试图在图片点击时隐藏密码

Question

试图在点击图片时隐藏密码，提供了代码 below.In xaml 部分我在后面的代码中使用了文本框来接受密码我已经编写了隐藏代码但是它在使可见性为假的同时给出错误。参考图片

<TextBox Name="txtBoxPassw"  Height="45" Width="246" InputScope="Password" Margin="10,5,5,5" Background="White" VerticalAlignment="Center"  
                         FontSize="25" FontFamily="Segoe UI Light" Visibility="Visible" Foreground="Black"  Padding="50,5,5,5" TextWrapping="Wrap"
                         BorderThickness="0,0,0,2" BorderBrush="Gray"  />
                <Canvas Margin="58,-45,136,0">
                    <Image x:Name="passLogo" Source="Assets/ic_pass.png" Height="41" Width="41" />
                </Canvas>
                <!--19oct-->
                <TextBlock Name="txtBlockPasswFieldError" Grid.Row="2" Margin="-60,0,0,0" Foreground="Black" Text="*Please enter valid name"
                      HorizontalAlignment="Center" Visibility="Visible" FontSize="11"/>
                <!--19oct-->
                <Image Name="showimg" Source="Assets/show_pass.png"  Width="25" Height="50" Margin="50,15,40,10" Tapped="Image_Tapped" Stretch="Uniform"/>
                <TextBlock Name="showPass"
                    Text="Show Password"
                    Foreground="#303030"  
                    FontSize="15"
                    FontFamily="Koblenz Serial Medium" 
                    Margin="200,-45,15,20" />

cs文件

private void Image_Tapped(object sender, TappedRoutedEventArgs e)
        {

            BitmapImage bitcurrentimage = showimg.Source as BitmapImage;
            //if (showimg.Source == new BitmapImage(new Uri("ms-appx:///Assets/show_pass.png", UriKind.RelativeOrAbsolute)))
            if (bitcurrentimage.UriSource.AbsoluteUri == "ms-appx:///Assets/show_pass.png")
            {
                //passBox.PasswordRevealMode = PasswordRevealMode.Visible;
                txtBoxPassw.Visibility = Visibility.Visible;
                showPass.Text = "Hide Password";
                SetImage("ms-appx:///Assets/hide_pass_.png");
            }
            else
            {
                //passBox.PasswordRevealMode = PasswordRevealMode.Hidden;
                txtBoxPassw.Visibility = Visibility.Visible.Equals(false);
                showPass.Text = "Show Password";
                SetImage("ms-appx:///Assets/show_pass.png");
            }

        }

Answer 1

在Winform中有一个文本框参数'PasswordChar'，如果你将它设置为一个字符（例如*），它将把文本框中的所有字符替换为该字符。如果将 passwordChar 设置为 '\o' (PasswordBox.PasswordChar = '\0';)，它将像正常情况一样显示所有字符。我希望 UWP 中有类似的东西 - 我不喜欢 UWP。

Answer 2

actually i want to put validation(if (Utility.isEmptyString(txtBoxPassw.Text)) on the string typed in passwordbox, but when i am trying it is giving error "'PasswordBox' does not contain a definition for 'Text' and no extension method 'Text' accepting a first argument of type 'PasswordBox' could be found (are you missing a using directive or an assembly reference?)"

这是您的最后一条评论，根据这条评论，我假设您接受使用内置控件的方法 PasswordBox 而不是创建您自己的控件。

那你可以参考PasswordBox class, unlike a TextBox or a TextBlock, PasswordBox does not have a property named "Text". I think what you need is the PasswordBox.Password property.

例如：

<PasswordBox x:Name="passwb" Height="30" IsPasswordRevealButtonEnabled="True" />
<Button Content="click" VerticalAlignment="Bottom" Click="Button_Click"  />

后面的代码：

private void Button_Click(object sender, RoutedEventArgs e)
{
    var pass = passwb.Password;
}

这里的pass表示"passwb".

的PasswordBox当前持有的密码

试图在图片点击时隐藏密码

Trying to hide password on image click

c#

xaml

uwp

uwp-xaml