SqlConnectionStringBuilder.cs :  » 2.6.4-mono-.net-core » System.Data » System » Data » SqlClient » C# / CSharp Open Source

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C# / CSharp Open Source » 2.6.4 mono .net core » System.Data 
System.Data » System » Data » SqlClient » SqlConnectionStringBuilder.cs
//
// System.Data.SqlClient.SqlConnectionStringBuilder.cs
//
// Author:
//   Sureshkumar T (tsureshkumar@novell.com)
//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

#if NET_2_0
using System;
using System.Text;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;

using System.Data;
using System.Data.Common;
using System.ComponentModel;

namespace System.Data.SqlClient{
  [DefaultPropertyAttribute ("DataSource")]
#if NET_2_0
  [TypeConverterAttribute ("System.Data.SqlClient.SqlConnectionStringBuilder+SqlConnectionStringBuilderConverter, " + Consts.AssemblySystem_Data)]
#endif
  public sealed class SqlConnectionStringBuilder : DbConnectionStringBuilder
  {

    private const string   DEF_APPLICATIONNAME     = ".NET SqlClient Data Provider";
    private const bool   DEF_ASYNCHRONOUSPROCESSING   = false;
    private const string   DEF_ATTACHDBFILENAME     = "";
    private const bool   DEF_CONNECTIONRESET     = true;
    private const int   DEF_CONNECTTIMEOUT     = 15;
    private const string   DEF_CURRENTLANGUAGE     = "";
    private const string   DEF_DATASOURCE       = "";
    private const bool   DEF_ENCRYPT       = false;
    private const bool   DEF_ENLIST       = false;
    private const string   DEF_FAILOVERPARTNER     = "";
    private const string   DEF_INITIALCATALOG     = "";
    private const bool   DEF_INTEGRATEDSECURITY     = false;
    private const int   DEF_LOADBALANCETIMEOUT     = 0;
    private const int   DEF_MAXPOOLSIZE     = 100;
    private const int   DEF_MINPOOLSIZE     = 0;
    private const bool   DEF_MULTIPLEACTIVERESULTSETS   = false;
    private const string   DEF_NETWORKLIBRARY     = "";
    private const int   DEF_PACKETSIZE       = 8000;
    private const string   DEF_PASSWORD       = "";
    private const bool   DEF_PERSISTSECURITYINFO    = false;
    private const bool   DEF_POOLING       = true;
    private const bool   DEF_REPLICATION     = false;
    private const string   DEF_USERID       = "";
    private const string   DEF_WORKSTATIONID     = "";
    private const string   DEF_TYPESYSTEMVERSION     = "Latest";
    private const bool  DEF_TRUSTSERVERCERTIFICATE  = false;
    private const bool  DEF_USERINSTANCE    = false;  
    private const bool  DEF_CONTEXTCONNECTION    = false;  
    private const string  DEF_TRANSACTIONBINDING    = "Implicit Unbind";


    #region // Fields
     private string   _applicationName;
    private bool   _asynchronousProcessing;
    private string   _attachDBFilename;
    private bool   _connectionReset;
    private int   _connectTimeout;
    private string   _currentLanguage;
    private string   _dataSource;
    private bool   _encrypt;
    private bool   _enlist;
    private string   _failoverPartner;
    private string   _initialCatalog;
    private bool   _integratedSecurity;
    private int   _loadBalanceTimeout;
    private int   _maxPoolSize;
    private int   _minPoolSize;
    private bool   _multipleActiveResultSets;
    private string   _networkLibrary;
    private int   _packetSize;
    private string   _password;
    private bool   _persistSecurityInfo;
    private bool   _pooling;
    private bool   _replication;
    private string   _userID;
    private string   _workstationID;
    private bool  _trustServerCertificate;
    private string  _typeSystemVersion;
    private bool  _userInstance;
    private bool  _contextConnection;
    private string  _transactionBinding;

    private static Dictionary <string, string> _keywords; // for mapping duplicate keywords
    private static Dictionary <string, object> _defaults; 
    #endregion // Fields

