Null Password Char in Winform [duplicate]

Answer 1

using this code to set null Password character

textBox1.PasswordChar = (char)0;

or this

textBox1.PasswordChar = '\0';

Answer 2

Did you try reading the manual for TextBox.PasswordChar?

Set the value of this property to 0 (character value) if you do not want the control to mask characters as they are typed.

Answer 3

To reset PassswordChar, do this txtPassword.PasswordChar = '\0';

For your convenience:

private void checkBox1_CheckedChanged(object sender, EventArgs e){
   txtPassword.PasswordChar = checkBox1.Checked ? '*' : '\0';
}

Answer 4

For additional infomation:

There is an alternative in TextBox.PasswordChar, you can also use TextBox.UseSystemPasswordChar.

private void checkBox1_CheckedChanged(object sender, EventArgs e){
   textBox1.UseSystemPasswordChar = checkBox1.Checked ? true : false;
}