首页 > 解决方案 > 无法从 'void' 转换为 'System.Collections.Generic.ListC#

问题描述

我正在尝试将下面代码中的每个循环的新列表添加到字典中,但我目前正在努力解决以下错误:

无法从 'void' 转换为 'System.Collections.Generic.List

public class WeaponGen{
Dictionary<string, List<string>> weapons = new Dictionary <string, List<string>>(); 

public void WeaponGeneration(int GenerationCount)
{
    Weapon weapon = new Weapon(); //this class contains basic calculation methods
    weapons.Clear();

    for (int i = 0; i < GenerationCount; i++)
    {
        string listname = "weapon" + i;
        string id = Random.Range(1, 41).ToString();

        List<string>[] _lists = new List<string>[GenerationCount];
        _lists[i] = new List<string>();

        weapons.Add(listname, _lists[i].Add(id)); //this line throws an error
        weapons.Add(listname, _lists[i].Add(weapon.GetName(id))); //this line throws an error
        weapons.Add(listname, _lists[i].Add(weapon.GetRarity(id))); //this line throws an error
        weapons.Add(listname, _lists[i].Add(weapon.GetType(id))); //this line throws an error
        weapons.Add(listname, _lists[i].Add(weapon.GetDmg(id).ToString())); //this line throws an error
        weapons.Add(listname, _lists[i].Add(weapon.GetSpeed(id).ToString())); //this line throws an error
        weapons.Add(listname, _lists[i].Add(weapon.GetCost(id).ToString())); //this line throws an error
    }
}}

由于我的编码技能在某些方面确实缺乏,我认为对语言有更好掌握的人可以帮助我。非常感谢您的每一次帮助!

标签: c#arrayslistdictionaryreturn

解决方案


欢迎来到 SO!

列表add方法不返回任何值:https ://docs.microsoft.com/en-us/dotnet/api/system.collections.generic.list-1.add?view=netframework-4.7.2 。

因此,如果我正确理解了您的想法,您需要用所需的值填充列表并将其本身添加到字典中,如下所示:

for (int i = 0; i < GenerationCount; i++)
{
    string listname = "weapon" + i;
    string id = Random.Range(1, 41).ToString();

    List<string>[] _lists = new List<string>[GenerationCount];
    _lists[i] = new List<string>();

    _lists[i].Add(id); 
    _lists[i].Add(weapon.GetName(id)); 
    _lists[i].Add(weapon.GetRarity(id)); 
    _lists[i].Add(weapon.GetType(id)); 
    _lists[i].Add(weapon.GetDmg(id).ToString());
    _lists[i].Add(weapon.GetSpeed(id).ToString()); 
    _lists[i].Add(weapon.GetCost(id).ToString());
    weapons.Add(listname, _lists[i]);
}

PS这是什么Random.Range?是某种扩展方法吗?无论如何,在如此小的间隔内基于随机值生成 id 似乎是危险的。为什么不简单使用i.ToString()


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