    #region Constructors
    public SqlConnectionStringBuilder () : this (String.Empty)
    {
    }

    public SqlConnectionStringBuilder (string connectionString)
    {
      Init ();
      base.ConnectionString = connectionString;
    }

    static SqlConnectionStringBuilder ()
    {
      _keywords = new Dictionary <string, string> ();
      _keywords ["APP"]       = "Application Name";
      _keywords ["APPLICATION NAME"]     = "Application Name";
      _keywords ["ATTACHDBFILENAME"]     = "AttachDbFilename";
      _keywords ["EXTENDED PROPERTIES"]   = "Extended Properties";
      _keywords ["INITIAL FILE NAME"]    = "Initial File Name";
      _keywords ["TIMEOUT"]       = "Connect Timeout";
      _keywords ["CONNECT TIMEOUT"]     = "Connect Timeout";
      _keywords ["CONNECTION TIMEOUT"]  = "Connect Timeout";
      _keywords ["CONNECTION RESET"]     = "Connection Reset";
      _keywords ["LANGUAGE"]       = "Current Language";
      _keywords ["CURRENT LANGUAGE"]     = "Current Language";
      _keywords ["DATA SOURCE"]     = "Data Source";
      _keywords ["SERVER"]       = "Data Source";
      _keywords ["ADDRESS"]       = "Data Source";
      _keywords ["ADDR"]       = "Data Source";
      _keywords ["NETWORK ADDRESS"]     = "Data Source";
      _keywords ["ENCRYPT"]       = "Encrypt";
      _keywords ["ENLIST"]       = "Enlist";
      _keywords ["INITIAL CATALOG"]     = "Initial Catalog";
      _keywords ["DATABASE"]       = "Initial Catalog";
      _keywords ["INTEGRATED SECURITY"]  = "Integrated Security";
      _keywords ["TRUSTED_CONNECTION"]   = "Integrated Security";
      _keywords ["MAX POOL SIZE"]     = "Max Pool Size";
      _keywords ["MIN POOL SIZE"]     = "Min Pool Size";
      _keywords ["MULTIPLEACTIVERESULTSETS"]   = "MultipleActiveResultSets";
      _keywords ["ASYNCHRONOUS PROCESSING"]   = "Asynchronous Processing";
      _keywords ["ASYNC"]       = "Async";
      _keywords ["NET"]       = "Network Library";
      _keywords ["NETWORK"]       = "Network Library";
      _keywords ["NETWORK LIBRARY"]     = "Network Library";
      _keywords ["PACKET SIZE"]     = "Packet Size";
      _keywords ["PASSWORD"]       = "Password";
      _keywords ["PWD"]       = "Password";
      _keywords ["PERSISTSECURITYINFO"]  = "Persist Security Info";
      _keywords ["PERSIST SECURITY INFO"]   = "Persist Security Info";
      _keywords ["POOLING"]       = "Pooling";
      _keywords ["UID"]       = "User ID";
      _keywords ["USER"]       = "User ID";
      _keywords ["USER ID"]       = "User ID";
      _keywords ["WSID"]       = "Workstation ID";
      _keywords ["WORKSTATION ID"]    = "Workstation ID";
      _keywords ["USER INSTANCE"]    = "User Instance";
      _keywords ["CONTEXT CONNECTION"]  = "Context Connection";
      _keywords ["TRANSACTION BINDING"]  = "Transaction Binding";
      _keywords ["FAILOVER PARTNER"]    = "Failover Partner";
      _keywords ["REPLICATION"]    = "Replication";
      _keywords ["TRUSTSERVERCERTIFICATE"]  = "TrustServerCertificate";
      _keywords ["LOAD BALANCE TIMEOUT"]  = "Load Balance Timeout";
      _keywords ["TYPE SYSTEM VERSION"]  = "Type System Version";

