Asp.net mvc HtmlHelper方法和RouteValueDictionary

在编写htmlhelper扩展时，如果我想为我的htmlhelper扩展方法支持类似结构的CTOR，我使用

RouteValueDictionary

，如下所示：

public static string ListBoxDict(this HtmlHelper htmlHelper, 
                                 string name, 
                                 object value, 
                                 object htmlAttributes)
{
    return ListBoxDict(htmlHelper, 
                       name, 
                       value, 
                       ((IDictionary<string, object>)
                           new RouteValueDictionary(htmlAttributes)));
}

public static string TextBox(this HtmlHelper htmlHelper, 
                             string name, 
                             object value, 
                             object htmlAttributes)
{
    return TextBox(htmlHelper, 
                   name, 
                   value,
                   new RouteValueDictionary(htmlAttributes))
}

---

显然这是一条捷径，但这是一种卑鄙的做法还是可以这样做？

我强烈建议大家看看罗伯·科纳利关于这方面的文章

它的肉和蔬菜是这样的：

代码转储：

public static string ToAttributeList(this object list)
{
  StringBuilder sb = new StringBuilder();
  if (list != null)
  {
    Hashtable attributeHash = GetPropertyHash(list);
    string resultFormat = "{0}=\"{1}\" ";
    foreach (string attribute in attributeHash.Keys)
    {
      sb.AppendFormat(resultFormat, attribute.Replace("_", ""), 
          attributeHash[attribute]);
    }
  }
  return sb.ToString();
}

public static string ToAttributeList(this object list,
                                     params object[] ignoreList)
{
  Hashtable attributeHash = GetPropertyHash(list);

  string resultFormat = "{0}=\"{1}\" ";
  StringBuilder sb = new StringBuilder();
  foreach (string attribute in attributeHash.Keys)
  {
    if (!ignoreList.Contains(attribute))
    {
      sb.AppendFormat(resultFormat, attribute, 
          attributeHash[attribute]);
    }
  }
  return sb.ToString();
}

public static Hashtable GetPropertyHash(object properties)
{
  Hashtable values = null;

  if (properties != null)
  {
    values = new Hashtable();
    PropertyDescriptorCollection props = 
        TypeDescriptor.GetProperties(properties);

    foreach (PropertyDescriptor prop in props)
    {
      values.Add(prop.Name, prop.GetValue(properties));
    }
  }
  return values;
}

public static string ListBoxDict(this HtmlHelper htmlHelper, 
                                 string name, 
                                 object value, 
                                 object htmlAttributes)
{
    return htmlHelper.ListBoxDict(name,
                                  value,
                                  htmlAttributes.ToAttributeList()));
}

用法：

public static string ToAttributeList(this object list)
{
  StringBuilder sb = new StringBuilder();
  if (list != null)
  {
    Hashtable attributeHash = GetPropertyHash(list);
    string resultFormat = "{0}=\"{1}\" ";
    foreach (string attribute in attributeHash.Keys)
    {
      sb.AppendFormat(resultFormat, attribute.Replace("_", ""), 
          attributeHash[attribute]);
    }
  }
  return sb.ToString();
}

public static string ToAttributeList(this object list,
                                     params object[] ignoreList)
{
  Hashtable attributeHash = GetPropertyHash(list);

  string resultFormat = "{0}=\"{1}\" ";
  StringBuilder sb = new StringBuilder();
  foreach (string attribute in attributeHash.Keys)
  {
    if (!ignoreList.Contains(attribute))
    {
      sb.AppendFormat(resultFormat, attribute, 
          attributeHash[attribute]);
    }
  }
  return sb.ToString();
}

public static Hashtable GetPropertyHash(object properties)
{
  Hashtable values = null;

  if (properties != null)
  {
    values = new Hashtable();
    PropertyDescriptorCollection props = 
        TypeDescriptor.GetProperties(properties);

    foreach (PropertyDescriptor prop in props)
    {
      values.Add(prop.Name, prop.GetValue(properties));
    }
  }
  return values;
}

public static string ListBoxDict(this HtmlHelper htmlHelper, 
                                 string name, 
                                 object value, 
                                 object htmlAttributes)
{
    return htmlHelper.ListBoxDict(name,
                                  value,
                                  htmlAttributes.ToAttributeList()));
}

.ToAttributeList（）

所做的是将htmlAttribute对象转换为

name=“value”

---

希望这有意义。

谢谢Dan，看起来很有趣，我来看看。我编辑了我的问题，因为我没有说我在遵循mvc框架助手中已经存在的东西。我在另一个项目中再次寻找这个，并找到了我自己的答案！真幸运@戈德比肖普修好了链环。回程机意外频繁地帮助断开链接…@CristiDiaconescu谢谢！该博客现在位于子域上，因此我现在已更正此问题。：）酷@RobConery Tsk Tsk，路由重定向；）