阻止项目添加到字典
preventing the item to add to the dictionary
我想在 3 级类别中创建分层列表。
我的数据有以下几种：
var appCategoryList = new List<AppCategoryDataModel>() {
new AppCategoryDataModel() { AppCategoryId = 4844, ParentappCategoryId = null , AppCategoryName = "ItemResearch", ProtocolId = 5164, ProtocolTitle="ABC: Evaluation" },
new AppCategoryDataModel() { AppCategoryId = 4844, ParentappCategoryId = null, AppCategoryName = "ItemResearch", ProtocolId = null, ProtocolTitle=""},
new AppCategoryDataModel() { AppCategoryId = 4845, ParentappCategoryId = null, AppCategoryName = "ItemHostpital", ProtocolId = null, ProtocolTitle="" },
new AppCategoryDataModel() { AppCategoryId = 4845, ParentappCategoryId = null, AppCategoryName = "ItemHostpital", ProtocolId =5162 , ProtocolTitle="ABC: 3/28/20" },
new AppCategoryDataModel() { AppCategoryId = 4845, ParentappCategoryId = null, AppCategoryName = "ItemHostpital", ProtocolId =5164 , ProtocolTitle="ABC: Evaluation" },
new AppCategoryDataModel() { AppCategoryId = 4845, ParentappCategoryId = null, AppCategoryName = "ItemHostpital", ProtocolId =5165 , ProtocolTitle="ABC: section", },
new AppCategoryDataModel() { AppCategoryId = 4845, ParentappCategoryId = null, AppCategoryName = "ItemHostpital", ProtocolId =5192 , ProtocolTitle="ABC: 3/31/20", },
new AppCategoryDataModel() { AppCategoryId = 4846, ParentappCategoryId = null, AppCategoryName = "Contact information", ProtocolId = null, ProtocolTitle="", },
new AppCategoryDataModel() { AppCategoryId = 4846, ParentappCategoryId = null, AppCategoryName = "Contact information", ProtocolId =5164 , ProtocolTitle="ABC: Evaluation", },
new AppCategoryDataModel() { AppCategoryId = 4852, ParentappCategoryId = null, AppCategoryName = "UP", ProtocolId =null , ProtocolTitle="", },
new AppCategoryDataModel() { AppCategoryId = 4852, ParentappCategoryId = null, AppCategoryName = "UP", ProtocolId = 5164, ProtocolTitle="ABC: Evaluation", },
new AppCategoryDataModel() { AppCategoryId = 5023, ParentappCategoryId = null, AppCategoryName = "Call survival guide", ProtocolId = null, ProtocolTitle="" },
new AppCategoryDataModel() { AppCategoryId = 5023, ParentappCategoryId = null, AppCategoryName = "Call survival guides", ProtocolId =5164 , ProtocolTitle="ABC: Evaluation" },
new AppCategoryDataModel() { AppCategoryId = 5085, ParentappCategoryId = null, AppCategoryName = "OE", ProtocolId =null, ProtocolTitle="" },
new AppCategoryDataModel() { AppCategoryId = 5085, ParentappCategoryId = null, AppCategoryName = "OE", ProtocolId =5164 , ProtocolTitle="ABC: Evaluation" },
new AppCategoryDataModel() { AppCategoryId = 5099, ParentappCategoryId = null, AppCategoryName = "OEM", ProtocolId =null , ProtocolTitle=null },
new AppCategoryDataModel() { AppCategoryId = 5334, ParentappCategoryId = 5085, AppCategoryName = "mmkk update", ProtocolId =null , ProtocolTitle= null },
new AppCategoryDataModel() { AppCategoryId = 5336, ParentappCategoryId = 5085, AppCategoryName = "xdgdrg", ProtocolId =null , ProtocolTitle=null },
new AppCategoryDataModel() { AppCategoryId = 5348, ParentappCategoryId = 5023, AppCategoryName = "test", ProtocolId =null , ProtocolTitle=null },
new AppCategoryDataModel() { AppCategoryId = 5341, ParentappCategoryId = 5023, AppCategoryName = "New Category Level-1", ProtocolId =null , ProtocolTitle= null },
new AppCategoryDataModel() { AppCategoryId = 5349, ParentappCategoryId = 5341, AppCategoryName = "New Category Level-2", ProtocolId =null , ProtocolTitle= null },
new AppCategoryDataModel() { AppCategoryId = 5352, ParentappCategoryId = 5348, AppCategoryName = "New category3", ProtocolId =null , ProtocolTitle= null },
}.OrderBy(ap => ap.AppCategoryName);
AppCategoryDataModel
public class AppCategoryDataModel
{
public int AppCategoryId { get; set; }
public int? ParentappCategoryId { get; set; }
public string AppCategoryName { get; set; }
public int? ProtocolId { get; set; }
public string ProtocolTitle { get; set; }
}
Dictionary<int, FirstLevelCategory> dictCategories = new Dictionary<int, FirstLevelCategory>();
foreach (AppCategoryDataModel category in appCategoryList)
{
if (!dictCategories.ContainsKey(category.AppCategoryId))
{
dictCategories.Add(category.AppCategoryId, new FirstLevelCategory()
{
AppCategoryId = category.AppCategoryId,
AppCategoryName = category.AppCategoryName,
AppCategoryProtocolData = category.ProtocolId != null ?
