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  • Byte array serialization in JSON.NET

    - by Daniel Earwicker
    Given this simple class: class HasBytes { public byte[] Bytes { get; set; } } I can round-trip it through JSON using JSON.NET such that the byte array is base-64 encoded: var bytes = new HasBytes { Bytes = new byte[] { 1, 2, 3, 4 } }; // turn it into a JSON string var json = JsonConvert.SerializeObject(bytes); // get back a new instance of HasBytes var result1 = JsonConvert.DeserializeObject<HasBytes>(json); // all is well Debug.Assert(bytes.Bytes.SequenceEqual(result1.Bytes)); But if I deserialize this-a-wise: var result2 = (HasBytes)new JsonSerializer().Deserialize( new JTokenReader( JToken.ReadFrom(new JsonTextReader( new StringReader(json)))), typeof(HasBytes)); ... it throws an exception, "Expected bytes but got string". What other options/flags/whatever would need to be added to the "complicated" version to make it properly decode the base-64 string to initialize the byte array? Obviously I'd prefer to use the simple version but I'm trying to work with a CouchDB wrapper library called Divan, which sadly uses the complicated version, with the responsibilities for tokenizing/deserializing widely separated, and I want to make the simplest possible patch to how it currently works.

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  • Windows 7 UAC manifest file for some VB6 application

    - by Daniel
    Hi, all, I have an old VB6 application which should run on Windows 7 (with UAV set to the default level, 3 of 4 IMHO). It has the functionality to update itself, and Windows 7 is now complaining that it would modify the computer (At least windows 7 is right here). I was able to run it in Vista with some kind of manifest file, but this does not seem to work anymore (which is the intended behaviour if I think of it). The manifest file is this: <?xml version="1.0" encoding="UTF-8" standalone="yes"?> <assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0"> <assemblyIdentity version="1.1.0.24" processorArchitecture="X86" name="IKOfficeAppStarter" type="win32"/> <description>IKOffice Starter</description> <dependency> <dependentAssembly> <assemblyIdentity type="win32" name="Microsoft.Windows.Common-Controls" version="6.0.0.0" processorArchitecture="X86" publicKeyToken="6595b64144ccf1df" language="*"/> </dependentAssembly> </dependency> <trustInfo xmlns="urn:schemas-microsoft-com:asm.v2"> <security> <requestedPrivileges> <requestedExecutionLevel level="asInvoker" uiAccess="true"/> </requestedPrivileges> </security> </trustInfo> </assembly> The manifest can be found near the exe "IKOffice Starter.exe" and is called "IKOffice Starter.exe.manifest", which should be okey. Currently the Shield Icon has gone from my .exe, but when try to start the software, i get the message "Der angeforderte Vorgang erfordert höhere Rechte", or translated to english "the requested operation requires elevation". What can I do to stop windows to bug me anymore, so I can install this application on our clients computers. Hey, I already told Windows to run it as Invoker, so why is it still complaining?

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  • How Can I Bypass the X-Frame-Options: SAMEORIGIN HTTP Header?

    - by Daniel Coffman
    I am developing a web page that needs to display, in an iframe, a report served by another company's SharePoint server. They are fine with this. The page we're trying to render in the iframe is giving us X-Frame-Options: SAMEORIGIN which causes the browser (at least IE8) to refuse to render the content in a frame. First, is this something they can control or is it something SharePoint just does by default? If I ask them to turn this off, could they even do it? Second, can I do something to tell the browser to ignore this http header and just render the frame?

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  • Using FFmpeg in c#?

