我們平時自定義WPF控件的方法有：Style，DataTemplate，ControlTemplate， DependencyProperty， CustomControl等幾個方法。 按照優先順序應該是從左到右。（所謂Style，這里僅包括Setter） 對于搜索框，其組成也就是TextBox+Button（清空），這里我們用CustomControl的方法比較合適。 1.創建SearchBox繼承于TextBox，并聲明2個Part屬性， 表明此控件組成 ~~~ [TemplatePart(Name = "PART_SearchTextBox", Type = typeof(TextBox))] ~~~ ~~~ [TemplatePart(Name = "PART_ClearButton", Type = typeof(Button))] ~~~ ~~~ public class SearchBox : TextBox ~~~ ~~~ 2.創建2個子控件的Style， 注意ControlTemplate中的子控件命名和上述屬性聲明一致 ~~~ ~~~ ~~~ <Style TargetType="{x:Type local:SearchBox}"> ~~~ ~~~ ~~~ <Setter Property="Template"> ~~~ ~~~ <Setter.Value> ~~~ ~~~ <ControlTemplate TargetType="{x:Type local:SearchBox}"> ~~~ ~~~ <!-------------子控件PART_SearchTextBox,PART_ClearButton及其它設置---------------> ~~~ ~~~ </ControlTemplate> ~~~ ~~~ </Setter.Value> ~~~ ~~~ </Setter> ~~~ ~~~ </Style> ~~~ ~~~ 3.如果在當前程序集里，必須放在.\Themes文件夾下; 必須在程序集的AssemblyInfo.cs里指定ThemeInfo（用來指定控件默認Style） ~~~ ~~~ ~~~ [assembly: ThemeInfo( ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located //(used if a resource is not found in the page, // or application resource dictionaries) ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located //(used if a resource is not found in the page, // app, or any theme specific resource dictionaries) )] ~~~ ~~~ 4.在自定義控件的實現中注冊路由事件等等其它邏輯處理 ~~~ ~~~ 比如：對子元素Clear按鈕進行處理 ~~~ ~~~ ~~~ public override void OnApplyTemplate() ~~~ ~~~ { base.OnApplyTemplate(); Button btnClear = base.GetTemplateChild("PART_ClearButton") as Button; if (btnClear != null) ~~~ ~~~ { btnClear.Click += new RoutedEventHandler(OnClearButton_Click); ~~~ ~~~ } } private void OnClearButton_Click(Object sender, RoutedEventArgs e) ~~~ ~~~ { TextBox txtSearch = base.GetTemplateChild("PART_SearchTextBox") as TextBox; if (txtSearch!= null) ~~~ ~~~ { txtSearch.Text = String.Empty; ~~~ ~~~ txtSearch.Focus(); ~~~ ~~~ } } ~~~ ~~~ ~~~ ~~~ ~~~