C＃验证才离开accept_button事件 [英] C# Validate before leaving accept_button event

问题描述

原谅我，如果这是一个愚蠢的问题，但我是一个beginer这里。

Excuse me if this is a silly question but i'm a beginer here.

我有一个简单的自定义的两个按钮对话框：接受和取消。接受按钮的形式的acceptButton。

I have a simply custom dialog with two buttons: Accept and Cancel. The Accept button is the acceptButton of the form.

我想要做一些验证的Accept_Click事件，并决定，如果我能关闭对话框或没有，但每次它离开该方法时，对话框会自动关闭本身并返回OK。

I want to do some validations on the Accept_Click event and decide if i can close the dialog or not, but everytime it leaves this method, the dialog automatically closes itself and returns Ok.

我能做些什么，从关闭而结束对话？或者我必须做的事情在一些其他的方式？

What can I do to stop the dialog from closing itself? or i have to do things in some other way?

感谢

推荐答案

我想有一个表单级变量（称之为vetoClosing _ ）在接受按钮的Click事件，我会根据运行验证和设置变量：

I would have a form level variable (call it _vetoClosing) In the accept button's Click event, I would run validation and set the variable based on that:

    private void acceptButton_Click(object sender, EventArgs e)
    {
        // Am I valid
        _vetoClosing = !isValid();
    }

然后在的FormClosing事件，我会取消紧密，如果_vetoClosing是真的

Then in the FormClosing event, I would cancel close if _vetoClosing is true

    private void Form_FormClosing(object sender, FormClosingEventArgs e)
    {
        // Am I allowed to close
        if (_vetoClosing)
        {
            _vetoClosing = false;
            e.Cancel = true;
        }
    }

因为你失去了进入到preSS功能

打开接受按钮关闭是最理想的。

Turning Accept button off is suboptimal because you loose the Enter to Press functionality.

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