通过键绑定从Datagrid传递命令参数(Passing a Command Parameter from a Datagrid through a Keybinding)

通过键绑定从Datagrid传递命令参数(Passing a Command Parameter from a Datagrid through a Keybinding)

我有一个wpf特定的问题。 我试图从Datagrid中删除一行，方法是定义一个Keybinding，将所选的Datagrid行作为Command参数传递给Command。

这是我的键盘绑定：

<UserControl.Resources > <Commands:CommandReference x:Key="deleteKey" Command="{Binding DeleteSelectedCommand}"/> </UserControl.Resources> <UserControl.InputBindings> <KeyBinding Key="D" Modifiers="Control" Command="{StaticResource deleteKey}"/> </UserControl.InputBindings>

我知道这基本上可行，因为我可以调试到DeleteSelectedCommand。 但是，由于DeleteSelectedCommand会将数据行的行删除为Call Parameter，所以会出现异常。

如何通过键绑定传递SelectedRow？

我想在可能的情况下仅在XAML中执行此操作，而不更改Code Behind。

I've a wpf specific problem. I'm trying to delete a Row from a Datagrid, by defining a Keybinding that passes the selected Row of the Datagrid as a Commandparameter to a Command.

This is my Keybinding:

<UserControl.Resources > <Commands:CommandReference x:Key="deleteKey" Command="{Binding DeleteSelectedCommand}"/> </UserControl.Resources> <UserControl.InputBindings> <KeyBinding Key="D" Modifiers="Control" Command="{StaticResource deleteKey}"/> </UserControl.InputBindings>

I know this basically works, because I can debug up to the DeleteSelectedCommand. However there flies an Exception because the DeleteSelectedCommand expectes a Row of the Datagrid to delete as Call Parameter.

How can I pass the SelectedRow through the Keybinding?

I want to do this only in the XAML, if possible, without changing the Code Behind.

最满意答案

与其尝试使用命令参数，不如创建一个属性来存储选定的行：

private Model row; public Model Row { get { return row; } set { if (row != value) { row = value; base.RaisePropertyChanged("Row"); } } }

其中Model是网格显示的对象的类别。 在datagrid上添加selectedItem属性以使用该属性：

<DataGrid SelectedItem="{Binding Row, UpdateSourceTrigger=PropertyChanged}"/>

然后让你的命令通过该行到该方法：

public ICommand DeleteSelectedCommand { get { return new RelayCommand<string>((s) => DeleteRow(Row)); } }

并为您的键盘绑定：

<DataGrid.InputBindings> <KeyBinding Key="Delete" Command="{Binding DeleteSelectedCommand}" /> </DataGrid.InputBindings>

希望有所帮助！

Rather than trying to use a command parameter, create a property to store the selected row in:

private Model row; public Model Row { get { return row; } set { if (row != value) { row = value; base.RaisePropertyChanged("Row"); } } }

where Model is the class of the objects your grid is displaying. Add the selectedItem property on the datagrid to use the property:

<DataGrid SelectedItem="{Binding Row, UpdateSourceTrigger=PropertyChanged}"/>

then have your command pass through the row to the method:

public ICommand DeleteSelectedCommand { get { return new RelayCommand<string>((s) => DeleteRow(Row)); } }

and for your keybindings:

<DataGrid.InputBindings> <KeyBinding Key="Delete" Command="{Binding DeleteSelectedCommand}" /> </DataGrid.InputBindings>

Hope that helps!