using System . Data . OleDb;
OleDbConnection vOleDbConnection = new OleDbConnection ();
vOleDbConnection . ConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;" +
@"Data Source=c:\temp\temp.xls;Extended Properties=Excel 8.0;" ;
vOleDbConnection . Open();
OleDbCommand vOleDbCommand = new OleDbCommand (
"select * from [Sheet1$A1:A10]" , vOleDbConnection);
OleDbDataReader vOleDbDataReader = vOleDbCommand . ExecuteReader();
while (vOleDbDataReader . Read())
textBox1 . AppendText(vOleDbDataReader . GetValue( 0 ) . ToString() + "\r\n" );