    - by daniel
    So i know its a fairly big challenge but i want to write a basic movie player/converter in c# using the FFmpeg library. However the first obstacle i need to overcome is wrapping the FFmpeg library in c#. I downloaded ffmpeg but couldn't compile it on windows, so i downloaded a precompiled version for me. Ok awesome. Then i started looking for c# wrappers. I have looked around and have found a few wrappers such as SharpFFmpeg (http://sourceforge.net/projects/sharpffmpeg/) and ffmpeg-sharp (http://code.google.com/p/ffmpeg-sharp/). First of all i wanted to use ffmpeg-sharp as its LGPL and SharpFFmpeg is GPL. However it had quite a few compile errors. Turns out it was written for the mono compiler, i tried compiling it with mon but couldn't figure out how. I then started to manually fix the compiler errors myself, but came across a few scary ones and thought i'd better leave those alone. So i gave up on ffmpeg-sharp. Then i looked at SharpFFmpeg and it looks like what i want, all the functions P/Invoked for me. However its GPL? Both the AVCodec.cs and AVFormat.cs files look like ports of avcodec.c and avformat.c which i reckon i could port myself? Then not have to worry about licencing. But i wan't to get this right before i go ahead and start coding. Should I: Write my own c++ library for interacting with ffmpeg, then have my c# program talk to the c++ library in order to play/convert videos etc. OR Port avcodec.h and avformat.h (is that all i need?) to c# by using a whole lot of DllImports and write it entirely in c#? First of all consider that i'm not great at c++ as i rarely use it but i know enough to get around. The reason i'm thinking #1 might be the better option is that most FFmpeg tutorials are in c++ and i'd also have more control over memory management that if i was to do it in c#. What do you think? Also would you happen to have any usefull links (perhaps a tutorial) for using FFmpeg? EDIT: spelling mistakes

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  • Need example for BouncyCastle PGP File encryption in C#

    - by Daniel Brink
    Hi, I'm trying to write an c#.net app to encrypt files using my private key (in ascii format) and any other public key (also in ascii format). The BouncyCastle library looks like the correct thing to use, but I cannot find documentation for C#. Could anyone please give me an example of how to use BouncyCastle to encrypt a file. Thank you.

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  • jquery.ui.draggable.js and jquery.ui.widget.js conflict

    - by Daniel S
    hello I had a working application, which uses a jquery ui dialog. I wanted to make the dialog draggable. As far as I know the only thing needed is the jquery.ui.draggable.js script. So I added it to the scripts I am using, but know I get the following error (as shown in the firebug console): base is not a constructor The relevante line in jquery.ui.widget.js is: var basePrototype = new base(); This is how I am adding all the scripts: <script type="text/javascript" src="/media/development-bundle/jquery-1.4.2.js"></script> <script type="text/javascript" src="/media/development-bundle/ui/jquery.ui.core.js"></script> <script type="text/javascript" src="/media/development-bundle/ui/jquery.ui.widget.js"></script> <script type="text/javascript" src="/media/development-bundle/ui/jquery.ui.draggable.js"></script> <script type="text/javascript" src="/media/development-bundle/ui/jquery.ui.position.js"></script> <script type="text/javascript" src="/media/development-bundle/ui/jquery.ui.autocomplete.js"></script> <script type="text/javascript" src="/media/development-bundle/ui/jquery.ui.dialog.js"></script> Am I doing something wrong? or is this a problem with jquery? Thanks in advance for any help

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  • WMI Security error TF255437 when installing TFS 2010 RC

    - by Daniel O
    Does anyone know the resolution to the following error. In this scenario, TFS will be using a local report server instance which points uses a separate SQL Server database engine instance. An error occurred while querying the Windows Management Instrumentation (WMI) interface on the following computer databaseServer. The following error message was received: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)).

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  • IE8: Disable cleartype?

    - by Daniel
    For IE7, it's possible to add filter: none; to the body css to disable cleartype on fonts through CSS. I don't like the fuzzy look it gives, and it isn't really consistent across browsers. IE; Firefox and IE6 show it differently. IE8 however, seems to ignore the css option, even when forcing the browser into IE7 compatibility mode using: <meta http-equiv="X-UA-Compatible" content="IE=7" /> TL;DR: How do I disable clear-type fonts in IE8 through CSS?

