CODEWITHSUNDEEP
c#
Lennie
Lennie

Reputation:

Check If File Created Within Last X Hours

How can I check if a file has been created in the last x hours? like 23 hours etc. Using C# 3.0.

Note: This must also work if I create the file now, then the file will be seconds old not an hour old yet.

Upvotes: 12

Views: 14960

Answers (5)

Robin Day
Robin Day

Reputation: 102478

Something like this...

        FileInfo fileInfo = new FileInfo(@"C:\MyFile.txt");
        bool myCheck = fileinfo.CreationTime > DateTime.Now.AddHours(-23);

Upvotes: 12

James
James

Reputation: 82096

Use:

System.IO.File.GetCreationTime(filename);

To get the creation time of the file, see GetCreationTime for more details and examples.

Then you can do something like:

public bool IsBelowThreshold(string filename, int hours)
{
     var threshold = DateTime.Now.AddHours(-hours);
     return System.IO.File.GetCreationTime(filename) <= threshold;
}

Upvotes: 12

Fredrik M&#246;rk
Fredrik M&#246;rk

Reputation: 158309

You can use File.GetCreationTime and compare to the current time:

private static bool IsFileOlder(string fileName, TimeSpan thresholdAge)
{
    return (DateTime.Now - File.GetCreationTime(fileName)) > thresholdAge;
}

// used like so:
// check if file is older than 23 hours
bool oldEnough = IsFileOlder(@"C:\path\file.ext", new TimeSpan(0, 23, 0, 0));
// check if file is older than 23 milliseconds
bool oldEnough = IsFileOlder(@"C:\path\file.ext", new TimeSpan(0, 0, 0, 0, 23));

Upvotes: 7

bruno conde
bruno conde

Reputation: 48265

Use FileInfo class and the CreationTime property.

FileInfo fi = new FileInfo(@"C:\myfile.txt");
bool check = (DateTime.Now - fi.CreationTime).TotalHours < 23;

Upvotes: 2

M4N
M4N

Reputation: 96551

    FileInfo fi = new FileInfo("c:\\file.txt");
    if (fi.CreationTime.AddHours(23) >= DateTime.Now)
    {
        //created within the last 23 hours
    }

Upvotes: 1

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