Question

我读了这个topic并申请了我的代码。

//listSort contains ExpandoObjects
            List<dynamic> listSort = new List<dynamic>(listDynamic.Count);
            foreach (var item in listDynamic)
            {
                dynamic objDynamic = OrderBySpecialCharacter.ConvertToExpand(item);
                string sortValue = OrderBySpecialCharacter.GetValueInExpandoObject(objDynamic, colSortText);// "Name");
                objDynamic.Sort = OrderBySpecialCharacter.ConvertToACSII(sortValue.ToUpper());
                listSort.Add(objDynamic);
            }

            List<dynamic> sortedList = new List<dynamic>();
            if (colSort2 == null && colSort3 == null)
            {
                //Error in below line
                sortedList = listSort.OrderBy(x=> x.GetReflectedPropertyValue("Sort"),new MrFourCompare<string>()).ToList();
            }

    ----------------
     public static ExpandoObject ConvertToExpand<T>(T objInput)
            {
                ExpandoObject objExpand = new ExpandoObject();
                PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(typeof(T));
                IDictionary<String, Object> iExpand = ((IDictionary<String, Object>)objExpand);
                foreach (PropertyDescriptor prop in properties)
                    iExpand.Add(prop.Name, prop.GetValue(objInput));
                return (ExpandoObject)iExpand;
            }
    --------------------

我看到了错误：

严重级代码描述项目文件行抑制状态错误CS0411方法的类型参数＆＃39; Enumerable.OrderBy（IEnumerable，Func，IComparer）＆＃39; 无法从使用中推断出来。尝试指定类型参数显式。 DemoDynamicObject C：\ Users \ MrFour-IT \ Desktop \ DemoDynamicObject \ DemoDynamicObject \ OrderBySpecialCharacter.cs 154 Active

我不知道如何解决它！请帮我！感谢

Answer 1

如果您有if test == 1: OP_1(list_counter, repeat_question) while repeat_question != True: repeat_question, t_class_right, repeat_question = Repeat(repeat_question, option_right, t_class_right) elif test == 2: OP_2(list_counter, repeat_question) while repeat_question != True: repeat_question, t_class_right, repeat_question = Repeat(repeat_question, option_right, t_class_right) elif test == 3: OP_3(list_counter, repeat_question) while repeat_question != True: repeat_question, t_class_right, repeat_question = Repeat(repeat_question, option_right, t_class_right) else: T_Broke()喜欢此代码：

IComparer

根据您推荐的链接，您最常更改此行：

public class MrFourCompare: IComparer<String>
{
    public int Compare(string x, string y)
    {
        return string.Compare(x, y);
    }
}

到

sortedList = listSort.OrderBy(x=> x.GetReflectedPropertyValue("Sort"),new MrFourCompare<string>()).ToList();

因为在sortedList = listSort.OrderBy(x=> x.GetReflectedPropertyValue("Sort"),new MrFourCompare()).ToList();的实现中，您将其设置为字符串。

修改

IComparer不能是IComparer，因此如果您想按动态值的排序属性排序，则最常将排序属性转换为精确类型，如Dynamic或String。

Int

使用Dynamic Linq＆amp;时出错ICompare

1 个答案: