asp.net-mvc-3 - MVC3 razor 创建 HtmlButtonExtension 时出错

Question

我正在尝试使用 this 在我的页面上创建自定义 html 按钮

public static class HtmlButtonExtension 
{
  public static MvcHtmlString Button(this HtmlHelper helper, string text,
                                     IDictionary<string, object> htmlAttributes)
  {
      var builder = new TagBuilder("button");
      builder.InnerHtml = text;
      builder.MergeAttributes(htmlAttributes);
      return MvcHtmlString.Create(builder.ToString());
  }
}

当我单击此按钮时，我想将 recordID 传递给我的操作

下面是我添加到 Razor View 中的内容

@Html.Button("删除", new {name="CustomButton", recordID ="1"})

但是我无法显示此按钮，并且它抛出错误

'System.Web.Mvc.HtmlHelper<wmyWebRole.ViewModels.MyViewModel>' does not contain a definition for 'Button' and the best extension method overload 'JSONServiceRole.Utilities.HtmlButtonExtension.Button(System.Web.Mvc.HtmlHelper, string, System.Collections.Generic.IDictionary<string,object>)' has some invalid arguments

有人可以帮我找出实际的错误吗

Answer 1

您正在传递一个匿名对象，而不是 IDictionary<string, object>对于 htmlAttributes .

您可以使用 object htmlAttributes 添加额外的重载。这是他们在内置 ASP.NET MVC Html Helpers 中执行此操作的方式:

public static class HtmlButtonExtension 
{    
  public static MvcHtmlString Button(this HtmlHelper helper, string text,
                                     object htmlAttributes)
  {
      return Button(helper, text, HtmlHelper.AnonymousObjectToHtmlAttributes(htmlAttributes));
  }

  public static MvcHtmlString Button(this HtmlHelper helper, string text,
                                     IDictionary<string, object> htmlAttributes)
  {
      var builder = new TagBuilder("button");
      builder.InnerHtml = text;
      builder.MergeAttributes(htmlAttributes);
      return MvcHtmlString.Create(builder.ToString());
  }

}