.NET Connection to dBase .dbf file

问题

I'm trying to read a dBase III .dbf file using .NET and Winforms and nothing I've tried seem to work. I tried four different connection methods and every one of them hangs on Open method. No exceptions, no timeouts, no event messages, nothing. The form just sits there. Any ideas about what could be wrong?

Here's the methods I've tried. The .dbf file is at d:\db:

private void read1()
        {
            string c = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=d:\\db\\;Extended Properties=dBASE III";
            OleDbConnection conn = new OleDbConnection(c);
            conn.Open();
            MessageBox.Show("ok");
            conn.Close();

        }

        private void read2()
        {
            System.Data.Odbc.OdbcConnection oConn = new System.Data.Odbc.OdbcConnection();
            oConn.ConnectionString = @"Driver={Microsoft dBase Driver (*.dbf)};SourceType=DBF;SourceDB=D:\db;Exclusive=No; Collate=Machine;NULL=NO;DELETED=NO;BACKGROUNDFETCH=NO;";
            oConn.Open();
            System.Data.Odbc.OdbcCommand oCmd = oConn.CreateCommand();
            oCmd.CommandText = @"SELECT * FROM D:\db\Poi.dbf";
            DataTable dt = new DataTable();
            dt.Load(oCmd.ExecuteReader());
            MessageBox.Show(dt.Rows.Count.ToString());
            oConn.Close();
        }

        private void read3()
        {
            System.Data.Odbc.OdbcConnection oConn = new System.Data.Odbc.OdbcConnection();
            oConn.ConnectionString = @"Driver={Microsoft dBASE Driver (*.dbf)};DriverID=277;Dbq=d:\db;";
            oConn.Open();
            MessageBox.Show("ok");
            oConn.Close();
        }

        private void read4()
        {
            System.Data.Odbc.OdbcConnection oConn = new System.Data.Odbc.OdbcConnection();
            oConn.ConnectionString = @"Driver={Microsoft dBase Driver (*.dbf)};datasource=d:\db\";
            oConn.Open();
            System.Data.Odbc.OdbcCommand oCmd = oConn.CreateCommand();
            oCmd.CommandText = @"SELECT * FROM D:\db\Poi.dbf";
            DataTable dt = new DataTable();
            dt.Load(oCmd.ExecuteReader());
            MessageBox.Show(dt.Rows.Count.ToString());
            oConn.Close();
        }

回答1:

Try this:

using (OleDbConnection cn = new OleDbConnection(
    @"Provider=Microsoft.Jet.OLEDB.4.0;" + 
    @"Data Source=C:\full-path-without-filename;" + 
    @"Extended Properties=dBASE III;"))
using (OleDbCommand cm = cn.CreateCommand())
{
    cn.Open();
    cm.CommandText = "SELECT * FROM fox_samp"; // fox_samp is your filename
    using (OleDbDataReader dr = cm.ExecuteReader())
    {
        while (dr.Read())
        {
            Console.WriteLine(dr[0]);
        }
    }
}

I just ran this without errors. And this site can be very useful: ConnectionStrings.com

回答2:

Simply it cannot work since 64 bit systems no more support odbc dbf driver for 64 bit nor jet exists anymore..

来源：https://stackoverflow.com/questions/2065820/net-connection-to-dbase-dbf-file

标签

.net

winforms

dbase