 /**//// <summary>
/// 将跟踪信息记录到Win2000/NT事件日志中
/// <param name="message">需要记录的文本信息</param>
/// </summary>
public static void WriteTrace(String message)
 {
WriteLog(TraceLevel.Verbose, message);
}

 /**//// <summary>
/// 格式化记录到事件日志的文本信息格式
/// <param name="ex">需要格式化的异常对象</param>
/// <param name="catchInfo">异常信息标题字符串.</param>
/// <retvalue>
/// <para>格式后的异常信息字符串,包括异常内容和跟踪堆栈.</para>
/// </retvalue>
/// </summary>
public static String FormatException(Exception ex, String catchInfo)
 {
StringBuilder strBuilder = new StringBuilder();
if (catchInfo != String.Empty)
 {
strBuilder.Append(catchInfo).Append("\r\n");
}
strBuilder.Append(ex.Message).Append("\r\n").Append(ex.StackTrace);
return strBuilder.ToString();
}

 /**//// <summary>
/// 实际事件日志写入方法
/// <param name="level">要记录信息的级别(error,warning,info,trace).</param>
/// <param name="messageText">要记录的文本.</param>
/// </summary>
private static void WriteLog(TraceLevel level, String messageText)
 {
try
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