The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine

问题

Can someone help me with this error? When I try to open a connection to an mdb, I get "The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine" error. How can I correct this?

My code is pretty simple:

class ImportTDB {
    private string filename;
    private string connectionString;

    private int collisions = 0;

    public ImportTDB(String filename) {
        this.filename = filename;
        this.connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filename;
    }

    public void loadCustomerList() {
        DataTable dt = new DataTable();
        using (OleDbConnection conn = new OleDbConnection(connectionString)) {
            OleDbDataAdapter adapter = new OleDbDataAdapter("SELECT * FROM Names", conn);
            conn.Open();
            adapter.Fill(dt);
            conn.Close();
        }

        Console.WriteLine(dt.ToString());
    }
}

回答1:

That's because there is no Jet driver for 64-bit systems and I suppose you are trying to run this on a x64 bit OS. You need to compile your program to target x86. In the project properties, Build tab, set Platform target to x86.

回答2:

If you are running your application in a 64 bit OS, Microsoft has now released the 2010 Office System Driver Beta: Data Connectivity Components which is supported both in 32 bit as well as 64 bit OS. So using this driver instead of the traditional Microsoft.Jet.OLEDB.4.0 driver will give us a 64 bit application running on a 64 bit server (that is what we really need).

Though this is in beta, it worked fine for me.

You can download this driver from 2010 Office System Driver Beta: Data Connectivity Components

Thnks

来源：https://stackoverflow.com/questions/1735392/the-microsoft-jet-oledb-4-0-provider-is-not-registered-on-the-local-machine

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