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AngleSharp

, 3 Jul 2013 BSD
Bringing the DOM to C# with a HTML5/CSS3 parser written in C#.
Demo.zip
AngleSharp
Css
Tokens
DOM
Collections
Css
Properties
Rules
Selector
Values
Enums
Exception
Html
Basic
Formatting
Forms
Frames
Head
Lists
Media
Objects
Semantic
Tables
Interfaces
Mathml
Objects
Svg
Various
Xml
Foundation
Attributes
Helpers
Mutations
Html
Tokens
Properties
Stream
Xml
Tokens
packages
ModernUI.WPF.1.0.4
lib
net40
FirstFloor.ModernUI.dll
Microsoft.Windows.Shell.dll
net45
FirstFloor.ModernUI.dll
ModernUI.WPF.1.0.4.nupkg
ModernUI.WPF.1.0.4.nuspec
OxyPlot.Core.2013.1.49.1
lib
portable-net4+sl4+wp71+win8
OxyPlot.dll
OxyPlot.Core.2013.1.49.1.nupkg
OxyPlot.Core.2013.1.49.1.nuspec
OxyPlot.Wpf.2013.1.49.1
lib
NET40
OxyPlot.Wpf.dll
OxyPlot.Xps.dll
NET45
OxyPlot.Wpf.dll
OxyPlot.Xps.dll
OxyPlot.Wpf.2013.1.49.1.nupkg
OxyPlot.Wpf.2013.1.49.1.nuspec
Samples
Logo.ico
Pages
Properties
Settings.settings
ViewModels
Source.zip
Documents
using System;

namespace AngleSharp.DOM.Html
{
    /// <summary>
    /// Represents the keygen element.
    /// </summary>
    public sealed class HTMLKeygenElement : HTMLFormControlElementWithState, IValidation
    {
        #region Constant

        /// <summary>
        /// The keygen tag.
        /// </summary>
        internal const string Tag = "keygen";

        #endregion

        #region Members

        ValidityState vstate;
        private string error;

        #endregion

        #region ctor

        /// <summary>
        /// Creates a new HTML keygen element.
        /// </summary>
        internal HTMLKeygenElement()
        {
            vstate = new ValidityState();
            _name = Tag;
        }

        #endregion

        #region Properties

        /// <summary>
        /// Gets or sets the value of the name attribute.
        /// </summary>
        public string Name
        {
            get { return GetAttribute("name"); }
            set { SetAttribute("name", value); }
        }

        /// <summary>
        /// Gets or sets the challenge attribute.
        /// </summary>
        public string Challenge
        {
            get { return GetAttribute("challenge"); }
            set { SetAttribute("challenge", value); }
        }

        /// <summary>
        /// Gets or sets the type of key used.
        /// </summary>
        public Encryption Keytype
        {
            get { return ToEnum(GetAttribute("keytype"), Encryption.RSA); }
            set { SetAttribute("keytype", value.ToString()); }
        }

        /// <summary>
        /// Gets or sets if the keygen control should have focus when the page loads.
        /// </summary>
        public bool Autofocus
        {
            get { return GetAttribute("autofocus") != null; }
            set { SetAttribute("autofocus", value ? string.Empty : null); }
        }

        /// <summary>
        /// Gets the type of input control (keygen).
        /// </summary>
        public string Type
        {
            get { return Tag; }
        }

        /// <summary>
        /// Gets the current validation message.
        /// </summary>
        public string ValidationMessage
        {
            get { return vstate.CustomError ? error : string.Empty; }
        }

        /// <summary>
        /// Gets the boolean value false since keygen elements do not validate.
        /// </summary>
        public bool WillValidate
        {
            get { return false; }
        }

        /// <summary>
        /// Gets the current validation state of the keygen element.
        /// </summary>
        public ValidityState Validity
        {
            get { return vstate; }
        }

        /// <summary>
        /// Gets the associated HTML form element.
        /// </summary>
        public HTMLFormElement Form
        {
            get { return GetAssignedForm(); }
        }

        /// <summary>
        /// Gets or sets if the element is enabled or disabled.
        /// </summary>
        public bool Disabled
        {
            get { return GetAttribute("disabled") != null; }
            set { SetAttribute("disabled", value ? string.Empty : null); }
        }

        #endregion

        #region Internal properties

        /// <summary>
        /// Gets if the node is in the special category.
        /// </summary>
        protected internal override bool IsSpecial
        {
            get { return true; }
        }

        #endregion

        #region Methods

        /// <summary>
        /// Checks the validity. This is always true since keygen elements are
        /// not candidites for constraint validation.
        /// </summary>
        /// <returns>True.</returns>
        public bool CheckValidity()
        {
            return true;
        }

        /// <summary>
        /// Sets a custom validation error. If this is not the empty string,
        /// then the element is suffering from a custom validation error.
        /// </summary>
        /// <param name="error"></param>
        public void SetCustomValidity(string error)
        {
            vstate.CustomError = !string.IsNullOrEmpty(error);
            this.error = error;
        }

        #endregion

        #region Enumeration

        /// <summary>
        /// An enumeration of possible keytype values.
        /// </summary>
        public enum Encryption : ushort
        {
            /// <summary>
            /// The RSA encryption.
            /// </summary>
            RSA
        }

        #endregion
    }
}

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License

This article, along with any associated source code and files, is licensed under The BSD License

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About the Author

Florian Rappl
Chief Technology Officer
Germany Germany
Florian is from Regensburg, Germany. He started his programming career with Perl. After programming C/C++ for some years he discovered his favorite programming language C#. He did work at Siemens as a programmer until he decided to study Physics. During his studies he worked as an IT consultant for various companies.
 
Florian is also giving lectures in C#, HTML5 with CSS3 and JavaScript, and other topics. Having graduated from University with a Master's degree in theoretical physics he is currently busy doing his PhD in the field of High Performance Computing.
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