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  • wsdl2java excpetion

    - by Daniel
    java org.apache.axis2.wsdl.WSDL2Java -s -p studs.exchange -uri https://api.betfair.com/exchange/v5/BFExchangeService.wsdl Retrieving document at 'https://api.betfair.com/exchange/v5/BFExchangeService.wsdl'. log4j:WARN No appenders could be found for logger (org.apache.axis2.description.WSDL11ToAllAxisServicesBuilder). log4j:WARN Please initialize the log4j system properly. Exception in thread "main" org.apache.axis2.wsdl.codegen.CodeGenerationException: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException at org.apache.axis2.wsdl.codegen.CodeGenerationEngine.generate(CodeGenerationEngine.java:271) at org.apache.axis2.wsdl.WSDL2Code.main(WSDL2Code.java:35) at org.apache.axis2.wsdl.WSDL2Java.main(WSDL2Java.java:24) Caused by: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException at org.apache.axis2.wsdl.codegen.extension.SimpleDBExtension.engage(SimpleDBExtension.java:53) at org.apache.axis2.wsdl.codegen.CodeGenerationEngine.generate(CodeGenerationEngine.java:224) ... 2 more Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.axis2.wsdl.codegen.extension.SimpleDBExtension.engage(SimpleDBExtension.java:50) ... 3 more Caused by: java.lang.NoSuchMethodError: org.apache.ws.commons.schema.XmlSchema.getTypeByName(Ljava/lang/String;)Lorg/apache/ws/commons/schema/XmlSchemaType; at org.apache.axis2.schema.SchemaCompiler.isComponetExists(SchemaCompiler.java:2728) at org.apache.axis2.schema.SchemaCompiler.getParentSchemaFromIncludes(SchemaCompiler.java:2670) at org.apache.axis2.schema.SchemaCompiler.getParentSchemaFromIncludes(SchemaCompiler.java:2704) at org.apache.axis2.schema.SchemaCompiler.getParentSchema(SchemaCompiler.java:2644) at org.apache.axis2.schema.SchemaCompiler.processElement(SchemaCompiler.java:758) at org.apache.axis2.schema.SchemaCompiler.processElement(SchemaCompiler.java:552) at org.apache.axis2.schema.SchemaCompiler.process(SchemaCompiler.java:1991) at org.apache.axis2.schema.SchemaCompiler.processParticle(SchemaCompiler.java:1874) at org.apache.axis2.schema.SchemaCompiler.processComplexType(SchemaCompiler.java:1081) at org.apache.axis2.schema.SchemaCompiler.processAnonymousComplexSchemaType(SchemaCompiler.java:980) at org.apache.axis2.schema.SchemaCompiler.processSchema(SchemaCompiler.java:934) at org.apache.axis2.schema.SchemaCompiler.processElement(SchemaCompiler.java:592) at org.apache.axis2.schema.SchemaCompiler.processElement(SchemaCompiler.java:563) at org.apache.axis2.schema.SchemaCompiler.compile(SchemaCompiler.java:370) at org.apache.axis2.schema.SchemaCompiler.compile(SchemaCompiler.java:280) at org.apache.axis2.schema.ExtensionUtility.invoke(ExtensionUtility.java:103) ... 8 more whats is happening here? what about log4j

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  • QListView/QListWidget with custom items

    - by Daniel
    I'm writing my first Qt application with PyQt and am having some trouble creating a custom list view. I'd like the list to contain arbitrary widgets (one custom widget in particular). How would I go about this? It seems that the alternative would be to create a table or grid view wrapped in a scrollbar. However, I'd like to be able to take advantage of the model/view approach as well as the nesting (tree-view) support the built-ins handle. EDIT: To clarify, this widget is interactive (contains buttons), so the solution requires more than painting a widget.

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  • Error: "Suite Integration Toolkit Executable has stopped working" during VS2010 installation

    - by Daniel
    After uinstalling VS2012 and installing back Visual Studio 2010 C# Express I was getting strane warning: 2008 is not a valid number so I decided to reinstall VS2010, but I couldn't uinstall it. I was getting error: Suite Integration Toolkit Executable has stopped working. I managed to uinstall VS2010 with VS2010 Uinstall Tool, but now I want to install Visual Studio 2010 C# Express back. I'm getting Suite Integration Toolkit[...] error again when I try to install it using web installer. Could you help me resolve my problem? And I've got Tablet PC Components function disabled in Control Panel / Programs and Utilites.

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  • Android MediaPlayer ignores it's internal volume when the system volume changes

    - by Daniel Flower
    Hi, here is my situation: I have a media player playing music in an Android application. I've found that with certain headphones, the volume is much too loud even when the volume is set to it's lowest setting. As a result, I want to change the volume of the music for all volume levels to be 10% of what it normally is (actually, this value is user-defined of course). The following works perfectly: mediaPlayer.setVolume(0.1f, 0.1f); The volume of the music is now at a good level for listening. However, if the user now changes the volume using the volume rocker (thus changing the music stream volume), the media player changes the volume as expected, but it also seems to reset the 'setVolume' parameters to 1.0, causing a massive volume change. Setting the volume back to 0.1 sets the volume to how it should be (which is 10% of the current music stream volume). To quote the Android docs for the MediaPlayer.setVolume method: This API is recommended for balancing the output of audio streams within an application How can you do this if it gets reset to 1.0 each time the system volume changes? Any help muchly appreciated. Thanks.

