string s = "c:\\test.xls";
System.IO.FileStream str = new System.IO.FileStream(s, IO.FileMode.Open, IO.FileAccess.ReadWrite);
FarPoint.Excel.ExcelWorkbookType en;
en = FarPoint.Excel.ExcelWorkbookType.BIFF;
bool b = fpSpread1.IsExcelStream(str, ref en);
if (b)
{
fpSpread1.OpenExcel(str);
}
Dim s As String = "c:\test.xls"
Dim str As New System.IO.FileStream(s, IO.FileMode.Open, IO.FileAccess.ReadWrite)
Dim b As Boolean = FpSpread1.IsExcelStream(str, FarPoint.Excel.ExcelWorkbookType.BIFF)
If b Then
FpSpread1.OpenExcel(str)
End If