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• How to access a control placed inside data template of listbox?

  - by Subhen

  Hi I have the following code: <ListBox x:Name="foldersListBox" Grid.Column="0" MouseLeftButtonUp="foldersListBox_MouseLeftButtonUp" BorderThickness="0" Height="AUTO" ScrollViewer.HorizontalScrollBarVisibility="Disabled" ScrollViewer.VerticalScrollBarVisibility="Disabled"> <DataTemplate> <Border BorderBrush="LightGray" BorderThickness="2" CornerRadius="4"> <Image x:Name="folderImage" Width="70" Height="70" Margin="3" /> </Border> </DataTemplate> </ListBox> Now when I am trying to access folderImage from code behind. I can use the loaded event and typecast the sender as Image type , but I dont want that way. Help plz. Thanks, Subhen

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• Getting started with silverlight 3 mvvm

  - by bplus

  I've just written my first silverlight 3 app. It's written using the code behind in a rater messy way. I want to refactor into mvvm. I'm finding it extremely difficult to find any tutorials on this. So far from what I can gather I'll probably need a mvvm framework. Mvvm-light toolkit sounds like it might be what I want, but I can't find a beginners tutorial. This is actually more frustrating than I thought - do I actually need a framework? Would I maybe be better just trying to do this from scratch with out a framework? How did you get started with silverlight and mvvm? Also I'm using vs2008 so silverlight 4 is a non starter for me. Thanks in advance for any pointers.

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• How do I maintain coherency between model and view-model in MVVM pattern?

  - by Mike Garrett

  Problem Statement I'm writing a very basic WPF application to alter the contents of a configuration file. The data format is an XML file with a schema. I want to use it as a learning project for MVVM, so I have duly divided the code into Model: C# classes auto-generated from xsd.exe View-Model: View-friendly representation of the Model. View: Xaml and empty code behind I understand how the View-Model can make View-binding a breeze. However, doesn't that leave the View-Model <- Model semantics very awkward? Xsd.exe generates C# classes with arrays for multiple XML elements. However, at the V-VM level you need Observable Collections. Questions: Does this really mean I have to keep two completely different collection types representing the same data in coherence? What are the best practices for maintaining coherence between the Model and the View-Model?

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• Looking for an explanation of the 'Asynchronous' word in .Net?

  - by IbrarMumtaz

  I need someone to explain the following names; Asynchronous Delegates. Asynchronous methods. Asynchronous events. I'm currently going over this for my 70-536 exam and I am covering all my bases so far. The threading chapter and online resources have been good to me on my second read through. Still though, the names used above mean absolutely nothing to me? I would really appreciate the meaning behind the word 'Asynchronous' and its relevance to Delegates, methods and events. Feel free to go into as much detail as you like. Thanks, Ibrar

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• Open a PDF file in an external app on iPad

  - by Yuji

  I'd like to make my app to open a specified PDF by an external app of the user's choice on the iPad. How can I do that? Or, is there any open-source PDF reader framework available so that I can put it into my app? My situation in more detail: I'm thinking of porting to the iPad from OS X / rewriting from scratch for the iPad an app which manages lots of PDFs (journal articles, etc.), but I don't want to write the PDF reader part, because there are many good ones already out there; I don't want to reinvent the wheels. (You might say you shouldn't reinvent pdf management apps, but I'd like to make one as a front end to SPIRES, and there isn't one so far.) As the app would be a front end to a serious reading activity, UIWebView's pdf capability is not enough. Also, users of my app would have various preferences which app to use. That's the background behind my question. Thanks in advance!

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• How to delete table rows programmatically?

  - by Donal O'Danachair

  I have a table which I am manipulating with a tableViewController (no nib, and the controller is creating the table behind the scenes) I'm trying to delete a row from the table based on its row number; I can delete it from the array I use to create the cell in cellForRowAtIndexPath, but I get a strange error if I try to do the following, which is the same code as in tableView:commitEditingStyle:forRowAtIndexPath: where it works fine NSIndexPath *indexPath = [NSIndexPath indexPathForRow:i+1 inSection:1] [self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; It gives an error -[_WebSafeForwarder forwardInvocation:] and then jumps out of the method but does not crash the app Can anyone help?

