异步与WPF性能 [英] Async with WPF properties

问题描述

我有一个绑定属性是这样的：

I have a bound property like this:

public string MyPath
{
    get { return _mypath; }
    set
    {
        _mypath = value;
        NotifyPropertyChanged(() => MyPath);
        LoadSomeStuffFromMyPath(mypath)
    }
}

我想化妆LoadSomeStuffFromMyPath异步，但我不能从属性等待。有一个简单的方法来做到这一点？

I'd like the make LoadSomeStuffFromMyPath async but I cannot await from a property. Is there a simple way to do this?

编辑：不止一个人曾表示，不使用属性，所以我想打电话给了这一点。我使用WPF和这个属性绑定到用户界面。我必须使用一个属性。

More than one person has said not to use a property so I want to call this out. I am using WPF and this property is bound to the UI. I have to use a property.

推荐答案

由于要强制执行该操作不继续下去，直到这个完成后，我会建议作出处理负载的方法和显示你的进步。

Since you want to force the operation to not continue until this is complete, I would suggest making a method to handle loading and displaying your progress.

您可以使用的一个单独的属性的禁用UI，而这种负载，从而可以有效地堵你的用户，直到操作完成：

You could use a separate property to disable the UI while this loads, which could effectively "block" your user until the operation completes:

public string MyPath
{
    get { return _mypath; }
    set
    {
        _myPath = value;
        NotifyPropertyChanged(() => MyPath);
        UpdateMyPathAsync();
    }
}

public async Task UpdateMyPathAsync()
{
    this.EnableUI = false; // Stop user from setting path again....
    await LoadSomeStuffFromMyPathAsync(MyPath); 
    this.EnableUI = true;
}

这允许你还是绑定，如正常，WPF，但你的UI反映操作运行（异步），并显示进度等。

This allows you to still bind, as normal, with WPF, but have your UI reflect that the operation is running (asynchronously) and display progress, etc.

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