Read excel spreadsheet into a datatable

I am using the below C# code in my program to read excel 97 - 2003 spreadsheet data into a datatable using oledbconnection and ran into the name does not exist in the current context.

DataTable rs = null;

string path = Path.GetFullPath(filePath);
odConnection = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties='Excel 12.0;HDR=YES;IMEX=1;';");
odConnection.Open();
OleDbCommand cmd = new OleDbCommand(); ;
OleDbDataAdapter oleda = new OleDbDataAdapter();
DataSet ds = new DataSet();
DataTable dt = odConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
string sheetName = string.Empty;
if (dt != null)
{
    sheetName = dt.Rows[0]["Sheet_Name"].ToString();
}

cmd.Connection = odConnection;
cmd.CommandType = CommandType.Text;
cmd.CommandText = "SELECT * FROM [" + sheetName + "]";
oda = new OleDbDataAdapter(cmd);
oda.Fill(ds, "excelData");
rs = ds.Tables["excelData"];