我创建了一个简单的MVVM wpf项目。基本思路是显示有关客户年收入和他在各个银行贷款的数据。
模型由2个类Financial和FinancialLoans组成。 ViewModel由2个类FinancialVM和FinancialLoanVM组成。
以下是VM类:
namespace WpfTester.ViewModel{
public class FinancialVM
{
public Model.Financial Financial { get; set; }
public ObservableCollection<ViewModel.FinancialLoanVM> FinancialLoanVMs { get; set; }
public FinancialVM()
{
//Fill the models with some sample data
Financial = new WpfTester.Model.Financial { Income = 1950.12 };
Financial.FinancialLoans = new ObservableCollection<Model.FinancialLoan>();
Financial.FinancialLoans.Add(new WpfTester.Model.FinancialLoan { Bank = new Random().Next().ToString() });
Financial.FinancialLoans.Add(new WpfTester.Model.FinancialLoan { Bank = new Random().Next().ToString() });
FinancialLoanVMs = new ObservableCollection<FinancialLoanVM>();
foreach (Model.FinancialLoan financialLoan in Financial.FinancialLoans)
{
FinancialLoanVMs.Add(new ViewModel.FinancialLoanVM { FinancialLoan = financialLoan });
}
} }
public class FinancialLoanVM
{
public Model.FinancialLoan FinancialLoan { get; set; }
public FinancialLoanVM()
{ FinancialLoan = new Model.FinancialLoan(); }
}
UI界面中有一个“Financial User Control”,它的数据上下文绑定到“FinancialVM”,还有一个“FinancialLoan User control”,其数据上下文绑定到“FinancialLoanVM”。
问题在于Listbox列表框,我已经将其模板化,以便将“FinancialLoans User Controls”作为项,但绑定的数据无法注入到“FinancialLoanUC”的数据上下文中。 我想关键在于ListBoxItem数据模板的部分。 您有什么好的想法可以让这个工作起来吗?
<UserControl.DataContext>
<ViewModel:FinancialVM/>
</UserControl.DataContext>
<Grid d:DataContext="{d:DesignInstance Type=ViewModel:FinancialVM}" >
<Grid.RowDefinitions>
<RowDefinition Height="23"/>
<RowDefinition/>
</Grid.RowDefinitions>
<StackPanel Grid.Row="0" Orientation="Horizontal">
<TextBlock Text="Income= "/>
<Label Content="{Binding Path=Financial.Income}"/>
</StackPanel>
<ListBox Grid.Row="1" ItemsSource="{Binding Path=FinancialLoanVMs}">
<ListBox.ItemTemplate>
<DataTemplate>
<View:FinancialLoanUC DataContext="{Binding }" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Grid>