文本框为空时禁用按钮 [英] Disable a button when a textbox is empty

问题描述

通过 禁用按钮的正确方法是什么？当文本字段在用户控件中并且按钮在主窗口中时，使用WPF的ICommand接口？窗口命令和文本框绑定应该绑定在ViewModel中。

What is the proper way to disable a button via  the ICommand interface using WPF when the textfield is in a User Control and the button is in the main window? The window command and the textbox binding should be bound in the ViewModel.

你能给我一个示例代码吗？

Can you give me an example code for that?

推荐答案

您好，

Hi,

通过 禁用按钮的正确方法是什么？当文本字段在用户控件中并且按钮在主窗口中时，使用WPF的ICommand接口？窗口命令和文本框绑定应该绑定在ViewModel中。

What is the proper way to disable a button via  the ICommand interface using WPF when the textfield is in a User Control and the button is in the main window? The window command and the textbox binding should be bound in the ViewModel.

你能给我一个示例代码吗？

Can you give me an example code for that?

Hi FeyPeshev，

Hi FeyPeshev,

根据您的描述，主窗口和UserControl称为Usercontrol1。 Usercontrol1中的TextBox，主窗口中的Button和UserControl1，现在你想在主窗口的UserControl中TextBox.text为空时禁用Button吗？

According to your description, there are main Window and UserControl called Usercontrol1. A TextBox in Usercontrol1, a Button and UserControl1 in main Window, now you want to disable Button when TextBox.text is empty in UserControl from main Window?

我不确定你想要什么你能在这里描述更详细的信息。

I am not sure what you want to do, can you describe more detailed info here.

最好的问候，

Cherry

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