读取DBF文件的部分代码

private void BtnOpenInitial_Click(object sender, EventArgs e)
{
OpenFileDialog file = new OpenFileDialog();
if (file.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
string path = file.FileName;
DTable dbf  = new DTable();
dbf.Load(path);
if (dbf.Table.Rows.Count > 0)
{
this.GrcInitialData.DataSource = dbf.Table;
_table = new DataTable();
_table = dbf.Table;
}
}
}

/// <summary>
/// 从硬盘读取dbf文件
/// </summary>
/// <param name="filepath">路径</param>
/// <returns></returns>
public int Load(String filepath)
{
FileInfo FFile = new FileInfo(filepath);
if (FFile.Exists)
{
Stream fStream = new BufferedStream(new FileStream(filepath,

FileMode.Open));//main.dbf
try
{
BinaryReader bReader = new BinaryReader(fStream);
//ByteDump(fStream);
return ReadDBF(bReader);
}
catch
{
ClearDataTable();
return -1;
}
finally
{
fStream.Close();
}
}
else
{
return -1;
}
}

/// <summary>
/// 读取dbf
/// </summary>
/// <param name="bReader"></param>
/// <returns></returns>
private int ReadDBF(BinaryReader bReader)
{
if (ReadHeader(bReader) == 0)
{
if (ReadFieldDesc(bReader) == 0)
{
return readRecord(bReader);
}
else
return -1;
}
else
{
return -1;
}
}

/// <summary>
/// 读取记录
/// </summary>
/// <param name="bReader"></param>
/// <returns></returns>
private int readRecord(BinaryReader bReader)
{
try
{
int iRecCount = _hearder.RecordCount;
for (int i = 0; i < iRecCount; i++)
{
DRow row = new DRow();
DataRow datarow = _table.NewRow();
row.RowIndex = i;

byte bRecordFlag = bReader.ReadByte();

if (bRecordFlag == 0x20)
{
row.DeleteFlag = false;
}
else if (bRecordFlag == 0x2a)
{
row.DeleteFlag = true;
}
else
{
ClearDataTable();
return -1;
}

for (short j = 0; j < _columns.ColumnCount; j++)
{
DColumn col = _columns.GetColumnByIndex(j);
if (col != null)
{

DField field = new DField();
field.Column = col;
byte[] bValue = bReader.ReadBytes(col.ColumnLength);
field.FieldValue = Encoding.Default.GetString(bValue);
row.AddField(field);
UpdateRowField(datarow, field);
}
else
{
return -1;
}
}
_rows.AddRow(row);
if (!row.DeleteFlag)
_table.Rows.Add(datarow);
}

//if (_hearder.RecordCount > 0)
//{
//    byte endflag = bReader.ReadByte();
//    if (endflag != 0x1A)
//    {
//        ClearDataTable();
//        return -1;
//    }
//}
return 0;
}
catch
{
ClearDataTable();
return -1;
}
}