如何使用Caliburn Micro从DataGrid选定行设置ViewModel属性

这不是Calibro,但你说没问题。

我删除了sessionmins和sessionamout属性以缩短答案,您可以像添加其他属性一样添加它。

首先,我将inotifypropertychanged添加到模型中,还为属性(大写)创建pascalcase。帕斯卡酶是不需要的,但它是最常见的约定。

public class PackageModel : INotifyPropertyChanged
    {
        private int _Id;
        public int Id
        {
            get { return _Id; }
            set
            {
                if (value != _Id)
                {
                    _Id = value;
                    NotifyPropertyChanged();
                }
            }
        }

        private string _SessionName;
        public string SessionName
        {
            get { return _SessionName; }
            set
            {
                if (value != _SessionName)
                {
                    _SessionName = value;
                    NotifyPropertyChanged();
                }
            }
        }

        private bool _IsActive;
        public bool IsActive
        {
            get { return _IsActive; }
            set
            {
                if (value != _IsActive)
                {
                    _IsActive = value;
                    NotifyPropertyChanged();
                }
            }
        }


        public event PropertyChangedEventHandler PropertyChanged;
        private void NotifyPropertyChanged([CallerMemberName] String propertyName = "")
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }

我将vm修改为只有包列表和selectedpackage,从名称包中删除列表并使其成为复数外接程序。还可以创建一些默认的构造函数来填充开发人员列表。正如您所建议的,现在不需要额外的属性,稍后只需使用selectedpackage。

    public class MainViewModel : INotifyPropertyChanged
    {
        public MainViewModel()
        {
            Packages = new List<PackageModel>()
            {
                new PackageModel()
                {
                    Id = 1, SessionName="Session1", IsActive = true
                },
                new PackageModel()
                {
                    Id = 2, SessionName="Session2", IsActive = false
                }
            };
        }

        private PackageModel _SelectedPackage;
        public PackageModel SelectedPackage
        {
            get { return _SelectedPackage; }
            set
            {
                if (value != _SelectedPackage)
                {
                    _SelectedPackage = value;
                    NotifyPropertyChanged();
                }
            }
        }

        private List<PackageModel> _Packages;
        public List<PackageModel> Packages
        {
            get { return _Packages; }
            set
            {
                if (value != _Packages)
                {
                    _Packages = value;
                    NotifyPropertyChanged();
                }
            }
        }


        public event PropertyChangedEventHandler PropertyChanged;
        private void NotifyPropertyChanged([CallerMemberName] String propertyName = "")
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }

并添加视图。进行手动绑定。当您更改网格中的项目时,文本框和复选框将自动更新,如果您更改文本框或复选框中的值,它也将更新数据报。

<Window.DataContext>
    <local:MainViewModel/>
</Window.DataContext>
<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto"></RowDefinition>
        <RowDefinition Height="Auto"></RowDefinition>
        <RowDefinition Height="Auto"></RowDefinition>
    </Grid.RowDefinitions>
    <TextBox Width="210" Margin="5 5" HorizontalAlignment="Left" Grid.Row="0" Grid.Column="0" Text="{Binding SelectedPackage.SessionName, Mode=TwoWay}"/>
    <StackPanel Grid.Row="1">
        <CheckBox Margin="5 5" Content="Is Active?" IsChecked="{Binding SelectedPackage.IsActive, Mode=TwoWay}"/>

    </StackPanel>
    <DataGrid ItemsSource="{Binding Packages,Mode=TwoWay,NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged }" 
          SelectedItem="{Binding SelectedPackage, Mode=TwoWay}"
          Grid.Row="2"
          AutoGenerateColumns="False"
          CanUserAddRows="False"
          CanUserDeleteRows="False"
          CanUserSortColumns="False"
          CanUserReorderColumns="False"
          CanUserResizeRows="False">
        <DataGrid.Columns>
            <DataGridTextColumn Header="ID" Binding="{Binding Id}" Visibility="Hidden" IsReadOnly="True"/>
            <DataGridTextColumn Header="Name" Binding="{Binding SessionName}" Width="120" IsReadOnly="True"/>
            <DataGridCheckBoxColumn IsReadOnly="True" Header="Is Active?" Binding="{Binding IsActive}" Width="*"/>
        </DataGrid.Columns>
    </DataGrid>

</Grid>

如果解决方案对您有效,请通知我!

你可以把 Text 属性显式转换为相应的源属性(并移除 Amount 属性),例如:

<TextBox Width="100" x:Name="Amount" Margin="5 5" Text="{Binding SelectedPackage.sessionAmount}" />

或者可以在视图模型中设置相应的源属性:

private PackageModel _selectedPackage;
public PackageModel SelectedPackage
{
    get
    {
        return _selectedPackage;
    }
    set
    {
        _selectedPackage = value;
        NotifyOfPropertyChange(() => SelectedPackage);
        if (_selectedPackage != null)
        {
            Amount = _selectedPackage.sessionAmount;
            //...
        }
        else
        {
            Amount = default(int);
        }
    }
}