C# 文本框上的火灾事件失去焦点
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Fire event on textbox lose focus
提问by
I'm trying to call a method as soon as a TextBox on my screen gets 'un-focused' if that makes any sense? The user types in a username and as soon as that textbox loses focus I want to fire an event that checks if that username is indeed available.
我正在尝试在屏幕上的 TextBox 变得“未聚焦”时立即调用一个方法，如果这有意义的话？用户输入用户名，一旦该文本框失去焦点，我想触发一个事件，检查该用户名是否确实可用。
Thanks!
谢谢！
采纳答案by ygssoni
There is a Control.Leavein C#, which I think is perfect for your purpose.
Control.Leave在 C# 中有一个，我认为它非常适合您的目的。
you can go to events of the textbox in visual studio, and find the Leaveevent.
你可以去visual studio中文本框的Leave事件，并找到该事件。
The code generated will be like :
生成的代码将类似于：
private void txtbox_Leave(object sender, EventArgs e)
{
//Check for available operation Code
}
回答by Milan Aggarwal
Please explore the LostFocusevent in a textbox. Hope it helps
请LostFocus在textbox. 希望能帮助到你
回答by christian luketa
select your object and to choose the panel of the properties and click on event.To unroll until LEAVE and double-click above.that will give you:
选择您的对象并选择属性面板并单击事件。展开直到离开并在上面双击。这将为您提供：
private void object_Leave( object sender, EventArgs e)
{
////put your code here
}
