USB

USB HID Code project
Making USB C# friendly
Detect USB Device using Vendor and Product ID

WPF : UserControl and Focus managment

Letting a parent Usercontrol know about its child focus

Setting the Focused Element in Xaml:

<stackpanel focusmanager.focusedElement="{Binding ElementName=txtValue}"></stackpanel>

AGILE Stuff

Linked In Stuff

Asp.net MVC

Jquery user interface


Organising MVC Projects: NO code at all in UI

SQLSERVER: Undocumented Stored Procedures

Undocumented Extended and Stored Procedures : Timothy Wiseman

ASP.net Problems

1. Starting IIS on Vista for the first time Skype was found to be using port 8080 so stopped Skype and restarted iis without a problem.
2. Error message CS0016: Could not write to output file 'c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\etc etc .dll' -- 'Access is denied. 
Add full permissions for 'Network Service' & 'YourComputerName\IIS_IUSERS to:
• C:\Windows\Temp
• C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET
3. ASP.net local iis problem when trying to run locally

"Unable to start debugging on the web server. The web server is not configured correctly. See help for common configuration errors. Running the web page outside of the debugger may provide further information."

Error message not very helpfull, eventually fixed by removing directives in the Web.Config for
ScriptModule
WebExtensions
Not 100% sure why though they are probably in the Machine.config file and therefore created a duplicate which was only detected when running outside debug environment

.NET MicroFramework

Microsoft Opensource announcement

MVC : Summary of usefull stuff

Modifying the MVC to MVVM instead

Brad Abrams Worked Example
Best Practices
Using MVC with iis6

Nikhil MVC with asynchronous callback

C# Constructors

For some reason I always forget how to call one constructor from another. Of course now I've written it down I'll probably never need to refer to it again but anyway:

public Car(string model, int noWheels){}

Car(string model) : this(model,4){}

WPF: NUnit Testing when using the WPF Dispatcher

I have encoutered problems when using NUnit to test a ViewModel which has ThreadSafeObservableCollection. The thread safety comes about through using the Dispatcher and when you call Dispatcher.BeginInvoke, you are instructing the dispatcher to run the delegates on its thread when the thread is idle.
When running unit tests, the main thread will never be idle. It will run all of the tests then terminate.

To overcome this I have written a trap which looks for the NUnit Thread Name. A true result and the ThreadSafeCollection proceeds without using the Dispatcher.

private bool CheckDispatcherAccess()
{
if (_dispatcher.Thread.Name == "TestRunnerThread")
{
return true;
}
return _dispatcher.CheckAccess();
}
...


Other references to the Dispatcher issue when using NUnit

Using the WPF Dispatcher in NUnit Tests

WPF: MVVM

M-V-VM training day sample application and decks

MVVM

Wizard example

WPF: INotifyPropertyChanged and Delayed Binding

Delayed Binding TextBox

Delayed Binding using MarkupExtension which I couldn't get to work, Good for the MarkupExtension tho

Various Implementations of INotifyPropertyChanged

REPOSITORY PATTERN

Applying Domain-Driven Design and Patterns by Jimmy Nilsson

Repository pattern using LINQ and some IoC, it's really joy to programm

Using the unit of work-per-request pattern in ASP.NET MVC

AGILE : Release Strategies and Software

http://wiki.cantara.no/display/ARS/Agile+Release+Strategies+Home;jsessionid=1032BB46B2781F05A21CF4155A9FBB17

http://wpf-samples.blogspot.com/2007/01/pimp-up-your-radiobutton-sample.html

LINQ: Update Data

var product = (from p in dataContext.Products
where p.ProductID == 1
select p).Single();

product.Name = "New Product Name";

dataContext.SubmitChanges();

Using LINQ with MVC
The following code using the Attach method on the Linq entity will throw an exception as per Stephen Walther's excellent article Stephen Walther blog archive.  This is a concurrency issue and can be remedied in 2 ways as per Stephen's article.
public ActionResult Edit(DxDataBook editedPart)
{
try
{
var originalPart = (from p in dc.DxDataBooks
where p.P_D_Num == editedPart.P_D_Num
select p).First();

if (!ModelState.IsValid)
{
return View(originalPart);
}

dc.DxDataBooks.Attach(editedPart,true);
dc.SubmitChanges();
return RedirectToAction("Index");
}
catch
{
return View();
}
}

WPF : XPS Printing Support

Printing ListView using XPS

References required
using System.Windows.Xps.Packaging;

using System.Windows.Xps;
 
held in Assys
Sytem.Printing.dll
ReachFramework.dll

WPF : Non scrolling ListView inside a StackPanel!!!!

Compositional UI designers beware! If you use the StackPanel and attempt to load a view containing any kind of ListView inside that StackPanel's tree, said ListView will never scroll vertically.

Same problem when used in a grid with Height set to Auto.

WPF: Defining a style based on the base style

<Style TargetType="ToggleButton" BasedOn="{StaticResource {x:Type ToggleButton}}">

The VS2008 IDE fails to render the XAML correctly if you try to modify an existing Style for a Component. It does still compile and excute correctly however.

A ListViewItem Style for example:

<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem" BasedOn="{StaticResource {x:Type ListViewItem}}">
<Style.Triggers>
<Trigger Property="ListViewItem.IsMouseOver" Value="True">
<Setter Property="ListViewItem.IsSelected" Value="true"></Setter>
</Trigger>
</Style.Triggers>
</Style>

MVVM: Silverlight versus WPF

In order to use the Command model for Silverlight it is necessary to download the Prism for Silverlight extensions

Silverlight Prism extension

Alternatively it is possible to place a click event inside view behind on Silverlight view then cast Datacontext to ViewModel and execute methods

add to the View code behind

Button_Click(object sender,RoutedEventArgs e)
{
var data = this.DataContext as ViewModel;

data.MyMethod();
}

Windows CE Programming

1. Detect version using cgacutil

WPF

Test for Design Mode:
DesignerProperties.GetIsInDesignMode

Access framework property Metadata:
FrameworkPropertyMetaData fpmd = new TextBox.TextProperty.GetMetadata(typeof(TextBox)) as FrameworkPropertyElement;
bool bindingDirectionByDefault = fpmd.BindsTwoWayByDefault;

Changing List Selected Item on TextBox GotFocus:

<listview.itemcontainerstyle>
<style targettype="ListViewItem">
<setter property="HorizontalContentAlignment" value="Stretch"></setter>
<eventsetter event="GotFocus" handler="TextBox_GotFocus"></eventsetter>
</style>
</listview.itemcontainerstyle>



private void Item_GotFocus(object sender, RoutedEventArgs e)
{
ListViewItem item = sender as ListViewItem;
this.parameterList.SelectedItem = item.DataContext;
}

Threading Issues

WPF Threading issues

Exception Thrown "The calling thread cannot access this object because a different thread owns it".

When hooking up Images using a MVVM pattern and background threads this
Exception Thrown "The calling thread cannot access this object because a different thread owns it".
Use Image.Freeze() command to prevent this.

http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/5975d3f5-9771-442f-a11e-183b4969e38d/


Again MVVM this time button does not update its valid state following a background thread.

Normally the WPF infrastructure updates every command`s enabled/disabled state but in this case need to refresh the command`s enabled/disabled state manually.
Use InvalidateRequestQuery.
http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/d2cf8ff9-eecd-40ec-b3a1-c8c8e39378d9

This is a added to the event subscriber in the MV
Application.Current.Dispatcher.BeginInvoke(new Action CommandManager.InvalidateRequerySuggested));

EIASCII

How to write to a Boolean in EiASCII. Use >00 for False and >01 for True