两种获取connectionString的方式案例详解_实用技巧_

 public static string connectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString; 

 public static string connectionString = ConfigurationSettings.AppSettings["ConnectionString"]; 

 using System.Data;using Oracle.DataAccess.Client;  //注意添加Oracle的引用  ；SqlServer自带    DataSet dataSet = new DataSet();List listzh = new List();string sql = "SELECT CODE,NAME,PHONE_NUMBER FROM ZHXX WHERE 1=1 AND ROWNUM<10 "; using (OracleConnection oracleConnection = new OracleConnection(connectionString)) { 　　oracleConnection.Open(); 　　OracleCommand selectCommand = new OracleCommand(sql, oracleConnection); 　　OracleDataAdapter oracleDataAdapter = new OracleDataAdapter(selectCommand); 　　oracleDataAdapter.Fill(dataSet); } if (dataSet.Tables.Count > 0 && dataSet.Tables[0] != null && dataSet.Tables[0].Rows.Count > 0) { //连接成功且返回数据 　　foreach (DataRow dr in dataSet.Tables[0].Rows) 　　{ 　　　　listzh.Add(new ZHInfo { Code = dr["Code"].ToString(), Name = dr["Name"].ToString(), PublicNumber = dr["Phone_Number"].ToString() }); 　　} }

 public class ZHInfo { public string Code { get; set; } public string Name { get; set; } public string PublicNumber { get; set; } }