Different amount of read lines depending on whether file is open or closed with OleDbDataReader and OLEDB.12

Reading the same Excel file with OleDbDataReader and the following connectionString:
conn.ConnectionString =
"Data Source='" + xlsxFile +
"';Provider=Microsoft.ACE.OLEDB.12.0;Extended Properties='Excel 12.0;HDR=YES;IMEX=1'";
I would like to start reading Excel file at line X, I skip X-1 first lines and:
If file is closed, first row I get is the X+1 line.
Instead, if file is open, with exactly the same source code, I get Xth line!
I’m working with .net 2.0, Visual Studio 2008 and Microsoft Office Standard 2010.
Do you have any clue? Thank you in advance!
Mary

Hi mary4wpf,
I tested the code, and shown the excel data, it works well. the showing method is like below.
if (datareader.HasRows)
while (datareader.Read())
if (skipLine)
for (int j = 1; j < startIndex; j++)
datareader.Read();
skipLine = false;
string L0="";
string L1 = "";
if (datareader.IsDBNull(0))
L0 = "";
else
L0 = datareader.GetString(0);
if (datareader.IsDBNull(1))
L1 = "";
else
L1 = datareader.GetString(1);
Console.WriteLine("{0}\t{1}", L0,L1);
else
Console.WriteLine("No rows found.");
datareader.Close();
If you have something weird, could you please share the weird with us? we could help you better.
Regards,
Youjun Tang
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[Using Oracle UTL_FILE, UTL_SMTP packages and Linux Shell Scripting and Cron utility together|http://kamranagayev.wordpress.com/2009/02/23/using-oracle-utl_file-utl_smtp-packages-and-linux-shell-scripting-and-cron-utility-together-2/]
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Different amount of read lines depending on whether file is open or closed with OleDbDataReader and OLEDB.12

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