new List<ProtocolDetails>() {
new ProtocolDetails()
{
ProtocolId = (int)category.ProtocolId,
ProtocolTitle = category.ProtocolTitle
}
} : new List<ProtocolDetails>(),
SubCategory = category.ParentappCategoryId != null
? GetSubCategoryList(appCategoryList, category.AppCategoryId)
: new List<SecondLevelCategory>()
});
}
else
{
if (category.ProtocolId != null)
dictCategories[category.AppCategoryId].AppCategoryProtocolData.Add(new ProtocolDetails()
{
ProtocolId = (int)category.ProtocolId,
ProtocolTitle = category.ProtocolTitle
});
}
}
foreach (var key in dictCategories.Keys.ToList())
{
dictCategories[key].CategoryProtocolCount = dictCategories[key].AppCategoryProtocolData.Count();
}
一级类别
public class FirstLevelCategory
{
public int AppCategoryId { get; set; }
public string AppCategoryName { get; set; }
public bool IsExpand { get; set; }
public bool IsExpandAll { get; set; }
public bool IsCategoryHierarchyExpanded { get; set; }
//count of AppCategoryProtocolData
public int CategoryProtocolCount { get; set; }
public List<SecondLevelCategory> SubCategory { get; set; }
public List<ProtocolDetails> AppCategoryProtocolData { get; set; }
}
public class ProtocolDetails
{
public int ProtocolId { get; set; }
public string ProtocolTitle { get; set; }
}
我的问题是 ParentappCategoryId != null 应该作为子类别出现的项目，但它也已添加到第一级类别中。我无法正确过滤。
我应该如何防止第一个添加具有 ParentAppCategory 的项目。
二级类别
public class SecondLevelCategory
{
public int AppCategoryId { get; set; }
public string AppCategoryName { get; set; }
public bool? ToggleSubCategory { get; set; }
public bool IsExpand { get; set; }
public int subcategoryProtocolCount { get; set; }
public IEnumerable<ProtocolDetails> SubCategoryProtocolData { get; set; }
public List<ThirdLevelCategory> ThirdLevelCategory { get; set; }
}
三级类别
public class ThirdLevelCategory
{
public int AppCategoryId { get; set; }
public string AppCategoryName { get; set; }
public bool? ToggleThirdLevelCategory { get; set; }
public int? ThirdLevelCategoryProtocolCount { get; set; }
public IEnumerable<ProtocolDetails> ThirdLevelCategoryProtocolData { get; set; }
}
预期结果：
ItemResearch
ABC: Evaluation
ItemHostpital
ABC: 3/28/20
ABC: Evaluation
ABC: section
ABC: 3/31/20
Contact information
ABC: Evaluation
UP
ABC: Evaluation
OE
ABC: Evaluation
mmkk update --subcategory
xdgdrg --subcategory
Call survival guides
ABC: Evaluation --details
test --subcategory
New category3 --thirdcategory
New Category Level-1 --subcategory
New Category Level-2 -- thirdcategory
My problem here is the item where ParentappCategoryId != null should come as a sub-category, but that has also been added in the first level category. I am not able to filter that properly.
