how to add a article to a list with MVVM. WPF C#

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Good nigth people.

Im working in a wpf project(Standalone App) for my job and recently my boss told me that apply MVVM pattern, so I have so many questions because I dont understand it so much. Now I wanna know how to add a article to a listview with a Button, I saw so much tutorials but anyway explain about that.

Thank you so much.

Posted 9-Dec-13 17:19pm

Member 10360777

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2 solutions

Solution 2

OK, I understand you. Look my current code and tell me whats is wrong because I think that I have it.

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.ComponentModel;
using System.Windows.Input;


namespace CatalogoProductos
{
    //This is my ViewModel
    public class ProductoViewModel
    {
        private IList<producto> mPelicula;
        public ProductoViewModel()
        {
            mPelicula = new List<producto>
            {
                new Producto {Titulo="Pelicula1",Genero="Genero1",ActorPrincipal="Actor Principal1",Director="Director1",Productor="Productor1",BandaSonora="Banda Sonora1"},
                new Producto {Titulo="Pelicula2",Genero="Genero2",ActorPrincipal="Actor Principal2",Director="Director2",Productor="Productor2",BandaSonora="Banda Sonora2"},
            };
        }

        public IList<producto> Peliculas
        {
            get {
                return mPelicula;
            }
            set {
                mPelicula = value;
            }
        }

        public IList<producto> mNuevaPelicula;
        private ICommand mAgregar;
        public ICommand Agregar
        {
            get {
                    if (mAgregar == null)
                    {
                       mAgregar = new AddPelicula();
                    }
                    return mAgregar;
                }
            set
            {
                mAgregar = value;
              
            }
        }

        private class AddPelicula : ICommand
        {
            
            public bool CanExecute(object parametro)
            {
                return true;
            }
            public event EventHandler CanExecuteChanged;
            public void Execute(object parametro)
            {
            }
        }
    }
}
</producto></producto></producto></producto>

XAML

<!--AND THIS IS MY VIEW WITH THE BINDINGS. LOOK IT AND HELP ME PLEASE. THANK YOU-->
<grid>   
         <listview name="ListaPeliculas" margin="0,190,0,0" itemssource="{Binding Peliculas}">
            <listview.view>
                <gridview x:name="grdPeliculas" xmlns:x="#unknown">
                    <gridviewcolumn header="Titulo" displaymemberbinding="{Binding Titulo}" width="100" />
                    <gridviewcolumn header="Genero" displaymemberbinding="{Binding Genero}" width="100" />
                    <gridviewcolumn header="Actor Principal" displaymemberbinding="{Binding ActorPrincipal}" width="100" />
                    <gridviewcolumn header="Director" displaymemberbinding="{Binding Director}" width="100" />
                    <gridviewcolumn header="Productor" displaymemberbinding="{Binding Productor}" width="100" />
                    <gridviewcolumn header="Banda Sonora" displaymemberbinding="{Binding BandaSonora}" width="100" />
                </gridview>
            </listview.view>
        </listview>
        <Button Content="Ingresar" HorizontalAlignment="Left" Margin="380,86,0,0" VerticalAlignment="Top" Width="115" Command="{Binding Path=Agregar}" />
        <textbox x:name="txtTitulo" horizontalalignment="Left" height="23" margin="149,7,0,0" textwrapping="Wrap" verticalalignment="Top" width="195" text="{Binding ElementName=ListaPeliculas, Path=SelectedItem.Titulo}" xmlns:x="#unknown" />
        <textbox x:name="txtGenero" horizontalalignment="Left" height="23" margin="149,37,0,0" textwrapping="Wrap" verticalalignment="Top" width="195" text="{Binding ElementName=ListaPeliculas, Path=SelectedItem.Genero}" xmlns:x="#unknown" />
        <textbox x:name="txtActor" horizontalalignment="Left" height="23" margin="149,70,0,0" textwrapping="Wrap" verticalalignment="Top" width="195" text="{Binding ElementName=ListaPeliculas, Path=SelectedItem.ActorPrincipal}" xmlns:x="#unknown" />
        <textbox x:name="txtDirector" horizontalalignment="Left" height="23" margin="149,100,0,0" textwrapping="Wrap" verticalalignment="Top" width="195" text="{Binding ElementName=ListaPeliculas, Path=SelectedItem.Director}" xmlns:x="#unknown" />
        <textbox x:name="txtProductor" horizontalalignment="Left" height="23" margin="149,130,0,0" textwrapping="Wrap" verticalalignment="Top" width="195" text="{Binding ElementName=ListaPeliculas, Path=SelectedItem.Productor}" xmlns:x="#unknown" />
        <textbox x:name="txtBanda" horizontalalignment="Left" height="23" margin="149,162,0,0" textwrapping="Wrap" verticalalignment="Top" width="195" text="{Binding ElementName=ListaPeliculas, Path=SelectedItem.BandaSonora}" xmlns:x="#unknown" />
        <Label Content="Titulo" Name="lblTitutlo" HorizontalAlignment="Left" Margin="6,7,0,0" VerticalAlignment="Top" Width="108"/>
        <Label Content="Genero" Name="lblGenero" HorizontalAlignment="Left" Margin="6,34,0,0" VerticalAlignment="Top" Width="108"/>
        <Label Content="Actor Principal" Name="lblActor" HorizontalAlignment="Left" Margin="6,67,0,0" VerticalAlignment="Top" Width="108"/>
        <Label Content="Director" Name="lblDirector" HorizontalAlignment="Left" Margin="6,98,0,0" VerticalAlignment="Top" Width="108"/>
        <Label Content="Productor" Name="lblProductor" HorizontalAlignment="Left" Margin="6,127,0,0" VerticalAlignment="Top" Width="108"/>
        <Label Content="Banda Sonora" Name="lblBanda" HorizontalAlignment="Left" Margin="6,159,0,0" VerticalAlignment="Top" Width="108"/>
    </grid>

