C# 使用自定义Html帮助程序将图像作为链接：如何在RouteValueDictionary中传递数据

我正在使用这些html帮助程序：

    /*
     * Image Link HTML helper
    */

    /// <summary>
    /// return image link
    /// </summary>
    /// <param name="_helper"></param>
    /// <param name="_imageUrl">URL for image</param>
    /// <param name="_controller">target controller name</param>
    /// <param name="_action">target action name</param>
    /// <param name="_linkText">anchor text</param>
    public static MvcHtmlString ImageLink(this HtmlHelper _helper, string _imageUrl, string _controller, 
                                   string _action, string _linkText)
    {
        return ImageLink(_helper, null, _controller, _action, _linkText, _imageUrl, null, null, null, null);
    }

    /// <summary>
    /// return image link
    /// </summary>
    /// <param name="_helper"></param>
    /// <param name="_imageUrl">URL for image</param>
    /// <param name="_controller">target controller name</param>
    /// <param name="_action">target action name</param>
    /// <param name="_linkText">anchor text</param>
    /// <param name="_htmlAttributes">anchor attributes</param>
    public static MvcHtmlString ImageLink(this HtmlHelper _helper, string _imageUrl, string _controller,
                                          string _action, string _linkText, object _htmlAttributes)
    {
        return ImageLink(_helper, null, _controller, _action, _linkText, _imageUrl, null, null, new RouteValueDictionary(_htmlAttributes), null);
    }

    /// <summary>
    /// return image link
    /// </summary>
    /// <param name="_helper"></param>
    /// <param name="_imageUrl">URL for image</param>
    /// <param name="_controller">target controller name</param>
    /// <param name="_action">target action name</param>
    /// <param name="_linkText">anchor text</param>
    /// <param name="_htmlAttributes">anchor attributes</param>
    /// <param name="_routeValues">route values</param>
    public static MvcHtmlString ImageLink(this HtmlHelper _helper, string _imageUrl, string _controller,
                                          string _action, string _linkText, object _htmlAttributes, object _routeValues)
    {
        return ImageLink(_helper, null, _controller, _action, _linkText, _imageUrl, null, null, new RouteValueDictionary(_htmlAttributes), new RouteValueDictionary(_routeValues));
    }

    /// <summary>
    /// return image link
    /// </summary>
    /// <param name="_helper"></param>
    /// <param name="_id">Id of link control</param>
    /// <param name="_controller">target controller name</param>
    /// <param name="_action">target action name</param>
    /// <param name="_linkText"></param>
    /// <param name="_strImageURL">URL for image</param>
    /// <param name="_alternateText">Alternate Text for the image</param>
    /// <param name="_strStyle">style of the image like border properties, etc</param>
    /// <returns></returns>
    public static MvcHtmlString ImageLink(this HtmlHelper _helper, string _id, string _controller,
                                          string _action, string _linkText, string _strImageURL,
                                          string _alternateText, string _strStyle)
    {
        return ImageLink(_helper, _id, _controller, _action, _linkText, _strImageURL, _alternateText, _strStyle, null, null);
    }

    /// <summary>
    /// return image link
    /// </summary>
    /// <param name="_helper"></param>
    /// <param name="_id">Id of link control</param>
    /// <param name="_controller">target controller name</param>
    /// <param name="_action">target action name</param>
    /// <param name="_linkText">anchor text</param>
    /// <param name="_strImageURL">URL for image</param>
    /// <param name="_alternateText">Alternate Text for the image</param>
    /// <param name="_strStyle">style of the image like border properties, etc</param>
    /// <param name="_htmlAttributes">html attribues for link</param>
    /// <param name="_routeValues"></param>
    /// <returns></returns>
    public static MvcHtmlString ImageLink(this HtmlHelper _helper, string _id, string _controller,
                                          string _action, string _linkText, string _strImageURL, string _alternateText,
                                          string _strStyle, IDictionary<string, object> _htmlAttributes, RouteValueDictionary _routeValues)
    {
        // Build the img tag
        TagBuilder image = new TagBuilder("img");
        image.MergeAttribute("src", VirtualPathUtility.ToAbsolute(_strImageURL));
        image.MergeAttribute("alt", _alternateText);
        image.MergeAttribute("valign", "middle");
        image.MergeAttribute("border", "none");

        TagBuilder span = new TagBuilder("span");

        // Create tag builder
        var anchor = new TagBuilder("a");
        var url = new UrlHelper(_helper.ViewContext.RequestContext).Action(_action, _controller, _routeValues);

        // Create valid id
        anchor.GenerateId(_id);

        // Add attributes
        //anchor.MergeAttribute("href", "/" + controller + "/" + action); //form target URL
        anchor.MergeAttribute("href", url);
        anchor.MergeAttribute("class", "actionImage");
        if (_htmlAttributes != null)
            anchor.MergeAttributes(new RouteValueDictionary(_htmlAttributes));

        // place the img tag inside the anchor tag.
        if (String.IsNullOrEmpty(_linkText))
        {
            anchor.InnerHtml = image.ToString(TagRenderMode.Normal);
        }
        else
        {
            span.InnerHtml = _linkText;
            anchor.InnerHtml = image.ToString(TagRenderMode.Normal) + " " + span.ToString(TagRenderMode.Normal);
        }

        // Render tag
        return MvcHtmlString.Create(anchor.ToString(TagRenderMode.Normal)); //to add </a> as end tag
    }

你看，我的控制器中的“详细信息”操作使用id，因此在本例中，我需要如下链接：

/Object/Details/1

1作为我可以在此对象中找到的对象ID。但我不知道如何将id传递给对象，因为上面的方法使用RouteDictionaryValue，我不知道它是如何工作的，所以我最终得到了以下链接：

/Object/Details

---

当然，这是行不通的。如何将ID或所需数据传递给HtmlHelper以创建实际工作的链接？

经过大量的解决后，我有点明白了

我必须更改我的链接：

@Html.ImageLink("objectImage", "Object", "Details", null, Model[i].m_ObjThumbnailLink, Model[i].m_ObjName, null, null, null)

像这样：

@Html.ImageLink("objectImage", "Object", "Details", null, Model[i].m_ObjThumbnailLink, Model[i].m_ObjName, null, null, null)

@Html.ImageLink("objectImage", "Object", "Details", null, Model[i].m_ObjThumbnailLink, Model[i].m_ObjName, null, null, new RouteValueDictionary(new { @id = Model[i].m_ObjID}))

---

。。。安，那很好用。但我仍然不明白什么是RouteValueDictionary，所以请随意发布一些东西，因为我肯定会阅读它们

您可以从阅读MSDN说明开始