c# - 如何使用公共(public)字符串填充文本框？

Question

我有一个似乎无法解决的令人沮丧的问题。

我尝试用来自公共(public)静态字符串的文本填充 TextBox。但是当我运行该程序时，它只显示一个空白文本框，其中什么也没有。

我没有任何错误，所以我很难理解我做错了什么。

这是我的代码:

public ShowMp3()
{
    InitializeComponent();
    OverzichttxtBox.Text = OverzichtMP3();
}

public static String OverzichtMP3()
{
    String overzicht = "";

    foreach (Mp3Player player in Mp3.GetPlayers())
        overzicht = overzicht + "ID: " + Convert.ToString(player.id) + "\r\n" +
                    "Merk: " + player.make + "\r\n" + "Model: " + player.model +
                    "\r\n" + "MB-size: " + player.mBSize + "\r\n" + "Prijs: " +
                    player.price + "\r\n" + "\r\n";

    return overzicht;
}

Mp3.GetPlayers() 是这样的:

private static ArrayList players = new ArrayList();

public static void Initialize()
{
    Mp3Player player1 = new Mp3Player(1, "GET Technologies .inc", "HF 410", 4096, 129.95M, 500);
    Mp3Player player2 = new Mp3Player(2, "Far & Loud", "XM 600", 8192, 224.95M, 500);
    Mp3Player player3 = new Mp3Player(3, "Innotivative ", "Z3", 512, 79.95M, 500);
    Mp3Player player4 = new Mp3Player(4, "Resistance S.A.", "3001", 4096, 124.95M, 500);
    Mp3Player player5 = new Mp3Player(5, "CBA", "NXT Volume", 2048, 159.05M, 500);

    players.Add(player1);
    players.Add(player2);
    players.Add(player3);
    players.Add(player4);
    players.Add(player5);
}

public static ArrayList GetPlayers()
{
    return players;
}

Answer 1

我怀疑问题是你从来没有调用 Mp3.Initialize() .您可以将其添加到 Mp3 中的静态构造函数中类:

private static List<Mp3Player> players = new List<Mp3Player>();

static Mp3() 
{
    Initialize();
}

// This can be private now...
private static void Initialize()
{
     ....

请注意，您可能想要更改 ArrayList到 List<Mp3Player> ，还有。