Please what's wrong here???

Hi!

 Please there's something wrong into this sql query??? I use a MS access data base with a column  "company" as text data type and "year" as text data type. I need to know if there is something wrong wrinting cote.

 

string connectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\LunaVisa\Visa\Visa\App_Data\visa.mdb;Persist Security Info=False";

OleDbConnection sqlCon = new OleDbConnection(connectionString);

sqlCon.Open();

string commandString = "select top 1 * from Bill where company ='" + company.Text + "' and year =" + txtYear.Text + " order by billNumber desc"; //the bugs message is : 

OleDbCommand sqlCmd = new OleDbCommand(commandString, sqlCon);

OleDbDataReader read = sqlCmd.ExecuteReader();

if (read.HasRows)

{

while (read.Read())

{

txtResFactN.Text = read["numfactura"].ToString(); // it will show your friend's name

//txtMention21.Text = read["codempresa"].ToString(); // it will show your friend's name

}

}

else

{

MessageBox.Show("A ultima numeração " + cbxEmpresa.Text + " não foi encontrada");

}

read.Close();

sqlCon.Close();