing wrong and this behavior is totally normal. Right now, I can cope with it, but I think that in the future this is gonna bring me some headache. I've tried to set all the links with absolute URLs using the information of context.Request.Url, but it's also a pain :D, so I'd like to know if there is a nicer way to do these kind of things. Don't hesitate in giving me pretty obvious responses because I'm pretty new in web development and probably I'm skipping something basic about URLs, Http and so on. Thanks in advance and kind regards.

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• How can a silverlight app download and play an mp3 file from a URL?

  - by Edward Tanguay

  I have a small Silverlight app which downloads all of the images and text it needs from a URL, like this: if (dataItem.Kind == DataItemKind.BitmapImage) { WebClient webClientBitmapImageLoader = new WebClient(); webClientBitmapImageLoader.OpenReadCompleted += new OpenReadCompletedEventHandler(webClientBitmapImageLoader_OpenReadCompleted); webClientBitmapImageLoader.OpenReadAsync(new Uri(dataItem.SourceUri, UriKind.Absolute), dataItem); } else if (dataItem.Kind == DataItemKind.TextFile) { WebClient webClientTextFileLoader = new WebClient(); webClientTextFileLoader.DownloadStringCompleted += new DownloadStringCompletedEventHandler(webClientTextFileLoader_DownloadStringCompleted); webClientTextFileLoader.DownloadStringAsync(new Uri(dataItem.SourceUri, UriKind.Absolute), dataItem); } and: void webClientBitmapImageLoader_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e) { BitmapImage bitmapImage = new BitmapImage(); bitmapImage.SetSource(e.Result); DataItem dataItem = e.UserState as DataItem; CompleteItemLoadedProcess(dataItem, bitmapImage); } void webClientTextFileLoader_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e) { DataItem dataItem = e.UserState as DataItem; string textFileContent = e.Result.ForceWindowLineBreaks(); CompleteItemLoadedProcess(dataItem, textFileContent); } Each of the images and text files are then put in a dictionary so that the application has access to them at any time. This works well. Now I want to do the same with mp3 files, but all information I find on the web about playing mp3 files in Silverlight shows how to embed them in the .xap file, which I don't want to do since I wouldn't be able to download them dynamically as I do above. How can I download and play mp3 files in Silverlight like I download and show images and text?

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• Retrieve data from .dat file.

  - by Zach

  We have an application which requires us to read data from a file (.dat) dynamically using deserialization. We are actually getting first object and it throws null pointer exception when we are accessing other objects using a "for" loop. File file=null; FileOutputStream fos=null; BufferedOutputStream bos=null; ObjectOutputStream oos=null; try{ file=new File("account4.dat"); fos=new FileOutputStream(file,true); bos=new BufferedOutputStream(fos); oos=new ObjectOutputStream(bos); oos.writeObject(m); System.out.println("object serialized"); amlist=new MemberAccountList(); oos.close(); } catch(Exception ex){ ex.printStackTrace(); } Reading objects: try{ MemberAccount m1; file=new File("account4.dat");//add your code here fis=new FileInputStream(file); bis=new BufferedInputStream(fis); ois=new ObjectInputStream(bis); System.out.println(ois.readObject()); while(ois.readObject()!=null){ m1=(MemberAccount)ois.readObject(); System.out.println(m1.toString()); }/mList.addElement(m1); // Here we have the issue throwing null pointer exception Enumeration elist=mList.elements(); while(elist.hasMoreElements()){ obj=elist.nextElement(); System.out.println(obj.toString()); }/ } catch(ClassNotFoundException e){ } catch(EOFException e){ System.out.println("end"); } catch(Exception ex){ ex.printStackTrace(); }

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• An annoying printing issue with Crystal Reports 2008

  - by Xience

  A little background: I have an extremely annoying printing issue with crystal reports. My environment is crystal reports 2008 SP2 on Windows 7 (64bit), Visual studio 2008 and .net framework 3.5 with all the latest updates for everything. The report is designed basically to render a small shelf label of the size (40mm width and 20mm height). In crystal when I set the page size to the above mentioned values and set orientation to portrait and take a preview, everything is displayed as i expect it to be and issuing a print command, it prints absolutely correct. The problem: The problem comes when i print this report from my program (in vb.net), dynamically setting data to some text fields, the result is that crystal somehow changes the print orientation, NOT the paper orientation as in portrait or landscape. Instead of printing from top left towards the bottom right, it rotates the whole output at 90 degrees to the left and reduces everything so small that it is barely visible, although it prints everything out. I have tested it on Intermec PF8t and Zebra GK420d label printers and a whole bunch of laser printers, but with the above stated page settings the output is always the same. Another strange thing that i noticed while experimenting with page sizes if i switch to landscape mode, the print out is correct in its font sizes and positions but then the text gets truncated due to overflowing the page size. Can anyone help me with this. Does crystal has anything like its own print drivers or something. I have tried to ensure to the best of my abilities that it is not a printer driver problem.

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• django shopping cart as a beginner

  - by Jacques Knie

  Hi, i'm quite new to django and trying to add a shopping cart to a simple webshop. What I need is a simple cart that can be filled and presents its content, which is then sent to the vendor via email. So Satchmo might be too big for this task. Therefore i chose django-cart (http://code.google.com/p/django-cart/) which causes some problems now. 1. Is django-cart the right thing? Or are there any better approaches to this task? 2. As I am a beginner even django-cart makes me struggle. I used the view and the template of the django-cart-website, but writing a form that can be used to add products to the cart took me hours. I probably need help in understanding the general layout of a shopping cart and its integration into a website. 3. Two more specific questions: Is it possible to dynamically populate a formfield in a template (e.g. with {{ object.id }})? Is django-cart able to change (update) the contents of a cart? I hope it's not too many questions at once. Thanks in advance Jacques

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• is delete p where p is a pointer to array a memory leak ?

  - by Eli

  following a discussion in a software meeting I setup to find out if deleting an dynamically allocated primitive array with plain delete will cause a memory leak. I have written this tiny program and compiled with visual studio 2008 running on windows XP: #include "stdafx.h" #include "Windows.h" const unsigned long BLOCK_SIZE = 1024*100000; int _tmain() { for (unsigned int i =0; i < 1024*1000; i++) { int* p = new int[1024*100000]; for (int j =0;j<BLOCK_SIZE;j++) p[j]= j % 2; Sleep(1000); delete p; } } I than monitored the memory consumption of my application using task manager, surprisingly the memory was allocated and freed correctly, allocated memory did not steadily increase as was expected I've modified my test program to allocate a non primitive type array : #include "stdafx.h" #include "Windows.h" struct aStruct { aStruct() : i(1), j(0) {} int i; char j; } NonePrimitive; const unsigned long BLOCK_SIZE = 1024*100000; int _tmain() { for (unsigned int i =0; i < 1024*100000; i++) { aStruct* p = new aStruct[1024*100000]; Sleep(1000); delete p; } } after running for for 10 minutes there was no meaningful increase in memory I compiled the project with warning level 4 and got no warnings. is it possible that the visual studio run time keep track of the allocated objects types so there is no different between delete and delete[] in that environment ?

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