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• CALayer rotation on Y axis ignores z position

  - by Rafa

  Hi, i have some CALayers one on top of the other with different z-values. the z-values are sequential (1,2,3 ...). i wrote some code that changes the y-rotation of a CALayer when i click on it. the y-rotations changes to -30.f the problem is that when i click on a CALayer it rotates and goes behind the CALayers that are actually beneath it (by z-value ordering). i understand that changing the y-rotation by -30.f actually takes the CALayer back in a sense. but shouldn't it consider the z-value as the index of the CALayer in the container and make sure it stays on top of lower z-values ?

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• DataReader Behaviour With SQL Server Locking

  - by Graham

  We are having some issues with our data layer when large datasets are returned from a SQL server query via a DataReader. As we use the DataReader to populate business objects and serialize them back to the client, the fetch can take several minutes (we are showing progress to the user :-)), but we've found that there's some pretty hard-core locking going on on the affected tables which is causing other updates to be blocked. So I guess my slightly naive question is, at what point are the locks which are taken out as a result of executing the query actually relinquished? We seem to be finding that the locks are remaining until the last row of the DataReader has been processed and the DataReader is actually closed - does that seem correct? A quick 101 on how the DataReader works behind the scenes would be great as I've struggled to find any decent information on it. I should say that I realise the locking issues are the main concern but I'm just concerned with the behaviour of the DataReader here.

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• Subversion: svn protocol with HTTP/HTTPS proxy

  - by Neeraj

  Hi all, I need to do a svn checkout,say svn checkout svn://XYZ.com/trunk. I am using the svn client from behind the proxy. I had accessed other repositries using the http protocol in past but with svn protocol,it fails with "Connection Refused", reason I think being the port not allowed by the proxy.Nonetheless, the HTTP protocol is not supported on the server. However, svn+ssh gets connected but it prompts for an account at that server which I don't have? Is there any way out other than requesting for an account? Note that I can't affect the settings of the proxy server.

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• WPF - Pausing the UI Thread?

  - by Rachel

  I have a tab control with draggable tabs. When the mouse is released it removes the selected tab from the tabControl and adds it to its new location. My problem is that the TabControl draws itself after removing the tab, and then again when adding the tab so there is a very noticeable flicker that shows the tab behind the tab being moved. Is there a way I can pause the UI thread so the tab control does not redraw until both the Remove and the Insert operations finish? Or perhaps some other alternative way of rearranging the tab items? The Drag/Drop operation exists in a separate code file as an Attached Property

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• Is ASP.Net Server Control, Postback Architecture failed in current Web 2.0 World.

  - by Lalit

  What i am looking around me is the drastically change in ASP.Net Architecture. More and more company are following the approach of JSON based wcf service in middle tier. Plain HTML based UI tier with JQuery/Ajax. No Postback at all, This contradicts the Default behaviour of Asp.Net Server Control/Code Behind Event handler/Postback. I am a Asp.Net Web Developer for around 4 years, and concerned about the future of ASP.Net. Is the Default Architecture of ASP.Net is Outdated at all? Does MVC or ASP.Net 4.0 Tries to solve the Issue?

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• Variable length Blob in hibernate?

  - by Seth

  I have a byte[] member in one of my persistable classes. Normally, I'd just annotate it with @Lob and @Column(name="foo", size=). In this particular case, however, the length of the byte[] can vary a lot (from ~10KB all the way up to ~100MB). If I annotate the column with a size of 128MB, I feel like I'll be wasting a lot of space for the small and mid-sized objects. Is there a variable length blob type I can use? Will hibernate take care of all of this for me behind the scenes without wasting space? What's the best way to go about this? Thanks!

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• How to create a custom ADO Multi Demensional Catalog with no database

  - by Alan Clark

  Does anyone know of an example of how to dynamically define and build ADO MD (ActiveX Data Objects Multidimensional) catalogs and cube definitions with a set of data other than a database? Background: we have a huge amount of data in our application that we export to a database and then query using the usual SQL joins, groups, sums etc to produce reports. The data in the application is originally in objects and arrays. The problem is the amount of data is so large the export can take 2 hours. So I am trying to figure out a good way of querying the objects in memory, either by a custom OLAP algorithm or library, or ADO MD. But I haven't been able to find an example of using ADO MD without a database behind it. We are using Delphi 2010 so would use ADO ActiveX but I imagine the ADO.NET MD is similar. I realize that if the application data was already stored in a database the problem would solve itself. Also if Delphi had LINQ capability I could query the objects and arrays that way.

