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页面输出html各种扩展，用法@html.方法名（）

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.Mvc;using System.Web.Routing;namespace XTShop.MVC5.Utility{
       public static class HtmlExtension    {
           /// 
        /// 自定义一个@html.Submit()        /// 
        ///         /// value属性        /// 预设的class        /// 
           public static MvcHtmlString Submit(this HtmlHelper helper, string value, string defaultClass = "btn btn-default")        {
               var builder = new TagBuilder("input");            builder.MergeAttribute("type", "submit");            builder.MergeAttribute("value", value);            builder.MergeAttribute("class", defaultClass);            builder.ToString(TagRenderMode.EndTag);            return MvcHtmlString.Create(builder.ToString());        }        /// 
        /// 换行        /// 
        ///         /// 
           public static MvcHtmlString Br(this HtmlHelper helper)        {
               var builder = new TagBuilder("br");            //builder.ToString(TagRenderMode.SelfClosing);//生成
            return MvcHtmlString.Create(builder.ToString(TagRenderMode.SelfClosing));        }        public static MvcHtmlString Image(this HtmlHelper helper, string src, string alt, string title, object htmlAttributes, string defaultClass = "btn btn-default")        {
               var builder = new TagBuilder("img");            builder.MergeAttribute("src", src);            builder.MergeAttribute("alt", alt);            builder.MergeAttribute("title", title);            builder.MergeAttribute("class", defaultClass);            builder.MergeAttributes
   
    (new RouteValueDictionary(htmlAttributes));            return MvcHtmlString.Create(builder.ToString(TagRenderMode.SelfClosing));        }        public static MvcHtmlString Link(this HtmlHelper helper, string href, string linkText, string defaultClass = "btn btn-default")        {
               var builder = new TagBuilder("a");            builder.MergeAttribute("href", href);            builder.SetInnerText(linkText);            builder.MergeAttribute("class", defaultClass);            return MvcHtmlString.Create(builder.ToString(TagRenderMode.Normal));        }        public static MvcHtmlString Button(this HtmlHelper helper, string id, string text, string onClick = null)        {
               var builder = new TagBuilder("input");            builder.GenerateId(id);            builder.MergeAttribute("type", "button");            builder.MergeAttribute("value", text);            if (!string.IsNullOrWhiteSpace(onClick)) builder.MergeAttribute("onclick", onClick);            builder.MergeAttribute("id", id);            builder.MergeAttribute("name", id);            return MvcHtmlString.Create(builder.ToString());        }        /// 
    
        /// 一个展示当前网站的view文件的        /// 
        /// 
            /// 
            public static MvcHtmlString ListViewAssemblies(this HtmlHelper helper)        {
               TagBuilder ul = new TagBuilder("ul");            foreach (var assembly in AppDomain.CurrentDomain.GetAssemblies().Where(a => a.FullName.StartsWith("App_Web_")))//view编辑后生成的都是以App_Web_开头的，            {
                   TagBuilder li = new TagBuilder("li");                li.InnerHtml = string.Format("类型完整名称:{0}", assembly.FullName);                ul.InnerHtml += li.ToString();                TagBuilder li2 = new TagBuilder("li");                li2.InnerHtml = string.Format("dll地址:{0}", assembly.Location);                ul.InnerHtml += li2.ToString();            }            return MvcHtmlString.Create(ul.ToString());        }    }}
   

使用方式

@{
       ViewBag.Title = "Second_Index";    int i = 10;  //多行}@{
    int j = 10; string x = "Advanced"; } @*单行*@  
   
this is Second Index
@ViewBag.Title
@*
@{
    ViewBag.Title}
*@  @*//行内 不能有大括号*@@if (i > 10){
        这里是一个链接}@for (int l = 0; l < 10; l++){
       @: 这里是一个链接     这里是一个链接 @l}@{
       //1.Html闭合的标签    //2.   @: 这里是一个链接    //3.text标签    
   
