Yet another blog about WPF, Surface, SL, MVVM, NUI.... - Tag - how to - Comments

MVVM : How to keep collections of ViewModel and Model in sync - Zar

Zar — Mon, 11 Feb 2013 05:19:41 +0100

Nice Post, Thanks.

How to scale around a specific point and not the center of the Element - Martin Berger

Martin Berger — Fri, 07 Dec 2012 10:20:03 +0100

Hello,

what is this last line supposed to perform?

   if (scaleDelta > 1.0)
       _myObjectToScale.Center += new  Vector(newCenterXD, newCenterYD);
   else
       _myObjectToScale.Center += new  Vector(newCenterXD, newCenterYD);

scaleDelta can be less or greater that 1.0, same code will execute.

MVVM : How to keep collections of ViewModel and Model in sync - sanjuro

sanjuro — Mon, 29 Oct 2012 15:50:38 +0100

I agree with Nathan, Syncer should be implemented in .NET by default, but i would name it ProxyObservableCollection

Execute a command on a specified control when clicking on a button - JonathanANTOINE@falsemail.com

JonathanANTOINE@falsemail.com — Fri, 06 Apr 2012 09:01:17 +0200

You have to use the code in the ReceiveWeakEvent to do this

Execute a command on a specified control when clicking on a button - Jeremy McLain

Jeremy McLain — Thu, 05 Apr 2012 23:12:27 +0200

How would you do this portion from code behind?

   <Button Content="Delete selected"
          tools:ExecuteCommandOnControl.RoutedCommand="{x:Static igDP:DataPresenterCommands.DeleteSelectedDataRecords}"
         tools:ExecuteCommandOnControl.Target="{Binding ElementName=dataGrid}" />

MVVM - How to integrate the Office Ribbon respecting the pattern (especially the commands) - online writing

online writing — Fri, 16 Dec 2011 16:52:49 +0100

I am very interested in this sphere and reading this post I have known many new things, which I have not known before. Thanks for publishing this great article here.

MVVM : How to keep collections of ViewModel and Model in sync - David

David — Sat, 17 Sep 2011 18:37:08 +0200

Great post. Thanks!

[UPDATED] How to call the method from the base of the base of the current class ? (base.base.MyMethod) - Jonathan ANTOINE

Jonathan ANTOINE — Fri, 13 May 2011 10:25:44 +0200

@Thomas Levesque :Hello Thomas,

Thank you for your comment and it works like a charm !

Btw, there is still reflection in your solution, the only difference is that we use 'this' as the current instance without recreating one.

I will update my post to add your solution

Thx a lot !

[UPDATED] How to call the method from the base of the base of the current class ? (base.base.MyMethod) - Thomas Levesque

Thomas Levesque — Fri, 13 May 2011 00:31:53 +0200

Interesting...
.
Normally, you should never need to call base.base.SomeMethod, it's usually a sign of a bad design because you're not supposed to be aware of implementation details of the base class. But of course in the case of the TabControl you're not in control of the base classes, so it's different...
.
Anyway, I don't really like this solution... Two main reasons :
- you have to create a dummy instance of the class, which is pretty bad for performance and could have unexpected side effects
- it uses reflection (also bad for performance) on a non documented private field of the Delegate class. The implementation of this class could change in future versions, and this solution wouldn't work any more.
.
What you need to achieve this is a non-virtual call to GrandFather.MyMethod. This can be done by generating code at runtime with DynamicMethod:

   class Child : Father
   {
       private delegate void MyMethodOpenDelegate(GrandFather instance, object param);
       private static readonly MyMethodOpenDelegate _grandFather_MyMethod;
       
       static Child()
       {
           DynamicMethod dm = new DynamicMethod(
               "grandFather_MyMethod",
               typeof(void),
               new Type[] {typeof(GrandFather), typeof(object)},
               typeof(Child));
           
           var il = dm.GetILGenerator();
           il.Emit(OpCodes.Ldarg_0);
           il.Emit(OpCodes.Ldarg_1);
           il.EmitCall(OpCodes.Call, typeof(GrandFather).GetMethod("MyMethod"), null);
           il.Emit(OpCodes.Ret);
           _grandFather_MyMethod =
               (MyMethodOpenDelegate)dm.CreateDelegate(
                   typeof(MyMethodOpenDelegate));
       }
       
       public override void MyMethod(object param)
       {
           _grandFather_MyMethod(this, param);
       }
   }

(note the use of OpCodes.Call instead of OpCodes.Callvirt)

[ping] [UPDATED] How to call the method from the base of the base of the current class ? (base.base.MyMethod) - DotNetKicks.com

DotNetKicks.com — Thu, 12 May 2011 00:00:34 +0200

How to call the method from the base of the base of the

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[ping] [UPDATED] How to call the method from the base of the base of the current class ? (base.base.MyMethod) - DotNetShoutout

DotNetShoutout — Thu, 12 May 2011 00:00:22 +0200

How to call the method from the base of the base of the

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[Performance tips] Use the system shadows instead of your own - Jonathan ANTOINE

Jonathan ANTOINE — Mon, 28 Mar 2011 21:09:11 +0200

@Nirvi : I think it will still work because we use a specific control (the shadow) in a specific assembly and not the theme system as a whole.

[Performance tips] Use the system shadows instead of your own - Nirvi

Nirvi — Sun, 27 Mar 2011 13:41:24 +0200

What if the user runs on XP SP3 with some of the freaky themes, will the Shadow Chrome appear?

[RIA Services] Why the client extended entities won't use the default backing store value ? EDITED - Jonathan ANTOINE

Jonathan ANTOINE — Mon, 22 Nov 2010 01:33:22 +0100

@Jeff Handley : thx for the info !

[RIA Services] Why the client extended entities won't use the default backing store value ? EDITED - Jeff Handley

Jeff Handley — Fri, 19 Nov 2010 18:38:58 +0100

Thanks for posting this. A note about the issue where re-loaded or submitted entities have their client-only properties overwritten with the default values: it will NOT be fixed in SP1. We are still evaluating designs for how we could address that in the best way possible.

How to create an hand writing to text control (ink recognizer) - Abdo

Abdo — Mon, 25 Oct 2010 13:30:50 +0200

Nice One , Thanks man.

[ping] How to create your own control library (how-to + tips) - DotNetShoutout

DotNetShoutout — Mon, 04 Oct 2010 17:41:37 +0200

How to create your own control library (how-to + tips)

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[ping] How to create your own control library (how-to + tips) - DotNetKicks.com

DotNetKicks.com — Mon, 04 Oct 2010 17:40:17 +0200

How to create your own control library (how-to tips)

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[ping] WPF tip : How can I use static/dynamic resources in my tests - DotNetShoutout

DotNetShoutout — Fri, 24 Sep 2010 12:55:20 +0200

How can I use static/dynamic resources in my tests

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[ping] WPF tip : How can I use static/dynamic resources in my tests - DotNetKicks.com

DotNetKicks.com — Fri, 24 Sep 2010 12:53:49 +0200

How can I use static/dynamic resources in my tests

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