是否有可能有多個控制按鈕。標籤

Question

此應用程序提示您打開一個文件夾。該應用程序然後查看文件夾中的所有文件併爲每個（.wav）文件生成一個按鈕。然後，我打算在按下按鈕時播放（.wav）文件。

因爲它是我動態創建按鈕。我使用button.Tag發送按鈕號碼，但是我希望發送另一個保存wav文件完整路徑的對象。然而，我已經僞加了它，我知道你不能像我所做的那樣添加兩個button.Tag。所以我的問題是如何實現這一點。

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

我推薦一個專門的對象在Tag屬性來存儲：

class WaveDetailTag { 

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

} 

實現：

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

更新
使用switch-case：

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; 
     } 
    } 

Answer 2

多個標籤是不是真的有可能，但你可以使用一個List（List<object>或List<MyType>）或數組作爲Tag。

你也可以創建自己的類包含所有想要的信息，這將是可取的：

class MyTagInfo 
{ 
    public int Num; 
    public string Text; 
    public bool SomeMoreInfo; 
} 

與用法：

myControl.Tag = new MyTagInfo { Num = 0, Text = "Hello World!" }; 

Answer 3

您可以將列表存儲到標籤屬性，允許您在其中存儲多個對象。

button.Tag = new List<object>(); 
(List<object> button.Tag).Add(btnCount); 
(List<object> button.Tag).Add(soundfilepath);