使用EventToCommand和Devexpress将数据传递给ViewModel

我正在使用devexpress winform控件，目前我已在视图构造函数中定义了RowDoubleClick事件，如下所示：

mvvmContext1.WithEvent<MyViewModel, RowClickEventArgs>(gridView1, "RowClick")
            .EventToCommand(x => x.Show(),
            v => (v.Clicks == 2) && (v.Button == MouseButtons.Left));

当我双击该行时，会出现messagebox并打印“row Clicked”，但我也想在这个show方法中获取行数据（学生类型）

我如何才能做到这一点？

请看演示。我建议您将绑定分为两部分—将聚焦行绑定到ViewModel的属性。 然后，将双击操作绑定到

Show

命令：

var fluentAPI = mvvmContext.OfType<MyViewModel>();
// Synchronize the ViewModel.SelectedEntity and the GridView.FocusedRowRandle in two-way manner
fluentAPI.WithEvent<ColumnView, FocusedRowObjectChangedEventArgs>(gridView, "FocusedRowObjectChanged")
    .SetBinding(x => x.SelectedEntity,
        args => args.Row as Student,
            (gView, entity) => gView.FocusedRowHandle = gView.FindRow(entity));
// Proceed the Show command when row double-clicked
fluentAPI.WithEvent<RowClickEventArgs>(gridView, "RowClick").EventToCommand(
        x => x.Show(default(Student)),
            x => x.SelectedEntity,
                args => (args.Clicks == 2) && (args.Button == MouseButtons.Left));

---

我已经像您一样完成了所有操作，但是visual studio对SelectedEntity（在您的代码中-{SetBinding（x=>x.SelectedEntity}）有问题。错误是：“ColumnView”不包含“SelectedEntity”的定义，并且找不到接受“ColumnView”类型的第一个参数的扩展方法“SelectedEntity”（是否缺少using指令或程序集引用？）

var fluentAPI = mvvmContext.OfType<MyViewModel>();
// Synchronize the ViewModel.SelectedEntity and the GridView.FocusedRowRandle in two-way manner
fluentAPI.WithEvent<ColumnView, FocusedRowObjectChangedEventArgs>(gridView, "FocusedRowObjectChanged")
    .SetBinding(x => x.SelectedEntity,
        args => args.Row as Student,
            (gView, entity) => gView.FocusedRowHandle = gView.FindRow(entity));
// Proceed the Show command when row double-clicked
fluentAPI.WithEvent<RowClickEventArgs>(gridView, "RowClick").EventToCommand(
        x => x.Show(default(Student)),
            x => x.SelectedEntity,
                args => (args.Clicks == 2) && (args.Button == MouseButtons.Left));

public class MyViewModel{
    public virtual Student SelectedEntity { 
        get;
        set;
    }
    protected void OnSelectedEntityChanged(){
        this.RaiseCanExacuteChanged(x => x.Show(default(Student)));
    }
    public void Show(Student student){
        //...
    }
}