C# - 水印密码？

Question

我正在为我的程序创建一个登录表单,其中我有两个文本框电子邮件和密码的水印.

当文本框为空时,其水印文本将显示在其中,如"在此处输入电子邮件"和"在此输入密码".

到目前为止我的代码是:

    private void emailLogin_Leave(object sender, EventArgs e){
        if (emailLogin.Text.Length == 0){
            emailLogin.Text = "Email";
            emailLogin.ForeColor = Color.Silver;
        }
    }

    private void emailLogin_Enter(object sender, EventArgs e){
        if (emailLogin.Text == "Email"){
            emailLogin.Text = "";
            emailLogin.ForeColor = Color.Black;
        }
    }

    private void passwordLogin_Leave(object sender, EventArgs e){
        if (passwordLogin.Text.Length == 0){
            passwordLogin.Text = "Password";
            passwordLogin.ForeColor = Color.Silver;
        }
    }

    private void passwordLogin_Enter(object sender, EventArgs e){
        if (passwordLogin.Text == "Password"){
            passwordLogin.Text = "";
            passwordLogin.ForeColor = Color.Black;
        }
    }

但现在我的问题是我想使用密码字符作为密码.但我仍然希望水印文本是常规文本.当我检查使用密码char时,它会将我的水印变为" ** "而不是"密码".我该如何解决这个问题？

顺便说一下,我不想使用"UseSystemPasswordChar"(那些点).我想使用"PasswordChar"并使用星号(*)作为密码字符.

Answer 1

只需设置它并取消设置就像对ForeColor一样:

    private void passwordLogin_Leave(object sender, EventArgs e){
        if (passwordLogin.Text.Length == 0){
            passwordLogin.Text = "Password";
            passwordLogin.ForeColor = Color.Silver;
            passwordLogin.PasswordChar = '\0';
        }
    }

    private void passwordLogin_Enter(object sender, EventArgs e){
        if (passwordLogin.Text == "Password"){
            passwordLogin.Text = "";
            passwordLogin.ForeColor = Color.Black;
            passwordLogin.PasswordChar = '*';
        }
    }