c# - 是否可以有多个控制button.Tag

Question

此应用会提示您打开一个文件夹。该应用程序然后查看文件夹中的所有文件并为每个 (.wav) 文件生成一个按钮。我的意图是在按下按钮时播放 (.wav) 文件。

我正在动态创建按钮。我使用 button.Tag 发送按钮编号，但我希望发送另一个包含 wav 文件完整路径的对象。我已经伪添加了它，但是我知道你不能像我一样添加两个 button.Tag。所以我的问题是如何实现它。

public partial class Form1 : Form
{
    public SoundPlayer Sound1;
    public static int btnCount = 0;

    public Form1()
    {
        InitializeComponent();
        SetFolderPath();
    }

    private void Form1_Load(object sender, EventArgs e)
    {

    }

    public void addDynamicButton(string folder, string fileName)
    {
        btnCount++;
        string soundfilepath = folder + "\\" + fileName + ".wav";

        Button button = new Button();
        button.Location = new Point(20, 30 * btnCount + 10);
        button.Size = new Size(300, 23);

        button.Text = fileName;
        button.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
        button.UseVisualStyleBackColor = true;

        button.Click += new EventHandler(btnDynClickEvent);
        button.Tag = btnCount;
        button.Tag = soundfilepath;
        this.Controls.Add(button);

    }

    void btnDynClickEvent(object sender, EventArgs e)
    {
        Button button = sender as Button;
        if (button != null)
        {

            switch ((int)button.Tag)
            {
                case 1:
                    Sound1 = new SoundPlayer((string)button.Tag);
                Sound1.Play();
                break;

            }
        }
    }

    public void SetFolderPath()
    {

        FolderBrowserDialog folder = new FolderBrowserDialog();

        folder.Description = "Select the sound file Folder";

        if (textBox1.Text.Length > 2)
        {
            folder.SelectedPath = textBox1.Text;
        }

        else
        {
            folder.SelectedPath = @"C:\";
        }

        if (folder.ShowDialog() == DialogResult.OK)
        {
            textBox1.Text = folder.SelectedPath;

            string[] files = Directory.GetFiles(folder.SelectedPath, "*.wav", SearchOption.AllDirectories);
            int count = files.Length;

            richTextBox1.Text = count.ToString() + " Files Found";

            foreach (string file in files)
            {
                string fileName = Path.GetFileNameWithoutExtension(file);
                addDynamicButton(folder.SelectedPath, fileName);
            }
        }
    }


    private void btnOpenFolder(object sender, EventArgs e)
    {
        SetFolderPath();
    }


}

Answer 1

我建议在 Tag 属性中存储一个专门的对象:

class WaveDetailTag {

    public FileInfo WaveFile {get; set;}
    public int ButtonId {get; set;}

}

实现:

// ...
button.Tag = new WaveDetailTag() { 
    WaveFile = new FileInfo(soundfilepath), 
    ButtonId = btnCount 
};
// ...

更新
在 switch-case 中使用:

    Button button = sender as Button;
    if (button != null)
    {
        var waveDetail = (WaveDetailTag)button.Tag;
        switch (waveDetail.ButtonId)
        {
            case 1:
                Sound1 = new SoundPlayer(waveDetail.WaveFile.FullName);
                Sound1.Play();
                break;
        }
    }