经常做信息编辑界面的时候遇到需要水印功能,还有错误信息显示,必填项显示等功能.没有统一的样式规范很麻烦。正好最近调整界面,在网上查找了些资料,自己写了一个TextBox控件,带有水印功能,是否必填项,以及错误信息的显示.
我语言组织不行,直接上代码
界面代码
<UserControl x:Class="TextBoxEdit.SelfWateMarkTextbox" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" mc:Ignorable="d" > <Grid> <StackPanel Orientation="Horizontal" Height="35"> <Label Name="IsInput" Foreground="Red" VerticalContentAlignment="Center" HorizontalContentAlignment="Center" Width="20">*</Label> <TextBox VerticalContentAlignment="Center" Width="300" Height="25" x:Name="textBox1" /> <Border Name="IsErrorShowBorder" BorderThickness="1" Height="27" CornerRadius="15" Visibility="Hidden"> <Label Name="IsError" Foreground="Red" Background="LightPink" VerticalContentAlignment="Center" HorizontalContentAlignment="Center">错误信息</Label> </Border> <TextBox VerticalContentAlignment="Center" Text="{Binding IsErroShow}" Height="25" x:Name="txtErrorShow" Visibility="Hidden"/> </StackPanel> </Grid> </UserControl>
后台代码
private const string defaultText = ""; private const string IsInputText = ""; private const string IsErrorText = ""; public SelfWateMarkTextbox() { InitializeComponent(); this.Loaded += new RoutedEventHandler(WateMarkTextbox_Loaded); this.GotFocus += new RoutedEventHandler(WateMarkTextbox_GotFocus); this.LostFocus += new RoutedEventHandler(WateMarkTextbox_LostFocus); this.textBox1.TextChanged += new TextChangedEventHandler(TextBox1_TextChanged); this.txtErrorShow.TextChanged += new TextChangedEventHandler(txtErrorShow_TextChanged); } void txtErrorShow_TextChanged(object sender, TextChangedEventArgs e) { if (!string.IsNullOrWhiteSpace(this.txtErrorShow.Text) && txtErrorShow.Text.ToLower() == "true") { IsErrorShowBorder.Visibility = Visibility.Visible; } else { IsErrorShowBorder.Visibility = Visibility.Hidden; } } void TextBox1_TextChanged(object sender, TextChangedEventArgs e) { if (!string.IsNullOrWhiteSpace(this.textBox1.Text) || this.textBox1.IsFocused) { this.textBox1.Text = this.textBox1.Text; } else { this.textBox1.Text = Watermark; } } void WateMarkTextbox_LostFocus(object sender, RoutedEventArgs e) { if (string.IsNullOrEmpty(this.textBox1.Text)) { this.textBox1.Text = string.Empty; } } void WateMarkTextbox_GotFocus(object sender, RoutedEventArgs e) { if (this.textBox1.Text.Equals(Watermark)) { this.textBox1.Text = string.Empty; } } void WateMarkTextbox_Loaded(object sender, RoutedEventArgs e) { this.textBox1.Text = Watermark; this.IsInput.Content = IsRequired; this.IsError.Content = IsErrorMessage; } public string Watermark { get { string result = (string)GetValue(WatermarkProperty); if (string.IsNullOrEmpty(result)) { result = defaultText; } return result; } set { SetValue(WatermarkProperty, value); } } public string IsRequired { get { string result = (string)GetValue(IsRequiredProperty); if (string.IsNullOrEmpty(result)) { result = IsInputText; } return result; } set { SetValue(IsRequiredProperty, value); } } public string IsErrorMessage { get { string result = (string)GetValue(IsErrorMessageProperty); if (string.IsNullOrEmpty(result)) { result = IsErrorText; } return result; } set { SetValue(IsErrorMessageProperty, value); } } public string IsErrorShow { set { txtErrorShow.Text = null; txtErrorShow.Text = value; } } readonly DependencyProperty WatermarkProperty = DependencyProperty.Register("Watermark", typeof(string), typeof(SelfWateMarkTextbox), new UIPropertyMetadata(defaultText)); public static readonly DependencyProperty IsRequiredProperty = DependencyProperty.Register("IsRequired", typeof(string), typeof(SelfWateMarkTextbox), new UIPropertyMetadata(IsInputText)); public static readonly DependencyProperty IsErrorMessageProperty = DependencyProperty.Register("IsErrorMessage", typeof(string), typeof(SelfWateMarkTextbox), new UIPropertyMetadata(IsErrorText));
MainWindow界面调用代码
<my:SelfWateMarkTextbox x:Name="wateMarkTextbox1" VerticalAlignment="Top" IsRequired="*" Watermark="请输入姓名" IsErrorMessage="请输入正常的姓名" Height="35" /> <Button Content="确定" Height="23" Width="120" Click="Button_Click"></Button>
MainWindow界面后台代码
private void Button_Click(object sender, RoutedEventArgs e) { wateMarkTextbox1.IsErrorShow = "true"; }
最终效果
输入时
错误信息显示
根据杨友山大大编写的,感谢杨友山大大的提供
http://blog.csdn.net/yysyangyangyangshan/article/details/9413237
时间: 2024-10-12 04:30:31