Ich habe eine Aktion in meiner Ansicht nach Modell Rekord in Entity-Rahmen work.I hinzuzufügen haben eine Aktion, um die Datensätze in der Ansicht wie folgt angezeigt:INotifyPropertyChanged ist erfrischend, nicht meine Listview in WPF MVVM Entität
private void FillProspects()
{
var q = (from a in ctx2.Prospects// 'ctx' is the object of entity
select a).ToList();
this.Prospects = q; // 'Porspects' is a collection of entity class this I have bound with my List view in my view
}
Dies wird in der Konstruktion meines View-Modells aufgerufen. Als Ergebnis zeigt die Listenansicht in meiner Ansicht die Datensätze an. Ich habe eine Add Rekord Aktion in meiner Ansicht model..I geschaffen Eigenschaften meiner Meinung nach Modell in der Entity-Klasse zum Beispiel Eigenschaften erzeugt entsprechen:
private String _FirstName;
public String FirstName
{
get
{
return _FirstName;
}
set
{
_FirstName = value;
}
}
Und meine Add Rekord Aktion in der Ansicht Modell ist:
public void Add1()
{
newprospect = new Prospect();
newprospect.ID = Guid.NewGuid();
newprospect.FirstName = FirstName;
newprospect.LastName = LastName;
newprospect.Address = Address;
newprospect.State = State;
newprospect.City = City;
newprospect.ZIP = ZIP;
prospect = newprospect;
ctx2.AddToProspects(prospect);
FillProspects();
//RaisePropertyChanged("Prospects");
}
ich habe die geerbte: INotifyPropertyChanged
und importiert es
using System.Windows.Input;
public event PropertyChangedEventHandler PropertyChanged = delegate { };
private void RaisePropertyChanged(string property) { PropertyChanged(this, new PropertyChangedEventArgs(property)); }
Aber meine Benachrichtigung erfrischend ist nicht meine view Listview
Datensätze nach dem Hinzufügen von Datensatz .so Ich nenne nur die Fülle Datensätze Methode "FillProspects" in der Aktion addrecord..Ist das richtige Weg MVVM zu tun. Warum wird meine Listview nicht nach Datensatz hinzufügen Aktion, wo ich vermisse? Ich habe versucht, mit RaisePropertyChanged("Prospects");
im Add Rekord Aktion ... aber es ist nicht .So erfrischend ich nur Fill-Methode Aktion aufgerufen wieder
Meine komplette Ansicht Modell:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;
using System.Windows.Input;
using System.Collections.ObjectModel;
namespace Wpfentity3
{
public class frmProspects_VM : INotifyPropertyChanged
{
TestsEntities ctx2 = new TestsEntities();
public ObservableCollection<Prospect> prospects { get; set; }
//This is the collection where records - er, entities - returned by a query are stored;
//Prospect is the generated class that defines a record - er,
//an entity as well as the query for that table.
private CommandMap _Commands;
public CommandMap Commands { get { return _Commands; } }
Prospect newprospect;
//This holds a new prospect that is created and then added to the prospects collection
private Prospect _prospect;
public Prospect prospect {
get
{
return _prospect;
}
set
{
_prospect = value;
RaisePropertyChanged("prospect");
}
}
//prospect is the object that holds the current record from the Prospects table.
//MainWindow controls are bound to this object
public frmProspects_VM()
{
//FillProspects();
ctx2 = new TestsEntities();
//This instantiates the EntityManager class ;
prospects = new ObservableCollection<Prospect>();
//This instantiates the prospects collection of Prospect records - er, entities;
_Commands = new CommandMap();
_Commands.AddCommand("Add", x => Add1());
}
private ObservableCollection<Prospect> _prospects;
public ObservableCollection<Prospect> Prospects
{
get
{
return _prospects;
}
set
{
_prospects = value;
RaisePropertyChanged("Prospects");
}
}
private String _FirstName;
public String FirstName
{
get
{
return _FirstName;
}
set
{
_FirstName = value;
}
}
private String _LastName;
public String LastName
{
get
{
return _LastName;
}
set
{
_LastName = value;
}
}
private String _Address;
public String Address
{
get
{
return _Address;
}
set
{
_Address = value;
}
}
private String _State;
public String State
{
get
{
return _State;
}
set
{
_State = value;
}
}
private String _City;
public String City
{
get
{
return _City;
}
set
{
_City = value;
}
}
private String _ZIP;
public String ZIP
{
get
{
return _ZIP;
}
set
{
_ZIP = value;
}
}
public void Add1()
{
newprospect = new Prospect();
newprospect.ID = Guid.NewGuid();
newprospect.FirstName = FirstName;
newprospect.LastName = LastName;
newprospect.Address = Address;
newprospect.State = State;
newprospect.City = City;
newprospect.ZIP = ZIP;
prospect = newprospect;
ctx2.AddToProspects(prospect);
Prospects.Add(newprospect);
}
public event PropertyChangedEventHandler PropertyChanged = delegate { };
