using System.Collections.Generic;
using System.Web.Mvc;

namespace CommonTool
{

	public static class MvcHtml
	{
		/// <summary>
		/// 生成包含图片的超链接
		/// <remarks>注：若actionName为空，则超链接的地址为当前App的Home页；
		/// 若actionName不为空，controllerName为空，则超链接地址为当前App的Home页对应的Action
		/// </remarks>
		/// </summary>
		/// <param name="html"></param>
		/// <param name="imgSrc">图片地址</param>
		/// <param name="actionName"></param>
		/// <param name="controllerName"></param>
		/// <param name="routeValue"></param>
		/// <param name="imgCssStyle"></param>
		/// <returns></returns>
		/// 
		public static MvcHtmlString ActionLinkWithImage(this HtmlHelper html, string imgSrc, string actionName = "",
			string controllerName = "", object routeValue = null, string imgCssStyle = "border-style: none;")
		{
			var urlHelper = new UrlHelper(html.ViewContext.RequestContext);

			string imgUrl = urlHelper.Content(imgSrc);
			TagBuilder imgTagBuilder = new TagBuilder("img");
			IDictionary<string, object> imgAttributes = new Dictionary<string, object>();
			imgAttributes.Add("src", imgUrl);
			imgAttributes.Add("style", imgCssStyle); // 图片默认无边框
			imgTagBuilder.MergeAttributes(imgAttributes);
			string img = imgTagBuilder.ToString(TagRenderMode.SelfClosing);

			string linkUrl = urlHelper.Action(actionName, controllerName, routeValue);

			TagBuilder linkTagBuilder = new TagBuilder("a") {InnerHtml = img};
			linkTagBuilder.MergeAttribute("href", linkUrl);

			return new MvcHtmlString(linkTagBuilder.ToString(TagRenderMode.Normal));
		}
	}

}