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  • Beginner learning assembly preserving esp after function calls

    - by Daniel
    I'm a beginner learning some assembly, when preserving the ESP register before a function call does it matter if you do it by adding or subtracting? hard to explain, consider the following mov esi, esp sub esp, 12 // on 32bit OS this would mean that there are 3 arguments to the function // push, function call etc cmp esi, esp // should be the same or mov esi, esp // push, function call etc add esp, 12 cmp esi, esp // should be the same Also if for some reason the cmp fails, is it safe to do mov esp, esi to re-align the stack? Thanks EDIT: Also how come i need to do this for a call like sprintf, but MessageBox seems to fix ESP for me? How am i to know what function needs this and what doesn't?

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  • MEF Property Export with PartCreationPolicy

    - by Daniel Skinner
    When I try to do this: [Export(typeof(IMyService))] [PartCreationPolicy(CreationPolicy.Shared)] private MyService Service { get { var service = new MyService(); service.Configure(); return service; } } I get a compile error: Attribute 'PartCreationPolicy' is not valid on this declaration type. It is only valid on 'class' declarations. Is this a bug? I don't see why MEF would allow property exports but not allow one to specify the part lifetime. Using VS2010 RC.

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  • setup for prawn, prawnto on heroku

    - by daniel
    I'm trying to use prawn, prawnto for generating pdfs in a rails application hosted on heroku. But I'm struggling on the setup. Is it possible to use prawn, prawnto on heroku? Is there a guide explaining what I should do? Thanks

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  • Android - phone number contact format

    - by Daniel Benedykt
    Hi In Android I can get phone numbers of all the contacts without any problem. Tha problem is that for most users some numbers are stored as 'local' numbers, meaning that they dont have the country code included. For example, if the user lives in US and he has 2 contacts: 1) John - 555-123-1234 (local) (starting 1 not showing) 2) Jane - 44-123456787 (england phone number) The question is: How do I get all the numbers in an international format, when some of the numbers doesnt include the country code? Any way to figure that out? Thanks

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  • What tools provide burndown charts to Bugzilla or Mylyn?

    - by Daniel Jomphe
    My team and I need to work on a project whose bugs are filed in Bugzilla, using Mylyn. Do you know of any tool or plug-in that provides scrum-inspired burndown charts to Bugzilla or Mylyn? Hopefully, this tool would be free for commercial usage, but we're not closed to commercial tools. Update: 4 hours of research allowed me to find very few free tools. Looks like bugzilla isn't popular in agile teams! And obviously, it's not the best fit.

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  • Creating a 'Custom Designer' Visual Studio 2010 Add-in

    - by Daniel I-S
    A major part of our work is creating and manipulating certain XML files, for which have a custom editor. The editor is starting to get creaky and we are looking at building a replacement. Since VS2010 has recently arrived, ostensibly with an improved add-in architecture (MEF?), I am interested in the possibility of building the editor as a custom editor within Visual Studio. It would have to appear in the same way as the code editor or the Designer - a tab item, of which there can be many open at once, containing the GUI we use to edit the files. It would integrate with VS's Edit menu. It could use the output window to display messages. It would appear the same as any other editor within Visual Studio. Right now, I am looking for examples of add-ins that work in a similar way - ideally with source code - to see whether this model would suit our requirements. I am also looking for any documentation or tutorials relevant to creating a VS2010 add-in, or information about VS2008 add-ins if this is still relevant. Any input is welcome. Thanks!

