WPF 在 DataGrid 中绑定 SelectedItem [英] WPF Binding SelectedItem in DataGrid
问题描述
所以,我有一个 TabControl 绑定到一个项目列表(每个选项卡都是一个项目) - 工作正常.每个选项卡的内容是一个带有项目员工列表的 DataGrid - 也可以正常工作.现在,我想显示当前在 DataGrid 上选择的员工的一些信息.这是一些代码:MainWindow.xaml 文件:
So, I have a TabControl binded to a list of projects (each tab is a one project) - that works fine. The content of each tab is a DataGrid with a list of project's employees - that works fine as well. Now, I want to show some information on employee currently selected on DataGrid. Here's some code: MainWindow.xaml file:
<Window.Resources>
<DataTemplate x:Key="ItemTemplate">
<TextBlock Text="{Binding Name}" />
</DataTemplate>
<DataTemplate x:Key="ContentTemplate">
<DataGrid ItemsSource="{Binding Employees}" SelectedItem="{Binding SelectedEmployee, Mode=TwoWay}" SelectionMode="Extended" SelectionUnit="FullRow" Name="employeesList">
</DataGrid>
</DataTemplate>
</Window.Resources>
之后,我想通过简单地将其写入标签来测试此绑定:
and later, I want to test this binding by simply writing it in label:
<Label Name="emp" Content="{Binding SelectedEmployee}"></Label>
和 MainWindowViewModel:
and MainWindowViewModel:
public Employee SelectedEmployee { get { return selectedEmployee; }
set
{
if (selectedEmployee != value)
{
selectedEmployee = value;
NotifyPropertyChanged("SelectedEmployee");
}
}
}
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged(String info)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(info));
}
}
我是 WPF 的新手,我已经阅读了一些提示,但它们没有帮助.标签emp"不显示任何内容.我错过了什么?
I am kind of a newbie to WPF, I've read some tips but they don't help. The label 'emp' does not show anything. What am I missing?
推荐答案
你没有通知你的属性已经改变,试试这个
You are not notifying that your property has changed, Try this
public Employee SelectedEmployee
{
get { return selectedEmployee; }
set
{
if (selectedEmployee != value)
{
selectedEmployee = value;
LastName = value;
NotifyPropertyChanged("SelectedEmployee"); //NotifyPropertyChanged("SelectedItem");
}
}
}
测试:
<Window x:Class="WpfApplication6.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApplication6"
Title="MainWindow" Height="350" Width="763" Name="UI" >
<Window.Resources>
<DataTemplate x:Key="ItemTemplate">
<TextBlock Text="{Binding Name}" />
</DataTemplate>
</Window.Resources>
<Grid>
<DataGrid ItemsSource="{Binding ElementName=UI,Path=Employees}" SelectedItem="{Binding ElementName=UI,Path=SelectedEmployee}" SelectionMode="Extended" SelectionUnit="FullRow" Name="employeesList" Margin="0,41,0,0" />
<Label Content="{Binding ElementName=UI,Path=SelectedEmployee.Name}" Height="28" HorizontalAlignment="Left" Name="label1" VerticalAlignment="Top" Width="288" />
<Label Content="{Binding ElementName=employeesList,Path=SelectedItem.Name}" Height="28" HorizontalAlignment="Left" Name="label2" VerticalAlignment="Top" Width="288" Margin="294,0,0,0" />
</Grid>
</Window>
代码:
public partial class MainWindow : Window, INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
private ObservableCollection<Employee> _employees = new ObservableCollection<Employee>();
private Employee _selectedEmployee;
public MainWindow()
{
InitializeComponent();
Employees.Add(new Employee { Name = "sa_ddam213" });
}
public ObservableCollection<Employee> Employees
{
get { return _employees; }
set { _employees = value; }
}
public Employee SelectedEmployee
{
get { return _selectedEmployee; }
set { _selectedEmployee = value; NotifyPropertyChanged("SelectedEmployee"); }
}
/// <summary>
/// Notifies the property changed.
/// </summary>
/// <param name="info">The info.</param>
public void NotifyPropertyChanged(String info)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(info));
}
}
}
public class Employee
{
public string Name { get; set; }
}
这似乎按预期工作,还是我遗漏了什么?
This seems to work as expected, or am I missing something?
这篇关于WPF 在 DataGrid 中绑定 SelectedItem的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!