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SqlConnection conn = new SqlConnection();

conn.ConnectionString = "Server=127.0.0.1;User ID=sa;Password=fdahgdrethj31313210212121;Database=northwind;Persist Security Info=True";

conn.Open();

SqlDataAdapter da = new SqlDataAdapter("select * from 表", conn);

SqlCommandBuilder thisBulder = new SqlCommandBuilder(da);

DataSet ds = new DataSet();

da.Fill(ds);

ds.WriteXml(@"C:temp.xml");

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private void WriteXmlToFile(DataSet thisDataSet)
来源:http://www.tulaoshi.com/n/20160129/1490388.html