C# ListBox 打印日志

LvLogHelper.GetInstance(this.lbLog).PrintLog("初始化程序完成");
LvLogHelper.GetInstance().PrintLog("请连接综测仪表");
LvLogHelper.GetInstance().PrintLog("请加载测试用例");

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using System; using System.IO; using System.Runtime.CompilerServices; using System.Windows.Forms; [assembly: SuppressIldasmAttribute()]   namespace LogHelper {     public class LvLogHelper     {         private ListBox LogBox;         private LvLogHelper(ListBox logbox)         {             this.LogBox = logbox;         }           //定义一个用于保存静态变量的实例         private static LvLogHelper instance = null;         //定义一个保证线程同步的标识         private static readonly object locker = new object();         //构造函数为私有，使外界不能创建该类的实例         private LvLogHelper() { }           public static LvLogHelper GetInstance(ListBox lb)         {             if (instance == null)             {                 lock (locker)                 {                     if (instance == null) instance = new LvLogHelper(lb);                 }             }             return instance;         }         public static LvLogHelper GetInstance()         {             if (instance == null)             {                 lock (locker)                 {                     if (instance == null) instance = new LvLogHelper();                 }             }             return instance;         }           /// <summary>         /// 打印日志         /// </summary>         /// <param name="log">日志信息</param>         public void PrintLog(string log)         {             try             {                 string txt = string.Format("--- {0}.{1}.{2}  {3}:{4}:{5}    :   ",                     DateTime.Now.Year, DateTime.Now.Month,                     DateTime.Now.Day, DateTime.Now.Hour,                     DateTime.Now.Minute, DateTime.Now.Second);                 log = log.Trim();                 string txts = txt + log + "\r\n";                   LogBox.Items.Add(txts);                 LogBox.SelectedItem = txts;             }             catch { }         }         /// <summary>         /// 打印日志(测试结果)         /// </summary>         /// <param name="log">日志</param>         /// <param name="result">结果，例如pass或fail</param>         public void PrintLog(string log, string result)         {             try             {                 string txt = string.Format("--- {0}.{1}.{2}  {3}:{4}:{5}    :   ",                     DateTime.Now.Year, DateTime.Now.Month,                     DateTime.Now.Day, DateTime.Now.Hour,                     DateTime.Now.Minute, DateTime.Now.Second);                 log = log.Trim();                 string txts = txt + log + "  -  " + result + "\r\n";                   LogBox.Items.Add(txts);                 LogBox.SelectedItem = txts;             }             catch { }         }         /// <summary>         /// 打印日志(测试结果)         /// </summary>         /// <param name="log">日志</param>         /// <param name="reason">原因</param>         /// <param name="result">测试结果</param>         public void PrintLog(string log, string reason, string result)         {             try             {                 string txt = string.Format("--- {0}.{1}.{2}  {3}:{4}:{5}    :   ",                     DateTime.Now.Year, DateTime.Now.Month,                     DateTime.Now.Day, DateTime.Now.Hour,                     DateTime.Now.Minute, DateTime.Now.Second);                 log = log.Trim();                 string txts = txt + log + "  -  " + reason + " > " + result + "\r\n";                 LogBox.Items.Add(txts);                 LogBox.SelectedItem = txts;             }             catch { }         }           public void SaveLogToFile(string path, ListBox lbbox)         {             if (File.Exists(path)) File.Delete(path);             FileStream fs = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write);             StreamWriter swLog = new StreamWriter(fs);             swLog.Flush();             swLog.BaseStream.Seek(0, SeekOrigin.End);// 使用StreamWriter来往文件中写入内容             try             {                 foreach (string log in lbbox.Items)                 {                     swLog.Write(log);                 }             }             catch             {                 swLog.Close();             }             finally             {                 swLog.Flush();                 swLog.Close();             }         }       } }