为什么我的 WPF 文本框不显示任何字符？
我有一个应用程序，其中包含一个用 WPF 编写的 DLL。该应用程序以登录窗口启动（该应用程序是 Windows 窗体，DLL 位于 WPF 中）。当我键入用户名或密码时，我看不到文本框中的字符，但它们按预期保存在文本框或密码框的 Text1 属性中。
什么可以解释这种行为，以及如何修复它以便在键入字符时看到它们？
I have an application which includes a DLL written in WPF. This application starts with the login window (the application is a Windows Form and the DLL is in WPF). When I type the user name or password I can't see the characters in the textbox, but they are saved in the Text1 property of both the textBox or the passwordBox as expected.
What could explain this behavior, and how can I fix it so that I see the characters as they're typed?
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也许前景色等于背景色？如果您尝试在输入后选择文本，您会得到一些东西吗？
Maybe could it be the foreground color which is equal to the background color ? If you try selecting text after typing, do you get something ?
前景和背景不一样，我查了一下……
我收到了我输入的文本，但我看不到它，这是我见过的最奇怪的事情......我已经打开了另一个项目
the foreground and the background are not the same, i have checked it...
i get the text i type in but i can't see it, this is the most weird thing i have ever seen....i have opened another project
我在您的场景中看到了这一点：当 WPF 窗口由 Windows 窗体应用程序托管时。
您需要在单独的线程中运行 WPF 窗口以避免此问题。
I have seen this in your scenario: when the WPF window is hosted from a Windows Form application.
You need to run the WPF window in a separate thread to avoid this problem.