如何在添加数据后对字典进行排序(c#)

Question

大家好，我的问题是当我在c#中添加数据到字典时，我想切换(Sortype)字符串来检查用户想要的订单数据这样的:

string SortType="ByDownloads";
Dictionary<string, Data> WorldInfo = JsonConvert.DeserializeObject<Dictionary<string, Data>>(Res.Body.ToString());
switch (SortType)
{
case "ByDownloads":
WorldInfo.OrderByDescending(AllData => AllData.Value.PostDownloads).ToList();
break;
case "ByViews":
WorldInfo.OrderBy(AllData => AllData.Value.PostViews).ToList();
break;
}

以这种方式，代码将不工作，数据不排序但是当我使用这种方式代码将工作:

Dictionary<string, Data> WorldInfo = JsonConvert.DeserializeObject<Dictionary<string, Data>>(Res.Body.ToString());
var NewSortedDictionary = WorldInfo.OrderByDescending(AllData => AllData.Value.PostViews).ToList();

所以我正在寻找正确的方法来做到这一点，并使用(WorldInfo)字典和开关(SortType)，然后我使用它而不是(NewSortedDictionary)。谢谢你:)

Answer 1

感谢所有评论这个问题的人:)我用这种方式修复了它，我希望它将来能帮助别人:

SortType="ByDownloads";
Dictionary<string, Data> NormallDictionary = JsonConvert.DeserializeObject<Dictionary<string, Data>>(Res.Body.ToString());
List<KeyValuePair<string,Data>> MySortedDictionary=  new List<KeyValuePair<string, Data>>();
switch (SortType)
{
case "ByDownloads":
MySortedDictionary = NormallDictionary.OrderByDescending(x => x.Value.Downloads).ToList();
break;
case "ByViews":
MySortedDictionary = NormallDictionary.OrderByDescending(x => x.Value.Views).ToList();
break;
}

现在你可以使用MySortedDictionary

Answer 2

它在您的情况下不起作用的原因是orderbydescent在排序后返回一个对象。

你可以这样做

Dictionary<string, Data> MyDictionary = JsonConvert.DeserializeObject<Dictionary<string, Data>>(Res.Body.ToString()));
var data = Sortype == "ByViews" ? WorldInfo.OrderByDescending(AllData => AllData.Value.WorldPDownloads).ToList() : Sortype == 'ByDownloads' ? WorldInfo.OrderBy(AllData => AllData.Value.WorldPDownloads).ToList() : null;

或

string Sortype = "ByDate";
Dictionary<string, Data> MyDictionary = JsonConvert.DeserializeObject<Dictionary<string, Data>>(Res.Body.ToString());
switch (Sortype)
{
case "ByViews":
WorldInfo = WorldInfo.OrderByDescending(AllData => AllData.Value.WorldPDownloads).ToList();
break;
case "ByDownloads":
WorldInfo =WorldInfo.OrderBy(AllData => AllData.Value.WorldPDownloads).ToList();
break;
}

Answer 3

我不知道这是否是一个错误或只是故意错过，但您正在设置string Sortype ="ByDate";而实际上在switch语句中没有"ByDate"。