      _defaults = new Dictionary<string, object> ();
      _defaults.Add("Data Source", DEF_DATASOURCE);
      _defaults.Add("Failover Partner", DEF_FAILOVERPARTNER);
      _defaults.Add("AttachDbFilename", DEF_ATTACHDBFILENAME);
      _defaults.Add("Initial Catalog", DEF_INITIALCATALOG);
      _defaults.Add("Integrated Security", DEF_INTEGRATEDSECURITY);
      _defaults.Add("Persist Security Info", DEF_PERSISTSECURITYINFO);
      _defaults.Add("User ID", DEF_USERID);
      _defaults.Add("Password", DEF_PASSWORD);
      _defaults.Add("Enlist", DEF_ENLIST);
      _defaults.Add("Pooling", DEF_POOLING);
      _defaults.Add("Min Pool Size", DEF_MINPOOLSIZE);
      _defaults.Add("Max Pool Size", DEF_MAXPOOLSIZE);
      _defaults.Add("Asynchronous Processing", DEF_ASYNCHRONOUSPROCESSING);
      _defaults.Add("Connection Reset", DEF_CONNECTIONRESET);
      _defaults.Add("MultipleActiveResultSets", DEF_MULTIPLEACTIVERESULTSETS);
      _defaults.Add("Replication", DEF_REPLICATION);
      _defaults.Add("Connect Timeout", DEF_CONNECTTIMEOUT);
      _defaults.Add("Encrypt", DEF_ENCRYPT);
      _defaults.Add("TrustServerCertificate", DEF_TRUSTSERVERCERTIFICATE);
      _defaults.Add("Load Balance Timeout", DEF_LOADBALANCETIMEOUT);
      _defaults.Add("Network Library", DEF_NETWORKLIBRARY);
      _defaults.Add("Packet Size", DEF_PACKETSIZE);
      _defaults.Add("Type System Version", DEF_TYPESYSTEMVERSION);
      _defaults.Add("Application Name", DEF_APPLICATIONNAME);
      _defaults.Add("Current Language", DEF_CURRENTLANGUAGE);
      _defaults.Add("Workstation ID", DEF_WORKSTATIONID);
      _defaults.Add("User Instance", DEF_USERINSTANCE);
      _defaults.Add("Context Connection", DEF_CONTEXTCONNECTION);
      _defaults.Add("Transaction Binding", DEF_TRANSACTIONBINDING);      
    }
    #endregion // Constructors

    #region Properties
    [DisplayNameAttribute ("Application Name")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public string ApplicationName { 
      get { return _applicationName; }
      set { 
        base ["Application Name"] = value;
        _applicationName = value; 
      }
    }

    [DisplayNameAttribute ("Asynchronous Processing")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public bool AsynchronousProcessing { 
      get { return _asynchronousProcessing; }
      set { 
        base ["Asynchronous Processing"] = value;
        _asynchronousProcessing = value; 
      }
    }

#if NET_2_0
    [Editor ("System.Windows.Forms.Design.FileNameEditor, " + Consts.AssemblySystem_Design,
       "System.Drawing.Design.UITypeEditor, " + Consts.AssemblySystem_Drawing)]
#else
    [Editor ("Microsoft.VSDesigner.Data.Design.DBParametersEditor, " + Consts.AssemblyMicrosoft_VSDesigner,
       "System.Drawing.Design.UITypeEditor, " + Consts.AssemblySystem_Drawing)]
#endif
    [DisplayNameAttribute ("AttachDbFilename")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public string AttachDBFilename { 
      get { return _attachDBFilename; }
      set { 
        base ["AttachDbFilename"] = value;
        _attachDBFilename = value; 
      }
    }
    
    [DisplayNameAttribute ("Connection Reset")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public bool ConnectionReset { 
      get { return _connectionReset; }
      set { 
        base ["Connection Reset"] = value;
        _connectionReset = value; 
      }
    }
    
