C # use Excel to import and export data

// Import Excel , returns a dataset

Public dataset inputexcel (string path)
{
String strconn = "provider = Microsoft. Jet. oledb.4.0;" + "Data Source =" + path + ";" + "extended properties = Excel 8.0 ;";
Oledbconnection conn = new oledbconnection (strconn );
Conn. open ();
String strexcel = "";
Oledbdataadapter mycommand = NULL;
Dataset DS = NULL;
Strexcel = "select * from [sheet1 $]";
Mycommand = new oledbdataadapter (strexcel, strconn );
DS = new dataset ();
Mycommand. Fill (DS, "Table1 ");
Return Ds;
}

// Export Excel Document
Public bool outputexcel (string path)
{
Try
{
String strconn = "provider = Microsoft. Jet. oledb.4.0;" + "Data Source =" + path + ";" + "extended properties = Excel 8.0 ;";
Oledbconnection conn = new oledbconnection (strconn );
Conn. open ();
System. Data. oledb. oledbcommand cmd = new oledbcommand ();
Cmd. Connection = conn;
// Cmd. commandtext = "Update [sheet1 $] Set Name = '1970-01-01 'Where Employee ID =' Date '";
// Cmd. executenonquery ();
For (INT I = 0; I <fp2.sheets [0]. rowcount-1; I ++)
{
If (fp2.sheets [0]. cells [I, 0]. Text! = "")
{
Cmd. commandtext = "insert into [sheet1 $] ( Employee ID , Name , Department , Title , Date , Time ) Values ('"+ fp2.sheets [0]. cells [I, 0]. Text +"', '"+
Fp2.sheets [0]. cells [I, 1]. text + "','" + fp2.sheets [0]. cells [I, 2]. text + "','" + fp2.sheets [0]. cells [I, 3]. text +
"','" + Fp2.sheets [0]. cells [I, 4]. text + "','" + fp2.sheets [0]. cells [I, 5]. text + "')";
Cmd. executenonquery ();
}
}
Conn. Close ();
Return true;
}
Catch (system. Data. oledb. oledbexception ex)
{
System. Diagnostics. Debug. writeline (" Write Excel Error: "+ Ex. Message );
}
Return false;
}