ASP.NET操作ORACLE数据库之模糊查询

 1          //连接Oracle数据库的连接字符串
 2         string connectionString = @"Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)
 3                                     (HOST=localhost) (PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=TestDB)));
 4                                     User Id=developer; Password=developer";
 5 　　　　　
 6         /// <summary>
 7         /// 制作商品查询页面 条件：根据商品名称模糊查询
 8         /// </summary>
 9         /// <returns></returns>
10         public ActionResult product(string ProName)
11         {
12             /*法一、直接使用like模糊查询
13              string sql = "select * from product where chvProName like ‘%‘ || upper(:ProName) || ‘%‘";
14             */
15             //法二、使用concat函数查询
16             string sql = "select * from product where chvProName like concat(concat(‘%‘, upper(:ProName)), ‘%‘)";
17 
18             ViewBag.name = ProName;
19          //使用OracleHelper辅助类
20             DataSet ds = OracleHelper.ExecuteDataset(connectionString, CommandType.Text, sql,
21                 new OracleParameter(":ProName", OracleType.NVarChar) { Value = ProName});
22             return View(ds.Tables[0]);
23         }

//连接Oracle数据库的连接字符串
string connectionString = @"Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)  
　　　　　　　　　　　　　　　 (HOST=localhost) (PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=TestDB))); 
　　　　　　　　　　　　　　　　User Id=developer; Password=developer";
protected void Button1_Click(object sender, EventArgs e)
        {
            string proName = this.txtProName.Text.Trim();
            /*法一、直接使用like模糊查询
              string sql = "select * from product where chvProName like ‘%‘|| upper(:proName) ||‘%‘";
            */
            //法二、使用concat函数查询
            string sql = "select * from product where chvProName like concat(concat(‘%‘, upper(:proName)), ‘%‘)";
            OracleConnection connection = new OracleConnection(connectionString);
            OracleCommand cmd = new OracleCommand(sql, connection);
            cmd.Parameters.Add(new OracleParameter(":proName", proName) { OracleType = OracleType.NVarChar });
            OracleDataAdapter adapter = new OracleDataAdapter(cmd);
            DataSet ds = new DataSet();
            adapter.Fill(ds);

            this.GvPro.DataSource = ds.Tables[0].DefaultView;
            this.GvPro.DataBind();
        }