创建扩展方法以生成打开和关闭标记，如Html.BeginForm（）

我想知道是否可以创建一个具有类似于Html.BeginForm（）的function和行为的扩展方法，因为它会生成一个完整的Html标记，我可以在标记内具体说明它的内容。

例如，我可以有一个视图：

在我尝试使用此问题中的示例生成的function的上下文中，此function非常有用

这将使我能够为我将要的类型创建容器

   <% using(Html.BeginDiv(myType, tag) %>    
    
  

我意识到这会产生无效的XHTML，但我认为可能有其他好处超过这个，特别是因为这个项目不需要XHTMLvalidationW3C标准。

谢谢

戴夫

Answer 1

不太确定这对于简单地定义

元素有多大的价值，但事情就像这样

 /// 
 /// Represents a HTML div in an Mvc View /// 
 public class MvcDiv : IDisposable { private bool _disposed; private readonly ViewContext _viewContext; private readonly TextWriter _writer; /// 
 /// Initializes a new instance of the  class. /// 
 /// The view context. public MvcDiv(ViewContext viewContext) { if (viewContext == null) { throw new ArgumentNullException("viewContext"); } _viewContext = viewContext; _writer = viewContext.Writer; } /// 
 /// Performs application-defined tasks associated with /// freeing, releasing, or resetting unmanaged resources. /// 
 public void Dispose() { Dispose(true /* disposing */); GC.SuppressFinalize(this); } /// 
 /// Releases unmanaged and - optionally - managed resources /// 
 /// true to release both /// managed and unmanaged resources; false /// to release only unmanaged resources. protected virtual void Dispose(bool disposing) { if (!_disposed) { _disposed = true; _writer.Write(""); } } /// 
 /// Ends the div. /// 
 public void EndDiv() { Dispose(true); } } /// 
 /// HtmlHelper Extension methods for building a div /// 
 public static class DivExtensions { /// 
 /// Begins the div. /// 
 /// The HTML helper. ///  public static MvcDiv BeginDiv(this HtmlHelper htmlHelper) { // generates 
 ... 
> return DivHelper(htmlHelper, null); } /// 
 /// Begins the div. /// 
 /// The HTML helper. /// The HTML attributes. ///  public static MvcDiv BeginDiv(this HtmlHelper htmlHelper, IDictionary htmlAttributes) { // generates 
 ... 
> return DivHelper(htmlHelper, htmlAttributes); } /// 
 /// Ends the div. /// 
 /// The HTML helper. public static void EndDiv(this HtmlHelper htmlHelper) { htmlHelper.ViewContext.Writer.Write(""); } /// 
 /// Helps build a html div element /// 
 /// The HTML helper. /// The HTML attributes. ///  private static MvcDiv DivHelper(this HtmlHelper htmlHelper, IDictionary htmlAttributes) { TagBuilder tagBuilder = new TagBuilder("div"); tagBuilder.MergeAttributes(htmlAttributes); htmlHelper.ViewContext.Writer.Write(tagBuilder.ToString(TagRenderMode.StartTag)); MvcDiv div = new MvcDiv(htmlHelper.ViewContext); return div; } } 

并使用这样的

 <% using (Html.BeginDiv(new Dictionary{{"class","stripey"}})) { %> 
Content Here
 <% } %> 

将呈现

 
 
Content Here
  

或没有html属性

 <% using (Html.BeginDiv()) { %> 
Content Here
 <% } %>