通过反射填充泛型集合List的静态方法

呃```花了一晚上时间,终于搞出来了如何通过反射,从datareader将数据填充到数据实体泛型集合的静态方法.

//kchen.core.basebusinessobject为通用数据实体类,此处仅为限定t所继承的类型
        public static ilist<t> filldatalistgeneric<t>(system.data.idatareader reader) where t : kchen.core.basebusinessobject
        {
            //实例化一个list<>泛型集合
            ilist<t> datalist = new list<t>();
            while (reader.read())
            {
                //由于是是未知的类型,所以必须通过activator.createinstance<t>()方法来依据t的类型动态创建数据实体对象
                t rowinstance = activator.createinstance<t>();
                //通过反射取得对象所有的property
                foreach (propertyinfo property in typeof(t).getproperties())
                {
                    //bindingfieldattribute为自定义的attribute,用于与数据库字段进行绑定
                    foreach (bindingfieldattribute fieldattr in property.getcustomattributes(typeof(bindingfieldattribute), true))
                    {
                        try
                        {
                            //取得当前数据库字段的顺序
                            int ordinal = reader.getordinal(fieldattr.fieldname);
                            if (reader.getvalue(ordinal) != dbnull.value)
                            {
                                //将datareader读取出来的数据填充到对象实体的属性里
                                property.setvalue(rowinstance, convert.changetype(reader.getvalue(ordinal), property.propertytype), null);
                            }
                        }
                        catch
                        {
                            break;
                        }
                    }
                }
                //将数据实体对象add到泛型集合中
                datalist.add(rowinstance);
            }
            return datalist;
        }
调用的时候使用如下代码

            //伪代码 oledbdatareader _ds = 创建一个oledbdatareader
            ilist<product> _result = kchen.utilities.filldatalistgeneric<product>(_ds);

此静态方法通过一个实体类型和datereader,快速的将数据填充到数据实体泛型集合中.