Hi, I have a text file at C:\Windows\Demo.txt Would like to append the time stamp at the end of the text file with conditions that if file is currently in use by another process, skip the append operation and if it's available append it immediately and close the file. Is it possible /supported in VB.Net?

For example, you can do this: Try File.AppendAllText("C:\Windows\Demo.txt", DateTime.Now.ToString() & Environment.NewLine) Catch exc As IOException When exc.HResult = &H80070020 ' ignore End Try Make sure that you have rights to write to Windows directory.

Append Time Stamp to Text File VB.Net

Accepted answer

Viorel 112.1K Reputation points

2022-09-07T10:57:46.213+00:00
For example, you can do this:

Try File.AppendAllText("C:\Windows\Demo.txt", DateTime.Now.ToString() & Environment.NewLine) Catch exc As IOException When exc.HResult = &H80070020 ' ignore End Try

Make sure that you have rights to write to Windows directory.
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1 person found this answer helpful.
~OSD~ 2,126 Reputation points

2022-09-07T13:31:22.49+00:00

Perfect, this did exactly what I was looking for.
Will it show any error message /warning etc. in case file is not writeable or busy or used by another process.?

Viorel 112.1K Reputation points

2022-09-07T13:44:26.747+00:00

It only ignores the "used by another process" situation. To ignore more errors, you can remove the 'When ...' part from the code, or add more catch blocks for specific errors.

~OSD~ 2,126 Reputation points

2022-09-07T14:20:23.007+00:00

You mean like this:?

Try
File.AppendAllText("C:\Windows\Demo.txt", DateTime.Now.ToString() & Environment.NewLine)
Catch exc As IOException
' ignore
End Try

Viorel 112.1K Reputation points

2022-09-07T15:59:39.287+00:00

Yes, this will ignore many types of problems.

~OSD~ 2,126 Reputation points

2022-09-07T19:26:19.987+00:00

Thanks.
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Append Time Stamp to Text File VB.Net

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