Add a list of items into the dictionary. : DictionaryBase « Collections Data Structure « C# / C Sharp

1. C# / C Sharp
2. Collections Data Structure
3. DictionaryBase

Add a list of items into the dictionary.

  

#region License and Copyright
/* -------------------------------------------------------------------------
 * Dotnet Commons Collections
 *
 *
 * This library is free software; you can redistribute it and/or modify it 
 * under the terms of the GNU Lesser General Public License as published by 
 * the Free Software Foundation; either version 2.1 of the License, or 
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but 
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License 
 * for more details. 
 *
 * You should have received a copy of the GNU Lesser General Public License 
 * along with this library; if not, write to the 
 * 
 * Free Software Foundation, Inc., 
 * 59 Temple Place, 
 * Suite 330, 
 * Boston, 
 * MA 02111-1307 
 * USA 
 * 
 * -------------------------------------------------------------------------
 */
#endregion

using System;
using System.Collections;
using System.Text;


namespace Dotnet.Commons.Collections
{

  ///  
  /// <summary>  
  /// 
  /// This utility class extends the operations for manipulating 
  /// Dictionary collections.
  ///
  ///
  /// </summary>  
  /// 
  public class DictionaryUtils
  {
    private DictionaryUtils()
    {      
    }

    /// <summary>
    /// Add a list of items into the dictionary. 
    /// 
    /// </summary>
    /// <param name="list">List that contains items that are to be added to the dictionary</param>
    /// <param name="dictionary">dictionary to be added with items from list</param>
    /// <param name="propertyNameKey">Name of property to be use as key</param>
    public static void AddToDictionary(IList list, 
                      ref IDictionary dictionary,
                      string propertyNameKey)
    {
      foreach (object obj in list)
      {

        //Generate a key for the object

        object objKey = null;

        if (propertyNameKey != null)
        {
                    object propertyValue = obj.GetType().GetProperty(propertyNameKey);

          // only Property value as key if not null
          if (propertyValue != null)
            objKey = propertyValue;          
        }        
        
        if (objKey == null)
        {        
          objKey = obj.GetType().FullName + "@" + obj.GetHashCode().ToString();          
        }


        // if a similar object already exists, simply replace it. Otherwise add
        // to the dictionary

        if (dictionary[objKey] != null)
          dictionary[objKey] = obj;          
        else
          dictionary.Add(objKey, obj);
      }
    }

    }
}

   
    
  

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