无法从'void'转换为'System.Collections.Generic.List <string> C#

时间:2018-11-10 11:12:31

标签: c# arrays list dictionary return

我正在尝试将以下代码中的每个循环的新列表添加到字典中,但是我目前正遇到以下错误:

  

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
    }
}}

由于在某些方面确实缺少我的编码技能,因此我认为对语言有更好了解的人可以为我提供帮助。非常感谢您的帮助!

1 个答案:

答案 0 :(得分:1)

欢迎您!

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,则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]);
}

P.S。 Random.Range是什么?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似乎很危险。为什么不简单使用i.ToString()