e.cancel = true如何在formclosing事件中起作用？ [英] How does e.cancel=true works in formclosing event?

问题描述

当用户故意关闭获胜表格时，我希望在数据库中进行一些更改。



我尝试了什么：

I want some changes to be made in the database when the user deliberately closes the win form.

What I have tried:

private void Form1_FormClosing(object sender, FormClosingEventArgs e)
       {
           if(e.CloseReason==CloseReason.UserClosing)
           {
               e.Cancel = true; /* if it is true then it can be seen that the
                                 statements inside the formclosing methods runs
                                  twice(which causes the problem) before going to
                                  formclosed. when i set it to false then the problem
                                  gets resolved and y is that so */
               this.Hide();
               UpdateToken();
           }
       }

推荐答案

您需要知道的所有内容都写在这里：

表格.FormClosing事件（System.Windows.Forms）| Microsoft Docs [ ^ ]

CancelEventArgs.Cancel Property（System.ComponentModel）| Microsoft Docs [ ^ ]

All what you need to know has been written here:
Form.FormClosing Event (System.Windows.Forms) | Microsoft Docs[^]
CancelEventArgs.Cancel Property (System.ComponentModel) | Microsoft Docs[^]

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