Click here to Skip to main content
Click here to Skip to main content
Articles » Web Development » ASP.NET » Data » Downloads
 
Add your own
alternative version

ASP.NET Optimistic Concurrency Control

, 19 Aug 2003
How to implement the optimistic concurrency control without the DataSet
Concurrency_Control_src.zip
Concurrency
BLL
Concurrency.csproj.webinfo
Concurrency.vsdisco
Global.asax
Images
spacer.gif
Thumbs.db
SQLHelper
Stored Procedures
_vti_cnf
_vti_pvt
access.cnf
deptodoc.btr
doctodep.btr
service.cnf
service.lck
services.cnf
_vti_script
_vti_txt
using System;
using System.Reflection;
using System.Collections;

namespace Concurrency.BLL
{
	/// <summary>
	/// Represents an object difference
	/// </summary>
	public class ObjectDifference
	{

		#region Constructors

		/// <summary>
		/// Initializes a new instance of the object difference class
		/// </summary>
		public ObjectDifference()
		{
		}

		/// <summary>
		/// Initializes a new instance of the object difference class
		/// </summary>
		/// <param name="propertyName">Property name</param>
		/// <param name="firstValue">Property value for the first object</param>
		/// <param name="secondObject">Property value for the second object</param>
		public ObjectDifference(string propertyName, object firstValue, object secondValue)
		{
			_propertyName = propertyName;
			_firstValue = firstValue;
			_secondValue = secondValue;
		}

		#endregion

		#region Methods

		/// <summary>
		/// Gets the differences between two objects
		/// </summary>
		/// <param name="firstObject">First object to compare</param>
		/// <param name="secondObject">Second object to compare</param>
		/// <returns>IList containing the differences. The objects on the IList are of ObjectDifference type</returns>
		public static IList GetDifferences(object firstObject, object secondObject)
		{
			Type firstType = firstObject.GetType();
			Type secondType = secondObject.GetType();
			object firstValue;
			object secondValue;
			ArrayList differences = new ArrayList();

			// Both objects must be of the same type
			if (firstType != secondType)
				throw new Exception("The objects type must be the same.");

			foreach (PropertyInfo property in firstType.GetProperties())
			{
				// Get the value for each object
				firstValue = property.GetValue(firstObject, null);
				secondValue = property.GetValue(secondObject, null);

				// Compate the values. If they are different, add to the collection
				if (!firstValue.Equals(secondValue))
					differences.Add( new ObjectDifference(property.Name, firstValue, secondValue) );
			}

			return differences;
		}

		#endregion

		#region Properties

		private string _propertyName;
		private object _firstValue;
		private object _secondValue;

		public string PropertyName
		{
			get { return _propertyName; }
			set { _propertyName = value; }
		}

		public object FirstValue
		{
			get { return _firstValue; }
			set { _firstValue = value; }
		}

		public object SecondValue
		{
			get { return _secondValue; }
			set { _secondValue = value; }
		}

		#endregion

	}
}

By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.

If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

Share

About the Author

Teo
Web Developer
United States United States
No Biography provided

| Advertise | Privacy | Terms of Use | Mobile
Web02 | 2.8.141223.1 | Last Updated 20 Aug 2003
Article Copyright 2003 by Teo
Everything else Copyright © CodeProject, 1999-2014
Layout: fixed | fluid