Question

我有一个列表视图。我想获得所选员工的ID。我以为Selected Employee会给出所选行的所有细节然后我可以通过SelectedEmployee.EmpId获取Id。它不起作用

这是我的XAML：

<ListView Grid.Row="1" Name="listViewTask" ItemsSource="{Binding Employees}" SelectedItem="{Binding SelectedEmployee, Mode=TwoWay}"  Margin="1,25,0,10" Foreground="Black" SelectionChanged="ListView_SelectionChanged" Grid.ColumnSpan="2" >
        <ListView.View  >
            <GridView  >
        <GridViewColumn Header="EmpId" Width="100" DisplayMemberBinding="{Binding EmpId}"/>
                    <GridViewColumn Header="Created Date" Width="100" DisplayMemberBinding="{Binding created_date}"/>

    </GridView>
        </ListView.View>

    </ListView>

这是我在ViewModel中的属性：

private string selectedEmployee;
public string SelectedEmployee
{
    get { return this.selectedEmployee; }  
    set
    {
        // Implement with property changed handling for INotifyPropertyChanged

        if (!string.Equals((this.selectedEmployee), value))  
        {
            this.selectedEmployee = value;
            this.RaisePropertyChanged(selectedEmployee); // Method to raise the PropertyChanged event in your BaseViewModel class...
        }
    }
}

Answer 1

根据您提供的代码，SelectedEmployee的类型为字符串。使用这样的代码无法实现您尝试实现的方式。要么你错了，要么你需要了解更多关于WPF / MVVM的知识。我希望Employees也是IEnumerable<String>类型。

如果您想从所选项目中获取所选员工ID，请首先为员工创建此类数据类

public class EmployeeData : INotifyPropertyChanged
{
        public event PropertyChangedEventHandler PropertyChanged;

        private Guid empID;

        public Guid EmpId
        {
            get { return empID; }
            set
            {
                empID = value;
                RaisePropertyChanged(empID);
            }
        }

        private string empName;

        public string EmpName
        {
            get { return empName; }
            set
            {
                empName = value;
                RaisePropertyChanged(empName);
            }
        }
}

然后在你的viewmodel中创建一个这样的列表并将其作为列表框的itemsource：

private ObservableCollection<EmployeeData> employees;
public ObservableCollection<EmployeeData> Employees
{    
    get
    {
        return employees;
    }    
    set
    {
        employees = value;
        RaisePropertyChanged(“employees”);
    }    
}

还有一个属性来保存所选项目：

private EmployeeData selectedEmployee;
public EmployeeData SelectedEmployee
{
    get { return this.selectedEmployee; }  
    set
    {
        // Implement with property changed handling for INotifyPropertyChanged

        if (!string.Equals((this.selectedEmployee), value))  
        {
            this.selectedEmployee = value;
            this.RaisePropertyChanged(selectedEmployee); // Method to raise the PropertyChanged event in your BaseViewModel class...
        }
    }
}

确保selectedEmployee的类型为EmployeeData，而不是字符串。现在，您可以访问ID SelectedEmployee.EmpID

等ID

从WPF中的Listview获取viewmodel中的SelectedItem

1 个答案: