Error: “Could Not Find Installable ISAM”

Place single quotes around the Extended Properties:

OleDbConnection oconn = 
    new OleDbConnection(
        @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path + ";Extended Properties='Excel 8.0;HDR=YES;IMEX=1;';");

Try it, it really works.

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Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)