c#按钮上的密码

Question

I have a windows form i'm working on. I have a button on a windows form if a user clicks the button another window appears with a textbox and a button asking you to put a password in. If the user types the passord correctly it will open a new form called AdminPage, however if the user types in the incorrect password a messagebox appears asking to try again. The problem is that i cant seem to get the AdminPage to open even if I type in the correct password. If someone could guide me in my errors that would be great thanks

 private void EnterBtn_Click(object sender, EventArgs e)
    {
        if (PsswdTxt.Text == ("BuildStore"))
        {
            AdminPage m = new AdminPage();
            m.Show();
            this.Close();
        }
          else

                MessageBox.Show("Please Try again");

        }
    }
}

Answer 1

Could it be that you're typing Buildstore or buildStore? The comparison is case sensitive - if you want to match the word irrespective of case you can use String.Compare or you could convert both values to upper/lower:

if (string.Compare(PsswdTxt.Text,"BuildStore" ,true) == 0) // true signifies to ignore case
{
   AdminPage m = new AdminPage();
   m.Show();
   this.Visible = false;
}

or...

   if (PsswdTxt.Text.ToUpper() == "BuildStore".ToUpper())
    {
       AdminPage m = new AdminPage();
       m.Show();
       this.Visible = false;
    }

Answer 2

I would create a Login" form for that. This; to control certain funtions for each user account. But "we" don't know what you are programming in there.

You can use a Login Form either when App Starts or when that button is clicked. (Even by many other ways...)

Although if your password is always the same; you can try this: 1) Create a "Login" form; add 2 textBoxes and a button. 2) Code it like this:

public partial class Form1 : Form
{
    // Variable to create a new Form2
    Form2 f2 = new Form2();

    public Form1()
    {
        InitializeComponent();
    }

    // On Login Form Load...
    private void Form1_Load(object sender, EventArgs e)
    {
        btn_Login.Enabled = false;
    }

    // Login Button CLick
    private void btn_Login_Click(object sender, EventArgs e)
    {
        // replace "myUserName" with your User Name and "myPassword" with your password

            if (txtb_UserName.Text == "myUserName" && txtb_Password.Text == "myPassword")
            {
                // Shows the protected form
                f2.Show();
            }

                // If the Username or Password is not correct; A messageBox will be shows (or 2 if both are incorrect)
                // This can be perfected. But im just showing the basic examples.
            else if (txtb_UserName.Text != "myUserName")
            {
                // Sends an error message
                MessageBox.Show("Incorrect UserName");
            }

            else if (txtb_Password.Text != "myPassword")
            {
                // Sends an error message
                MessageBox.Show("Incorrect Password");
            }
        }

    // Add this code to enable or disable the login button. 
    // this will happen in both textBoxes (on TextChange Event).
    private void check_Text_Content()
    {
        if(txtb_UserName.Text != string.Empty && txtb_Password.Text != string.Empty)
        {
            btn_Login.Enabled = true;
        }

        else if (txtb_UserName.Text == string.Empty)
        {
            btn_Login.Enabled = false;
        }

        else if (txtb_Password.Text == string.Empty)
        {
            btn_Login.Enabled = false;
        }
    }

    // Now as you can see both textBoxes will check if their text is empty or not.
    // If it's empty; The login Buttton will be disabled. Else; will be Enabled.

    private void txtb_UserName_TextChanged(object sender, EventArgs e)
    {
        check_Text_Content();
    }

    private void txtb_Password_TextChanged(object sender, EventArgs e)
    {
        check_Text_Content();
    }
}

}

If you want to customize your password once in a while i would use MS Access or SQL DataBase. (And a form to customize them). Not trying to discouraging you or something; but if you don't know how to create and manage SQL / MS Access Databases; i recommend you to search Google. There are tons of tutorials around the web. I'm not showing you how to do it with SQL or Access DB; because it's would be a huge step by step tutorial. Hope it works for you.

Answer 3

try this code..

 private void EnterBtn_Click(object sender, EventArgs e)
    {
        if (string.Equals(PsswdTxt.Text,"BuildStore"))
        {
            AdminPage m = new AdminPage();
            m.Show();
            this.Visible = false;
        }
        else
        {
          MessageBox.Show("Please Try again");
        }        
    }

Answer 4

You should try ShowDialog instead of Show. It might be that it is shown behind the other form.