在 WP7 Silverlight 应用程序中以编程方式隐藏应用程序栏图标?

问题描述：

我有一个内置于 Silverlight 的 Windows Phone 7 应用程序.此应用程序使用应用程序栏.如果已购买应用程序，我想隐藏应用程序栏中的按钮之一.但是，我注意到 ApplicationIconButton 类没有公开可见性"属性.同时，我没有看到在运行时动态填充应用程序栏的方法.

I have a Windows Phone 7 application built in Silverlight. This application makes use of the application bar. If the has purchased the application, I want to hide one of the buttons in the application bar. However, I've noticed that the ApplicationIconButton class does not expose a "Visibility" property. At the same time, I did not see a way to dynamically populate the application bar at runtime.

有人可以对此提供一些见解吗?这可能吗?如果是这样，如何?

Can anybody provide some insight into this? Is this possible? If so, how?

谢谢！

答

应用程序栏按钮以基于索引的方式工作，而不是像您期望的那样基于对象.因此，每当您想对其执行特定操作(例如禁用)时，您都需要指定一个按钮索引.

Application bar buttons work in an index-based way rather than object-based like you would expect. Therefore, you need to specify a button index whenever you want to perform a specific action on it (e.g. disable).

例如:

ApplicationBarIconButton b = (ApplicationBarIconButton)ApplicationBar.Buttons[0];
b.IsEnabled = false;

话虽如此，您可以创建新的 ApplicationBarIconButton 实例并将它们传递给 ApplicationBar:

This being said, you can create new ApplicationBarIconButton instances and pass them to ApplicationBar:

for (int i = 0; i < 2; i++)
{
    ApplicationBarIconButton b = new ApplicationBarIconButton();
    b.Text = i.ToString();
    b.IconUri = new Uri("/Images/icon1.png", UriKind.Relative);
    ApplicationBar.Buttons.Add(b);
}

删除按钮时，您可以简单地使用 RemoveAt，前提是您知道要删除的按钮的索引:

When removing buttons, you can simply use RemoveAt, given that you know the index of the button to remove:

ApplicationBar.Buttons.RemoveAt(0);

在 WP7 Silverlight 应用程序中以编程方式隐藏应用程序栏图标?

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