    [DisplayNameAttribute ("Connect Timeout")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public int ConnectTimeout { 
      get { return _connectTimeout; }
      set { 
        base ["Connect Timeout"] = value;
        _connectTimeout = value; 
      }
    }

    [DisplayNameAttribute ("Current Language")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public string CurrentLanguage { 
      get { return _currentLanguage; }
      set { 
        base ["Current Language"] = value;
        _currentLanguage = value; 
      }
    }

    [DisplayNameAttribute ("Data Source")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
#if NET_2_0
    [TypeConverterAttribute ("System.Data.SqlClient.SqlConnectionStringBuilder+SqlDataSourceConverter, " + Consts.AssemblySystem_Data)]
#endif
    public string DataSource { 
      get { return _dataSource; }
      set { 
        base ["Data Source"] = value;
        _dataSource = value; 
      }
    }

    [DisplayNameAttribute ("Encrypt")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public bool Encrypt { 
      get { return _encrypt; }
      set { 
        base ["Encrypt"] = value;
        _encrypt = value; 
      }
    }

    [DisplayNameAttribute ("Enlist")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public bool Enlist { 
      get { return _enlist; }
      set { 
        base ["Enlist"] = value;
        _enlist = value; 
      }
    }

    [DisplayNameAttribute ("Failover Partner")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
#if NET_2_0
    [TypeConverterAttribute ("System.Data.SqlClient.SqlConnectionStringBuilder+SqlDataSourceConverter, " + Consts.AssemblySystem_Data)]
#endif
    public string FailoverPartner { 
      get { return _failoverPartner; }
      set { 
        base ["Failover Partner"] = value;
        _failoverPartner = value; 
      }
    }

    [DisplayNameAttribute ("Initial Catalog")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
#if NET_2_0
    [TypeConverterAttribute ("System.Data.SqlClient.SqlConnectionStringBuilder+SqlInitialCatalogConverter, " + Consts.AssemblySystem_Data)]
#endif
    public string InitialCatalog { 
      get { return _initialCatalog; }
      set { 
        base ["Initial Catalog"] = value;
        _initialCatalog = value; 
      }
    }

    [DisplayNameAttribute ("Integrated Security")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public bool IntegratedSecurity { 
      get { return _integratedSecurity; }
      set { 
        base ["Integrated Security"] = value;
        _integratedSecurity = value; 
      }
    }

    public override bool IsFixedSize { 
      get { return true; }
    }

    public override object this [string keyword] { 
      get { 
        string mapped = MapKeyword (keyword);
        if (base.ContainsKey (mapped)) 
          return base [mapped];
        else
          return _defaults [mapped];
      }
      set {SetValue (keyword, value);}
    }

    public override ICollection Keys { 
      get { 
        List<string> keys = new List<string>();
                                keys.Add("Data Source");
                                keys.Add("Failover Partner");
                                keys.Add("AttachDbFilename");
                                keys.Add("Initial Catalog");
                                keys.Add("Integrated Security");
                                keys.Add("Persist Security Info");
                                keys.Add("User ID");
                                keys.Add("Password");
                                keys.Add("Enlist");
                                keys.Add("Pooling");
                                keys.Add("Min Pool Size");
                                keys.Add("Max Pool Size");
                                keys.Add("Asynchronous Processing");
                                keys.Add("Connection Reset");
                                keys.Add("MultipleActiveResultSets");
                                keys.Add("Replication");
                                keys.Add("Connect Timeout");
                                keys.Add("Encrypt");
                                keys.Add("TrustServerCertificate");
                                keys.Add("Load Balance Timeout");
                                keys.Add("Network Library");
                                keys.Add("Packet Size");
                                keys.Add("Type System Version");
                                keys.Add("Application Name");
                                keys.Add("Current Language");
                                keys.Add("Workstation ID");
                                keys.Add("User Instance");
                                keys.Add("Context Connection");
                                keys.Add("Transaction Binding");
        ReadOnlyCollection<string> coll = new ReadOnlyCollection<string>(keys);
        return coll;
      }
    }

