WPF中获取系统本身自带的控件模板(XAML)

每个控件都有自己默认的模板，这是MS本身就编写好的，如果我们能够得到这些模板的XAML代码，那么它将是学习模板的最好的示例，要想获得某个控件ctrl的默认模板，请调用以下方法：

         string GetTemplateXamlCode(Control ctrl)
         {

             FrameworkTemplate template = ctrl.Template;

             string xaml = "";

             if (template != null)
             {

                 XmlWriterSettings settings = new XmlWriterSettings();
                 settings.Indent = true;
                 settings.IndentChars = new string(' ', );
                 settings.NewLineOnAttributes = true;

                 StringBuilder strbuild = new StringBuilder();
                 XmlWriter xmlwrite = XmlWriter.Create(strbuild, settings);

                 try
                 {
                     XamlWriter.Save(template, xmlwrite);
                     xaml = strbuild.ToString();
                 }
                 catch (Exception exc)
                 {
                     xaml = exc.Message;
                 }
             }
             else
             {
                 xaml = "no template";
             }

             return xaml;
         }