Question

我有一个消息框的代码：

private void ControlComp_FormClosing(object sender, FormClosingEventArgs e)
        {
            e.Cancel = true;
            if (changed == true)
            {
                string message = "Do you want to exit without saving?";
                string caption = "exit";
                MessageBoxButtons buttons = MessageBoxButtons.YesNo;
                MessageBoxIcon icon = MessageBoxIcon.Question;
                DialogResult result;

                result = MessageBox.Show(message, caption, buttons, icon);

                if (result == DialogResult.Yes)
                {
                    this.Close();
                }
            }

        }

我需要做的是，我检查更改的值是否为真，只有它是真的它会显示一个弹出消息，带有是或否按钮，如果单击是，我退出整个表单，否则我留在表单中

如果更改的值为false，则再次关闭它。但是这段代码不起作用。

Answer 1

要取消关闭表单，请在else语句中使用e.Cancel = true;

见下面的示例代码： -

 if (MessageBox.Show("This will close down the whole application. Confirm?", "Close Application", MessageBoxButtons.YesNo) == DialogResult.Yes)
    {
        MessageBox.Show("The application has been closed successfully.", "Application Closed!", MessageBoxButtons.OK);
    }
    else
    {
        e.Cancel = true;
    }

在消息框中添加是或否按钮c＃

1 个答案: