string NowDate = System.DateTime.Now.ToString("dd.MM.yyyy") + "(+0)$";
            string DTomorowate = System.DateTime.Now.AddDays(1).ToString("dd.MM.yyyy") + "(+0)$";

            OleDbConnection objConn = null;
            System.Data.DataTable dt = null;
 
            String connString = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source=" + comboBoxInp2.Text + ";Extended Properties=Excel 8.0;"; 
            objConn = new OleDbConnection(connString);
            objConn.Open();
            dt = objConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);

            String[] excelSheets = new String[dt.Rows.Count];
            int i = 0;
                        
            foreach (DataRow row in dt.Rows)
             {
              excelSheets[i] = row["TABLE_NAME"].ToString();
              i++;
             }

            OleDbCommand cm = null;
            cm = new OleDbCommand("select * from [" +NowDate+ "] ", objConn);
            OleDbDataAdapter da = new OleDbDataAdapter();

            da.SelectCommand = cm;
            DataTable _table = new DataTable();
            da.Fill(_table);
            da.Dispose();
            cm.Dispose();


            MessageBox.Show( Convert.ToString (_table.Rows.Count));

cm = new OleDbCommand("select * from [11.05.2010 (+0)$] WHERE [Название передачи] Like '%Региональное окно%'", objConn);

cm = new OleDbCommand("select * from [11.05.2010 (+0)$] WHERE [Название передачи] Like @name", objConn);
cm.Parameters.AddWithValue("@name", "Региональное окно%");

foreach (DataRow row in dt.Rows)
{
    excelSheets[i] = "[" + row["TABLE_NAME"].ToString() + "]" ;
    i++;
}

OleDbCommand cm = null;          
cm = new OleDbCommand();
cm.Connection = objConn;
cm.CommandText = @"SELECT * FROM " + excelSheets[0];     
OleDbDataAdapter da = new OleDbDataAdapter ();

da.SelectCommand = cm;