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  • WP7>界面>ListBox数据绑定、图文混编、动态添加行

    问题:如何使用ListBox进行图文混编

      我的理解:实际就是对ListBox进行数据绑定(添加数据模板),然后动态添加行(ListItem)

    示例:

    前置条件:

    1)  XAML基础

    2)  C#基础

    3)  WP7基础  -> listbox使用基本知识  ->工程创建

    实现:

    目录:

    1)  创建一个基本应用

    2)  插入button及listbox控件

    3)  给listbox添加Item模板

    4)  创建Content及ContentCollection类

    5)  写入事件代码

    6)  测试运行

    1 创建一个基本应用

    1)  创建一个基本的Windows Phone应用程序,OS版本7.0

    2)  清除多余的界面元素(留下一个基本的Grid控件)

    1 <Grid x:Name="LayoutRoot" Background="Transparent">
    2 
    3 </Grid>

    2 插入button及listbox控件

     1     <Grid x:Name="LayoutRoot" Background="Transparent">
     2         <Grid.RowDefinitions>
     3             <RowDefinition Height="72*" />
     4             <RowDefinition Height="696*" />
     5         </Grid.RowDefinitions>
     6         <Button Content="Add" Height="72" HorizontalAlignment="Left" Margin="12,0,0,0" Name="button1" VerticalAlignment="Top" Width="160"/>
     7         <ListBox Grid.Row="1"  Name="listBox1">
     8 
     9         </ListBox>
    10     </Grid>

    3 给listbox添加Item模板

    1)  添加一个Itme模板属性

     1   <Grid x:Name="LayoutRoot" Background="Transparent">
     2         <Grid.RowDefinitions>
     3             <RowDefinition Height="72*" />
     4             <RowDefinition Height="696*" />
     5         </Grid.RowDefinitions>
     6         <Button Content="Add" Height="72" HorizontalAlignment="Left" Margin="12,0,0,0" Name="button1" VerticalAlignment="Top" Width="160" />
     7         <ListBox Grid.Row="1"  Name="listBox1">
     8             <ListBox.ItemTemplate>
     9                 <DataTemplate>
    10  
    11                 </DataTemplate>
    12             </ListBox.ItemTemplate>
    13         </ListBox>
    14     </Grid>

    2)  给Itme模板添加样式

    (注:Item模板的样式是看不到的,但是你可以将模板样式的代码放到新建页面中去看实际效果)

    样式代码:

     1                     <Grid Width="455" Height="120">
     2                         <Grid.ColumnDefinitions>
     3                             <ColumnDefinition Width="Auto" />
     4                             <ColumnDefinition Width="Auto" />
     5                         </Grid.ColumnDefinitions>
     6                         <Image Grid.Column="0" Width="120" Height="120" Stretch="Fill" HorizontalAlignment="Left" VerticalAlignment="Top"/>
     7                         <Grid Grid.Column="1" Name="grid1" >
     8                             <Grid.RowDefinitions>
     9                                 <RowDefinition Height="60*" />
    10                                 <RowDefinition Height="60*" />
    11                             </Grid.RowDefinitions>
    12                             <TextBlock Height="30" HorizontalAlignment="Left" Name="textBlock1" VerticalAlignment="Top" Width="332" Text="123" />
    13                             <TextBlock Grid.Row="1" Height="30" HorizontalAlignment="Left" Name="textBlock2" Text="234" VerticalAlignment="Top" Width="332" />
    14                         </Grid>
    15                     </Grid>

    新建一个页面,添加该样式的代码,效果如下:

    给模板添加样式后的代码:

     1 <Grid x:Name="LayoutRoot" Background="Transparent">
     2         <Grid.RowDefinitions>
     3             <RowDefinition Height="72*" />
     4             <RowDefinition Height="696*" />
     5         </Grid.RowDefinitions>
     6         <Button Content="Add" Height="72" HorizontalAlignment="Left" Margin="12,0,0,0" Name="button1" VerticalAlignment="Top" Width="160" />
     7         <ListBox Grid.Row="1"  Name="listBox1">
     8             <ListBox.ItemTemplate>
     9                 <DataTemplate>
    10                     <Grid Width="455" Height="120">
    11                         <Grid.ColumnDefinitions>
    12                             <ColumnDefinition Width="Auto" />
    13                             <ColumnDefinition Width="Auto" />
    14                         </Grid.ColumnDefinitions>
    15                         <Image Grid.Column="0" Width="120" Height="120" Stretch="Fill" HorizontalAlignment="Left" VerticalAlignment="Top"/>
    16                         <Grid Grid.Column="1" Name="grid1" >
    17                             <Grid.RowDefinitions>
    18                                 <RowDefinition Height="60*" />
    19                                 <RowDefinition Height="60*" />
    20                             </Grid.RowDefinitions>
    21                             <TextBlock Height="30" HorizontalAlignment="Left" Name="textBlock1" VerticalAlignment="Top" Width="332" Text="123" />
    22                             <TextBlock Grid.Row="1" Height="30" HorizontalAlignment="Left" Name="textBlock2" Text="234" VerticalAlignment="Top" Width="332" />
    23                         </Grid>
    24                     </Grid>
    25                 </DataTemplate>
    26             </ListBox.ItemTemplate>
    27         </ListBox>
    28     </Grid>