我将其解释为 我只想要在我的字典的第一级中带有 ParentappCategoryId == null 的项目。
如果是这种情况，应该可以通过过滤应用程序类别列表 来解决，然后 迭代它以将 first-level 项添加到您的字典中。
这是一个如何使用 System.Linq 命名空间中的 .Where() 实现的示例：
替换
foreach (AppCategoryDataModel category in appCategoryList)
和
//using System.Linq;
var firstLevelItems = appCategoryList.Where(app => app.ParentappCategoryId == null);
foreach (AppCategoryDataModel category in firstLevelItems)
注意：不需要单独的变量；我主要考虑使用它来提高可读性。
你不妨这样实现：
//using System.Linq;
foreach (AppCategoryDataModel category in appCategoryList.Where(app => app.ParentappCategoryId == null))
此外 -- 我不确定这部分是否会给您带来问题，但我觉得逻辑很奇怪：
SubCategory = category.ParentappCategoryId != null
? GetSubCategoryList(appCategoryList, category.AppCategoryId)
: new List<SecondLevelCategory>()
我将代码解释为：
Populate category's SubCategory only if category has a parent
对我来说，考虑到 的 first-level 项没有 parent 的情况，这似乎意味着 none 的 first-level 项目应该有任何子类别。我觉得这是自相矛盾的。如有不妥请指正
如果我是对的，我建议实施 GetSubCategoryList() 以便 returns 如果 appCategoryList 中的 none 项具有 ParentappCategoryId == category.AppCategoryId.
如果你有，你可以简单地选择
SubCategory = GetSubCategoryList(appCategoryList, category.AppCategoryId)
更新：可能实施 GetSubCategoryList (GetSubCategories)
您在评论中提到，您当前的 GetSubCategoryList（和 GetThirdLevelCategoryList）实现几乎重复了主 foreach 循环的实现。
根据我的理解，这表明 classes FirstLevelCategory 和 SecondLevelCategory（以及 ThirdLevelCategory）可以由单个 class 代替： AppCategory.
public class AppCategory
{
public int Id { get; set; }
public string Name { get; set; }
public int ProtocolCount { get; set; }
public List<AppCategory> SubCategories { get; set; }
public List<ProtocolDetails> ProtocolData { get; set; }
}
此外，填充 AppCategoryProtocolData 的逻辑可以通过对共享 (AppCategory)Id 的所有应用类别进行分组并基于该分组创建 ProtocolDetails 列表来简化。
从这里开始，我们可以利用递归来获取每个类别的子类别。
private static List<AppCategory> GetSubCategories(
List<AppCategoryDataModel> appCategories,
int? parentAppCategoryId)
{
// return empty list if no sub categories exist
if (!appCategories.Any(ac => ac.ParentAppCategoryId == parentAppCategoryId))
{
return new();
}
List<AppCategory> subCategories = appCategories
.Where(ac => ac.ParentAppCategoryId == parentAppCategoryId)
// Simplify the logic of populating the ProtocolData content
.GroupBy(ac => ac.AppCategoryId)
.Select(gr => new AppCategory
{
Id = gr.Key,
Name = gr.First().AppCategoryName,
ProtocolData = gr
.Where(ac => ac.ProtocolId != null)
.Select(ac => new ProtocolDetails
{
Id = ac.ProtocolId.Value,
Title = ac.ProtocolTitle
})
.ToList()
})
.ToList();
foreach (var subCat in subCategories)
{
// Make recursive method call to populate _this_ category's sub categories
subCat.SubCategories = GetSubCategories(appCategories, subCat.Id);
subCat.ProtocolCount = subCat.ProtocolData.Count;
}
return subCategories;
}
事实证明，您字典中的所有 first-level 项实际上都可以被视为 具有 [=39= 的 (non-existing) 类别的子类别]。我们可以通过使用 GetSubCategories.
的实现找到我们的 first-level 项目来利用这一观察结果
主代码块可以缩减为：
Dictionary<int, AppCategory> dictCategories = new();
var firstLevelCategories = GetSubCategories(appCategoryList, null);
foreach (var category in firstLevelCategories)
{
dictCategories.Add(category.Id, category);
}
使用您的示例输入数据生成的层次结构如下所示：
Call survival guide
ABC: Evaluation
New Category Level-1
New Category Level-2
test
New category3
Contact information
ABC: Evaluation
ItemHostpital
ABC: 3/28/20
ABC: Evaluation
ABC: section
ABC: 3/31/20
ItemResearch
ABC: Evaluation
OE
ABC: Evaluation
mmkk update
xdgdrg
OEM
UP
ABC: Evaluation
请注意，此结果包括 OEM，但未包含在您的预期结果 中。如果您只想在字典中包含 first-level 个包含 ProtocolData 的项目，您可以例如筛选如下：
foreach (var category in firstLevelCategories.Where(c => c.ProtocolCount > 0))
{
dictCategories.Add(category.Id, category);
}
示例 fiddle here.
