Datetime.utc在事件查看器中返回1-1-0001 00:00:00

Question

我想将当前日期返回给事件记录器，我已经尝试过了：

public class LogDate
{
    protected DateTime localDate { get; set; }

    public LogDate()
    {
        localDate = DateTime.Now;

    }
}

。

public class Eventlog : LogDate
{
    public void logEvent(string answer)
    {

       this.localDate = new DateTime();


        try
        {
            string sSource;
            string sLog;
            string sEvent;

            sSource = "dotNET Sample App";
            sLog = "filmdatabase";
            sEvent = this.localDate + answer;

当我尝试这样做时，它以某种方式返回1-1-0001 00:00:00。 而不是实际时间。

Answer 1

您再次将this.localDate指定为新的DateTime ：

this.localDate = new DateTime();

1-1-0001 00:00:00是new DateTime()的默认值。 要修复此问题，请使用this.localDate而不用new DateTime()对其进行重新分配。

public class Eventlog : LogDate
{
    public void logEvent(string answer)
    {

       //this.localDate = new DateTime(); //remove this    

        try
        {
            string sSource;
            string sLog;
            string sEvent;

            sSource = "dotNET Sample App";
            sLog = "filmdatabase";
            sEvent = this.localDate.ToString() + " " + answer; //use it directly as you have initialized that in your constructor

直接使用它，因为您始终在构造函数中对其进行了初始化：

public class LogDate
{
    protected DateTime localDate { get; set; }

    public LogDate()
    {
        localDate = DateTime.Now;

    }
}

Answer 2

您将localDate设置为新的默认值

this.localDate = new DateTime();