WPF中獲取系統本身自帶的控制項模板(XAML)

       每個控制項都有自己預設的模板，這是MS本身就編寫好的，如果我們能夠得到這些模板的XAML代碼，那麼它將是學習模板的最好的示例，要想獲得某個控制項ctrl的預設模板，請調用以下方法：

 1         string GetTemplateXamlCode(Control ctrl)
 2         {
 3 
 4             FrameworkTemplate template = ctrl.Template;
 5 
 6             string xaml = "";
 7 
 8             if (template != null)
 9             {
10 
11                 XmlWriterSettings settings = new XmlWriterSettings();
12                 settings.Indent = true;
13                 settings.IndentChars = new string(' ', 4);
14                 settings.NewLineOnAttributes = true;
15 
16                 StringBuilder strbuild = new StringBuilder();
17                 XmlWriter xmlwrite = XmlWriter.Create(strbuild, settings);
18 
19                 try
20                 {
21                     XamlWriter.Save(template, xmlwrite);
22                     xaml = strbuild.ToString();
23                 }
24                 catch (Exception exc)
25                 {
26                     xaml = exc.Message;
27                 }
28             }
29             else
30             {
31                 xaml = "no template";
32             }
33 
34             return xaml;
35         }