【发布时间】：2019-08-10 15:52:11
【问题描述】：
我创建了一个类，我用它们的属性定义了一些变量。
我还有两个类“Form1”和“Form2”。
我在“Form1”中为这个变量赋值，但是当我想在赋值后使用“Form2”中的值并通过 MessageBox.Show() 显示它们时，我发现变量是空的。
class Property
{
private string a_username;
private string a_email;
public string username
{
get { return a_username; }
set { a_username = value; }
}
public string email
{
get { return a_email; }
set { a_email = value; }
}
public string password { get; set; } = "88306540";
}
赋值：（这个函数在“Form1”中）
Property pro = new Property();
private void CreateUserInform()
{
userid = File.ReadLines(filePath).Skip(idx).Take(1).First();
// MessageBox.Show(userid);
HtmlElementCollection elemcol = webBrowser2.Document.GetElementsByTagName("option");
int i = 0;
string[] mailservices = new string[elemcol.Count];
foreach (HtmlElement elem in elemcol)
{
mailservices[i] = elem.InnerText;
i += 1;
}
pro.username = userid;
Random rand = new Random();
mailservice = mailservices[rand.Next(10)];
pro.email = pro.username + mailservice;
wb2func_create_mail();
}
调用函数：（此函数在“Form2”中，它在前一个函数之后调用。）
Property pro = new Property();
public void signup_fill()
{
HtmlElementCollection elemcol = site.Document.GetElementsByTagName("input");
foreach (HtmlElement elem in elemcol)
{
if (elem.Name == "login")
elem.SetAttribute("value", pro.username);
if (elem.Name == "remail")
elem.SetAttribute("value", pro.email);
if (elem.Name == "password")
elem.SetAttribute("value", pro.password);
if (elem.Name == "password2")
elem.SetAttribute("value", pro.password);
}
MessageBox.Show(pro.username);
}
我应该提到“密码”变量显示得很好，但其他变量显示为空。
当我在我用来定义它们的“Form1”中调用它们时，它工作得很好并显示了正确的分配。
完整的Form2代码：
namespace Bypassing
{
public partial class Form2 : Form
{
string referal_link;
Property pro = new Property();
public Form2(Property form1Property)
{
InitializeComponent();
pro = form1Property;
}
public void signup_fill()
{
HtmlElementCollection elemcol = site.Document.GetElementsByTagName("input");
foreach (HtmlElement elem in elemcol)
{
if (elem.Name == "login")
elem.SetAttribute("value", pro.username);
if (elem.Name == "remail")
elem.SetAttribute("value", pro.email);
if (elem.Name == "password")
elem.SetAttribute("value", pro.password);
if (elem.Name == "password2")
elem.SetAttribute("value", pro.password);
}
MessageBox.Show(pro.username);
}
private void btn_fill_Click(object sender, EventArgs e)
{
signup_fill();
}
private void btn_logout_Click(object sender, EventArgs e)
{
HtmlElementCollection elemcol = site.Document.GetElementsByTagName("a");
foreach (HtmlElement elem in elemcol)
{
if (elem.InnerText == " Log out ")
elem.InvokeMember("click");
}
}
private void btn_next_link_Click(object sender, EventArgs e)
{
}
public bool btn_fill_enabled
{
get { return btn_fill.Enabled; }
set { btn_fill.Enabled = value; }
}
public bool btn_logout_enabled
{
get { return btn_logout.Enabled; }
set { btn_logout.Enabled = value; }
}
public bool btn_next_link_enabled
{
get { return btn_next_link.Enabled; }
set { btn_next_link.Enabled = value; }
}
private void avelon_site_Completed(object sender, WebBrowserNavigatedEventArgs e)
{
Form1 main_win = new Form1();
main_win.text_edit();
}
}
}
Form1 代码：
namespace BitcoinCloudMiningBypassApp
{
public partial class Form1 : Form
{
private string mailservice;
private string userid;
int idx = 29;
bool wb1flag = true;
bool wb2flag = true;
bool wb1ready = false;
bool wb2ready = false;
bool workflag = false;
bool start = false;
string filePath;
//StreamWriter file2 = new StreamWriter("avelon_users_email.txt", true);
//StreamWriter file = new StreamWriter("avelon_referal_links.txt", true);
Property pro = new Property();
private void OpenFileDialogForImportingUserId()
{
//var fileContent = string.Empty;
using (OpenFileDialog openFileDialog = new OpenFileDialog())
{
openFileDialog.InitialDirectory = "C:\\";
openFileDialog.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
openFileDialog.FilterIndex = 1;