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• mySQL database password change now crashes Joomla.

  - by casim

  I have a mySQL database behind a Joomla install. I changed the database password because I forgot it but now Joomla crashes looking for the database. I guess joomla has the password written somewhere - if anyone knows I might be able to manual edit it and enter the new database password. Otherwise I'm hoping a manual install of a backup of the original database will work. I need to know does a backup include the database password. If yes, will reinstating my original database solve the problem for me by reverting the system back to it's original password? Please help. thx, s.

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• PHP: Odd behaviour with date_sunset function

  - by Svish

  I'm having a look at the date_sunset function in PHP and have met an issue that I find a bit strange. I have this piece of code: $sunset = date_sunset(mktime(0, 0, 0, 5, 14, 2010), $format, // Format 55.596041, // Latitude 12.992495, // Longitude 90, // Zenith 2 // GMT Offset ); For the three different formats, that would give me: SUNFUNCS_RET_STRING 21:05 SUNFUNCS_RET_DOUBLE 21.095732016315 SUNFUNCS_RET_TIMESTAMP 1273863944 // H:i:s O -> 19:05:44 +0000 Why is the timestamp format ignoring the gmt offset? Is is supposed to be like that? If so what is the reason behind that?

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• Post ASP.Net Form data to another page

  - by william

  I have an ASP.Net Page, aspx with its default form. I have a Submit Button for it. Upon clicking, it will post the data to itself. In other words, Button Click Event() from code behind will execute the necessary. After that, I would like to post the same data to another ASp.Net Page, aspx from another domain. So, how can I do it? I tried creating a Form in Button Click Event and a javascript to Submit the Form so that it will post. But the Form is not appearing hence there is already aForm` on the page. Is there anyway to do it?

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• Does Adorner breaks MVVM?

  - by Padu Merloti

  I'm developing a WPF app using MVVM. Most of my views have only xaml markup and nothing (except default boilerplate) on code behind. All except one view that I use adorners to "blacken" the screen when I want to make the whole screen disabled. private void Window_Loaded(object sender, RoutedEventArgs e) { //todo: transfer to modelview contentAreaAdorner = AdornerLayer.GetAdornerLayer(contentArea); waitingAdorner = new WaitingAdorner(contentArea); } Is that ok? Or is there a better way to implement this in my viewmodel?

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• Multiple .NET processes memory footprint

  - by mr.b

  I am developing an application suite that consists of several applications which user can run as needed (they can run all at the same time, or only several..). My concern is in physical memory footprint of each process, as shown in task manager. I am aware that Framework does memory management behind the curtains in terms that it devotes parts of memory for certain things that are not directly related to my application. The question. Does .NET Framework has some way of minimizing memory footprint of processes it runs when there are several processes running at the same time? (Noobish guess ahead) Like, if System.dll is already loaded by one process, does framework load it for each process, or it has some way of sharing it between processes? I am in no way striving to write as small (resource-wise) apps as possible (if I were, I probably wouldn't be using .NET Framework in the first place), but if there's something I can do something about over-using resources, I'd like to know about it.

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• dynamically populate identy in web.config

  - by user175084

  Is there a way i can dynamically populate the username and password of identity in web.config from my code behind... as i cannot hard code it. <identity impersonate="true" userName = "Admin" password= "xyz"> any help..???? Thanks This the first part the 2nd part i think i can solve if i get this.... 2nd part link text I got a link which might help me solve the problem but i am having difficulty understanding it and implementing..... link text any help...

