传入实体对象 自动生成添删该查sql语句
下面是添加的方法 请高手教删该查下面用的是反射和特性  public static String GetInsertSql(object s)
        {
           Type t= s.GetType();//得到对象的类型
           PropertyInfo[] proArr= t.GetProperties();
            //得到类的所有属性           string sql1 = "insert into " + t.Name+"(";
           string sql2 = ") values (";
           //Console.WriteLine(t.Name);           foreach (PropertyInfo pi in proArr)//所有的属性
           {
              object[] objArr= pi.GetCustomAttributes(false);
               //得到这个属性上所有的特性
               bool isNotIdnetity=true;//不是自增的标识
              foreach (object o in objArr)
              {
                  //Console.WriteLine(o.ToString());
                  if (o.ToString() == "AttributeDemo.IdentityAttribute")
                      isNotIdnetity = false;//是自增列
              }
              if (isNotIdnetity)//如果不是自增列,要添加到sql 语句中
              {
                  //Console.WriteLine(pi.Name);
                  sql1 += pi.Name + ",";
                  //Console.WriteLine(pi.GetValue(s,null).ToString());
                  sql2 += "'" + pi.GetValue(s, null).ToString() + "',";
              }
              
           }                      sql1 = sql1.Substring(0, sql1.Length - 1);
           sql2 = sql2.Substring(0, sql2.Length - 1)+")";
           //Console.WriteLine(sql1 + sql2);
           return sql1 + sql2;
        }