c#读出Oracle数据库用户表结构

///先引入Oracle.DataAccess.dll文件的命名空间

using Oracle;
using Oracle.DataAccess;
using Oracle.DataAccess.Client;
 
class Test
    {
        private const string SqlStr = "select * from Table_Name Where Rownum<2";
        private void But_WriteToXml(object sender, EventArgs e)
        {
            try
            {
                ///创建连接字符串
                string ConnectionString10GUp = "Data Source=q103; User Id=jtdata; Password=jtdata"; //此连接方式是10G、或11G的连接方法。
                string ConnectionString10GD = "Data Source=q103;Persist Security Info=True;User ID=jtdata;Password=jtdata";//此为10G以下。
                OracleConnection conn = new OracleConnection(ConnectionString10GD);
                OracleCommand cmd = new OracleCommand(SqlStr, conn);
                DataSet ds = new DataSet();
                OracleDataAdapter oda = new OracleDataAdapter(cmd);
                oda.Fill(ds, "Table");
                ds.WriteXml("jtdata.xml", XmlWriteMode.WriteSchema);
                MessageBox.Show("Write To Xml Succeed");
            }
            catch (Exception ex)
            { MessageBox.Show(ex.Message); }
        }
 
 
//DbProviderFactory fa = DbProviderFactories.GetFactory("Oracle.DataAccess.Client");
                //DbConnection con = fa.CreateConnection();
                //con.ConnectionString = ConnectionString;
                //DbCommand dbc = con.CreateCommand();
                //dbc.CommandText = "select * from JT_X_KHDDMX where rownum<2";
                //DbDataAdapter ada = fa.CreateDataAdapter();
                //ada.SelectCommand = dbc;
                //DataSet ds = new DataSet();
                //ada.Fill(ds);
                //ds.WriteXml("txt.xml", XmlWriteMode.WriteSchema);
                //Console.WriteLine("读取完成");
 
    }