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Building an embedded database engine in C#

By , 10 Jun 2009
 
Prize winner in Competition "Best C# article of June 2009"
using System;
using System.Collections.Generic;
using System.Text;

namespace DbfDotNet.Core
{
    [Record(FieldMapping = FieldMapping.ExplicitColumnsOnly, Width = 32)]
    internal class DbfHeader
    {
        [Column(Type = ColumnType.BYTE)]
        public byte VerNumber;

        [Column(Type = ColumnType.DATE_YMD)]
        public DateTime LastUpdate;

        [Column(Type = ColumnType.UINT32)]
        public UInt32 NbRecords;

        [Column(Type = ColumnType.UINT16)]
        public UInt16 HeaderWidth;

        [Column(Type = ColumnType.UINT16)]
        public UInt16 RecordWidth;

        [Column(Type = ColumnType.INT16)]
        public Int16 Zero;

        [Column(Type = ColumnType.BYTE)]
        public byte IncompleteTransaction;

        [Column(Type = ColumnType.BYTE)]
        public byte EncryptionFlag;

        [Column(Type = ColumnType.DELAYED, Width = 12)]
        public byte[] LanOnly;

        [Column(Type = ColumnType.BYTE)]
        public byte Indexed;
        // MdxFlag

        [Column(Type = ColumnType.BYTE)]
        public byte Language;

        [Column(Type = ColumnType.INT16)]
        public Int16 Zero2;

        public void Clear()
        {
            VerNumber = 0;
            LastUpdate = DateTime.MinValue;
            NbRecords = 0;
            HeaderWidth = 0;
            RecordWidth = 0;
            Zero = 0;
            IncompleteTransaction = 0;
            EncryptionFlag = 0;
            LanOnly = new byte[] { };
            Indexed = 0;
            Language = 0;
            Zero2 = 0;
        }
    }

}

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

Pascal Ganaye
Software Developer (Senior)
United Kingdom United Kingdom
Member
I am a French programmer.
These days I spend most of my time with the .NET framework, JavaScript and html.

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