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  • EWS 2010: Public Folder Problem using .NET

    - by Daniel
    I've recently coded a .NET Console app using C#. It's purpose was to read the emails within a specific folder, parse them for specific values and save them to a database. Our email system, at the time I originally coded this, was Exchange 2003. However, I was made aware we would soon be upgrading to Exchange 2010: ergo, I built the code to work in both environments. Following the migration to 2010, however, the app has broken. The app uses the EWS API for 2010 functionality. When it attempts to use the ExchangeService's FindFolders method to find the publicfoldersroot, it throws an exception. Here's the code: ExchangeService service = new ExchangeService(); FindFoldersResults findRootFldrs; service.UseDefaultCredentials = true; service.AutodiscoverUrl("[email protected]", delegate(string x) { return true; }); FolderView fview = new FolderView(100); fview.Traversal = FolderTraversal.Deep; if (findRootFldrsSub == null) { //Set to root to test local folders -- findRootFldrs = service.FindFolders(WellKnownFolderName.PublicFoldersRoot, fview); } The exception: "The mailbox that was requested doesn't support the specified RequestServerVersion" I've attempted: -Setting the exchangeservice to 2007 (throws an exception: "An internal server error occurred. The operation failed.") -Giving myself the highest level of permission to the Public Folder (no effect) -Manually setting my credentials (no effect) I can view the public folders in outlook; the publicfoldersroot property is available in the intellisense; the code works on local folders (I can parse my inbox). My current thinking is that it's a setting on the recent setup of Exchange 2010: unfortunately that isn't really my field.

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  • Managing database connections in an Android Activity

    - by Daniel Lew
    I have an application with a ListActivity that uses a CursorAdapter as its adapter. The ListActivity opens the database and does the querying for the CursorAdapter, which is all well and good, but I am having issues with figuring out when to close both the Cursor and the SQLiteDatabase. The way things are handled right now, if the user finishes the activity, I close the database and the cursor. However, this still ends up with the DalvikVM warning me that I've left a database open - for example, if the user hits the "home" button (leaving the activity in the task's stack), rather than the "back" button. If I close them during pause and then re-query during resume, then I don't get any errors, but then a user cannot return to the list without it requerying (and thus losing the user's place in the list). By this I mean, the user can click on any item in the list and open a new activity based on it, but will often want to hit "back" afterwards and return to the same place on the list. If I requery, then I cannot return the user back to the correct spot. What is the proper way to handle this issue? I want the list to remain scrolled properly, but I don't want the VM to keep complaining about unclosed databases. Edit: Here's a general outline of how I handle the code at the moment: public class MyListActivity extends ListActivity { private Cursor mCursor; private CursorAdapter mAdapter; protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mAdapter = new MyCursorAdapter(this); setListAdapter(mAdapter); } protected void onPause() { super.onPause(); if (isFinishing()) { mCursor.close(); } } protected void onDestroy() { super.onDestroy(); mCursor.close(); } private void updateQuery() { // If we had a cursor open before, close it. if (mCursor != null) { mCursor.close(); } MyDbHelper dbHelper = new MyDbHelper(this); SQLiteDatabase db = dbHelper.getReadableDatabase(); mCursor = db.query(...); mAdapter.changeCursor(mCursor); db.close(); } } updateQuery() can be called multiple times because the user can filter the results via menu items (I left this part out of the code, as the problem still occurs even if the user does no filtering). Again, the issue is that when I hit home I get leak errors. Yet, after going home, I can go back to the app and find my list again - cursor fully intact.

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  • C# Gui setting control.Enabled to false fires OnClick event???