我想在 3 级类别中创建分层列表。
我的数据有以下几种：
var appCategoryList = new List<AppCategoryDataModel>() {
new AppCategoryDataModel() { AppCategoryId = 4844, ParentappCategoryId = null , AppCategoryName = "ItemResearch", ProtocolId = 5164, ProtocolTitle="ABC: Evaluation" },
new AppCategoryDataModel() { AppCategoryId = 4844, ParentappCategoryId = null, AppCategoryName = "ItemResearch", ProtocolId = null, ProtocolTitle=""},
new AppCategoryDataModel() { AppCategoryId = 4845, ParentappCategoryId = null, AppCategoryName = "ItemHostpital", ProtocolId = null, ProtocolTitle="" },
new AppCategoryDataModel() { AppCategoryId = 4845, ParentappCategoryId = null, AppCategoryName = "ItemHostpital", ProtocolId =5162 , ProtocolTitle="ABC: 3/28/20" },
new AppCategoryDataModel() { AppCategoryId = 4845, ParentappCategoryId = null, AppCategoryName = "ItemHostpital", ProtocolId =5164 , ProtocolTitle="ABC: Evaluation" },
new AppCategoryDataModel() { AppCategoryId = 4845, ParentappCategoryId = null, AppCategoryName = "ItemHostpital", ProtocolId =5165 , ProtocolTitle="ABC: section", },
new AppCategoryDataModel() { AppCategoryId = 4845, ParentappCategoryId = null, AppCategoryName = "ItemHostpital", ProtocolId =5192 , ProtocolTitle="ABC: 3/31/20", },
new AppCategoryDataModel() { AppCategoryId = 4846, ParentappCategoryId = null, AppCategoryName = "Contact information", ProtocolId = null, ProtocolTitle="", },
new AppCategoryDataModel() { AppCategoryId = 4846, ParentappCategoryId = null, AppCategoryName = "Contact information", ProtocolId =5164 , ProtocolTitle="ABC: Evaluation", },
new AppCategoryDataModel() { AppCategoryId = 4852, ParentappCategoryId = null, AppCategoryName = "UP", ProtocolId =null , ProtocolTitle="", },
new AppCategoryDataModel() { AppCategoryId = 4852, ParentappCategoryId = null, AppCategoryName = "UP", ProtocolId = 5164, ProtocolTitle="ABC: Evaluation", },
new AppCategoryDataModel() { AppCategoryId = 5023, ParentappCategoryId = null, AppCategoryName = "Call survival guide", ProtocolId = null, ProtocolTitle="" },
new AppCategoryDataModel() { AppCategoryId = 5023, ParentappCategoryId = null, AppCategoryName = "Call survival guides", ProtocolId =5164 , ProtocolTitle="ABC: Evaluation" },
new AppCategoryDataModel() { AppCategoryId = 5085, ParentappCategoryId = null, AppCategoryName = "OE", ProtocolId =null, ProtocolTitle="" },
new AppCategoryDataModel() { AppCategoryId = 5085, ParentappCategoryId = null, AppCategoryName = "OE", ProtocolId =5164 , ProtocolTitle="ABC: Evaluation" },
new AppCategoryDataModel() { AppCategoryId = 5099, ParentappCategoryId = null, AppCategoryName = "OEM", ProtocolId =null , ProtocolTitle=null },
new AppCategoryDataModel() { AppCategoryId = 5334, ParentappCategoryId = 5085, AppCategoryName = "mmkk update", ProtocolId =null , ProtocolTitle= null },
new AppCategoryDataModel() { AppCategoryId = 5336, ParentappCategoryId = 5085, AppCategoryName = "xdgdrg", ProtocolId =null , ProtocolTitle=null },
new AppCategoryDataModel() { AppCategoryId = 5348, ParentappCategoryId = 5023, AppCategoryName = "test", ProtocolId =null , ProtocolTitle=null },
new AppCategoryDataModel() { AppCategoryId = 5341, ParentappCategoryId = 5023, AppCategoryName = "New Category Level-1", ProtocolId =null , ProtocolTitle= null },
new AppCategoryDataModel() { AppCategoryId = 5349, ParentappCategoryId = 5341, AppCategoryName = "New Category Level-2", ProtocolId =null , ProtocolTitle= null },
new AppCategoryDataModel() { AppCategoryId = 5352, ParentappCategoryId = 5348, AppCategoryName = "New category3", ProtocolId =null , ProtocolTitle= null },
}.OrderBy(ap => ap.AppCategoryName);
AppCategoryDataModel
public class AppCategoryDataModel
{
public int AppCategoryId { get; set; }
public int? ParentappCategoryId { get; set; }
public string AppCategoryName { get; set; }
public int? ProtocolId { get; set; }
public string ProtocolTitle { get; set; }
}
Dictionary<int, FirstLevelCategory> dictCategories = new Dictionary<int, FirstLevelCategory>();
foreach (AppCategoryDataModel category in appCategoryList)
{
if (!dictCategories.ContainsKey(category.AppCategoryId))
{
dictCategories.Add(category.AppCategoryId, new FirstLevelCategory()
{
AppCategoryId = category.AppCategoryId,
AppCategoryName = category.AppCategoryName,
AppCategoryProtocolData = category.ProtocolId != null ?