private void RaisePropertyChanged(string property) { PropertyChanged(this, new PropertyChangedEventArgs(property)); }
}
}
Meine Ansicht xamal :
<Window x:Class="Wpfentity3.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
WindowStartupLocation="CenterScreen"
Title="Prospects"
Height="482" Width="500" MaxWidth="500" MaxHeight="600"
xmlns:cusns="clr-namespace:Wpfentity3">
<StackPanel Height="290" VerticalAlignment="Top">
<StackPanel Orientation="Horizontal" >
<Label
Content="Prospects"
BorderBrush="Blue" BorderThickness="1"
HorizontalAlignment="Left" VerticalAlignment="Top"
FontSize="24" FontFamily="Comic Sans MS"
Padding="13,3,13,9" Margin="5"
Foreground="Purple" Background="LemonChiffon" />
<Label
Content="{Binding Path=label}" Foreground="Red" FontSize="14"
HorizontalAlignment="Right" VerticalAlignment="Center"
Height="auto" Margin="180,0,10,0" />
</StackPanel>
<Grid
HorizontalAlignment="Left" VerticalAlignment="Top"
Height="120" Width="475" >
<Grid.RowDefinitions>
<RowDefinition Height="25*" />
<RowDefinition Height="25*" />
<RowDefinition Height="25*" />
<RowDefinition Height="25*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="90*" />
<ColumnDefinition Width="135*" />
<ColumnDefinition Width="45*" />
<ColumnDefinition Width="32*" />
<ColumnDefinition Width="57*" />
<ColumnDefinition Width="118*" />
</Grid.ColumnDefinitions>
<Label
Content="First name"
Grid.Row="0" Grid.Column="0" Margin="0,0,5,0"
HorizontalAlignment="Right" VerticalAlignment="Center" />
<TextBox Name="txtFirstName"
Grid.Column="1"
HorizontalAlignment="Left" VerticalAlignment="Center" Text="{Binding Path=FirstName}"
Width="130" />
<Label
Content="Last name"
Grid.Row="1" Grid.Column="0" Margin="0,0,5,0"
HorizontalAlignment="Right" VerticalAlignment="Center" />
<TextBox Name="txtLastName"
Grid.Row="1" Grid.Column="1"
HorizontalAlignment="Left" VerticalAlignment="Center" Text="{Binding LastName}"
Width="130" />
<Label
Content="Address"
Grid.Row="2" Grid.Column="0" Margin="0,0,5,0"
HorizontalAlignment="Right" VerticalAlignment="Center" />
<TextBox Name="txtAddress"
Grid.Row="2" Grid.Column="1"
HorizontalAlignment="Left" VerticalAlignment="Center" Text="{Binding Address}"
Width="300" Grid.ColumnSpan="5" />
<Label
Content="City"
Grid.Row="3" Grid.Column="0" Margin="0,0,5,0"
HorizontalAlignment="Right" VerticalAlignment="Center" />
<TextBox Name="txtCity"
Grid.Row="3" Grid.Column="1"
HorizontalAlignment="Left" VerticalAlignment="Center" Text="{Binding City}"
Width="130" />
<Label
Content="State"
Grid.Row="3" Grid.Column="2" Margin="0,0,5,0"
HorizontalAlignment="Right" VerticalAlignment="Center" />
<TextBox Name="txtState"
Grid.Row="3" Grid.Column="3" Width="30" MaxLength="2" CharacterCasing="Upper" Text="{Binding State}"
HorizontalAlignment="Left" VerticalAlignment="Center" />
<Label
Content="ZIP code"
Grid.Row="3" Grid.Column="4" Margin="0,0,5,0"
HorizontalAlignment="Right" VerticalAlignment="Center" />
<TextBox Name="txtZIP"
Grid.Row="3" Grid.Column="5" MaxLength="10"
HorizontalAlignment="Left" VerticalAlignment="Center" Text="{Binding ZIP}"
Width="90" />
</Grid>
<StackPanel Orientation="Horizontal" Margin="0,10,0,0">
<Button Name="btnFind"
Content="_Find"
Width="auto" Margin="5,0,5,0" Padding="10,0,10,0" />
<Button Name="btnAdd"
Content="_Add" Command="{Binding Commands.Add}"
Width="auto" Margin="5,0,5,0" Padding="10,0,10,0" />
<Button Name="btnEdit"
Content="_Edit"
Width="auto" Margin="5,0,5,0" Padding="10,0,10,0" />
<Button Name="btnDelete"
Content="_Delete"
Width="auto" Margin="5,0,5,0" Padding="10,0,10,0" />
<Button Name="btnSave"
Content="_Save"
Width="auto" Margin="5,0,5,0" Padding="10,0,10,0" />
<Button Name="btnCancel"
Content="_Cancel"
Width="auto" Margin="5,0,5,0" Padding="10,0,10,0" />
<Button Name="btnClose"
Content="Cl_ose"
Width="auto" Margin="5,0,5,0" Padding="10,0,10,0"
/>
</StackPanel>
<StackPanel Height="34" Margin="10">
<Grid Margin="10">
<ListView Name="lvprospects" ItemsSource="{Binding Prospects}" Margin="0,0,0,-200">
<ListView.View>
<GridView>
<GridViewColumn Header="FirstName" Width="120" DisplayMemberBinding="{Binding FirstName}" />
<GridViewColumn Header="LastName" Width="50" DisplayMemberBinding="{Binding LastName}" />
<GridViewColumn Header="Address" Width="50" DisplayMemberBinding="{Binding Address}" />
<GridViewColumn Header="City" Width="50" DisplayMemberBinding="{Binding City}" />
<GridViewColumn Header="State" Width="50" DisplayMemberBinding="{Binding State}" />
<GridViewColumn Header="ZIP" Width="50" DisplayMemberBinding="{Binding ZIP}" />
</GridView>
</ListView.View>
</ListView>
</Grid>
</StackPanel>
</StackPanel>
Wenn Sie den neuen Datensatz nicht zur Sammlung hinzufügen, wie können Sie eine Aktualisierung des Steuerelements erwarten? –