private void CreateBDF()
{
_dbfPointer = ShapeLib.DBFCreate(_filename);
if (_dbfPointer == IntPtr.Zero)
{
string file = System.IO.Path.ChangeExtension((System.IO.Path.GetFullPath(_filename)), ".dbf");
throw new Exception("Could not create " + file + ". Is the file opened in another program?");
}
int DigitsBeforePoint, DigitsAfterPoint;
int[] Precision = new int[2];
//Make the dbf file one attribute at the time
for (int j = 0; j < _rows[0].Table.Columns.Count; j++)
{
//double -attribute
if (_rows[0].Table.Columns[j].DataType == typeof(double))
{
DigitsBeforePoint = 0;
DigitsAfterPoint = 0;
bool AllNulls = true;
//Loop to find precision
for (int i = 0; i < _rows.Count; i++)
{
//Don't try if no data
if (_rows[i][j] != DBNull.Value)
{
AllNulls = false;
Precision = GetPrecision((float)(double)_rows[i][j]);
DigitsBeforePoint = Math.Max(Precision[0], DigitsBeforePoint);
DigitsAfterPoint = Math.Max(Precision[1], DigitsAfterPoint);
}
}
//Set default precision
if (AllNulls)
{
DigitsAfterPoint = 5;
DigitsBeforePoint = 7;
}
ShapeLib.DBFAddField(_dbfPointer, _rows[0].Table.Columns[j].Caption, ShapeLib.DBFFieldType.FTDouble, DigitsBeforePoint + DigitsAfterPoint + 1, DigitsAfterPoint);
}
//String attribute
else if (_rows[0].Table.Columns[j].DataType == typeof(string))
{
int width = 10;
//Loop to find cell width.
for (int i = 0; i < _rows.Count; i++)
{
width = Math.Max(width, (_rows[i][j]).ToString().Length);
}
ShapeLib.DBFAddField(_dbfPointer, _rows[0].Table.Columns[j].Caption, ShapeLib.DBFFieldType.FTString, width, 0);
}
//int attribute
else if (_rows[0].Table.Columns[j].DataType == typeof(int))
{
int width = 5;
for (int i = 0; i < _rows.Count; i++)
{
//Loop to find precision
//Don't try if no data
if (_rows[i][j] != DBNull.Value)
{
width = Math.Max(width, GetPrecision((int)_rows[i][j]));
}
}
ShapeLib.DBFAddField(_dbfPointer, _rows[0].Table.Columns[j].Caption, ShapeLib.DBFFieldType.FTInteger, width, 0);
}
else if (_rows[0].Table.Columns[j].DataType == typeof(bool))
{
ShapeLib.DBFAddField(_dbfPointer, _rows[0].Table.Columns[j].Caption, ShapeLib.DBFFieldType.FTLogical, 1, 0);
}
else if (_rows[0].Table.Columns[j].DataType == typeof(DateTime))
{
ShapeLib.DBFAddField(_dbfPointer, _rows[0].Table.Columns[j].Caption, ShapeLib.DBFFieldType.FTDate, 8, 0);
}
}
}
