WPF组合框的数据绑定填写选择项

Question

我需要填写我的组合框与我的部门清单，并设置组合框的所选项目和我的员工处

型号系

public class Department 
{ 
    public int Id { get; set; } 
    public string Name { get; set; } 
} 

模范员工：

public class Employee 
{ 
    public int Id { get; set; } 
    public string FirstName { get; set; } 
    public string LastName { get; set; } 
    public Department Department { get; set; } 
} 

视图模型

public class ViewModel 
{ 
    public Employee Employee { get; set; } 
    public ObservableCollection<Department> Departments{ get; set; } 

    public ViewModel() 
    { 
     Employee new Employee() 
     { 
      FirstName = "Harry", 
      LastName = "Park", 
      Department = new Department { Id = 1, Name = "Department 2" }, 
     }; 
     Departments= new ObservableCollection<Department>() 
     { 
      new Department{ Id=1, Name="Department 1" }, 
      new Department{ Id=2, Name="Department 2" }, 
      new Department{ Id=2, Name="Department 3" }, 
     }; 
} 

XAML

 <Grid DataContext="{StaticResource ViewModel 
       <ComboBox 
       ItemsSource="{Binding Department 
       SelectedValue="{Binding Employee.Department 
       <ComboBox.ItemTemplate> 
        <DataTemplate> 
         <StackPanel> 
          <TextBlock Text="{Binding Name}" /> 
         </StackPanel> 
        </DataTemplate> 
       </ComboBox.ItemTemplate> 
      </ComboBox> 
     </Grid> 

你能帮助我吗？

Answer 1

此代码的工作 - 是真正的考验：

public partial class MainWindow : Window 
{ 
    public MainWindow() 
    { 
     InitializeComponent(); 
     this.DataContext = new ViewModel(); 
    } 
} 

public class Department 
{ 
    public int Id { get; set; } 
    public string Name { get; set; } 
} 

public class Employee 
{ 
    public int Id { get; set; } 
    public string FirstName { get; set; } 
    public string LastName { get; set; } 
    public Department Department { get; set; } 
} 


public class ViewModel 
{ 
    public Employee Employee { get; set; } 
    public ObservableCollection<Department> Departments { get; set; } 

    public ViewModel() 
    { 
     Departments = new ObservableCollection<Department>() 
     { 
      new Department{ Id=1, Name="Department 1" }, 
      new Department{ Id=2, Name="Department 2" }, 
      new Department{ Id=2, Name="Department 3" }, 
     }; 
     Employee = new Employee() 
     { 
      FirstName = "Harry", 
      LastName = "Park", 
      Department = Departments.First(), 
     }; 
    } 


<Grid> 
    <ComboBox Height="30" 
      ItemsSource="{Binding Departments}" 
      SelectedValue="{Binding Employee.Department}"> 
     <ComboBox.ItemTemplate> 
      <DataTemplate> 
       <StackPanel> 
        <TextBlock Text="{Binding Name}" /> 
       </StackPanel> 
      </DataTemplate> 
     </ComboBox.ItemTemplate> 
    </ComboBox> 
</Grid> 

Answer 2

<Grid DataContext="{StaticResource ViewModel}"> 
    <ComboBox ItemsSource="{Binding Departments}" 
      SelectedItem="{Binding Employee.Department}" 
     <ComboBox.ItemTemplate> 
      <DataTemplate> 
       <StackPanel> 
        <TextBlock Text="{Binding Name}" /> 
       </StackPanel> 
      </DataTemplate> 
     </ComboBox.ItemTemplate> 
    </ComboBox> 
</Grid>