将 IEnumerable<string> 转换为 Dictionary

Question

在将bool distinct 添加到方法Splitter 并检查distinct is true 代码是否损坏后。现在的查询不是字典，而是IEnumerable<string>，但应该是Dictionary<string, int>。怎么可能解决？

这是错误：

无法将类型“System.Collections.Generic.IEnumerable”隐式转换为“System.Collections.Generic.Dictionary”。存在显式转换（您是否缺少演员表？）

还有代码：

private Dictionary<string, int> Splitter(string[] file, bool distinct)
{
    var query = file
        .SelectMany(i => File.ReadLines(i)
        .SelectMany(line => line.Split(new[] {' '}, StringSplitOptions.RemoveEmptyEntries))
        .AsParallel()
        .Select(word => word.ToLower())
        .Where(word => !StopWords.Contains(word))
        .Where(word => !StopWordsPl.Contains(word))
        .Where(word => !PopulatNetworkWords.Contains(word))
        .Where(word => !word.All(char.IsDigit)));
        if (distinct)
        {
        query = query.Distinct();
        }

       query.GroupBy(word => word)
            .ToDictionary(g => g.Key, g => g.Count());
       return query;
}

Answer 1

ToDictionary 返回您需要的内容。只需返回，而不是返回 query。

return query.GroupBy(word => word)
            .ToDictionary(g => g.Key, g => g.Count());