无废话WPF系列11: 数据转换

有时我们展现的数据，需要进行转换，比如如果一个学生的成绩过了60，我们显示一个Pass的图片。

XAML:

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< Window  x:Class="DeepXAML.MainWindow"          xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"          xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"          xmlns:local="clr-namespace:DeepXAML"                xmlns:sys="clr-namespace:System;assembly=mscorlib"          Title="MainWindow" Height="250" Width="450">      < Window.Resources >          < local:ScoreToImageConverter  x:Key="sti"></ local:ScoreToImageConverter >      </ Window.Resources >      < StackPanel >          < ListBox  x:Name="listBoxStudents" Margin="10">              < ListBox.ItemTemplate >                  < DataTemplate >                      < StackPanel  Orientation="Horizontal">                          < TextBlock  Text="{Binding Path=Name}"></ TextBlock >                                                 < Image  Source="{Binding Path=Score,Converter={StaticResource sti}}" Height="20"></ Image >                      </ StackPanel >                  </ DataTemplate >              </ ListBox.ItemTemplate >          </ ListBox >      </ StackPanel > </ Window >

 

后台代码：

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using  System; using  System.Collections.Generic; using  System.Windows; using  System.Windows.Data; using  System.Windows.Documents;   namespace  DeepXAML {      public  partial  class  MainWindow : Window      {          public  MainWindow()          {              InitializeComponent();              List<Student> students = new  List<Student>{               new  Student{ Name= "Jack" , Score=90},                new  Student{Name= "Tom" , Score=30},                new  Student{ Name= "David" , Score=80}              };              this .listBoxStudents.ItemsSource = students;          }        }      public  class  Student      {          public  string  Name { get ; set ; }          public  double  Score { get ; set ; }      }      public  class  ScoreToImageConverter : IValueConverter      {          public  object  Convert( object  value, Type targetType, object  parameter,              System.Globalization.CultureInfo culture)          {              double  score = ( double )value;                return  score >= 60 ? @"\images\pass.gif"  : @"\images\nopass.gif" ;          }            public  object  ConvertBack( object  value, Type targetType, object  parameter,              System.Globalization.CultureInfo culture)          {              throw  new  NotImplementedException();          }      } }

 

运行结果

本文转自敏捷的水博客园博客，原文链接http://www.cnblogs.com/cnblogsfans/archive/2011/02/19/1958658.html如需转载请自行联系原作者

王德水