请问各位：System.Data.OleDb.OleDbException: 不能更新。数据库或对象为只读。是？？？？？

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string strConn;
strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+"c:\\Book1.xsl"+";"+"Extended Properties=Excel 8.0;";
OleDbConnection Conn = new OleDbConnection(strConn);
OleDbDataAdapter sqlDA = new OleDbDataAdapter();
OleDbCommand Comm = new OleDbCommand("SELECT * FROM [Sheet1$]", Conn);
sqlDA.SelectCommand = Comm;
DataSet myDataSet = new DataSet();
sqlDA.Fill(myDataSet, "ExcelInfo");运行到此处提示如上。