【发布时间】：2014-07-08 12:54:50
【问题描述】：
我正在尝试使用 silverlight-c# 实现 MVVM 方法（不使用 Galla 或 prism 或任何内置的东西）。
我必须做的： （我在第一个视图中有一个按钮，在该按钮下方有一个网格，它将用于很快显示一个列表）。当我按下一个按钮时，它会弹出一个表单，我在上面 将输入信息，该信息应该显示在“Programs图像1中的文本”下方区域的列表中
我所做的是：
我已成功创建按钮单击事件并读取用户从表单写入的数据。现在的问题是我无法在 **Programs 区域呈现用户从该表单读取的数据。
在这里你可以看到我有下面的区域程序，并且有：姓名、作者和创建日期等等。就在下面，我想在单击按钮（“添加程序”按钮）获得的表单上显示我要从用户那里读取的数据。
（“添加程序”是要点击的按钮） 点击我得到：
ProgramGrid.xaml 中用于绑定的代码
<UserControl
x:Class="DEV_CENTER.ProgramGrid"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:System="clr-namespace:System;assembly=mscorlib"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data"
xmlns:dataprimitives="clr-namespace:System.Windows.Controls.Primitives;assembly=System.Windows.Controls.Data"
xmlns:local="clr-namespace:DEV_CENTER"
xmlns:vm="clr-namespace:ViewModel;assembly=ViewModel"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="400" >
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"></RowDefinition>
<RowDefinition Height="Auto"></RowDefinition>
<RowDefinition Height="Auto"></RowDefinition>
<RowDefinition Height="Auto"></RowDefinition>
<RowDefinition Height="*"></RowDefinition>
</Grid.RowDefinitions>
<Grid Grid.Row="0" Margin="5 5 5 20" Background="White">
<TextBox Text="">
<TextBox.Background>
<ImageBrush ImageSource="Images/search_icon.png" Stretch="None" AlignmentX="Right" />
</TextBox.Background>
</TextBox>
</Grid>
<Button Click="OnClick" Grid.Row="1" Height="25" >Add Programs</Button>
<TextBlock Text="Programs" Grid.Row="2" FontWeight="Bold"/>
<data:DataGrid Grid.Row="3" x:Name="gridPrograms" SelectedItem="{Binding SelectedProgram, Mode=TwoWay}"
AutoGenerateColumns="False" ItemsSource="{Binding Programs}" IsReadOnly="True">
<data:DataGrid.Columns>
<data:DataGridTextColumn Header="Name" Binding="{Binding Path=Name}" Width="3*"></data:DataGridTextColumn>
<data:DataGridTextColumn Header="Author" Binding="{Binding Path=Author}" Width="2*" ></data:DataGridTextColumn>
<data:DataGridTextColumn Header="Date Creation" Binding="{Binding Path=DateCreation}" Width="3*"></data:DataGridTextColumn>
</data:DataGrid.Columns>
</data:DataGrid>
</Grid>
</UserControl>
ProgramGrid.xaml.cs 的代码：
namespace DEV_CENTER
{
public partial class ProgramGrid : UserControl
{
public ProgramGrid()
{
InitializeComponent();
this.DataContext = AddButtonViewModel.getInstance();
}
private void OnClick(object sender, System.Windows.RoutedEventArgs e)
{
AddButton addProgramObj = new AddButton(); //Because AddButton is my xaml childwindow
addProgramObj.Show();
}
}
}
AddButton.xaml 和 AddButton.cs 的按钮代码没有问题（我的意思是我在按钮单击时获得的表单上输入的所有数据在调试时的相应字段（名称、作者等）上可见）。
AddButton.cs ：
namespace DEV_CENTER
{
public partial class AddButton : ChildWindow
{
public AddButton()
{
this.DataContext = AddButtonViewModel.getInstance();
InitializeComponent();
}
}
}
AddButtonViewModel.cs 是我的视图模型类。 我猜是有问题。
namespace ViewModel
{
public class AddButtonViewModel : GenericViewModel
{
private static AddButtonViewModel addbuttonviewModel;
public static AddButtonViewModel getInstance()
{
if (addbuttonviewModel == null) addbuttonviewModel = new AddButtonViewModel();
return addbuttonviewModel;
}
#region PROPERTIES
private ObservableCollection<AddButtonViewModel> programs; //Its obtained for binding from ProgramGrid.xaml
public ObservableCollection<AddButtonViewModel> Programs
{
get { return this.programs; }
set { this.programs = value; OnPropertyChanged("Programs"); }
}
private String name;
public String Name
{
get { return name; }
set { name = value; OnPropertyChanged("Name"); }
}
private String version;
public String Version
{
get { return version; }
set { version = value; OnPropertyChanged("Version"); }
}
private String author;
public String Author
{
get { return author; }
set { author = value; OnPropertyChanged("Author"); }
}
private String company;
public String Company
{
get { return company; }
set { company = value; OnPropertyChanged("Company"); }
}
private String dateCreation;
public String DateCreation
{
get { return dateCreation; }
set { dateCreation = value; OnPropertyChanged("DateCreation"); }
}
private String description;
public String Description
{
get { return description; }
set { description = value; OnPropertyChanged("Description"); }
}
private ICommand saveCmd; ITS for Save Button click after writing the data on form popuped.
public ICommand SaveCmd
{
get { return saveCmd; }
set { saveCmd = value; }
}
private ICommand cancelCmd;
public ICommand CancelCmd
{
get { return cancelCmd; }
set { cancelCmd = value; }
}
#endregion
#region CONSTRUCTOR
public AddButtonViewModel()
{
this.saveCmd = new DelegateCommand(SaveMetadata);
this.cancelCmd = new DelegateCommand(CancelMetadata);
}
#endregion
#region method
/*
* save from Form
*/
public void SaveMetadata(object param) //i can see on debugging that i have all the fields thati have saved in form
{
programs = new ObservableCollection<AddButtonViewModel>();
AddButtonViewModel p1 = new AddButtonViewModel();
p1.Name = Name;
p1.Author = Author;
p1.Company = Company;
p1.Description = Description;
p1.DateCreation = DateCreation;
Programs.Add(p1);
}
/*
* cancel modification action
*/
public void CancelMetadata(object param)
{
initForm();
}
#endregion
}
}
如何处理我的 AddButtonViewModel.cs 类，以便我能够以完全相同的方式呈现 Programs 下面的 List（包含从 Form 保存的数据）？
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标签： c# .net wpf silverlight mvvm