水印控件windows phone中,制作一个自定义的密码输入框控件,含图片,有水印,星号显示

PS:今天上午,非常郁闷,有很多简单基础的问题搞得我有些迷茫,哎,代码几天不写就忘。目前又不当COO,还是得用心记代码哦!

    最终结果:

    水印和控件

    关键点:

    

  • 密码框中有图片之类的其他元素
  • 在没有密码输入的时候,会表现诸如如图“密码”的水印
  • 密码输入后,成“*”星号表现

    新建一个控件,XAML代码如下:

<UserControl
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:toolkit="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone.Controls.Toolkit" x:Class="ewlan.PassWordBoxWithIcon"
    mc:Ignorable="d"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}" d:DesignWidth="480" Height="60" Width="400">
    
    <Grid x:Name="LayoutRoot" Background="{StaticResource TransparentBrush}">
//用一个border实现外面的灰色边框
         <Border BorderBrush="#FFBFBFBF" BorderThickness="2" Margin="0">
    		<StackPanel Orientation="Horizontal">
                <Grid Margin="10,0,0,0">
                    <Image Name="rememberPassword" HorizontalAlignment="Center" Source="/Images/password_icon.png" Stretch="None" VerticalAlignment="Center" Margin="0"/>
                    <Image Name="forgetPassword" Visibility="Collapsed" HorizontalAlignment="Center" Source="/Images/password_unlock_icon.png" Stretch="None" VerticalAlignment="Center" Margin="0"/>
                </Grid>
                <Grid Width="351">
                    //1.PhoneTextBox实现水印效果
                    //2.PasswordBox实现密码输入酿成“*”号效果
                    //3.两个控件做到大小分歧,为什么?一会再看!
                    <toolkit:PhoneTextBox Hint="静态密码" x:Name="passwordWatermark" Margin="0" FontSize="24" Width="270" HorizontalAlignment="Left" BorderThickness="0" Height="70" VerticalAlignment="Center"/>
                    <PasswordBox KeyDown="passwdInput_KeyDown"  Margin="0" x:Name="passwdInput" MaxLength="20" LostFocus="PasswordLostFocus" Opacity="0" GotFocus="PasswordGotFocus" Password="{Binding Password, Mode=TwoWay}" FontSize="24" Width="270" HorizontalAlignment="Left" BorderThickness="0" Height="70" VerticalAlignment="Center"/>
                </Grid>
            </StackPanel>
    	</Border>
    </Grid>
</UserControl>
    每日一道理
“多难兴才”曾一度被人定为规律。请看:屈原被放逐而作《离骚》;司马迁受宫刑而作《史记》;欧阳修两岁丧父笃学而成才;曹雪芹举家食粥而写出了不朽的《红楼梦》;越王勾践卧薪尝胆而雪洗国耻;韩信遭胯下辱而统率百万雄兵……他们都是在与逆境搏斗中成为伟人的!

    以下是CS代码:

public partial class PassWordBoxWithIcon : UserControl
    {


        public PassWordBoxWithIcon()
        {
            InitializeComponent();
            passWordBoxWithIconInstance = this;
        }

        //在手指头分开密码输入框后,检查水印表现逻辑
        private void PasswordLostFocus(object sender, RoutedEventArgs e)
        {
            CheckPasswordWatermark();
        }

        
        public void CheckPasswordWatermark()
        {
            //发明用户没有输入,则将PasswordBox置于透明,PhoneTextBox置于100%不透明,以表现水印
            //用户有输入,则相反,目标是用户不再看到水印!
            var passwordEmpty = string.IsNullOrEmpty(passwdInput.Password.Trim());
            passwordWatermark.Opacity = passwordEmpty ? 100 : 0;
            passwdInput.Opacity = passwordEmpty ? 0 : 100;
        }

        private void PasswordGotFocus(object sender, RoutedEventArgs e)
        {
            //用户触摸取得焦点时,我们让passwordbox显现出来,以供输入!
            passwordWatermark.Opacity = 0;
            passwdInput.Opacity = 100;
        }
    }

    聪明的你肯定明确了,好,就此结束!

文章结束给大家分享下程序员的一些笑话语录: 这个世界上只有10种人:懂得二进制的和不懂得二进制的。

--------------------------------- 原创文章 By
水印和控件
---------------------------------

posted @ 2013-05-28 23:23  xinyuyuanm  阅读(331)  评论(0编辑  收藏  举报