如何取消屏蔽密码文本框并将其屏蔽回密码？

Question

如何将设置为 : 的密码文本框

password_txtBox.PasswordChar ="*"

取消屏蔽（从复选框），然后再次屏蔽
不会丢失文本框中的字符串

Answer 1

只需将该属性设置为'\0'（这是默认值）即可不屏蔽字符。

来源： http://msdn.microsoft.com /en-us/library/system.windows.forms.textbox.passwordchar.aspx

注意：请注意“\0”与“0”不同。第一个是空字符，白色“0”是将显示为 0 的字符。

Answer 2

对于winforms：

private void checkBoxShowPassword_CheckedChanged(object sender, EventArgs e) {
   textBoxPassword.PasswordChar = checkBoxShowPassword.Checked ? '\0' : '*';
}

Answer 3

如果您使用切换开关，那么

private void toggleSwitch1_Toggled(object sender, EventArgs e)
{
    if (toggleSwitch1.IsOn)
    {
        string a= textBox2.Text;
        textBox2.PasswordChar = '\0';
    }
    else
    {
        textBox2.PasswordChar = '*';
    }
}

此处 '\0' 将显示以纯文本形式提交的密码

Answer 4

txtPassword 是密码文本框，chkSeePassword 是显示密码复选框。现在向复选框的 CheckedChanged 事件添加一些代码

private void chkSeePassword_CheckedChanged(object sender, EventArgs e)
{
        txtPassword.UseSystemPasswordChar = !chkSeePassword.Checked;
}

Answer 5

显示和隐藏密码的最简单方法之一是使用密码文本框中的单选按钮。

单选按钮的属性应该类似于：

this.radioBtn_ShowHidePassword.AutoCheck = false;    

然后必须手动处理单击活动，使其与“当前状态”相反。单击“事件

private void radioBtn_ShowHidePassword_Click(object sender, EventArgs e)
{
 radioBtn_ShowHidePassword.Checked = (! radioBtn_ShowHidePassword.Checked);
}

，最后是显示和隐藏密码的最简单方法

private void radioBtn_ShowHidePassword_CheckedChanged(object sender, EventArgs e)
{
   txtBoxPassword.PasswordChar = radioBtn_ShowHidePassword.Checked ? '\0' : '*';
   // here we can even include the code for changing the default picture of button to two different
   //representation like closed eye and opened eye which resembles Windows login
}

Answer 6

我这样做是为了简单地显示密码
（我在编码方面还很陌生，所以如果这是一个不好的做法，欢迎反馈）

 private void buttonShowPassword_MouseDown(object sender, MouseEventArgs e)
    {
        TextBoxPassword.Properties.PasswordChar =(char)0;
    }

    private void buttonShowPassword_MouseUp(object sender, MouseEventArgs e)
    {
        TextBoxPassword.Properties.PasswordChar = '*';
    }

Answer 7

if(TokenTextBox.PasswordChar == (char)0)
{
   TokenTextBox.PasswordChar = '•';
}
else
{
   TokenTextBox.PasswordChar = (char)0;
}

Answer 8

用这个

private void checkBox1_CheckedChanged(object sender, EventArgs e)
    {
        textBox2.PasswordChar = default(char);
    }

Answer 9

VB.Net 版本是

Private Sub checkBoxShowPassword_CheckedChanged(sender As Object, e As System.EventArgs) Handles checkBoxShowPassword.CheckedChanged
    textBoxPassword.PasswordChar = If(checkBoxShowPassword.Checked, ControlChars.NullChar, "*"C)
End Sub

或

Private Sub CheckBox1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox1.CheckedChanged
    If CheckBox1.Checked Then
        Me.txt_password.PasswordChar = "*"c
    Else
        Me.txt_password.PasswordChar = ControlChars.NullChar
    End If
End Sub