    - by Daniel
    For some really weird reason when i set the .Enabled property to false on a simple text box on a small GUI, it fires a radio buttons OnClick event and its causing lots of problems. I have breakpointed the txtBox.Enabled = false; and after stepping over OR into it i jump straight to the OnClick event of the radio button control Here is the call stack as that happened: TestGUI.exe!TestGUI.frmMain.radiobuttonClicked(object sender = {Text = "Download Single Episode" Checked = true}, System.EventArgs e = {System.EventArgs}) Line 67 C# System.Windows.Forms.dll!System.Windows.Forms.Control.OnClick(System.EventArgs e) + 0x70 bytes System.Windows.Forms.dll!System.Windows.Forms.RadioButton.OnClick(System.EventArgs e) + 0x27 bytes System.Windows.Forms.dll!System.Windows.Forms.RadioButton.OnEnter(System.EventArgs e = {System.EventArgs}) + 0x3e bytes System.Windows.Forms.dll!System.Windows.Forms.Control.NotifyEnter() + 0x20 bytes System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.UpdateFocusedControl() + 0x195 bytes System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.AssignActiveControlInternal(System.Windows.Forms.Control value = {Text = "Download Single Episode" Checked = true}) + 0x54 bytes System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.ActivateControlInternal(System.Windows.Forms.Control control, bool originator = false) + 0x76 bytes System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.SetActiveControlInternal(System.Windows.Forms.Control value = {Text = "Download Single Episode" Checked = true}) + 0x73 bytes System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.SetActiveControl(System.Windows.Forms.Control ctl) + 0x33 bytes System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.ActiveControl.set(System.Windows.Forms.Control value) + 0x5 bytes System.Windows.Forms.dll!System.Windows.Forms.Control.Select(bool directed, bool forward) + 0x1b bytes System.Windows.Forms.dll!System.Windows.Forms.Control.SelectNextControl(System.Windows.Forms.Control ctl, bool forward, bool tabStopOnly, bool nested, bool wrap) + 0x7b bytes System.Windows.Forms.dll!System.Windows.Forms.Control.SelectNextControlInternal(System.Windows.Forms.Control ctl, bool forward, bool tabStopOnly, bool nested, bool wrap) + 0x4a bytes System.Windows.Forms.dll!System.Windows.Forms.Control.SelectNextIfFocused() + 0x61 bytes System.Windows.Forms.dll!System.Windows.Forms.Control.Enabled.set(bool value) + 0x42 bytes What the hell? It wouldn't have anything to do with the way i subscribe to the events would it? this.radioBtnMultipleDownload.Click += radiobuttonClicked; this.radioBtnSingleDownload.Click += radiobuttonClicked; this.radioCustomUrl.Click += radiobuttonClicked;

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  • iPhone/Obj-C: Accessing a UIScrollView from a View displayed within it.

    - by Daniel I-S
    I'm writing a simple iPhone app which lets a user access a series of calculators. It consists of the following: UITableViewController (RootViewController), with the list of calculators. UIViewController + UIScrollView (UniversalScroller), which represents an empty scroll view - and has a 'displayedViewController' property. UIViewController (Calculators 1-9), each of which contains a view with controls that represents a particular calculator. Each calculator takes 3-5 values via UITextFields and UISliders, and has a 'calculate' button. They can potentially be taller than 460px(iPhone screen height). The idea is: User taps on a particular menu item in the RootViewController. This loads and inits UniversalScroller, ALSO loads and inits the UIViewcontroller for the particular calculator that was selected, sets the displayedViewController property of UniversalScroller to the newly loaded calculator UIViewcontroller, and pushes the UniversalScroller to the front. When the UniversalScroller hits its 'viewDidLoad' event, it sets its contentSize to the view frame size of its 'displayedViewController' object. It then adds the displayedViewController's view as a subview to itself, and sets its own title to equal that of the displayedViewController. It now displays the calculator, along with the correct title, in a scrollable form. Conceptually (and currently; this stuff has all been implemented already), this works great - I can design the calculators how I see fit, as tall as they end up being, and they will automatically be accommodated and displayed in an appropriately configured UIScrollView. However, there is one problem: The main reason I wanted to display things in a UIScrollView was so that, when the on-screen-keyboard appeared, I could shift the view up to focus on the control that is currently being edited. To do this, I need access to the UniversalScroller object that is holding the current calculator's view. On the beganEditing: event of each control, I intended to use the [UniversalScroller.view scrollRectToVisible: animated:] method to move focus to the correct control. However, I am having trouble accessing the UniversalScroller. I tried assigning a reference to it as a property of each calculator UIViewController, but did't seem to have much luck. I've read about using Delegates but have had trouble working out exactly how they work. I'm looking for one of three things: Some explanation of how I can access the methods of a UIScrollView from a UIViewController whose view is contained within it. or Confirmation of my suspicions that making users scroll on a data entry form is bad, and I should just abandon scrollviews altogether and move the view up and down to the relevant position when the keyboard appears, then back when it disappears. or Some pointers on how I could go about redesigning the calculators (which are basically simple data entry forms using labels, sliders and textfields) to be contained within UITableViewCells (presumably in a UITableView, which I understand is a scrollview deep down) - I read a post on SO saying that that's a more pleasing way to make a data entry form, but I couldn't find any examples of that online. Screenshots would be nice. Anything to make my app more usable and naturally 'iPhone-like', since shuffling labels and textboxes around makes me feel like I am building a winforms app! I've only recently started with this platform and language, and despite being largely an Apple skeptic I definitely see the beauty in the way that it works. Help me solve this problem and I might fall in love completely. Dan

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