openFileDialog.RestoreDirectory = true;
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
//Get the path of specified file
filePath = openFileDialog.FileName;
btn_start.Enabled = true;
////Read the contents of the file into a stream
//var fileStream = openFileDialog.OpenFile();
//using (StreamReader reader = new StreamReader(fileStream))
//{
// fileContent = reader.ReadToEnd();
//}
}
}
}
private void CreateUserInform()
{
userid = File.ReadLines(filePath).Skip(idx).Take(1).First();
// MessageBox.Show(userid);
HtmlElementCollection elemcol = webBrowser2.Document.GetElementsByTagName("option");
int i = 0;
string[] mailservices = new string[elemcol.Count];
foreach (HtmlElement elem in elemcol)
{
mailservices[i] = elem.InnerText;
i += 1;
}
pro.username = userid;
Random rand = new Random();
mailservice = mailservices[rand.Next(10)];
pro.email = pro.username + mailservice;
//MessageBox.Show(avelon_email);
wb2func_create_mail();
}
public Form1()
{
InitializeComponent();
webBrowser2.Navigate("https://temp-mail.org/en/option/change/");
}
private void btn_start_Click(object sender, EventArgs e)
{
Form2 avelon = new Form2(pro);
avelon.Show();
//VPN vpn = new VPN();
// MessageBox.Show(vpn.ConnectVPN(vpn.SetServer(0)).ToString());
CreateAvelonUserInform();
start = true;
btn_load.Enabled = false;
btn_start.Enabled = false;
avelon.btn_logout_enabled = true;
btn_refresh.Enabled = false;
}
private void Form1_Load(object sender, EventArgs e)
{
btn_load.Enabled = false;
btn_start.Enabled = false;
btn_next.Enabled = false;
//Process.Start("cmd.exe", "taskkill / F / im notepad.exe");
}
private void webBrowser2_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
if (wb2flag)
{
wb2flag = false;
wb2ready = true;
if (!start)
btn_load.Enabled = wb2ready;
}
else
{
text_edit();
}
}
private void wb2func_create_mail()
{
HtmlElementCollection elemcol = webBrowser2.Document.GetElementsByTagName("option");
foreach (HtmlElement elem in elemcol)
{
if (elem.InnerText == mailservice)
elem.SetAttribute("selected", "selected");
}
HtmlElementCollection elemcol2 = webBrowser2.Document.GetElementsByTagName("input");
foreach (HtmlElement elem in elemcol2)
if (elem.GetAttribute("name") == "mail")
elem.SetAttribute("value", pro.username);
//wb2flag = true;
//workflag = true;
webBrowser2.Document.GetElementById("postbut").InvokeMember("click");
}
private void btn_load_Click(object sender, EventArgs e)
{
//OpenFileDialogForImportingUserId();
VPN vpn = new VPN();
MessageBox.Show(vpn.ConnectVPN(vpn.SetServer(0)).ToString());
//Process.Start("C:\\Users\\Hossein\\Desktop\\output.bat");
//MessageBox.Show(Environment.GetEnvironmentVariable("a", EnvironmentVariableTarget.Process));
//MessageBox.Show(Environment.GetEnvironmentVariable("a", EnvironmentVariableTarget.User));
//MessageBox.Show(Environment.GetEnvironmentVariable("a", EnvironmentVariableTarget.Machine));
}
public void text_edit()
{
txt_username.TextChanged += new EventHandler(text_change);
txt_username.Text = pro.username;
txt_email.Text = pro.email;
}
private void btn_next_Click(object sender, EventArgs e)
{
}
private void btn_refresh_Click(object sender, EventArgs e)
{
webBrowser2.Navigate("https://temp-mail.org/en/option/change/");
}
private void text_change(object s , EventArgs e)
{
Form2 avelon = new Form2(pro);
avelon.btn_fill_enabled = true;
}
}
}
【问题讨论】：
-
Property pro = new Property();在 Form2 中创建Property类的全新实例（即新对象，如新副本）。它与您在 Form1 中创建的副本没有关系。如果您想重新使用已有的副本，那么您需要能够在 Form2 中引用它。如果没有更多的上下文，很难准确地说出最有效的方法是什么。 （密码字段起作用的原因是因为您将其硬编码到 Property 类中，因此它会插入到您声明的类的每个实例中） -
@ADyson - 短语“新副本”听起来像是在复制当前实例。这是一个全新的无关实例。
-
@Enigmativity 我在第一次创建评论后稍微编辑了措辞，我希望它更清楚。但无论如何，我的意思是原始类声明的新“副本”（即实例），而不是其他现有实例。只是试图找到一种用外行术语来描述正在发生的事情的词语，避免使用过多的行话。这样，那些对 OO 编程来说是新的（我怀疑 OP 可能是）可能能够更容易地关联这个概念。
-
@ADyson 你能解释一下如何使用 Form2 构造函数传递属性参数吗？
-
@HosseinShahbodaghkhan 首先，您在代码中的哪个位置创建 Form2()？