Question

我正在构建一个程序，用于阅读同一文本文件中的足球联赛和灯具，其中legue信息是前32行，灯具是文档的其余部分。无论如何，当我运行程序并尝试仅在列表框中获取联盟信息（名称，赞助商等）时，我会从整个文本中获得随机代码行。知道如何解决这个问题只有前32行出现了吗？

 public partial class frmLeaguesAndFixtures : Form
 {
    public static frmLeagues frmkeepLeagues = null;
    ArrayList leaguesArray = new ArrayList();
    public static string inputDataFile = @"E:\Soft130\CW\SOFT130GroupAssignment\SOFT130GroupAssignment\Assignment\bin\Debug\football.txt";
    const int numLeagueItems = 8;

    public frmLeaguesAndFixtures()
    {
        InitializeComponent();
    }

    private bool fileOpenForReadOK(string readFile, ref StreamReader dataIn)
    {
        try
        {
            dataIn = new StreamReader(readFile);
            return true;
        }
        catch (FileNotFoundException notFound)
        {
            MessageBox.Show("ERROR Opening file (when reading data in) - File could not be found.\n"
                                                            + notFound.Message);
            return false;
        }
        catch (Exception e)
        {
            MessageBox.Show("ERROR Opening File (when reading data in)- Operation failed.\n"
                                                            + e.Message);
            return false;
        }
    }

     public static bool getNextLeague(int numItems, StreamReader inNext, string[] nextLeagueData)
     {
        //locals
        string nextLine;
        int numDataItems = numItems;

        //read nextdata - based on constant numDataItems
        for (int i = 0; i < numDataItems; i++)
        {
            try
            {
                nextLine = inNext.ReadLine();
                if (nextLine != null)
                    nextLeagueData[i] = nextLine;
                else
                {
                    return false; //no more full data to process 
                }
            }
            catch (Exception e)
            {
                System.Windows.Forms.MessageBox.Show("ERROR Reading from file. Incomplete Data.\n" + e.Message);
                return false; //problem - could not read file
            }
        }
        return true;//no problems 
    }

    private void readLeague()
    {
       string inLeagueName, string inLeagueSponsor, int inLeaguePrize, int inLeagueNumFixtures)

        //local variables
        StreamReader inLeague = null;
        Leagues tempLeague;
        bool anyMoreLeagues = false;
        string[] leagueData = new string[numLeagueItems];

        //if file opened ok proceed
        if (fileOpenForReadOK(inputDataFile, ref inLeague))
        {
         //read first league     
         anyMoreLeagues = getNextLeague(numLeagueItems,inLeague, leagueData);

            //loop for all FULL league   in file
            while (anyMoreLeagues == true)
            {
                //create new league
                tempLeague = new Leagues(leagueData[0], leagueData[1], leagueData[2], leagueData[3]);

                //store in array
                leaguesArray.Add(tempLeague);

                //DOESNT WORK CORRECTLY TRY IT USING "PREMIERSHIP"
                // if (leagueData[0] == "The Championship")
                    {
                        foreach (Leagues l in leaguesArray)
                        {
                            lstLeagueInfo.Items.Add(l.getLeagueName() + " " + l.getLeagueSponsor() + " " + l.getLeaguePrize() + " " + l.getLeagueNumFixtures());
                        }
                    }

                    //read next data
                    anyMoreLeagues = getNextLeague(numLeagueItems,inLeague, leagueData);

                } //end while - no more 
            }//end if file ok            
        }


    private void btnPremiership(object sender, EventArgs e)
    {
        readLeague();
    }
}

Answer 1

var top32Lines = File.ReadLines(filename).Take(32).ToList();

Answer 2

并使用它来获取其余的行。

var allLines = File.ReadeLines(filename).ToList();
var first32 = allLines.Take(32).ToList();
var rest = allLines.Skip(32).ToList();

我希望这会有所帮助

更新1：

要浏览这些行，请使用foreach。

//example
foreach(string line in first32)
{
    //do your work
}

Streamreader给了我似乎随机数据但不知道为什么

2 个答案: