[C#对sql操作]C#对sql server 2008数据库操作

using System.Data; 

using System.Data.SqlClient 

SqlConnection conn = new  SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings[SiteClass.dbname].ToString()); 

SqlCommand cmd = new SqlCommand("dbo.Backorder", conn); 

conn.Open(); 

   cmd.CommandType = CommandType.StoredProcedure; 

               cmd.Parameters.Add("@orderid", SqlDbType.BigInt);  

               cmd.Parameters.Add("@userid", SqlDbType.Int);                

               cmd.Parameters.Add("@alert", SqlDbType.NVarChar, ); 

               cmd.Parameters.Add("@success", SqlDbType.Bit); 

               cmd.Parameters.Add("@eval", SqlDbType.NVarChar, ); 

               cmd.Parameters[].Value = orderid;  

               cmd.Parameters[].Value = SiteClass.CurrentUserId;                 

               cmd.Parameters["@alert"].Direction = ParameterDirection.Output; 

               cmd.Parameters["@success"].Direction = ParameterDirection.Output; 

                cmd.Parameters["@eval"].Direction = ParameterDirection.Output; 

               cmd.ExecuteNonQuery(); 

                string alert = cmd.Parameters["@alert"].Value.ToString(); 

                bool success = cmd.Parameters["@success"].Value.ToString().AsBool(); 

                string eval = cmd.Parameters["@eval"].Value.ToString();搜索 

Response.Write(SiteClass.writejson(true,true,alert,"",eval)); 

Response.End();