/// <summary>
/// This appends the content of one datarow to a dBase file.
/// </summary>
/// <exception cref="ArgumentNullException">The columnValues parameter was null</exception>
/// <exception cref="InvalidOperationException">Header records need to be written first.</exception>
/// <exception cref="InvalidDataException">Table property of columnValues parameter cannot be null.</exception>
public void WriteTable()
{
if (_dataTable == null) return;
// _writer.Write((byte)0x20); // the deleted flag
NumberConverter[] ncs = new NumberConverter[_columns.Count];
for (int i = 0; i < _columns.Count; i++)
{
Field fld = _columns[i];
ncs[i] = new NumberConverter(fld.Length, fld.DecimalCount);
}
for (int row = 0; row < _dataTable.Rows.Count; row++)
{
_writer.Write((byte) 0x20); // the deleted flag
int len = _recordLength - 1;
for (int fld = 0; fld < _columns.Count; fld++)
{
string name = _columns[fld].ColumnName;
object columnValue = _dataTable.Rows[row][name];
if (columnValue == null || columnValue is DBNull)
WriteSpaces(_columns[fld].Length);
else if (columnValue is decimal)
_writer.Write(ncs[fld].ToChar((decimal) columnValue));
else if (columnValue is double)
{
//Write((double)columnValue, _columns[fld].Length, _columns[fld].DecimalCount);
char[] test = ncs[fld].ToChar((double) columnValue);
_writer.Write(test);
}
else if (columnValue is float)
{
//Write((float)columnValue, _columns[fld].Length, _columns[fld].DecimalCount);
Field currentField = _columns[fld];
if (currentField.TypeCharacter == 'F')
{
string val = ((float) columnValue).ToString();
Write(val, currentField.Length);
}
else
{
char[] test = ncs[fld].ToChar((float) columnValue);
_writer.Write(test);
}
}
else if (columnValue is int || columnValue is short || columnValue is long || columnValue is byte)
Write(Convert.ToInt64(columnValue), _columns[fld].Length, _columns[fld].DecimalCount);
else if (columnValue is bool)
Write((bool) columnValue);
else if (columnValue is string)
{
int length = _columns[fld].Length;
Write((string) columnValue, length);
}
else if (columnValue is DateTime)
WriteDate((DateTime) columnValue);
else
Write((string) columnValue, _columns[fld].Length);
len -= _columns[fld].Length;
}
// If, for some reason the column lengths don't add up to the total record length, fill with spaces.
if (len > 0) WriteSpaces(len);
}
}
/// <summary>
/// saves a single row to the data source.
/// </summary>
/// <param name="index">the integer row (or FID) index</param>
/// <param name="values">The object array holding the new values to store.</param>
public virtual void Edit(int index, DataRow values)
{
int rawRow = GetFileIndex(index);
NumberConverter[] ncs = new NumberConverter[_columns.Count];
for (int i = 0; i < _columns.Count; i++)
{
Field fld = _columns[i];
ncs[i] = new NumberConverter(fld.Length, fld.DecimalCount);
}
//overridden in sub-classes
FileStream myStream = new FileStream(_filename, FileMode.Open, FileAccess.Write, FileShare.Write, 100000);
_writer = new BinaryWriter(myStream);
myStream.Seek(_headerLength + _recordLength * rawRow, SeekOrigin.Begin);
_writer.Write((byte)0x20); // the deleted flag
int len = _recordLength - 1;
for (int fld = 0; fld < _columns.Count; fld++)
{
string name = _columns[fld].ColumnName;
object columnValue = values[name];
if (columnValue == null || columnValue is DBNull)
WriteSpaces(_columns[fld].Length);
else if (columnValue is decimal)
_writer.Write(ncs[fld].ToChar((decimal)columnValue));
else if (columnValue is double)
{
//Write((double)columnValue, _columns[fld].Length, _columns[fld].DecimalCount);
char[] test = ncs[fld].ToChar((double)columnValue);
_writer.Write(test);
}
else if (columnValue is float)
{
//Write((float)columnValue, _columns[fld].Length, _columns[fld].DecimalCount);
Field currentField = _columns[fld];
if (currentField.TypeCharacter == 'F')
{
string val = ((float)columnValue).ToString();
Write(val, currentField.Length);
}
else
{
char[] test = ncs[fld].ToChar((float)columnValue);
_writer.Write(test);
}
}
else if (columnValue is int || columnValue is short || columnValue is long || columnValue is byte)
Write(Convert.ToInt64(columnValue), _columns[fld].Length, _columns[fld].DecimalCount);
else if (columnValue is bool)
Write((bool)columnValue);
else if (columnValue is string)
{
int length = _columns[fld].Length;
Write((string)columnValue, length);
}
else if (columnValue is DateTime)
WriteDate((DateTime)columnValue);
else
Write((string)columnValue, _columns[fld].Length);
len -= _columns[fld].Length;
}
// If, for some reason the column lengths don't add up to the total record length, fill with spaces.
if (len > 0) WriteSpaces(len);
_writer.Flush();
_writer.Close();
}