    [DisplayNameAttribute ("Load Balance Timeout")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public int LoadBalanceTimeout { 
      get { return _loadBalanceTimeout; }
      set { 
        base ["Load Balance Timeout"] = value;
        _loadBalanceTimeout = value; 
      }
    }

    [DisplayNameAttribute ("Max Pool Size")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public int MaxPoolSize { 
      get { return _maxPoolSize; }
      set { 
        base ["Max Pool Size"] = value;
        _maxPoolSize = value; 
      }
    }

    [DisplayNameAttribute ("Min Pool Size")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public int MinPoolSize { 
      get { return _minPoolSize; }
      set {
        base ["Min Pool Size"] = value;
        _minPoolSize = value; 
      }
    }

    [DisplayNameAttribute ("MultipleActiveResultSets")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public bool MultipleActiveResultSets { 
      get { return _multipleActiveResultSets; }
      set { 
        base ["Multiple Active Resultsets"] = value;
        _multipleActiveResultSets = value; 
      }
    }

    [DisplayNameAttribute ("Network Library")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
#if NET_2_0
    [TypeConverterAttribute ("System.Data.SqlClient.SqlConnectionStringBuilder+NetworkLibraryConverter, " + Consts.AssemblySystem_Data)]
#endif
    public string NetworkLibrary { 
      get { return _networkLibrary; }
      set { 
        base ["Network Library"] = value;
        _networkLibrary = value; 
      }
    }

    [DisplayNameAttribute ("Packet Size")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public int PacketSize { 
      get { return _packetSize; }
      set { 
        base ["Packet Size"] = value;
        _packetSize = value; 
      }
    }

    [DisplayNameAttribute ("Password")]
    [PasswordPropertyTextAttribute (true)]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public string Password { 
      get { return _password; }
      set { 
        base ["Password"] = value;
        _password = value; 
      }
    }

    [DisplayNameAttribute ("Persist Security Info")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public bool PersistSecurityInfo { 
      get { return _persistSecurityInfo; }
      set {
        base ["Persist Security Info"] = value;
        _persistSecurityInfo = value; 
      }
    }
    
    [DisplayNameAttribute ("Pooling")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public bool Pooling { 
      get { return _pooling; }
      set {
        base ["Pooling"] = value;
        _pooling = value; 
      }
    }

    [DisplayNameAttribute ("Replication")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public bool Replication { 
      get { return _replication; }
      set { 
        base ["Replication"] = value;
        _replication = value; 
      }
    }

    [DisplayNameAttribute ("User ID")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public string UserID { 
      get { return _userID; }
      set { 
        base ["User Id"]= value;
        _userID = value; 
      }
    }
    
    public override ICollection Values { 
      get {
        List<object> values = new List<object>();
                                values.Add(_dataSource);
                                values.Add(_failoverPartner);
                                values.Add(_attachDBFilename);
                                values.Add(_initialCatalog);
                                values.Add(_integratedSecurity);
                                values.Add(_persistSecurityInfo);
                                values.Add(_userID);
                                values.Add(_password);
                                values.Add(_enlist);
                                values.Add(_pooling);
                                values.Add(_minPoolSize);
                                values.Add(_maxPoolSize);
                                values.Add(_asynchronousProcessing);
                                values.Add(_connectionReset);
                                values.Add(_multipleActiveResultSets);
                                values.Add(_replication);
                                values.Add(_connectTimeout);
                                values.Add(_encrypt);
                                values.Add(_trustServerCertificate);
                                values.Add(_loadBalanceTimeout);
                                values.Add(_networkLibrary);
                                values.Add(_packetSize);
                                values.Add(_typeSystemVersion);
                                values.Add(_applicationName);
                                values.Add(_currentLanguage);
                                values.Add(_workstationID);
                                values.Add(_userInstance);
                                values.Add(_contextConnection);
                                values.Add(_transactionBinding);
        ReadOnlyCollection<object> coll = new ReadOnlyCollection<object>(values);
        return coll;     
      }
    }

