1. using Oracle.DataAccess.Client;  
2. public static String ConnectionString = "Data Source=orcl;User ID=hr;Password=hr;";  
3.   
4. public static int Update(MacInfo model)  
5.     {  
6.         StringBuilder strSql = new StringBuilder();  
7.         strSql.Append("update MacInfo set ");  
8.         strSql.Append("Mac_Address=:Mac_Address,");  
9.         strSql.Append("Mac_Status=:Mac_Status");  
10.         strSql.Append(" where MacInfo_ID=:MacInfo_ID");  
11.         //strSql.Append("Mac_Address='"+model.Mac_Address+"',");//拼凑Update字符串是可以执行成功的  
12.         //strSql.Append("Mac_Status="+model.Mac_Status);  
13.         //strSql.Append(" where MacInfo_ID='"+model.MacInfo_ID+"'");  
14.     //这里注意，strSql中的Update语句参数顺序为：Mac_Address、Mac_Status、MacInfo_ID，所以下面OracleParameter  
15.     //也必须按这个顺序来声明、赋值  
16.         OracleParameter[] parameters = {                      
17.                     new OracleParameter(":Mac_Address", OracleDbType.Varchar2,17),  
18.                     new OracleParameter(":Mac_Status", OracleDbType.Int32,4),  
19.                     new OracleParameter(":MacInfo_ID", OracleDbType.Varchar2,17)};  
20.         parameters[0].Value = model.Mac_Address;  
21.         parameters[1].Value = model.Mac_Status.ToString();  
22.         parameters[2].Value = model.MacInfo_ID;  
23.   
24.         int result = ExecuteCommand(strSql.ToString(), CommandType.Text,parameters);  
25.         return result;  
26.     }  
27. public static int ExecuteCommand(string queryString, CommandType commandType, params OracleParameter[] param)  
28.     {  
29.         int flag = 0;  
30.         using(OracleConnection con = new OracleConnection(ConnectionString))  
31.         {  
32.             OracleCommand command = new OracleCommand(queryString, con);  
33.             command.CommandType = commandType;  
34.             if(param != null)  
35.             {  
36.                 for(int i = 0; i < param.Length; i++)  
37.                 {  
38.                     command.Parameters.Add(param[i]);  
39.                 }  
40.             }  
41.             try  
42.             {  
43.                 command.Connection.Open();  
44.                 flag = command.ExecuteNonQuery();                  
45.             }  
46.             catch(Exception ex)  
47.             {  
48.                 throw ex;  
49.             }  
50.             finally  
51.             {  
52.                 command.Connection.Close();  
53.                 command.Dispose();  
54.                 command = null;  
55.             }  
56.         }  
57.         return flag;  
58.     }