c# 将锯齿状数组复制到字符串

Question

我的函数应该用“&”“;”分割一个字符串和 ","并返回一个三重锯齿状数组，反之亦然。 (来自数据如:1,2,3;4,5,6&1,2,3;4,5,6)

我一直在努力让它工作，现在由于某种原因我在

上遇到了 system.argumentnullexception

Array.Copy(playerOneEnts, allEnts[0], playerOneEnts.Length);
Array.Copy(playerTwoEnts, allEnts[1], playerTwoEnts.Length);

完整代码:

public string convertToString(string[][][] allEnts)
{
    string Player = string.Empty;
    string[][] playerOneEnts = new string[maxEnts][];
    string[][] playerTwoEnts = new string[maxEnts][];

    Array.Copy(allEnts[0], playerOneEnts, allEnts[0].Length);
    Array.Copy(allEnts[1], playerTwoEnts, allEnts[1].Length);

    for (int j = 0; j < playerOneEnts.Length; j++)
    {
        for (int i = 0; i < playerOneEnts[j].Length; i++)
        {
            Player += playerOneEnts[j][i] + ",";
        }

        Player = Player.TrimEnd(',');
        Player += ";";
    }

    Player = Player.TrimEnd(';');
    Player += "&";

    for (int j = 0; j < playerTwoEnts.Length; j++)
    {
        for (int i = 0; i < playerTwoEnts[j].Length; i++)
        {
            Player += playerTwoEnts[j][i] + ",";
        }

        Player = Player.TrimEnd(',');
        Player += ";";
    }

    Player = Player.TrimEnd(';');
    return Player;
}

public string[][][] convertToArray(string ents)
{
    string[] p = new string[2];
    string[][] playerOneEnts = new string[maxEnts][];
    string[][] playerTwoEnts = new string[maxEnts][];
    string[][][] allEnts = new string[2][][];

    p = ents.Split('&');

    try
    {
        playerOneEnts = p[0].Split(new[] { ";" }, StringSplitOptions.RemoveEmptyEntries).Select(chunk => chunk.Split(',')).ToArray();
        playerTwoEnts = p[1].Split(new[] { ";" }, StringSplitOptions.RemoveEmptyEntries).Select(chunk => chunk.Split(',')).ToArray();

        MessageBox.Show(playerOneEnts.Length.ToString());

        Array.Copy(playerOneEnts, allEnts[0], playerOneEnts.Length);
        Array.Copy(playerTwoEnts, allEnts[1], playerTwoEnts.Length);
    }
    catch
    {
        MessageBox.Show("unable to convert string", "Fatal Error");
    }

    return allEnts;
}

代码对我来说就像一场灾难，如果有人知道将其转换为字符串的更好方法，我会很高兴提出任何想法。摆脱我的错误已经足够帮助我了。

谢谢!

Answer 1

这是使用 Linq 的示例(需要 .Net 4.0):

var source = "1,2,3;4,5,6&1,2,3;4,5,6";

string[][][] decoded = source.Split('&').Select(x => x.Split(';').Select(y => y.Split(',').ToArray()).ToArray()).ToArray();

string reencoded = String.Join("&", decoded.Select(x => String.Join(";", x.Select(y => String.Join(",", y)))));

或者，可以使用 IEnumarable 泛型来避免转换为数组。

警告:此代码不验证输入，例如数组长度。

编辑: .NET 3.5 重新编码:

var reencoded = String.Join("&", decoded.Select(x => String.Join(";", x.Select(y => String.Join(",", y)).ToArray())).ToArray());