按钮启用和禁用文本更改事件
问题描述：
我想知道如何设置按钮以禁用文本框中是否没有文本，但是何时重新启用它呢?我可以将其放入文本更改事件中吗?
I am wondering how I can set a button to disable if there is no text inside a text box, but when there is re enable it? Would I put it into a text changed event?
答
类似的东西(WinForms):
Something like that (WinForms):
private void myTextBox_TextChanged(object sender, EventArgs e) {
myButton.Enabled = !String.IsNullOrEmpty(myTextBox.Text);
}
编辑:对于初始表单加载，您可以使用 Load 事件:
EDIT: For initial form load you can use Load event:
private void myForm_Load(object sender, EventArgs e) {
myButton.Enabled = !String.IsNullOrEmpty(myTextBox.Text);
}