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• ANDROID. Emulate Hardware Keys with an IME. Doesn't work with Dialog and Spinner

  - by shutdown11

  I have understand that the only way to inject KeyEvents in the Android System is to implement an Input Method. I have created my IME with the purpose to control from remote the device. I emulate the hardware keys using the method private void keyDownUp(int keyEventCode) { getCurrentInputConnection().sendKeyEvent( new KeyEvent(KeyEvent.ACTION_DOWN, keyEventCode)); getCurrentInputConnection().sendKeyEvent( new KeyEvent(KeyEvent.ACTION_UP, keyEventCode)); } in my class that extends InputMethodService. It works fine until an AlertDialog, or the menu of a Spinner comes in foreground. Also the windows that appears when the Menu key is problematic. My IME can't get focus on them, and the keyevents are sent to the activity behind them. Using hardware keys, the Dialog get the focus and you can select the botton on the Dialog. How can i emulate that, using the IME(or anything else)?

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• mod_rewrite in conjunction with "options indexes"

  - by Travis

  I have a directory ("files") where sub-directories and files are going to be created and stored over time. The directories also need to deliver a directory listing, using "options indexes", but only if a user is authenticated, and authorized. I have that part built, and working, by doing the following: <Directory /var/www/html/files> Options Indexes IndexOptions FancyIndexing SuppressHTMLPreamble HeaderName /includes/autoindex/auth.php </Directory> Now I need to take care of file delivery. To force authentication for files, I have built the following: RewriteCond %{REQUEST_URI} -f RewriteRule /files/(.*) /auth.php I also tried: RewriteCond %{REQUEST_URI} !-d RewriteRule /files/(.*) /auth.php Both directives are redirecting to auth.php when I request: foo.com/files/bar/ foo.com/files/bar/baz I am outputting the SERVER global on auth.php during testing and it is showing the requests as I made them (I thought Apache may have been doing something behind the scenes by adding something like "index.html" to the end with "Options Indexes" being on). Ideas?

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• Is the javaScript not part of the DOM?

  - by DKinzer

  Why is it that scripts can still function even after the code used to create them is removed from the DOM? I ran into a situation where I wanted to prevent a broken script from running (@see my post). In my attempt to come up with a solution I wrote an extension with the following line (just to see what would happen). //doc is passed here because this script is running as a firefox extension outside //of the document context. $('script', doc).remove(); I assumed that this would remove all the scripts from the DOM, which it did, and that therefore no scripts would run on the page, which is not the case. I would love to know more about what's behind this behavior.

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• AuthenticationType Negotiate vs NTLM

  - by Claudio Redi

  I have the same code base used on 2 different sites hosted on the same server (IIS 7.5). For some reason, when I check the Identity.AuthenticationType property on the code behind of an http handler I see NTLM for 1 site and Negotiate for the other. This is causing some problems and I need both of them to use NTLM. Could you help me to figure out why this difference? So far I see both IIS sites are configured on the same way but of course there is at least 1 difference that I couldn't detect. Thanks!

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• Architecture of chatroulette

  - by user317163

  Could somebody explain to me the architecture behind chatroulette? I was thinking about a similar project that would only implement Audio support (for starters). Is the best way to set this up a flash server? If so, how should I go about getting into flash, will I need flex 4? I have some beginner experience with c++, c# and java but I have never developed anything for the web. I was also wondering how the randomizer matches up the participants. How would you code something like this. Im obviously pretty clueless here and I'd greatly appreciate some advice regarding this problem -- I don't expect copy and paste solutions. It would just be nice to hear how you guys would tackle this problem. Thank you very much

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• What's the official Microsoft way to track counts of dynamic controls to be reconstructed upon Postback?

  - by John K

  When creating dynamic controls based on a data source of arbitrary and changing size, what is the official way to track exactly how many controls need to be rebuilt into the page's control collection after a Postback operation (i.e. on the server side during the ASP.NET page event lifecycle) specifically the point at which dynamic controls are supposed to be rebuilt? Where is the arity stored for retrieval and reconstruction usage? By "official" I mean the Microsoft way of doing it. There exist hacks like Session storage, etc but I want to know the bonafide or at least Microsoft-recommended way. I've been unable to find a documentation page stating this information. Usually code samples work with a set of dynamic controls of known numbers. It's as if doing otherwise would be tougher. Update: I'm not inquiring about user controls or static expression of declarative controls, but instead about dynamically injecting controls completely from code-behind, whether they be mine, 3rd-party or built-in ASP.NET controls.

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