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using System;
using System.Collections;
namespace LumiSoft.Net.Mime
{
/// <summary>
/// Header field parameters collection.
/// </summary>
public class HeaderFieldParameterCollection : IEnumerable
{
private ParametizedHeaderField m_pHeaderField = null;
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="headerField">Header field.</param>
internal HeaderFieldParameterCollection(ParametizedHeaderField headerField)
{
m_pHeaderField = headerField;
}
#region method Add
/// <summary>
/// Adds a new header field parameter with specified name and value to the end of the collection.
/// </summary>
/// <param name="parameterName">Parameter name.</param>
/// <param name="parameterValue">Parameter value.</param>
public void Add(string parameterName,string parameterValue)
{
parameterName = parameterName.ToLower();
Hashtable parameters = m_pHeaderField.ParseParameters();
if(!parameters.ContainsKey(parameterName)){
parameters.Add(parameterName,parameterValue);
m_pHeaderField.StoreParameters(m_pHeaderField.Value,parameters);
}
else{
throw new Exception("Header field '" + m_pHeaderField.Name + "' parameter '" + parameterName + "' already exists !");
}
}
#endregion
#region method Remove
/// <summary>
/// Removes specified header field parameter from the collection.
/// </summary>
/// <param name="parameterName">The name of the header field parameter to remove.</param>
public void Remove(string parameterName)
{
parameterName = parameterName.ToLower();
Hashtable parameters = m_pHeaderField.ParseParameters();
if(!parameters.ContainsKey(parameterName)){
parameters.Remove(parameterName);
m_pHeaderField.StoreParameters(m_pHeaderField.Value,parameters);
}
}
#endregion
#region method Clear
/// <summary>
/// Clears the collection of all header field parameters.
/// </summary>
public void Clear()
{
Hashtable parameters = m_pHeaderField.ParseParameters();
parameters.Clear();
m_pHeaderField.StoreParameters(m_pHeaderField.Value,parameters);
}
#endregion
#region method Contains
/// <summary>
/// Gets if collection contains specified parameter.
/// </summary>
/// <param name="parameterName">Parameter name.</param>
/// <returns></returns>
public bool Contains(string parameterName)
{
parameterName = parameterName.ToLower();
Hashtable parameters = m_pHeaderField.ParseParameters();
return parameters.ContainsKey(parameterName);
}
#endregion
#region interface IEnumerator
/// <summary>
/// Gets enumerator.
/// </summary>
/// <returns></returns>
public IEnumerator GetEnumerator()
{
Hashtable parameters = m_pHeaderField.ParseParameters();
HeaderFieldParameter[] retVal = new HeaderFieldParameter[parameters.Count];
int i = 0;
foreach(DictionaryEntry entry in parameters){
retVal[i] = new HeaderFieldParameter(entry.Key.ToString(),entry.Value.ToString());
i++;
}
return retVal.GetEnumerator();
}
#endregion
#region Properties Implementation
/// <summary>
/// Gets or sets specified parameter value.
/// </summary>
public string this[string parameterName]
{
get{
parameterName = parameterName.ToLower();
Hashtable parameters = m_pHeaderField.ParseParameters();
if(!parameters.ContainsKey(parameterName)){
throw new Exception("Specified parameter '" + parameterName + "' doesn't exist !");
}
else{
return (string)parameters[parameterName];
}
}
set{
parameterName = parameterName.ToLower();
Hashtable parameters = m_pHeaderField.ParseParameters();
if(parameters.ContainsKey(parameterName)){
parameters[parameterName] = value;
m_pHeaderField.StoreParameters(m_pHeaderField.Value,parameters);
}
}
}
/// <summary>
/// Gets header field parameters count in the collection.
/// </summary>
public int Count
{
get{ return m_pHeaderField.ParseParameters().Count; }
}
#endregion
}
}
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