public static void WriteTo(Sheet sheet, string targetDir)
{
string filePath = $"{targetDir}/{sheet.Name}.ndb";
byte[] fieldBytes = GetFieldBytes(sheet.Fields, out int dataSize);
byte[] strBytes = GetStringBytes(sheet, out Dictionary <string, int> strOffsetDic);
byte[] arrayBytes = GetArrayBytes(sheet, strOffsetDic, out Dictionary <string, int> arrayOffsetDic);
byte[] dataBytes = GetDataBytes(sheet, strOffsetDic, arrayOffsetDic);
NDBHeader header = new NDBHeader();
header.version = 1;
header.dataCount = sheet.LineCount;
header.fieldCount = sheet.FieldCount;
header.dataSize = dataSize;
header.dataOffset = NDBHeader.Size + fieldBytes.Length;
header.stringOffset = header.dataOffset + dataBytes.Length;
header.arrayOffset = header.stringOffset + strBytes.Length;
byte[] headerBytes = NDBConst.StructToByte(header, NDBHeader.Size);
using (FileStream fs = new FileStream(filePath, FileMode.Create, FileAccess.Write, FileShare.None))
{
fs.Write(headerBytes, 0, headerBytes.Length);
fs.Write(fieldBytes, 0, fieldBytes.Length);
fs.Write(dataBytes, 0, dataBytes.Length);
fs.Write(strBytes, 0, strBytes.Length);
fs.Write(arrayBytes, 0, arrayBytes.Length);
fs.Flush();
}
}
private static byte[] GetFieldBytes(List <Field> fields, out int dataSize)
{
dataSize = 0;
MemoryStream stream = new MemoryStream();
foreach (var field in fields)
{
NDBFieldType ndbFieldType = GetNDBFieldType(field);
dataSize += NDBConst.GetFieldSize(ndbFieldType);
string fieldNameValue = field.Name;
byte[] fieldTypeBytes = BitConverter.GetBytes((int)ndbFieldType);
byte[] fieldNameBytes = Encoding.UTF8.GetBytes(fieldNameValue);
byte[] fieldNameLenBytes = BitConverter.GetBytes(fieldNameBytes.Length);
stream.Write(fieldTypeBytes, 0, fieldTypeBytes.Length);
stream.Write(fieldNameLenBytes, 0, fieldNameLenBytes.Length);
stream.Write(fieldNameBytes, 0, fieldNameBytes.Length);
}
return(stream.ToArray());
}