public static AdminClass create_Instance()
{
if (instance == null) //this "if" will be true only when first time intance is created
{
instance = new AdminClass();
}
return(instance);
//This will return the saved instance everytime whenever create_Instance() is called bcz instance is static !
}
private void button1_Click(object sender, EventArgs e)
{
Console.Beep();
string str = " ";
string username = "******";
string password = "******";
if (First_Page.opt1 == 0)
{
string doc_path = First_Page.doc_path;
try
{
StreamReader sr = new StreamReader(doc_path + txtusername.Text + ".txt");
for (int i = 0; i < 2; ++i)
{
str = sr.ReadLine();
}
username = sr.ReadLine();
password = sr.ReadLine();
sr.Close();
}
catch
{
MessageBox.Show("User Not Found", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
checkCredentials(username, password);
}
else if (First_Page.opt1 == 1)
{
string patient_path = First_Page.pat_path;
try
{
StreamReader sr = new StreamReader(patient_path + txtusername.Text + ".txt");
for (int i = 0; i < 2; ++i)
{
str = sr.ReadLine();
}
username = sr.ReadLine();
password = sr.ReadLine();
sr.Close();
}
catch
{
MessageBox.Show("User Not Found", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
checkCredentials(username, password);
}
else
{
AdminClass admin = AdminClass.create_Instance(); //Single instance of admin class
if (txtusername.Text == admin._username)
{
if (txtpassword.Text == admin._password)
{
this.Hide();
Admin ad = new Admin(true);
ad.ShowDialog();
this.Close();
}
else
{
MessageBox.Show("Password Unmatched", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
else
{
MessageBox.Show("Username Unmatched", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}