    [DisplayNameAttribute ("Workstation ID")]
    [RefreshPropertiesAttribute (RefreshProperties.All)]
    public string WorkstationID { 
      get { return _workstationID; }
      set { 
        base ["Workstation Id"] = value;
        _workstationID = value; 
      }
    }

    [DisplayNameAttribute ("TrustServerCertificate")]
    [RefreshProperties (RefreshProperties.All)]
    public bool TrustServerCertificate { 
      get { return _trustServerCertificate; } 
      set {
        base ["Trust Server Certificate"] = value;
         _trustServerCertificate = value;
      }
    }

    [DisplayNameAttribute ("Type System Version")]
    [RefreshProperties (RefreshProperties.All)]
    public string TypeSystemVersion { 
      get { return _typeSystemVersion; } 
      set {
        base ["Type System Version"] = value;        
        _typeSystemVersion = value; 
      }
    }

    [DisplayNameAttribute ("User Instance")]
    [RefreshProperties (RefreshProperties.All)]
    public bool UserInstance { 
      get { return _userInstance; }
      set { 
        base ["User Instance"] = value;
        _userInstance = value;
      }
    }

    [RefreshPropertiesAttribute (RefreshProperties.All)]
    [DisplayNameAttribute ("Context Connection")]
    public bool ContextConnection { 
      get { return _contextConnection; }
      set { 
        base ["Context Connection"] = value;
        _contextConnection = value;
      }
    }
    #endregion // Properties

    #region Methods
    private void Init ()
    {
      _applicationName   = DEF_APPLICATIONNAME;
      _asynchronousProcessing  = DEF_ASYNCHRONOUSPROCESSING;
      _attachDBFilename  = DEF_ATTACHDBFILENAME;
      _connectionReset  = DEF_CONNECTIONRESET;
      _connectTimeout    = DEF_CONNECTTIMEOUT;
      _currentLanguage  = DEF_CURRENTLANGUAGE;
      _dataSource    = DEF_DATASOURCE;
      _encrypt    = DEF_ENCRYPT;
      _enlist      = DEF_ENLIST;
      _failoverPartner  = DEF_FAILOVERPARTNER;
      _initialCatalog    = DEF_INITIALCATALOG;
      _integratedSecurity  = DEF_INTEGRATEDSECURITY;
      _loadBalanceTimeout  = DEF_LOADBALANCETIMEOUT;
      _maxPoolSize    = DEF_MAXPOOLSIZE;
      _minPoolSize    = DEF_MINPOOLSIZE;
      _multipleActiveResultSets= DEF_MULTIPLEACTIVERESULTSETS;
      _networkLibrary    = DEF_NETWORKLIBRARY;
      _packetSize    = DEF_PACKETSIZE;
      _password    = DEF_PASSWORD;
      _persistSecurityInfo  = DEF_PERSISTSECURITYINFO;
      _pooling    = DEF_POOLING;
      _replication    = DEF_REPLICATION;
      _userID      = DEF_USERID;
      _workstationID    = DEF_WORKSTATIONID;
      _trustServerCertificate  = DEF_TRUSTSERVERCERTIFICATE;
      _typeSystemVersion  = DEF_TYPESYSTEMVERSION;
      _userInstance    = DEF_USERINSTANCE;
      _contextConnection  = DEF_CONTEXTCONNECTION;
      _transactionBinding  = DEF_TRANSACTIONBINDING;
    }

    public override void Clear ()
    {
      base.Clear ();
      Init ();
    }

    public override bool ContainsKey (string keyword)
    {
      keyword = keyword.ToUpper ().Trim ();
      if (_keywords.ContainsKey (keyword))
        return base.ContainsKey (_keywords [keyword]);
      return false;
    }

    public override bool Remove (string keyword)
    {
      if (!ContainsKey (keyword))
        return false;
      this [keyword] = null;
      return true;
    }

