Develop Reference

Facebook Like/Send buttons inconsistent across site pages

I have implemented the Facebook Like and Send button plugin. Look I think its fair to say that this should be fairly straightforward and having stepped though the process I was very happy that this was the case.
I am having an issue now that is causing me some difficulty resolving.
The issue is around an inconsistent display and functionality of the plugin. It works perfectly for some of our site pages and doesnt work at all for others.
On the pages where the plugin does not work the Send Button doesnt appear and when the Like Button is clicked it opens the Like Dialog very briefly and immediately closes it without any Like Action being recorded
I have checked all of the site pages through the Facebook Debugger tool and all the pages are being scraped correctly with correct Open Graph Meta Tags etc...
At this stage I am wondering if anybody has had this issue? I am aware that there were issues with the Send Button this year but my understanding was that these issues had been resolved...
website url that displays incorrectly is: http://www.todaysdeals.ie/Deal.aspx?dlid=441
website url that displays correctly is: http://www.todaysdeals.ie/Deal.aspx?dlid=439

It looks to me like the problem is in how you're declaring the button code. You've specified a width of 90px in the FBXML code, but Facebook seems to be ignoring this and rendering its code at 150px.
My guess is on the incorrect page, you've got a large number of likes on this page, and it's wrapping the buttons into a hidden area of the div.
I'd start by increasing the width in your FBXML code to at least 176px and see what happens.

Last view superimposed on current view when double-back navigating

I do the following navigation pattern:
Navigate into the app (and it's main view)
Go into a detail view that fetches something from a REST server (that is - it shows a progress indicator for a few seconds)
While progress indicator still is shown, I click the back-button twice in quick succession (easy to do by mistake)
The app returns to the main view, but with the content of the detail view superimposed on it.
A screenshot of the resulting mess is shown below.
This was recreated both on a Nokia Lumia 800 and HTC Titan.
First of all - what the h..? And is there anything I could have done to make this happen?
There is no exceptions (or anything else) shown in the output. The only thing happening in the OnNavigatedFrom() method of the detail view is nulling out the background image (for memory reasons). It happens in other views as well.
My idea is that the draw method on both views are called on different threads, leaving only the main view to be responsive.
Any idea as to what has happened here, and how I can fix this bug?

This type of issue happened to me when using TransitionFrame from Silverlight for Windows Phone toolkit. Using transitions when navigating from page to page can cause this if the user taps on back button once or twice while the transition/navigation is in progress.
I believe it's a bug, but couldn't find it reported at the official CodePlex site of the toolkit, therefore I don't know about any reliable solution or workaround except trying to handle the back button press on the page that's causing issues. In other words, catching the back button/key press and either disabling it (I'm not sure that this would pass certification!), or simply prompting user with a MessageBox that the page is still loading and if they are sure that they want to navigate back, might work for you.
Other solution I can think of is that you avoid using TransitionFrame, but that's not really a solution, right? :)

Wpf application -- How to save and load which screen the application is on

I've looked over Stack overflow and seen some posts that almost solve this problem but not really. To be specific I'm referring to an application that is deployed to users who might have 3 or 4 displays and the application would want to remember which one to go to on startup.
I have a WPF application and I want to save what screen it was on when the form does it's OnClose. Then when it loads I want to put my application on that screen.
How can this be done (without hacky Win32 API calls)?
EDIT: In a previous StackO post someone mentioned doing something like:
var screen = System.Windows.Forms.Screen.FromRectangle(
new System.Drawing.Rectangle(
(int)myWindow.Left, (int)myWindow.Top,
(int)myWindow.Width, (int)myWindow.Height));
Once I have screen it seems that the only thing I can do is check whether the application is either on the primary screen or not. Which is fine...if my users only have two screens, but not good if they have 3+. Is there something better I can do with this resulting screen object than just check if it's primary.

You can get more infomation on multiple monitors from Screen.AllScreens property
http://msdn.microsoft.com/en-us/library/system.windows.forms.screen.allscreens.aspx
Also from memory, I think if you just save your Window Left and Top position and restore them when you load your app, this works with multiple monitors.

I did this previously with a ViewManager class, a custom XML config file and MVVM. Essentially, when OnClose is called, the ViewManager class (A custom class that really just held a collection of also custom ViewInfo instances) is polled to find out which views are currently open and in which order (as they could be tabbed through using Ctrl+Tab) and what the ID of the record was that was being displayed; this app was using Entity Framework to access database data, each application view mapped to either a collection of records or a single record of a specific type.
Anyhow the XML output would contain the name of the View, the Application (there were several portions to the app which I referred to as applications internally) to which it belonged, information about the record that was loaded, etc.
Upon loading the program, the only View that is automatically loaded is the HomeView which potentially contains all other views. ViewManager checks the XML file and loads views based on it's content. This action could be turned off in the options screen so that users where presented with a clean workspace upon entering if they like.

WPF Navigation - Random Access - Go to directed page not just forward or back

I am using WPF Page navigation in a c# windows based application. There are a series of pages that I am creating like this
Page TargetPage = new myPage01();
TargetFrame.Navigate(TargetPage);
The first-time page creation and navigation are working fine, and because I am passing by object the pages are kept alive for me to reference at a later point.
When the user hits the last page (all different views of the same data) and clicks the next button I want the UI to "loop" around to the first page. I am trying to figure out how I can redirect the frame to that first page. I do not want to rely on the built-in journal history within the GUI itself. How can I reference the first page previously created or for that matter any of the previously created pages by referring to it in the code. All the page navigation examples I have come accross are always creating the page as new or using the back or next to navigate to other pages.
Thanks

I do not want to rely on the built-in journal history within the GUI itself.
If you do not want to do that you need to keep track of everything yourself, which i would not recommend unless there is something wrong with the build-in functionality. You can probably find the first page to be the last item of the BackStack.

How best to "turn off" a web page from another part of the application?

We have a web application that manages inventory for our computer support group. One of the things that we will be using this for is to drive a "Computers Currently In Use" map for our larger computer labs so that users can find an open computer more easily (the lab in our Main library has around 150 computers). The image used for the background of the display of this page is managed through the administrative part of the application as are the relationships between what stations are located in the lab and where they are located.
We'd like to make it so that admins can "turn off" the display of the map page for each location when the map is being updated in the administrative interface. My idea is to extend the table that holds the location data to indicate whether the location is available for map display, and check this when the map is updated. If the check indicates that the map should not be displayed, the page would draw a suitable message instead of displaying the map image and "in use" overlay data.
In the hopes that someone else may have done this, or something like it, before, I'd like to hear your suggestions on alternatives.
The map page will be refreshed periodically (one every 2 minutes) via AJAX by passing down the image url to use and the overlay data (positions of table and number of computers available at each). I'm thinking that when the page detects a transition from "don't display" to "display" it would refresh the page via HTTP GET.

This shouldn't be difficult to do using polling, since there are a small number of users checking for computer availability. You could probably poll a few times per minute without overburdening the server.
I would use a map with a bunch of absolutely position DIVs overlaying the map representing each computer. The background of each DIV would be either a "available" or "not available" image. You could then simply spit out some JavaScript in your Ajax response to add/remove class names from each DIV representing its current state. Changing the class name would change the background image f the DIV.
You could display a "loading" spinner while the status is being edited by the administrator (which would just be another class name).