Question

我有两种不同的形式，一种形式专用于密码输入，如果密码正确，打开一个对话框，用于从PC加载文件，如果错误，则会出现一个消息框，指出密码错误。问题是如果程序启动，我单击按钮并输入正确的密码并成功加载文件。但如果再次按下按钮输入密码，我通过顶部的X手动关闭弹出窗口，我可以访问对话框窗口。我无法得到如何制止这一点。

我的代码如下

表单1：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.Windows;
using System.Threading;
using System.Text.RegularExpressions;

namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

    private void button1_Click(object sender, EventArgs e)
    {


        formpopup popup = new formpopup();
        popup.ShowDialog();
        if (formpopup.j == 1)
        {
            OpenFileDialog openfiledialog1 = new OpenFileDialog();
            if (openfiledialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {

            }
        }
    }
}
}

另一种形式的密码是：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication2
{
public partial class formpopup : Form
{
    public formpopup()
    {
        InitializeComponent();
    }
    public static int j = 0;
    private void button1_Click(object sender, EventArgs e)
    {
        string a = textBox1.Text;
        if (a == "1234")
        {
            j = 1;
            textBox1.Text = string.Empty;
            this.Close();

        }
        else
        {
            j = 0;
            textBox1.Text = string.Empty;
            this.Close();


        }
    }

   private void textBox1_TextChanged(object sender, EventArgs e)
    {

    }
}
}

是的，我也试过使用form.Dispose（）命令，但没有任何反应。

Answer 1

您的解决方案需要重新设计：地球上的"j"意味着什么？

// Make the class name readable, use upper case (FormPopup instead of formpopup):
public partial class FormPopup : Form {
  public FormPopup() {
    InitializeComponent();
  }

  //TODO: rename the button as well as the textbox 
  private void button1_Click(object sender, EventArgs e) {
    if (textBox1.Text == "1234") 
      DialogResult = System.Windows.Forms.DialogResult.OK;
    else
      DialogResult = System.Windows.Forms.DialogResult.Cancel;

    // In case form was open as non-dialog
    Close();
  } 
}

....

public partial class Form1 : Form {
  ...
  private void button1_Click(object sender, EventArgs e) {
    // Wrap IDisposable into using
    using (FormPopup dialog = new FormPopup()) {
      if (dialog.ShowDialog() != System.Windows.Forms.DialogResult.OK) 
        return; // wrong password
    }

    // Wrap IDisposable into using
    using (OpenFileDialog fileDialog = new OpenFileDialog()) {
      if (fileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK) {
        //TODO: put relevant code here
      }
    }
  }
}

Answer 2

问题是您的 j 是静态的。使其成为非静态的，因此它将引用表单的实例

public int j = 0;

然后你应该以类似的方式参考你的表格

    if (popup.j == 1)
    {
        OpenFileDialog openfiledialog1 = new OpenFileDialog();
        if (openfiledialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
        {

        }
    }

在c＃

2 个答案: