如何使用MVVM将文章添加到列表中。 WPF C＃ [英] how to add a article to a list with MVVM. WPF C#
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问题描述
好的nigth人。
我在一个wpf项目（独立应用程序）中工作，最近我的老板告诉我应用MVVM模式，所以我有这么多问题，因为我不太了解它。现在我想知道如何使用Button将文章添加到listview中，我看到了很多教程，但无论如何都要解释一下。
非常感谢你。
解决方案
listview应该绑定到viewModel中的一个集合，该按钮应该在ViewModel中执行一个命令。
命令执行应该在集合中添加一篇文章。
因为列表视图绑定到集合，所以应该显示新条目。
好的，我理解你。看看我现在的代码并告诉我什么是错的，因为我认为我有它。
使用系统;
使用 System.Collections.Generic;
使用 System.Linq;
使用 System.Text;
使用 System.Threading.Tasks;
使用 System.ComponentModel;
使用 System.Windows.Input;
命名空间 CatalogoProductos
{
// 这是我的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 = < span class =code-string> Banda Sonora1}，
new Producto {Titulo = Pelicula2，Genero = Genero2，ActorPrincipal = 演员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（）;
}
返回 mAgregar;
}
set
{
mAgregar = value ;
}
}
private class AddPelicula：ICommand
{
public bool CanExecute（ object parametro）
{
return 真;
}
public event EventHandler CanExecuteChanged;
public void 执行（ object parametro）
{
}
}
}
}
< / < span class =code-leadattribute> producto > < / producto > < / producto > < / producto >
<！ - 这是我的观点结合。看看并帮助我。谢谢 - >
< grid >
< < span class =code-leadattribute> listview name = ListaPeliculas margin = 0,190,0,0 itemssource = {Binding Peliculas} >
< listview.view >
< gridview x：name = grdPeliculas xmlns：x = ＃未知 >
< gridviewcolumn header = Titulo displaymemberbinding = {Binding Titulo} width = 100 / >
< gridviewcolumn header = Genero displaymemberbinding = {Binding Genero} 宽度 = 100 / >
< gridviewcolumn header = Actor Principal displaymemberbinding = {Binding ActorPrincipal} width = 100 < span class =code-keyword> / >
< gridviewcolumn header = Director displaymemberbinding = {Binding Director} 宽度 = 100 / >
< gridviewcolumn header = 制作人 displaymemberbinding = {Binding Productor} width = 100 / >
< gridviewcolumn header = Banda Sonora displaymemberbinding = {Binding BandaSonora} width = 100 / >
< / gridview >
< / listview.view >
< / listview >
< < span class =code-leadattribute>按钮 内容 = Ingresar HorizontalAlignment = 左 保证金 = 380,86,0,0 VerticalAlignment = Top 宽度 = 115 命令 = {Binding Path = Agregar} / >
< textbox x：name = txtTitulo horizontalalignment = < span class =code-keyword>左 height = 23 margin = 149,7,0,0 textwrapping = 换行 verticalalignment = Top width = 195 text = {Binding ElementName = ListaPeliculas，Path = SelectedItem.Titulo} xmlns：x = ＃unknown / >
< textbox x：name = txtGenero horizontalalignment = 左 height = 23 margin = 149,37,0,0 textwrapping = 换行 verticalalignment = Top width = < span class =code-keyword> 195 text = {Binding ElementName = ListaPeliculas，Path = SelectedItem.Genero} xmlns：x = ＃unknown / >
< textbox x：name = txtActor horizontalalignment = 左 height = 23 margin = 149,70,0,0 textwrapping = 换行 verticalalignment = Top width = 195 text = {Binding ElementName = ListaPeliculas，Path = SelectedItem.ActorPrincipal} xmlns：x = ＃unknown / >
< 文本框 x：name = txtDirector horizontalalignment = 左 < span class =code-attribute> 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 = 左 height = 23 margin = 149,130,0， 0 textwrapping= 换行 verticalalignment = Top width = 195 text = {Binding ElementName = ListaPeliculas，Path = SelectedItem.Productor} xmlns ：x = ＃unknown / >
< textbox x：name = txtBanda horizontalalignment = 左 height = 23 margin = 149,162,0,0 textwrapping = Wrap < span class =code-attribute> verticalalignment = Top widt h = 195 text = {Binding ElementName = ListaPeliculas，Path = SelectedItem.BandaSonora} xmlns：x = ＃unknown / >
< Label 内容 = Titulo 名称 = lblTitutlo HorizontalAlignment = Left 保证金 = < span class =code-keyword> 6,7,0,0 VerticalAlignment = Top 宽度 = 108 / >
< 标签 内容 = Genero 名称 = lblGenero HorizontalAlignment = 左 保证金 = 6,34,0,0 VerticalAlignment = Top 宽度 = 108 / >
< 标签 内容 = Actor Principal 名称 = lblActor HorizontalAlignment = 左 保证金 = 6,67,0,0 VerticalAlignment < span class =code-keyword> = Top 宽度 = 108 / >
< 标签 内容 = Director 名称 = lblDirector HorizontalAlignment = 左 < span class =code-attribute> 保证金 = 6,98,0,0 VerticalAlignment = Top 宽度 = 108 / >
< 标签 内容 = 制作人 名称 = lblProductor HorizontalAlignment = 左 保证金 = 6,127,0,0 VerticalAlignment = Top 宽度 = 108 / >
< 标签 内容 = Banda Sonora 名称 = lblBanda HorizontalAlignment = 左 保证金 = 6,159,0,0 VerticalAlignment = Top 宽度 = 108 / >
< / grid >
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.
解决方案
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.
OK, I understand you. Look my current code and tell me whats is wrong because I think that I have it.
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>
<!--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>
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