Command binding mouse event result

Question

I have a mode view like this.

public class MouseEnterViewModel
    {
        private ICommand mouseEnterCommand;

        public ICommand MouseEnterCommand
        {
            get
            {
                if(mouseEnterCommand==null)
                {
                    mouseEnterCommand =new DelegateCommand<object>(OnButtonMouseEnter);
                }
                return mouseEnterCommand;
            }
        }

        public void OnButtonMouseEnter(object obj)
        {
            Button b=new Button();               
           
        }

my issue is OnButtonMouseEnter object is coming null.

my view page end bindings are as following.

        <Button Width="250"
                Height="60"
                Content="MyButton with MouseEnter"
                commands:MouseEnterCommand.Command="{Binding MouseEnterCommand}"
                commands:MouseEnterCommand.CommandParameter="{Binding RelativeSource={RelativeSource Self}}"
                />

In this case I think my Command parameter binding is wrong. Because my MouseEnterCommand class is getting parameter as a button. but in my view model, 

public void OnButtonMouseEnter(object obj) obj parameter is coming null.

Answer 1

 commands:MouseEnterCommand.Command="{Binding MouseEnterCommand}"

Alas this is giving error my  side  :

Error    1    'Command' is an undeclared prefix. Line 13, position 17. 

How is your code atleast running well ?

Answer 2

firtinalim

 commands:MouseEnterCommand.Command="{Binding MouseEnterCommand}"

Alas this is giving error my  side  :

Error    1    'Command' is an undeclared prefix. Line 13, position 17. 

How is your code atleast running well ?

MouseEnterCommand is a class that contains commands.

Answer 3

Please upload the relative project to skydrive.com and provide the link, then we try to help you.

There are some samples on how to use the DelegateCommand, you may refer them

http://www.johnpapa.net/5-simple-steps-to-commanding-in-silverlight/

http://relentlessdevelopment.wordpress.com/2010/03/30/simplified-mvvm-commanding-with-delegatecommand/

http://www.codeproject.com/Articles/79872/Step-by-Step-Guide-to-Silverlight-4-Command-Bindin