如何將CheckedListBox選擇發送到文本文件？

Question

我想第一次自己編碼，並決定在Winforms上製作音樂播放器。

我有一個已經填充了文件夾中的歌曲名稱的CheckedListBox。 當我點擊一個按鈕時，應該在關閉表單之前將所選歌曲的名稱發送到.txt文件以供進一步操作。

爲了簡化，我只是先選擇1首歌曲。

private void selectbtn_Click(object sender, EventArgs e) 
{ 
    selectedSongs = checkedListBox1.CheckedItems.ToString(); 
    songRecord.writeRecord(selectedSongs); //i initialised my streamreader/streamwriter class and called it songRecord 
    this.Close(); 
} 

在我streamreader/writer類，這是我

class DataRecord 
{ 
    public void writeRecord(string line) 
    { 
     StreamWriter sw = null; 
     try 
     { 
      sw = new StreamWriter(@"C:\Users\Me\Desktop\JAM_MACHINE\record.txt", true); 
      sw.WriteLine(line); 
     } 
     catch (FileNotFoundException) 
     { 
      Console.WriteLine("Error: File not found."); 
     } 
     catch (IOException) 
     { 
      Console.WriteLine("Error: IO"); 
     } 
     catch(Exception) 
     { 
      throw; 
     } 
     finally 
     { 
      if (sw != null) 
       sw.Close(); 
     } 
    } 

    public void readRecord() 
    { 
     StreamReader sr = null; 
     string myInputline; 
     try 
     { 
      sr = new StreamReader(@"C:\Users\Me\Desktop\JAM_MACHINE\record.txt"); 
      while ((myInputline = sr.ReadLine()) != null) ; //readline reads whole line 
      Console.WriteLine(myInputline); 
     } 
     catch (FileNotFoundException) 
     { 
      Console.WriteLine("Error: File not found"); 
     } 
     catch(IOException) 
     { 
      Console.WriteLine("Error: IO"); 
     } 
     catch (Exception) 
     { 
      throw; 
     } 
     finally 
     { 
      if (sr != null) 
       sr.Close(); 
     } 
    } 
} 

當我運行它，.txt文件沒有顯示我的選擇。它只顯示： System.Windows.Forms.CheckedListBox+CheckedItemCollection

出了什麼問題？

Answer 1

迭代CheckedItems集合並收集字符串數組中的每個項目。我假設你充滿字符串checkedListBox

private void selectbtn_Click(object sender, EventArgs e) 
    { 


     string[] checkedtitles = new string[checkedListBox1.CheckedItems.Count]; 
     for (int ii = 0; ii < checkedListBox1.CheckedItems.Count; ii++) 
     { 
      checkedtitles[ii] = checkedListBox1.CheckedItems[ii].ToString(); 
     } 
     string selectedSongs = String.Join(Environment.NewLine, checkedtitles); 

     songRecord.writeRecord(selectedSongs); 
     this.Close(); 

    }