打开文件对话框MVVM [英] Open File Dialog MVVM

问题描述

好吧，我真的很想知道MVVM专业开发人员如何在WPF中处理打开文件对话框.

Ok I really would like to know how expert MVVM developers handle an openfile dialog in WPF.

我真的不想在我的ViewModel中执行此操作(通过DelegateCommand引用浏览")

I don't really want to do this in my ViewModel(where 'Browse' is referenced via a DelegateCommand)

void Browse(object param)
{
    //Add code here
    OpenFileDialog d = new OpenFileDialog();

    if (d.ShowDialog() == true)
    {
        //Do stuff
    }
}

因为我认为这与MVVM方法背道而驰.

Because I believe that goes against MVVM methodology.

我该怎么办?

推荐答案

此处最好的做法是使用服务.

The best thing to do here is use a service.

服务只是您从中央服务存储库(通常是IOC容器)访问的类.然后，该服务将实现所需的功能，例如OpenFileDialog.

A service is just a class that you access from a central repository of services, often an IOC container. The service then implements what you need like the OpenFileDialog.

因此，假设您在Unity容器中有一个IFileDialogService，则可以...

So, assuming you have an IFileDialogService in a Unity container, you could do...

void Browse(object param)
{
    var fileDialogService = container.Resolve<IFileDialogService>();

    string path = fileDialogService.OpenFileDialog();

    if (!string.IsNullOrEmpty(path))
    {
        //Do stuff
    }
}

这篇关于打开文件对话框MVVM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！