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MVVM Pattern in asp.net web application

Posted on 2010-09-15
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Last Modified: 2013-11-07
Hi

I have a web application in which I want to implement MVVM pattern. I want to know if there any sample code that will clearly mention what all steps I need to execute to implement it.


Apart from that I want to know if there is any dll that need to be refered.

Kindly advice

Regards
Karan Gupta
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Question by:KaranGupta
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by:Dhaest
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by:KaranGupta
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Hi

I am trying to implement the code(please check the code section).  I am getting the compile time error

1. INotifyPropertyChanged is not defined.
2. Application is not declared
3. Type PropertyChangedEventHandler is not defined.

Is there any namespace that I am missing,

Regards
Karan Gupta
Imports Microsoft.VisualBasic



Public Class ViewModelBase

    Inherits INotifyPropertyChanged



    Protected Sub OnNotifyPropertyChanged(ByVal p As String)

        RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(p))

    End Sub



    Public ReadOnly Property IsDesignTime() As Boolean

        Get

            Return (Application.Current Is Nothing) OrElse (Application.Current.[GetType]() = GetType(Application))

        End Get

    End Property



#Region "INotifyPropertyChanged Members"

    Public Event PropertyChanged As PropertyChangedEventHandler

#End Region





End Class

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by:KaranGupta
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Hi

I have included System.ComponentModel namespace but still I am getting the same error. Please check the code attached.


Regards
Karan Gupta

Imports Microsoft.VisualBasic

Imports System.ComponentModel





Public Class ViewModelBase

    Inherits INotifyPropertyChanged



    Protected Sub OnNotifyPropertyChanged(ByVal p As String)

        RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(p))

    End Sub



    Public ReadOnly Property IsDesignTime() As Boolean

        Get

            Return (Application.Current Is Nothing) OrElse (Application.Current.[GetType]() = GetType(Application))

        End Get

    End Property



#Region "INotifyPropertyChanged Members"

    Public Event PropertyChanged As PropertyChangedEventHandler

#End Region





End Class

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Author Comment

by:KaranGupta
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Hi

As the tutorial given in

http://weblogs.asp.net/dwahlin/archive/2009/12/08/getting-started-with-the-mvvm-pattern-in-silverlight-applications.aspx

there has to be View, Model and View Model that is what MVVM pattern is all about. If I am making a contact us page then I have a textbox. In the view i.e. .aspx page I will put all the UI part. In the view model it should be properties . When it comes to Business logic out all the logic in the Model.

I have some queries

1. Is what I have written is correct?
2. View model should be inherited from ViewModelBase class. Am I right(Please check code section)?
3. Is the model class should be inherited from some class?

Kindly advice

Regards
Karan Gupta
Imports System.ComponentModel



Public Class ViewModelBase

    Implements INotifyPropertyChanged



    Public Event PropertyChanged As PropertyChangedEventHandler _

        Implements INotifyPropertyChanged.PropertyChanged



    Private Sub NotifyPropertyChanged(ByVal info As String)

        RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(info))

    End Sub

End Class

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by:KaranGupta
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Hi

Can we application MVVM pattern in simple asp.net application without using silverlight?


Regards
Karan Gupta
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by:KaranGupta
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Hi

Any updates?

Regards
Karan Gupta
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by:Dhaest
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by:Gautham Janardhan
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MVVM was designed keeping Silver light /  WPF in mind so i don't think you will be able to utilize it in Asp.net. You may either look into MVP as Dhaest suggested  or better go for MVC
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