new List<ProtocolDetails>() {
new ProtocolDetails()
{
ProtocolId = (int)category.ProtocolId,
ProtocolTitle = category.ProtocolTitle
}
} : new List<ProtocolDetails>(),
SubCategory = category.ParentappCategoryId != null
? GetSubCategoryList(appCategoryList, category.AppCategoryId)
: new List<SecondLevelCategory>()
});
}
else
{
if (category.ProtocolId != null)
dictCategories[category.AppCategoryId].AppCategoryProtocolData.Add(new ProtocolDetails()
{
ProtocolId = (int)category.ProtocolId,
ProtocolTitle = category.ProtocolTitle
});
}
}
foreach (var key in dictCategories.Keys.ToList())
{
dictCategories[key].CategoryProtocolCount = dictCategories[key].AppCategoryProtocolData.Count();
}
一级类别
public class FirstLevelCategory
{
public int AppCategoryId { get; set; }
public string AppCategoryName { get; set; }
public bool IsExpand { get; set; }
public bool IsExpandAll { get; set; }
public bool IsCategoryHierarchyExpanded { get; set; }
//count of AppCategoryProtocolData
public int CategoryProtocolCount { get; set; }
public List<SecondLevelCategory> SubCategory { get; set; }
public List<ProtocolDetails> AppCategoryProtocolData { get; set; }
}
public class ProtocolDetails
{
public int ProtocolId { get; set; }
public string ProtocolTitle { get; set; }
}
我的问题是 ParentappCategoryId != null 应该作为子类别出现的项目，但它也已添加到第一级类别中。我无法正确过滤。
我应该如何防止第一个添加具有 ParentAppCategory 的项目。
二级类别
public class SecondLevelCategory
{
public int AppCategoryId { get; set; }
public string AppCategoryName { get; set; }
public bool? ToggleSubCategory { get; set; }
public bool IsExpand { get; set; }
public int subcategoryProtocolCount { get; set; }
public IEnumerable<ProtocolDetails> SubCategoryProtocolData { get; set; }
public List<ThirdLevelCategory> ThirdLevelCategory { get; set; }
}
三级类别
public class ThirdLevelCategory
{
public int AppCategoryId { get; set; }
public string AppCategoryName { get; set; }
public bool? ToggleThirdLevelCategory { get; set; }
public int? ThirdLevelCategoryProtocolCount { get; set; }
public IEnumerable<ProtocolDetails> ThirdLevelCategoryProtocolData { get; set; }
}
预期结果：
ItemResearch
ABC: Evaluation
ItemHostpital
ABC: 3/28/20
ABC: Evaluation
ABC: section
ABC: 3/31/20
Contact information
ABC: Evaluation
UP
ABC: Evaluation
OE
ABC: Evaluation
mmkk update --subcategory
xdgdrg --subcategory
Call survival guides
ABC: Evaluation --details
test --subcategory
New category3 --thirdcategory
New Category Level-1 --subcategory
New Category Level-2 -- thirdcategory
My problem here is the item where ParentappCategoryId != null should come as a sub-category, but that has also been added in the first level category. I am not able to filter that properly.
