c# - How do you sanitize and publish HTML into ASP.Net View? -


my goal

save , post html blog post using c# asp.net mvc, using best practices

how do this?

below source causes following error:

error 2 operator '.' cannot applied operand of type 'lambda expression'

articlecontent.cs (controller)

  // post: article/articles/create     [httppost]     [validateantiforgerytoken]     [authorize(roles = "canedit")]     public actionresult create([bind(include = "postid,title,publishdate,createdate,modifydate,author,pagebody,feature,published,excerpt,createdateutc,publishdateutc,modifydateutc,canonicalurl,urlslug,category,tag")] articlecontent articles)     {         if (modelstate.isvalid)         {             db.articles.add(articles);             db.savechanges();             return redirecttoaction("index");         }          return view(articles);     }

article.cs (model)

    [display(name = "body of article")]     public string pagebody { get; set; }

index.cshtml (view) <-- trigger

@html.raw(httputility.htmldecode((modelitem => modelitem.pagebody).tostring().substring(0,250)))

index.cshtml (full version of view)

<section class="bg-ocean row light text-center shelve">         @if (user.isinrole("cancreate"))         {             <button class="btn btn-info btn-lg btn-block">                 @html.actionlink("create new", "create")             </button>         }         @foreach (var item in model)         {                 <article class="headline">                         <div class="col-xs-12 col-md-7 headline-image np nm">                             <a href="@url.action("details", "details", new { id = item.postid })" target="_blank">                                 <img src="@html.displayfor(modelitem => item.feature)" />                                 <span>                                     @html.displayfor(modelitem => item.categories)                                 </span>                             </a>                         </div>                         <div class="col-xs-12 col-md-5 bg-light headline-content np nm">                             <a href="@url.action("details", "details", new { id = item.postid })" target="_blank">                                 <small class="dark">@html.displayfor(modelitem => item.modifydate)</small>                                 <h2 class="media-heading dark">@html.displayfor(modelitem => item.title)</h2>                                 <hr />                                 <p>@html.displayfor(modelitem => item.excerpt)</p>                             </a>                             <div class="headline-footer">                                 <div class="btn-group btn-group-justified">                                     <span class="btn btn-default" role="button"><i class="fa fa-eye"></i> 172</span>                                     <span class="btn btn-default" role="button"><i class="fa fa-comment"></i><a href="@url.action("details", "details", new { id = item.postid + "%23disqus_thread" })"></a></span>                                     <span class="btn btn-default highlight" role="button"><i class="fa fa-share"></i> 210</span>                                 </div>                             </div>                         </div>                             @if (user.isinrole("canedit"))                             {                                 @html.actionlink("e", "edit", new { id = item.postid })                             }                             @if (user.isinrole("candelete"))                             {                                 @html.actionlink("d", "delete", new { id = item.postid })                             }             </article>         } </section>

questions resources

how save html database , retrieve properly

text both raw , parsed html

future note

using .substring(0,250) null value creates error due strings 0 - 250 not existing.

the httputility.htmldecode takes string , returns another. pass lambda expression (modelitem => modelitem.pagebody) on tostring- , substring methods called.

you must change code following:

@html.raw(httputility.htmldecode(model.pagebody).substring(0,250))

in code, give pagebody property htmldecode method , call substring. string given raw method.

much methods @html.editorfor take lambda argument, htmldecode needs string. main problem.

ps: if pagebodyis not string, must call tostringon before passing htmldecode.


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