字典词典失去了它的价值

Question

        Dictionary<string, string> f = new Dictionary<string, string>();
        Dictionary<int, Dictionary<string, string>> lines = new Dictionary<int, Dictionary<string, string>>();

        while ((line = sr.ReadLine()) != null)
        {
            lineArr = line.Split(',');
            int x = 0;
            foreach (string field in lineArr)
            {
                f.Add(keys[x], field);
                x++;
            }
            lines.Add(lineIndex, f);
            f.Clear();
            lineIndex++;

字典f是临时的,我想将其值存储在另一个字典中,但是一旦我清除()它,字典行中的值就会丢失,我猜它会提供某种引用.不知道怎么解决这个问题？

Answer 1

移动f循环内部的声明.然后你不必每次都清空它,引用保持不变:

Dictionary<int, Dictionary<string, string>> lines = new Dictionary<int, Dictionary<string, string>>();

while ((line = sr.ReadLine()) != null)
{
    Dictionary<string, string> f = new Dictionary<string, string>();

    lineArr = line.Split(',');
    int x = 0;
    foreach (string field in lineArr)
    {
        f.Add(keys[x], field);
        x++;
    }
    lines.Add(lineIndex, f);

    lineIndex++;