我将其解释为 我只想要在我的字典的第一级中带有 ParentappCategoryId == null 的项目。
如果是这种情况，应该可以通过过滤应用程序类别列表 来解决，然后 迭代它以将 first-level 项添加到您的字典中。
这是一个如何使用 System.Linq 命名空间中的 .Where() 实现的示例：
替换
foreach (AppCategoryDataModel category in appCategoryList)
和
//using System.Linq;
var firstLevelItems = appCategoryList.Where(app => app.ParentappCategoryId == null);
foreach (AppCategoryDataModel category in firstLevelItems)
注意：不需要单独的变量；我主要考虑使用它来提高可读性。
你不妨这样实现：
//using System.Linq;
foreach (AppCategoryDataModel category in appCategoryList.Where(app => app.ParentappCategoryId == null))
此外 -- 我不确定这部分是否会给您带来问题，但我觉得逻辑很奇怪：
SubCategory = category.ParentappCategoryId != null
? GetSubCategoryList(appCategoryList, category.AppCategoryId)
: new List<SecondLevelCategory>()
我将代码解释为：
Populate
category'sSubCategoryonly ifcategoryhas a parent
对我来说，考虑到 的 first-level 项没有 parent 的情况，这似乎意味着 none 的 first-level 项目应该有任何子类别。我觉得这是自相矛盾的。如有不妥请指正
如果我是对的，我建议实施 GetSubCategoryList() 以便 returns 如果 appCategoryList 中的 none 项具有 ParentappCategoryId == category.AppCategoryId.
如果你有，你可以简单地选择
SubCategory = GetSubCategoryList(appCategoryList, category.AppCategoryId)
更新：可能实施 GetSubCategoryList (GetSubCategories)
您在评论中提到，您当前的 GetSubCategoryList（和 GetThirdLevelCategoryList）实现几乎重复了主 foreach 循环的实现。
根据我的理解，这表明 classes FirstLevelCategory 和 SecondLevelCategory（以及 ThirdLevelCategory）可以由单个 class 代替： AppCategory.
public class AppCategory
{
public int Id { get; set; }
public string Name { get; set; }
public int ProtocolCount { get; set; }
public List<AppCategory> SubCategories { get; set; }
public List<ProtocolDetails> ProtocolData { get; set; }
}
此外，填充 AppCategoryProtocolData 的逻辑可以通过对共享 (AppCategory)Id 的所有应用类别进行分组并基于该分组创建 ProtocolDetails 列表来简化。
从这里开始，我们可以利用递归来获取每个类别的子类别。
private static List<AppCategory> GetSubCategories(
List<AppCategoryDataModel> appCategories,
int? parentAppCategoryId)
{
// return empty list if no sub categories exist
if (!appCategories.Any(ac => ac.ParentAppCategoryId == parentAppCategoryId))
{
return new();
}
List<AppCategory> subCategories = appCategories
.Where(ac => ac.ParentAppCategoryId == parentAppCategoryId)
// Simplify the logic of populating the ProtocolData content
.GroupBy(ac => ac.AppCategoryId)
.Select(gr => new AppCategory
{
Id = gr.Key,
Name = gr.First().AppCategoryName,
ProtocolData = gr
.Where(ac => ac.ProtocolId != null)
.Select(ac => new ProtocolDetails
{
Id = ac.ProtocolId.Value,
Title = ac.ProtocolTitle
})
.ToList()
})
.ToList();
foreach (var subCat in subCategories)
{
// Make recursive method call to populate _this_ category's sub categories
subCat.SubCategories = GetSubCategories(appCategories, subCat.Id);
subCat.ProtocolCount = subCat.ProtocolData.Count;
}
return subCategories;
}
事实证明，您字典中的所有 first-level 项实际上都可以被视为 具有 [=39= 的 (non-existing) 类别的子类别]。我们可以通过使用 GetSubCategories.
主代码块可以缩减为：
Dictionary<int, AppCategory> dictCategories = new();
var firstLevelCategories = GetSubCategories(appCategoryList, null);
foreach (var category in firstLevelCategories)
{
dictCategories.Add(category.Id, category);
}
使用您的示例输入数据生成的层次结构如下所示：
Call survival guide
ABC: Evaluation
New Category Level-1
New Category Level-2
test
New category3
Contact information
ABC: Evaluation
ItemHostpital
ABC: 3/28/20
ABC: Evaluation
ABC: section
ABC: 3/31/20
ItemResearch
ABC: Evaluation
OE
ABC: Evaluation
mmkk update
xdgdrg
OEM
UP
ABC: Evaluation
请注意，此结果包括 OEM，但未包含在您的预期结果 中。如果您只想在字典中包含 first-level 个包含 ProtocolData 的项目，您可以例如筛选如下：
foreach (var category in firstLevelCategories.Where(c => c.ProtocolCount > 0))
{
dictCategories.Add(category.Id, category);
}
示例 fiddle here.