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WPF Control Factory

, 20 Apr 2010 CPOL
This article explains some advantages and disadvantages of factories, and shows one to use for generating WPF Controls.
WpfControlsAndSample
Pfz.ClassLibraries
Pfz
Caching
Collections
DataTypes
Extensions
Pfz.snk
Properties
Ranges
Threading
Pfz.WpfControls
BoundGridParts
Extensions
Pfz.WpfControls.snk
Properties
TypeConverters
WpfControlFactorySample
bin
Debug
Pfz.dll
Pfz.WpfControls.dll
WpfControlFactorySample.exe
Properties
WpfControlFactorySample.suo
using System;
using System.Windows.Controls;
using Pfz.DataTypes;

namespace Pfz.WpfControls
{
	/// <summary>
	/// Control used to get passwords with confirmation.
	/// </summary>
	public class PasswordControl:
		UserControl,
		IValueControl,
		IValueContainer<PasswordString>
	{
		private PasswordBox fPassword1;
		private PasswordBox fPassword2;
		
		/// <summary>
		/// Creates a new password control.
		/// </summary>
		public PasswordControl()
		{
			fPassword1 = new PasswordBox();
			fPassword2 = new PasswordBox();
		
			var stackPanel = new StackPanel();
			stackPanel.Children.Add(fPassword1);
			stackPanel.Children.Add(fPassword2);
			Content = stackPanel;
		}

		/// <summary>
		/// Clears both password boxes.
		/// </summary>
		public void Clear()
		{
			fPassword1.Clear();
			fPassword2.Clear();
		}

		/// <summary>
		/// Gets or sets a value telling that this control is read-only.
		/// </summary>
		public bool IsReadOnly
		{
			get
			{
				return !IsEnabled;
			}
			set
			{
				IsEnabled = !value;
			}
		}
		
		/// <summary>
		/// Gets or sets the password of the password boxes.
		/// Note that an exception is thrown if the values are different.
		/// </summary>
		public string Value
		{
			get
			{
				string text = fPassword1.Password;
				if (text != fPassword2.Password)
					throw new ApplicationException("Password and confirmation must match!");
					
				if (text == "")
					return null;
				
				return text;
			}
			set
			{
				fPassword1.Password = value;
				fPassword2.Password = value;
			}
		}

		#region IValueContainer<PasswordString> Members
			PasswordString IValueContainer<PasswordString>.Value
			{
				get
				{
					return new PasswordString(Value);
				}
				set
				{
					Value = value.ToString();
				}
			}
		#endregion
		#region IValueContainer Members
			object IValueContainer.Value
			{
				get
				{
					return new PasswordString(Value);
				}
				set
				{
					PasswordString str = (PasswordString)value;
					Value = str.ToString();
				}
			}
		#endregion
	}
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Paulo Zemek
Engineer Microsoft Corporation
United States United States
I started to program computers when I was 11 years old, as a hobbyist, programming in AMOS Basic and Blitz Basic for Amiga.
At 12 I had my first try with assembler, but it was too difficult at the time. Then, in the same year, I learned C and, after learning C, I was finally able to learn assembler (for Motorola 680x0).
Not sure, but probably between 12 and 13, I started to learn C++. I always programmed "in an object oriented way", but using function pointers instead of virtual methods.

At 15 I started to learn Pascal at school and to use Delphi. At 16 I started my first internship (using Delphi). At 18 I started to work professionally using C++ and since then I've developed my programming skills as a professional developer in C++ and C#, generally creating libraries that help other developers do their work easier, faster and with less errors.

Now I just started working as a Senior Software Engineer at Microsoft.

Want more info or simply want to contact me?
Take a look at: http://paulozemek.azurewebsites.net/
Or e-mail me at: paulozemek@outlook.com

Codeproject MVP 2012, 2015 & 2016
Microsoft MVP 2013-2014 (now I work at Microsoft so I can't be a Microsoft MVP anymore)

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