当this.Close()执行时，所有表单都关闭吗? [英] When this.Close() executed all forms close?

问题描述

过去几天来，我只是从某种Java中学习C#，因此，作为一种简单的程序，我正在尝试制作一个包含一些密码的程序.

I've only been learning C# the past few days after coming from some Java, so just as a sort of simple program I'm trying to make a program to hold some passwords.

我将注释掉有此问题的代码.

I'll comment out the code with the problem.

我的主要表格代码是:

{
public partial class fLogin : Form
{
    public fLogin()
    {
        InitializeComponent();
    }

    private void btnLogin_Click(object sender, EventArgs e)
    {
        bool checkUser = md5(tbUsername.Text) == Properties.Settings.Default.Username;
        bool checkPass = md5(tbPassword.Text) == Properties.Settings.Default.Password;
        if (checkUser && checkPass)
        {
            Passwords pFrame = new Passwords();
            pFrame.Activate();
            this.Hide();
        }
    }

    private String md5(String tBox)
    {
        MD5 md5 = new MD5CryptoServiceProvider();
        md5.ComputeHash(ASCIIEncoding.ASCII.GetBytes(tBox));
        byte[] result = md5.Hash;
        StringBuilder strBuilder = new StringBuilder();
        for (int i = 0; i < result.Length; i++)
        {
            strBuilder.Append(result[i].ToString("x2"));
        }
        String finalValue = strBuilder.ToString();
        return finalValue;
    }

    private void fLogin_Load(object sender, EventArgs e)
    {
        if (Properties.Settings.Default.Username == "null" || Properties.Settings.Default.Password == "null")
        {
            //This is where I create my second Form!.
            //CreatePassword newPass = new CreatePassword();
            //this.Hide();
            //newPass.Show();
        }
        else if (md5(tbUsername.Text) == Properties.Settings.Default.Username && md5(tbPassword.Text) == Properties.Settings.Default.Password)
        {
            Passwords pFrame = new Passwords();
            this.Hide();
            pFrame.Show();
        }
    }

    private void btnClose_Click(object sender, EventArgs e)
    {
        Application.Exit();
    }

    private void btnCPass_Click(object sender, EventArgs e)
    {
        ChangePass CPFrame = new ChangePass();
        CPFrame.ShowDialog(this);
    }
  }
}

我的第二个表单代码是

using System;
using System.IO;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Security.Cryptography;

namespace PassMan
{
public partial class CreatePassword : Form
{
    public CreatePassword()
    {
        InitializeComponent();
    }

    private void btnSave_Click(object sender, EventArgs e)
    {
        String username = md5(tbUsername.Text);
        String password = md5(tbPassword.Text);
        String[] pwds = { username, password };
        Properties.Settings.Default.Username = username;
        Properties.Settings.Default.Password = password;
        Properties.Settings.Default.Save();
        //This is where I Exit. It Closes this form & the other form!
        //this.Close();

    }

    private String md5(String tBox)
    {
        MD5 md5 = new MD5CryptoServiceProvider();
        md5.ComputeHash(ASCIIEncoding.ASCII.GetBytes(tBox));
        byte[] result = md5.Hash;
        StringBuilder strBuilder = new StringBuilder();
        for (int i = 0; i < result.Length; i++)
        {
            strBuilder.Append(result[i].ToString("x2"));
        }
        String finalValue = strBuilder.ToString();
        return finalValue;
    }

    private void btnCancel_Click(object sender, EventArgs e)
    {
        Application.Exit();
    }

    protected override void OnFormClosing(FormClosingEventArgs e)
    {
        Application.Exit();
    }


}
}

推荐答案

该行为是因为您在调用newForm.ShowDialog(this);

That behaviour is because you have set this as the parent of newForm when you called newForm.ShowDialog(this);

因此，当您调用this.Close()时，它将关闭this表单及其所有子表单.

so when you call this.Close() it will close the this form and all its child forms.

更新

从更新后的问题(添加代码)中，我注意到您正在关闭CreatePassword表单的表单关闭事件中的整个应用程序.

From your updated question (code addition) i've noticed that you are closing the entire application in your form closing event of your CreatePassword form.

 protected override void OnFormClosing(FormClosingEventArgs e)
    {
        Application.Exit(); //comment this out.
    }

注释Application.Exit();

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