    [MonoNotSupported ("")] // Note that base.ShouldSerialize() is called but not implemented
    public override bool ShouldSerialize (string keyword)
    {
      if (!ContainsKey (keyword))
        return false;
      keyword = keyword.ToUpper ().Trim ();
      // Assuming passwords cannot be serialized.
      if (_keywords [keyword] == "Password")
        return false;
      return base.ShouldSerialize (_keywords [keyword]);
    }

    public override bool TryGetValue (string keyword, out object value)
    {
      if (! ContainsKey (keyword)) {
        value = String.Empty;
        return false;
      }
      return base.TryGetValue (_keywords [keyword.ToUpper ().Trim ()], out value);
    }

    #endregion // Methods

    #region Private Methods
    private string MapKeyword (string keyword)
    {
      keyword = keyword.ToUpper ().Trim ();
      if (! _keywords.ContainsKey (keyword))
        throw new ArgumentException("Keyword not supported :" + keyword);
      return _keywords [keyword];
    }
    
    private void SetValue (string key, object value)
    {
      if (key == null)
        throw new ArgumentNullException ("key cannot be null!");

      string mappedKey = MapKeyword (key);

      switch (mappedKey.ToUpper ().Trim ()) {
      case "APPLICATION NAME" :
        if (value == null) {
          _applicationName = DEF_APPLICATIONNAME;
          base.Remove (mappedKey);
        } else
          this.ApplicationName = value.ToString ();
        break;
      case "ATTACHDBFILENAME" :
        throw new NotImplementedException ("Attachable database support is " +
                   "not implemented.");
      case "CONNECT TIMEOUT" :
        if (value == null) {
          _connectTimeout = DEF_CONNECTTIMEOUT;
          base.Remove (mappedKey);
        } else 
          this.ConnectTimeout = DbConnectionStringBuilderHelper.ConvertToInt32 (value);
        break;
      case "CONNECTION LIFETIME" :
        break;
      case "CONNECTION RESET" :
        if (value == null) {
          _connectionReset = DEF_CONNECTIONRESET;
          base.Remove (mappedKey);
        } else 
          this.ConnectionReset = DbConnectionStringBuilderHelper.ConvertToBoolean (value);
        break;
      case "CURRENT LANGUAGE" :
        if (value == null) {
          _currentLanguage = DEF_CURRENTLANGUAGE;
          base.Remove (mappedKey);
        } else 
          this.CurrentLanguage = value.ToString ();
        break;
      case "CONTEXT CONNECTION" :
        if (value == null) {
          _contextConnection = DEF_CONTEXTCONNECTION;
          base.Remove (mappedKey);
        } else
          this.ContextConnection = DbConnectionStringBuilderHelper.ConvertToBoolean (value);
        break;
      case "DATA SOURCE" :
        if (value == null) {
          _dataSource = DEF_DATASOURCE;
          base.Remove (mappedKey);
        } else 
          this.DataSource = value.ToString ();
        break;
      case "ENCRYPT":
        if (value == null) {
          _encrypt = DEF_ENCRYPT;
          base.Remove (mappedKey);
        }else if (DbConnectionStringBuilderHelper.ConvertToBoolean(value))
          throw new NotImplementedException("SSL encryption for"
                    + " data sent between client and server is not"
                    + " implemented.");
        break;
      case "ENLIST" :
        if (value == null) {
          _enlist = DEF_ENLIST;
          base.Remove (mappedKey);
        } else if ( ! DbConnectionStringBuilderHelper.ConvertToBoolean(value))
          throw new NotImplementedException("Disabling the automatic"
                    + " enlistment of connections in the thread's current"
                    + " transaction context is not implemented.");
        break;
      case "INITIAL CATALOG" :
        if (value == null) {
          _initialCatalog = DEF_INITIALCATALOG;
          base.Remove (mappedKey);
        } else 
          this.InitialCatalog = value.ToString ();