    3)  为Image控件及TextBlock控件添加绑定数据源

    为Image控件添加一个新属性source="{Binding Img}" 意思是Image的source属性绑定了Img这个量。(注:source可以是一个图片的网络地址,也可以是一个本地图片的地址)

    修改TextBlock控件的Text属性分别为Text="{Binding Time}" 和 Text="{Binding Count}",意思是这两个控件的text属性分别绑定了Time量和Count量。

    最终界面代码如下

     1     <Grid x:Name="LayoutRoot" Background="Transparent">
     2         <Grid.RowDefinitions>
     3             <RowDefinition Height="72*" />
     4             <RowDefinition Height="696*" />
     5         </Grid.RowDefinitions>
     6         <Button Content="Add" Height="72" HorizontalAlignment="Left" Margin="12,0,0,0" Name="button1" VerticalAlignment="Top" Width="160" Click="button1_Click" />
     7         <ListBox Grid.Row="1"  Name="listBox1">
     8             <ListBox.ItemTemplate>
     9                 <DataTemplate>
    10                     <Grid Width="455" Height="120">
    11                         <Grid.ColumnDefinitions>
    12                             <ColumnDefinition Width="Auto" />
    13                             <ColumnDefinition Width="Auto" />
    14                         </Grid.ColumnDefinitions>
    15                         <Image Grid.Column="0" Width="120" Height="120" Stretch="Fill" HorizontalAlignment="Left" VerticalAlignment="Top" Source="{Binding Img}"/>
    16                         <Grid Grid.Column="1" Name="grid1" >
    17                             <Grid.RowDefinitions>
    18                                 <RowDefinition Height="60*" />
    19                                 <RowDefinition Height="60*" />
    20                             </Grid.RowDefinitions>
    21                             <TextBlock Height="30" HorizontalAlignment="Left" Name="textBlock1" VerticalAlignment="Top" Width="332" Text="{Binding Time}" />
    22                             <TextBlock Grid.Row="1" Height="30" HorizontalAlignment="Left" Name="textBlock2" Text="{Binding Count}" VerticalAlignment="Top" Width="332" />
    23                         </Grid>
    24                     </Grid>
    25                 </DataTemplate>
    26             </ListBox.ItemTemplate>
    27         </ListBox>
    28     </Grid>

    4 创建Content及ContentCollection类

    1)  在界面中,Item模板绑定了3个量Img、Time、Count,对应的我们新建一个Content类

     1 using System;
     2 using System.Net;
     3 using System.ComponentModel;
     4 using System.Runtime.Serialization;
     5 using System.Collections.ObjectModel;
     6 
     7 namespace PhoneApp1
     8 {
     9     public class Content
    10     {
    11         private string time;
    12         private string count;
    13         private string img;
    14 
    15         public string Time
    16         {
    17             get { return time; }
    18             set
    19             {
    20                 if (time != value)
    21                     time = value;
    22                 NotifyPropertyChanged("Time");
    23             }
    24         }
    25 
    26         public string Count
    27         {
    28             get { return count; }
    29             set
    30             {
    31                 if (count != value)
    32                     count = value;
    33                 NotifyPropertyChanged("Count");
    34             }
    35         }
    36 
    37         public string Img
    38         {
    39             get { return img; }
    40             set
    41             {
    42                 if (img != value)
    43                     img = value;
    44                 NotifyPropertyChanged("Img");
    45             }
    46         }
    47 
    48         public event PropertyChangedEventHandler PropertyChanged;
    49         private void NotifyPropertyChanged(string info)
    50         {
    51             if (PropertyChanged != null)
    52             {
    53                 PropertyChanged(this, new PropertyChangedEventArgs(info));
    54             }
    55         }
    56     }
    57 }

    注:其中NotifyPropertyChanged("Img")中的“Img”对应的就是在界面中Source="{Binding Img}"中的Img

    2)  然后新建一个ContentCollection类

     1 using System;
     2 using System.Net;
     3 using System.ComponentModel;
     4 using System.Runtime.Serialization;
     5 using System.Collections.ObjectModel;
     6 
     7 namespace PhoneApp1
     8 {
     9     public class ContentCollection : ObservableCollection<Content>
    10     {
    11         public ContentCollection()
    12             : base()
    13         {
    14         }
    15     }
    16 }

    5 写入事件代码

     1     public partial class MainPage : PhoneApplicationPage
     2     {
     3         ContentCollection mySource;
     4         int count = 0;
     5         // 构造函数
     6         public MainPage()
     7         {
     8             InitializeComponent();
     9             mySource = new ContentCollection();
    10             listBox1.ItemsSource = mySource;
    11         }
    12 
    13         private void button1_Click(object sender, RoutedEventArgs e)
    14         {
    15             Content content = new Content();
    16             content.Img = "http://pic.cnblogs.com/face/u97911.jpg";
    17             content.Time = DateTime.Now.ToString();
    18             content.Count = count.ToString();
    19             count++;
    20             mySource.Add(content);
    21         }
    22     }

    6 测试运行

    点击Add按钮若干次

    说明:

       listbox图文混编有几个要点:

        1)  设置其Item的样式

        2)  创建一个对应的实体数据Content

        3)  使用mySource使界面更新

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  • 原文地址:https://www.cnblogs.com/cation/p/2751030.html
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