如何在C＃中将HtmlEncode / HtmlDecode转换为纯文本？

Question

I used CKEditor ASP.NET version and adjust to my writing space. When click btn_Post button, then should post written text in this editor field. I want to get this text in C# because for saving at database. So I searched how to use( here ) and found the way using HtmlEncode. Here is codes what I found.

asp

<div>
  <CKEditor:CKEditorControl ID="CKEditor1" BasePath="/ckeditor/" runat="server">
  </CKEditor:CKEditorControl>
</div>
<div style="margin-top:10px; float:right;">
  <asp:button ID="btn_Post" runat="server" Text="등록하기" CssClass="btn_Post" onclick="btn_Post_Click" />    
</div>

CS

string str = CKEditor1.Text;
string str1 = Server.HtmlEncode(str);
string str2 = Server.HtmlDecode(str);
//str = <p>1234</p>\r\n
//str1 = &lt;p&gt;1234&lt;/p&gt;\r\n
//str2 = <p>1234</p>\r\n 

But the problem is, I need to save text with none html codes. As you can see, all variable shows html code. How can I change this result to pure text 1234 ?

Answer 1

You can use this method

public static string RemoveHTMLTags(string content)
        {
            var cleaned = string.Empty;
            try
            {
                string textOnly = string.Empty;
                Regex tagRemove = new Regex(@"<[^>]*(>|$)");
                Regex compressSpaces = new Regex(@"[\s\r\n]+");
                textOnly = tagRemove.Replace(content, string.Empty);
                textOnly = compressSpaces.Replace(textOnly, " ");
                cleaned = textOnly;
            }
            catch
            {
                //A tag is probably not closed. fallback to regex string clean.

            }

            return cleaned;
        }

Or use HTML Agility Pack to remove all HTML tags.