        break;
      case "INTEGRATED SECURITY" :
        if (value == null) {
          _integratedSecurity = DEF_INTEGRATEDSECURITY;
          base.Remove (mappedKey);
        } else 
          this.IntegratedSecurity = DbConnectionStringBuilderHelper.ConvertToBoolean (value);
        break;
      case "MAX POOL SIZE" :
        if (value == null) {
          _maxPoolSize = DEF_MAXPOOLSIZE;
          base.Remove (mappedKey);
        } else 
          this.MaxPoolSize = DbConnectionStringBuilderHelper.ConvertToInt32 (value);
        break;
      case "MIN POOL SIZE" :
        if (value == null) {
          _minPoolSize = DEF_MINPOOLSIZE;
          base.Remove (mappedKey);
        } else 
          this.MinPoolSize = DbConnectionStringBuilderHelper.ConvertToInt32 (value);
        break;
      case "MULTIPLEACTIVERESULTSETS":
        if (value == null) {
          _multipleActiveResultSets = DEF_MULTIPLEACTIVERESULTSETS;
          base.Remove (mappedKey);
        } else if ( DbConnectionStringBuilderHelper.ConvertToBoolean (value))
          throw new NotImplementedException ("MARS is not yet implemented!");
        break;
      case "ASYNCHRONOUS PROCESSING" :
        if (value == null) {
          _asynchronousProcessing = DEF_ASYNCHRONOUSPROCESSING;
          base.Remove (mappedKey);
        } else 
          this.AsynchronousProcessing = DbConnectionStringBuilderHelper.ConvertToBoolean (value);
        break;
      case "NETWORK LIBRARY" :
        if (value == null) {
          _networkLibrary = DEF_NETWORKLIBRARY;
          base.Remove (mappedKey);
        } else {
          if (!value.ToString ().ToUpper ().Equals ("DBMSSOCN"))
            throw new ArgumentException ("Unsupported network library.");
          this.NetworkLibrary = value.ToString ().ToLower ();
        }
        break;
      case "LOAD BALANCE TIMEOUT":
        // TODO: what is this?
        break;
      case "PACKET SIZE" :
        if (value == null) {
          _packetSize = DEF_PACKETSIZE;
          base.Remove (mappedKey);
        } else 
          this.PacketSize = DbConnectionStringBuilderHelper.ConvertToInt32 (value);
        break;
      case "PASSWORD" :
        if (value == null) {
          _password = DEF_PASSWORD;
          base.Remove (mappedKey);
        } else 
          this.Password = value.ToString ();
        break;
      case "PERSIST SECURITY INFO" :
        if (value == null) {
          _persistSecurityInfo = DEF_PERSISTSECURITYINFO;
          base.Remove (mappedKey);
        } else if (DbConnectionStringBuilderHelper.ConvertToBoolean (value))
          throw new NotImplementedException ("Persisting security info" +
                     " is not yet implemented");
        break;
      case "POOLING" :
        if (value == null) {
          _pooling = DEF_POOLING;
          base.Remove (mappedKey);
        } else 
          this.Pooling = DbConnectionStringBuilderHelper.ConvertToBoolean (value);
        break;
      case "USER ID" :
        if (value == null) {
          _userID = DEF_USERID;
          base.Remove (mappedKey);
        } else 
          this.UserID = value.ToString ();
        break;
      case "USER INSTANCE" :
        if (value == null) {
          _userInstance = DEF_USERINSTANCE;
          base.Remove (mappedKey);
        } else
          this.UserInstance = DbConnectionStringBuilderHelper.ConvertToBoolean (value);
        break;
      case "WORKSTATION ID" :
        if (value == null) {
          _workstationID = DEF_WORKSTATIONID;
          base.Remove (mappedKey);
        } else 
          this.WorkstationID = value.ToString ();
        break;
      case "TRANSACTION BINDING":
        // TODO: what is this?
        break;
      default :
        throw new ArgumentException("Keyword not supported :" + key);
      }
    }
    #endregion // Private Methods
  }
 
  
}
#endif // NET_2_0
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