C#实现日志记录功能的完整方案

string filepath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Logs", "app_log.txt");

public static bool Exists (string? path);

public static System.IO.DirectoryInfo CreateDirectory (string path);

public static System.IO.StreamWriter CreateText (string path);

public static System.IO.StreamWriter AppendText (string path);

condition ? expression1 : expression2;

StreamWriter sw = File.Exists(filepath)? File.AppendText(filepath) : File.CreateText(filepath)

string logtype=string.Empty;
string s=string.Empty;
string content=string.Empty;
 content = $"[{DateTime.Now:yyyy-MM-dd HH:mm:ss.fff}] [{logtype}]:[{s}]\r\n";

button2.GetType().Name

public  class TraceLog
{
    public void writelog(string s,string logtype)
    {
        //判断是否文件是否存在，如果不存在，则创建文件
        //将信息和发生时间写入流中
        //关闭文件流对象

        string filepath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Logs", "app_log.txt");
        string content=string.Empty;
        try
        {
            // 确保目录存在
            string logDir = Path.GetDirectoryName(filepath);
            if (!Directory.Exists(logDir)) Directory.CreateDirectory(logDir);

            // using自动管理流的生命周期（退出using块自动释放）
            // File.AppendText：等价于 FileMode.Append + Encoding.UTF8
            using (StreamWriter sw = File.Exists(filepath)
                ? File.AppendText(filepath)
                : File.CreateText(filepath))
            {
                // 写入时间+信息
                //string content = $"[{DateTime.Now:yyyy-MM-dd HH:mm:ss.fff}] 操作信息：用户执行了XXX操作\r\n";
                 content = $"[{DateTime.Now:yyyy-MM-dd HH:mm:ss.fff}] [{logtype}]:[{s}]\r\n";
                sw.WriteLine(content);
            }
        }
        catch
        {
            MessageBox.Show($"日志写入失败:{content}","错误",MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
    }
}

TraceLog App_log=new TraceLog();
private void button1_Click(object sender, EventArgs e)
{
    string CtrType = GetType().Name + "-" + button1.GetType().Name;
    App_log.writelog(button1.Tag.ToString(), CtrType);
}

private void button2_Click(object sender, EventArgs e)
{
    string CtrType = GetType().Name + "-" + button2.GetType().Name;
    App_log.writelog(button2.Tag.ToString(), CtrType);
}

private void textBox1_KeyDown(object sender, KeyEventArgs e)
{
    if(e.KeyValue==13)
    {
        string CtrType = GetType().Name +"-"+ textBox1.GetType().Name;
        App_log.writelog(textBox1.Tag.ToString(), CtrType);
    }
}

private void textBox2_KeyPress(object sender, KeyPressEventArgs e)
{
    if (e.KeyChar == 13)
    {
        string CtrType = GetType().Name+ "-" + textBox2.GetType().Name;
        App_log.writelog(textBox2.Tag.ToString(), CtrType);
    }
}