Validation detected dangerous client input - post from TinyMCE in ASP.NET

Question

I get this error when I post from TinyMCE in an ASP.NET MVC view.

Error:

Request Validation has detected a potentially dangerous clien

Answer 1

Use the decorator [ValidateInput(false)].

You will then want to write a HTMLEncode method to make it safe.

Let me know if you want me to post the one I use.

Added the Encode I use

    public static class StringHelpers
{
    public static string HtmlEncode(this string value)
    {
        if (!string.IsNullOrEmpty(value))
        {
            value = value.Replace("<", "<");
            value = value.Replace(">", ">");
            value = value.Replace("'", "'");
            value = value.Replace(@"""", """);
        }
        return value;
    }

    public static string HtmlDecode(this string value)
    {
        if (!string.IsNullOrEmpty(value))
        {
            value = value.Replace("<", "<");
            value = value.Replace(">", ">");
            value = value.Replace("'", "'");
            value = value.Replace(""", @"""");
        }

        return value;
    }
}