C# 单击登录按钮时从一种形式重定向到另一种形式
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Redirecting from one form to other form on clicking login button
提问by DoIt
I am trying to add a security module to my database application and what actually I am trying to do is whenever I click on Logon button, it exits the login form and opens the main form depending on the role of user. I have the following code:
我正在尝试向我的数据库应用程序添加一个安全模块，实际上我想要做的是每当我单击登录按钮时，它都会退出登录表单并根据用户的角色打开主表单。我有以下代码：
LOGIN FORM:
登录表格：
public void Login()
{
frmCommissionReport _commReport = new frmCommissionReport();
if (_commission.Login(cbxLoginName, txbPassword))
{
MessageBox.Show("Successfull");
// close this form - do not exit the application
frmCommissionReport frm = new frmCommissionReport();
this.Close();
frm.ShowDialog();
}
else
{
MessageBox.Show("Username or Password not recognised");
}
}
private void btnLogin_Click(object sender, EventArgs e)
{
Login();
}
MAIN FORM (frmCommissionReport)
主表格（frmCommissionReport）
public frmCommissionReport()
{
InitializeComponent();
_login.ShowDialog();
}
But for some reasons whenever I fill in the login details and click Login Button, it again opens the same Login Form and keeps on duplicating the login form whenever I click Login Button rather than redirecting me to Main Form
但是由于某些原因，每当我填写登录详细信息并单击登录按钮时，它都会再次打开相同的登录表单，并在我单击登录按钮时不断复制登录表单，而不是将我重定向到主表单
采纳答案by DoIt
I figured the apt solution for my problem in a bit different way than I started with
我以与开始时有点不同的方式为我的问题找到了合适的解决方案
LOGIN FORM
登录表格
public partial class frmLogin : Form
{
#region "Properties"
private bool _Authenticated = false;
public bool Authenticated
{
get { return _Authenticated; }
set { _Authenticated = value; }
}
#endregion
public void Login()
{
if (GetLoginAuthentication(cbxLoginName, txbPassword))
{
this.Hide();
//MessageBox.Show("Successfull");
Authenticated = true;
//frmCommissionReport frm = new frmCommissionReport();
//frm.ShowDialog();
}
else
{
Authenticated = false;
MessageBox.Show("Username or Password not recognised");
}
}
MAIN FORM
主要形式
public frmCommissionReport()
{
frmLogin login = new frmLogin();
login.ShowDialog();
if (login.Authenticated)
{// block of code
}
This worked fine without any issue
这工作正常，没有任何问题
回答by Thabo
When you login successfully, you are instantiating another frmCommissionReport(), which is in turn calling _login.ShowDialog() (I'm assuming on a new instance of Login), and this.Close() is closing the existing Login form, not the new one associated with the new frmCommissionReport() instance.
当您成功登录时，您正在实例化另一个 frmCommissionReport()，它依次调用 _login.ShowDialog()（我假设在登录的新实例上），而 this.Close() 正在关闭现有的登录表单，而不是与新的 frmCommissionReport() 实例关联的新实例。
回答by Luis
try to change this.close into this.hide
尝试将 this.close 更改为 this.hide
if (_commission.Login(cbxLoginName, txbPassword))
{
MessageBox.Show("Successfull");
// close this form - do not exit the application
frmCommissionReport frm = new frmCommissionReport();
this.hide();
frm.ShowDialog();
}
