将文件创建时间转换为格式"dd/MM/yyyy HH:mm:ss" [英] Convert File Creation Time to format "dd/MM/yyyy HH:mm:ss"

问题描述

对于以下代码，我不断收到错误消息字符串未被识别为ValidDateTime"

I keep on getting the error "string is not recognized as ValidDateTime" for the below code

foreach (FileInfo FI in FileList)
                    {
                        DateTime filedat = FI.CreationTime.Date;
                        DateTime filedate = Convert.ToDateTime(filedat);
                        string fidate = filedate.ToString(format) ;
                        DateTimePicker filedatepkr = new DateTimePicker();
                        //filedatepkr.CustomFormat = "dd/MM/yyyy";
                        filedatepkr.Text =Convert.ToString(fidate) ;
                        
                       if (DateTime.Compare(filedate, frmdate) >= 0 && (DateTime.Compare(filedate, todate )<= 0))
                        {
                        }
                        DateTime FileCreatDt = File.GetCreationTime(FI.Name);
                    }

请帮助！

Please Help!!

推荐答案

使用字符串的整个想法是错误的！类DateTimePicker公开类型为DateTime的属性Value.在此类型上，定义比较运算符，然后使用它们.比较时间值，而不是字符串！

The whole idea working with strings is wrong! The class DateTimePicker expose the property Value of the type DateTime. On this type comparison operators are defined, use them. Compare time values, not strings!

DateTimePicker filedatepkr = new DateTimePicker();
...
foreach (FileInfo FI in FileList)
{
    DateTime filedat = FI.CreationTime.Date;
    DateTime filedate = Convert.ToDateTime(filedat);
    if (filedate > filedatepkr) { /* whatever...  */ }
}

—SA

—SA

DateTime filedate = Convert.ToDateTime(filedat);
在这里，您将datetime转换为不需要的datetime.

检查此

DateTime filedate = Convert.ToDateTime(filedat);
Here you are converting datetime to again datetime which is not needed.

check this

filedatepkr.Text = DateTime.ParseExact(fidate, "dd/MM/yyyy",null);

我认为这些代码有些混乱，

I think these code something confused ,

foreach (FileInfo FI in FileList)
                    {
                        DateTime filedat = FI.CreationTime.Date;
                        DateTime filedate = Convert.ToDateTime(filedat);
                        string fidate = filedate.ToString(format) ;
                        DateTimePicker filedatepkr = new DateTimePicker();
                        //filedatepkr.CustomFormat = "dd/MM/yyyy";
                        filedatepkr.Text =Convert.ToString(fidate) ;

因此，我想建议以下代码

So i want to suggest ,following code

foreach (string F in FileList)
           {

               DateTime filedat = FI.CreationTime.Date;
               DateTime filedate = Convert.ToDateTime(filedat);
               string fidate = filedate.ToString(format);
               DateTimePicker filedatepkr = new DateTimePicker();
               //filedatepkr.CustomFormat = "dd/MM/yyyy";
               filedatepkr.Value = DateTime.Parse(fidate)

可能会有帮助
Theingi Win

It may be helpful
Theingi Win

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