public DBFFile(string filename)
{
try
{
FileInfo fi = new FileInfo(filename);
if (!fi.Exists)
{
return;
}
_filename = filename;
StreamReader sr = new StreamReader(filename);
BinaryReader br = new BinaryReader(sr.BaseStream);
_header = new DBFFileHader(br);
_fields = new List <FieldDescriptor>();
for (int i = 0; i < _header.FieldsCount; i++)
{
FieldDescriptor field = new FieldDescriptor(br);
_fields.Add(field);
}
sr.Close();
int c = 1;
string idFieldName = _idField;
while (HasField(idFieldName))
{
idFieldName = _idField + "_" + c++;
}
_idField = idFieldName;
_encoder = null;
try
{
switch ((CodePage)_header.LanguageDriver)
{
case CodePage.DOS_USA:
_encoder = EncodingFromCodePage(437);
break;
case CodePage.DOS_Multilingual:
_encoder = EncodingFromCodePage(850);
break;
case CodePage.Windows_ANSI:
_encoder = EncodingFromCodePage(1252);
break;
case CodePage.EE_MS_DOS:
_encoder = EncodingFromCodePage(852);
break;
case CodePage.Nordic_MS_DOS:
_encoder = EncodingFromCodePage(865);
break;
case CodePage.Russian_MS_DOS:
_encoder = EncodingFromCodePage(866);
break;
case CodePage.Windows_EE:
_encoder = EncodingFromCodePage(1250);
break;
case CodePage.UTF_7:
_encoder = new UTF7Encoding();
break;
}
}
catch { }
if (_encoder == null)
{
FileInfo encFi = new FileInfo(fi.Directory.FullName + @"\dbf_default_encoding.txt");
if (encFi.Exists)
{
using (StreamReader encSr = new StreamReader(encFi.FullName))
{
switch (encSr.ReadLine().ToLower())
{
case "utf8":
case "utf-8":
_encoder = new UTF8Encoding();
break;
case "unicode":
_encoder = new UnicodeEncoding();
break;
case "ascii":
_encoder = new ASCIIEncoding();
break;
}
}
}
if (_encoder == null)
{
_encoder = new UTF7Encoding();
}
}
//Record(0);
//Record(1);
}
catch
{
}
}
public static bool Write(BinaryWriter bw, Fields fields)
{
if (bw == null || fields == null)
{
return(false);
}
int c = 0, rl = 1; // deleted Flag
foreach (IField field in fields.ToEnumerable())
{
switch (field.type)
{
case FieldType.biginteger:
c++; rl += 18;
break;
case FieldType.boolean:
c++; rl += 1;
break;
case FieldType.character:
c++; rl += 1;
break;
case FieldType.Date:
c++; rl += 8;
break;
case FieldType.Double:
c++; rl += 31;
break;
case FieldType.Float:
c++; rl += 11;
break;
case FieldType.ID:
c++; rl += 9;
break;
case FieldType.integer:
c++; rl += 9;
break;
case FieldType.Shape:
break;
case FieldType.smallinteger:
c++; rl += 6;
break;
case FieldType.String:
c++; rl += (field.size > 255) ? 255 : field.size;
break;
default:
c++; rl += (field.size <= 0) ? 255 : field.size;
break;
}
}
short hLength = (short)(32 * c + 33);
bw.Write((byte)3); // Version
bw.Write((byte)106); // YY
bw.Write((byte)6); // MM
bw.Write((byte)12); // DD
bw.Write((int)0); // recordCount
bw.Write(hLength); // headerLength
bw.Write((short)rl); // Length of each record
bw.Write((short)0); // Reserved1
bw.Write((byte)0); // IncompleteTransac
bw.Write((byte)0); // EncryptionFlag
bw.Write((int)0); // FreeRecordThread
bw.Write((int)0); // Reserved2
bw.Write((int)0); // Reserved3
bw.Write((byte)0); // MDX
bw.Write((byte)CodePage.DOS_Multilingual); // LanguageDriver Codepage 850
bw.Write((short)0); // Reserved4
foreach (IField field in fields.ToEnumerable())
{
FieldDescriptor.Write(bw, field);
}
bw.Write((byte)13); // Terminator 0x0D
return(true);
}
