UserPreference.cs source code in C# .NET

                        Code:
                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / infocard / Service / managed / Microsoft / InfoCards / UserPreference.cs / 1 / UserPreference.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------
namespace Microsoft.InfoCards
{ 
    using System;
    using System.IO; 
    using System.Collections.Generic; 
    using System.Text;
    using System.Globalization; //CultureInfo 

    using Microsoft.InfoCards.Diagnostics;
    using IDT = Microsoft.InfoCards.Diagnostics.InfoCardTrace;
 
    //
    // Summary: 
    //   User prefrences for the infocard system 
    //
    internal class UserPreference 
    {

        const byte  Version             = 1;
        const byte  Marker             = 29; 
        const string Id  = "urn:microsoft.com:infocards:user_prefs";
 
        const int    s_ATApplicationsDisabled = 0; 

        int          m_ATApplicationsFlags;  // Application flags. 
        bool         m_showClaimsFlag;   // If the claim list should be expanded in UI

        public UserPreference()
        { 

        } 
 
        //
        // Summary 
        //  Serialize the user preferences
        //
        // Parameters
        //  stream - Stream to serialize data from. 
        //
        public UserPreference( Stream stream ) 
        { 
            Deserialize( stream );
        } 

        //
        // Summary
        //  Serialize the user preferences 
        //
        // Parameters 
        //  stream - Memory stream to serialize data to. 
        //
        public void Serialize( System.IO.Stream stream ) 
        {

            //
            // Setup a BinaryWriter to serialize the bytes of each member to the provided stream 
            //
            System.IO.BinaryWriter writer = new BinaryWriter( stream , Encoding.Unicode ); 
            // 
            // Write each member to binary stream
            // 
            writer.Write( Version );
            writer.Write( (Int32) m_ATApplicationsFlags );
            writer.Write( m_showClaimsFlag );
            writer.Write( Marker ); 
        }
 
 
        //
        // Summary 
        //  Deserialize the user preferences
        //
        // Parameters
        //  stream - Memory stream containing serialized data. 
        //
        public void Deserialize( System.IO.Stream stream ) 
        { 
            //
            // Populate each member from the stream 
            //
            BinaryReader reader = new InfoCardBinaryReader( stream, Encoding.Unicode );
            //
            // Check the version 
            //
            if( Version != reader.ReadByte() ) 
            { 
                IDT.Assert( false, "Incorrect version found in stream deserialization" );
            } 

            //
            // Read each property from the stream
            // 
            m_ATApplicationsFlags = reader.ReadInt32();
            m_showClaimsFlag  = reader.ReadBoolean(); 
 
            //
            // Validate the end of the buffer 
            //
            if( Marker != reader.ReadByte() )
            {
                IDT.Assert( false, "malformed stream detected" ); 
            }
        } 
 

        // 
        // Summary
        //  Save the user preferences to the store
        //
        // Parameters 
        //  con - connection to the store
        // 
        public void Save( StoreConnection con ) 
        {
            IDT.TraceDebug( "Saving UserPreferences..." ); 
            IDT.TraceDebug( ToString() );

            //
            // Write the user preferences object to the store 
            //
 
            DataRow row = con.GetSingleRow( 
                                            new QueryParameter( SecondaryIndexDefinition.ObjectTypeIndex,
                                                                (Int32)StorableObjectType.UserPreferences ), 
                                            new QueryParameter( SecondaryIndexDefinition.GlobalIdIndex,
                                                                GlobalId.DeriveFrom( Id ) ) );

            if( null == row ) 
            {
                row = new DataRow(); 
                row.ObjectType = (Int32) StorableObjectType.UserPreferences; 
                row.GlobalId = GlobalId.DeriveFrom( Id );
            } 


            //
            // Populate the data object 
            //
            MemoryStream ms = new MemoryStream(); 
 
            Serialize( ms );
            row.SetDataField( ms.ToArray() ); 

            //
            // Save the row to the database
            // 
            con.Save( row );
        } 
 
        //
        // Summary 
        //  Constructs a string with the state of the receiver.
        //
        // Returns
        //  String showing the state of the object 
        //
        public override string ToString() 
        { 
            StringBuilder sb = new StringBuilder();
            sb.AppendFormat( "Background Color:\t{0}\n", m_ATApplicationsFlags.ToString( CultureInfo.InvariantCulture ) ); 
            sb.AppendFormat( "List expansion flag:\t{0}\n", m_showClaimsFlag.ToString()  );

            return sb.ToString();
        } 

        // 
        // Summary 
        //  Retrieve the user preferences from the store.
        //  There should never be more than one of these so just return the first one. 
        //
        // Parameters
        //  con - connection to the store
        // 
        // Returns
        //  User preference object with the users preferences. 
        //  Null is returned if the object is not found in the store. 
        //
        public static UserPreference Get( StoreConnection con ) 
        {

            List paramList = new List();
            QueryParameter query = new QueryParameter( SecondaryIndexDefinition.ObjectTypeIndex, 
                                                      (Int32) StorableObjectType.UserPreferences );
            paramList.Add( query ); 
 
            DataRow row = con.GetSingleRow( paramList.ToArray() );
 
            if( null != row )
            {
                UserPreference userPref;
 
                MemoryStream ms = new MemoryStream( row.GetDataField() );
 
                userPref = new UserPreference( ms ); 

                return userPref; 
            }
            else
            {
                return null; 
            }
        } 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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UserPreference.cs source code in C# .NET

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