教你如何理解WPF中的Template類
Template用于定義控件結(jié)構(gòu)(Visual Tree),和Style有點(diǎn)容易混淆,每個(gè)控件初始沒有Style屬性,而在WPF中所有的控件都有默認(rèn)的Template。
列舉Template結(jié)構(gòu)
FrameworkTemplate & ControlTemplate
ControlTemplate 添加了兩個(gè)屬性: TargetType,Triggers
舉例各種Template 1. ControlTempalte - 自定義BUTTON
"WpfApplication1.Window2" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window2" Height="300" Width="300">"ItemsPanelTemplate1"> "True" Orientation="Horizontal"/> "10,10,22,73" Name="listBox1" ItemsPanel="{DynamicResource ItemsPanelTemplate1}" />
效果:
2. ItemsTemplate - 自定義ListBox對齊方式
"WpfApplication1.Window2" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window2" Height="300" Width="300">"ItemsPanelTemplate1"> "True" Orientation="Horizontal"/> "10,10,22,73" Name="listBox1" ItemsPanel="{DynamicResource ItemsPanelTemplate1}" />
TIP: VirtualizingStackPanel 可以替換為其他ItemsPanel,如WrapPanel,StackPanel,UnifromGrid等。
3. DataTemplate - 自定義ListBox ItemTemplate頁面代碼
"WpfApplication1.Window2" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window2" Height="351" Width="473" xmlns:WpfApplication1="clr-namespace:WpfApplication1" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d">"ItemsPanelTemplate1"> "Auto" Height="Auto" Columns="5" Rows="3"/> "DataTemplate1"> "111" Width="119" x:Name="grid" Background="#33ECF678"> "Left" Margin="8,8,0,0" VerticalAlignment="Top" Width="103" Height="96" OpacityMask="#FFFFFFFF" Source="{Binding Path=ImageSource, Mode=Default}"/>
"MyDataDS" ObjectType="{x:Type WpfApplication1:MyData}" d:IsDataSource="True"/> "listbox1" Margin="10,10,8,8" ItemsSource="{Binding}" ItemsPanel="{DynamicResource ItemsPanelTemplate1}" ItemTemplate="{DynamicResource DataTemplate1}" Background="#3FDEF5E3" />
邏輯代碼
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Shapes; using System.IO; namespace WpfApplication1 { ////// Interaction logic for Window2.xaml /// public partial class Window2 : Window { public Window2() { InitializeComponent(); listbox1.DataContext = GetPictures(); } private IEnumerableGetPictures() { foreach(string str in Directory.GetFiles(@"C:\Users\Public\Pictures\Sample Pictures")) yield return new MyData() {ImageSource = str}; } } public class MyData { public string ImageSource { get; set; } } }
效果
我眼中的最佳實(shí)踐
1. Please USE Blend to Customize Templates
請使用Blend來自定義模板
2. USE BasedOn Property Of Style
使用Style上的BasedOn屬性
3. 使用共享資源,達(dá)到樣式&Template重用
HOW: 在App.xaml中設(shè)置獨(dú)立資源,或者使用外部資源
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