填充字符串数组

问题描述

在下面的代码中，字符串数组fileNames填充有目录中的文件.
该目录每天都有文件.即FileAxxx.csv，其中xxx表示YYYYmmdd
问题:
如何仅用今天的文件填充此字符串数组?
谢谢

String [] fileNames;

//填充fileNames字符串数组...

ArrayList fileNamesArray = new ArrayList(fileNames);

Hi,
In the code below the string array fileNames is populated with files from a directory.
The directory has files for each day. i.e. FileAxxx.csv where xxx refers to YYYYmmdd
Question:
How can this string array be populated only with files for today''s date?
Thanks

String[] fileNames;

//populate fileNames string array...

ArrayList fileNamesArray = new ArrayList(fileNames);

推荐答案

var query = from file in fileNames
            where (new FileInfo(file)).LastWriteTime.Date == DateTime.Now.Date
            select file;
fileNames = query.ToArray<string>();

谢谢您的答复，但我忘记说出于项目原因我不想使用LINQ."


然后尝试:

"Hi, Thanks for the reply But I forgot to say that I do not want to use LINQ for project reasons."


Then try:

List<string> todayFiles = new List<string>();
foreach (string file in files)
    {
    if ((new FileInfo(file)).LastWriteTime.Date == DateTime.Now.Date)
        {
        todayFiles.Add(file);
        }
    }
files = todayFiles.ToArray<string>();

string[] fileNames = {"abcdef20120216.csv","ijklmn20120215.csv","pqrst20120216.csv"};
DateTime today = DateTime.Now;
string searchDate =
	string.Format("{0:0000}{1:00}{2:00}.csv",today.Year,today.Month,today.Day);
ArrayList fileNamesArray = new ArrayList();
foreach(string fileName in fileNames){
	if (fileName.EndsWith(searchDate))
		fileNamesArray.Add(fileName);
}

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PES

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PES

string[] name = Directory.GetFiles("<path>", "*" + DateTime.Now.ToString("yyyyMMdd") + ".csv");</path>

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