Posted 10-Dec-13 5:16am

Member 10360777

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_Maxxx_ · Accepted Answer · 2013-12-09T19:33:00

Solution 1

The listview should be bound to a collection in the viewModel, the button should execute a command in the ViewModel.

The command execution should add an article to the collection.

Because the list view is bound to the collection, the new entry should be shown.

Posted 9-Dec-13 19:33pm

_Maxxx_

Comments

Member 10360777 10-Dec-13 11:15am

OK, I understand you. Look my current code and tell me whats is wrong because I think that I have it.

<pre lang="c#">
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.ComponentModel;
using System.Windows.Input;

namespace CatalogoProductos
{
//This is my ViewModel
public class ProductoViewModel
{
private IList<Producto> mPelicula;
public ProductoViewModel()
{
mPelicula = new List<Producto>
{
new Producto {Titulo="Pelicula1",Genero="Genero1",ActorPrincipal="Actor Principal1",Director="Director1",Productor="Productor1",BandaSonora="Banda Sonora1"},
new Producto {Titulo="Pelicula2",Genero="Genero2",ActorPrincipal="Actor Principal2",Director="Director2",Productor="Productor2",BandaSonora="Banda Sonora2"},
};
}

public IList<Producto> Peliculas
{
get {
return mPelicula;
}
set {
mPelicula = value;
}
}

public IList<Producto> mNuevaPelicula;
private ICommand mAgregar;
public ICommand Agregar
{
get {
if (mAgregar == null)
{
mAgregar = new AddPelicula();
}
return mAgregar;
}
set
{
mAgregar = value;

}
}

private class AddPelicula : ICommand
{

public bool CanExecute(object parametro)
{
return true;
}
public event EventHandler CanExecuteChanged;
public void Execute(object parametro)
{
}
}
}
}
</pre>

<pre lang="xaml">


<grid>
<ListView Name="ListaPeliculas" Margin="0,190,0,0" ItemsSource="{Binding Peliculas}" >
<ListView.View>
<gridview x:name="grdPeliculas">
<gridviewcolumn header="Titulo" displaymemberbinding="{Binding Titulo}" width="100">
<gridviewcolumn header="Genero" displaymemberbinding="{Binding Genero}" width="100">
<gridviewcolumn header="Actor Principal" displaymemberbinding="{Binding ActorPrincipal}" width="100">
<gridviewcolumn header="Director" displaymemberbinding="{Binding Director}" width="100">
<gridviewcolumn header="Productor" displaymemberbinding="{Binding Productor}" width="100">
<gridviewcolumn header="Banda Sonora" displaymemberbinding="{Binding BandaSonora}" width="100">

</ListView.View>
</ListView>
<Button Content="Ingresar" HorizontalAlignment="Left" Margin="380,86,0,0" VerticalAlignment="Top" Width="115" Command="{Binding Path=Agregar}" />
<textbox x:name="txtTitulo" horizontalalignment="Left" height="23" margin="149,7,0,0" textwrapping="Wrap" verticalalignment="Top" width="195" text="{Binding ElementName=ListaPeliculas, Path=SelectedItem.Titulo}">
<textbox x:name="txtGenero" horizontalalignment="Left" height="23" margin="149,37,0,0" textwrapping="Wrap" verticalalignment="Top" width="195" text="{Binding ElementName=ListaPeliculas, Path=SelectedItem.Genero}">
<textbox x:name="txtActor" horizontalalignment="Left" height="23" margin="149,70,0,0" textwrapping="Wrap" verticalalignment="Top" width="195" text="{Binding ElementName=ListaPeliculas, Path=SelectedItem.ActorPrincipal}">