C＃在Dictionary中重复键错误< int>键入键 [英] C# Duplicate key error in Dictionary with List<int> type key

问题描述

您好，

我正在尝试创建一个字典项，其键为列表类型，值为自定义对象类型。它给了我一个错误

已经添加了一个具有相同键的项目。


这是我的代码：

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解决方案

您是否从代码中发现您只创建了一个列表？

创建一个List意味着什么？ ...如果你在列表中说一个项目，那么代码很好，因为它稍后在代码中对我有用

详细说明，你只是创建一个list对象：PKey。然后尝试在循环的每次迭代中将相同的对象（PKey）添加到字典对象A的Keys集合中。


添加到A'的密钥集合中的每个对象必须是唯一的。


要修复代码，你需要将列表声明移到循环内部

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Hello,
I am trying to create a dictionary item with its key as list type and value as custom object type. It gives me a error
"An item with the same key has already been added."

Here is my code:

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解决方案

You do realize from your code that you have created only one list?

Creating one List means? ... if you are saying about 1 item in the list, then the code is fine as it is of some use to me later in the code

To elaborate, you are only creating one list object: PKey. You then try to add that same object (PKey) to the Keys collection of your dictionary object A on each iteration of the loop.

Each object added to A''s keys collection must be unique.

To fix your code you''d need to move the list declaration to inside the loop

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