            欢迎大家来到.Net高级班的Vip课程；    
       
你好
}@section scripts{
       }@Html.Br()//其他类似

视图引擎扩展：用于不同浏览器展示不同页面

/// 
/// razor视图引擎扩展/// 
public class CustomerViewEngine : RazorViewEngine{
       /// 
    /// 可以分开部署不同语种    /// 
    ///     public CustomerViewEngine(string engineName)    {
           base.ViewLocationFormats = new[]            {
                   "~/Views" + engineName + "/{1}/{0}.cshtml",                "~/Views" + engineName + "/Shared/{0}.cshtml"            };        base.PartialViewLocationFormats = new[]            {
                   "~/Views" + engineName + "/{1}/{0}.cshtml",                "~/Views" + engineName + "/Shared/{0}.cshtml"            };        base.AreaViewLocationFormats = new[]            {
                   "~Areas/{2}/Views" + engineName + "/{1}/{0}.cshtml",                "~Areas/{2}/Views" + engineName + "/Shared/{0}.cshtml"            };        base.AreaPartialViewLocationFormats = new[]            {
                   "~Areas/{2}/Views" + engineName + "/{1}/{0}.cshtml",                "~Areas/{2}/Views" + engineName + "/Shared/{0}.cshtml"            };    }    public override ViewEngineResult FindView(ControllerContext controllerContext, string viewName, string masterName, bool useCache)    {
           this.SetEngine(controllerContext);        return base.FindView(controllerContext, viewName, masterName, useCache);    }    public override ViewEngineResult FindPartialView(ControllerContext controllerContext, string partialViewName, bool useCache)    {
           this.SetEngine(controllerContext);        return base.FindPartialView(controllerContext, partialViewName, useCache);    }    /// 
    /// 根据条件自行设置,目前是chrome浏览器就展示默认的    /// 不是chrome浏览器的话就展示/Themes/Eleven下的    /// 可以直接测试是移动端还是pc端    /// 然后写入cookie    /// 
    private void SetEngine(ControllerContext controllerContext)    {
           string engineName = "/Themes/XT";        //既然都能拿到HttpContext 那真的是可以为所欲为！        //浏览器类型/版本  移动端还是PC端   多语言网站(cookie).....        if (controllerContext.HttpContext.Request.UserAgent.IndexOf("Chrome/65") >= 0)        {
               engineName = null;        }        //if (controllerContext.HttpContext.Request.IsMobile())//检测是不是移动端        //{
           //    engineName = null;        //}        base.ViewLocationFormats = new[]           {
                   "~/Views" + engineName + "/{1}/{0}.cshtml",                "~/Views" + engineName + "/Shared/{0}.cshtml"            };        base.PartialViewLocationFormats = new[]            {
                   "~/Views" + engineName + "/{1}/{0}.cshtml",                "~/Views" + engineName + "/Shared/{0}.cshtml"            };        base.AreaViewLocationFormats = new[]            {
                   "~Areas/{2}/Views" + engineName + "/{1}/{0}.cshtml",                "~Areas/{2}/Views" + engineName + "/Shared/{0}.cshtml"            };        base.AreaPartialViewLocationFormats = new[]            {
                   "~Areas/{2}/Views" + engineName + "/{1}/{0}.cshtml",                "~Areas/{2}/Views" + engineName + "/Shared/{0}.cshtml"            };    }}

判断访问设备的扩展

/// 
        /// Request.Browser.IsMobileDevice        /// 
        ///         /// 
           public static bool IsMobile(this HttpRequestBase request)        {
               string userAgent = request.ServerVariables["HTTP_USER_AGENT"];            Regex b = new Regex(@"(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino", RegexOptions.IgnoreCase | RegexOptions.Multiline);            Regex v = new Regex(@"1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-", RegexOptions.IgnoreCase | RegexOptions.Multiline);            return (b.IsMatch(userAgent) || v.IsMatch(userAgent.Substring(0, 4)));        }

自定义jsonRsult扩展

/// 
    /// 自定义扩展json格式result    /// 
    public class NewtonsoftJsonResult : ActionResult    {
           private object _Data = null;        public NewtonsoftJsonResult(object data)        {
               _Data = data;        }        public override void ExecuteResult(ControllerContext context)        {
               var response = context.HttpContext.Response;            response.ContentType = "application/json";            response.Write(JsonHelper.ToJson(this._Data));        }    }

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