CODEWITHSUNDEEP
vb.net
Mental
Mental

Reputation: 11

Create a text file with date and time as the filename

I'm trying to create a text file with Visual Studio in VB.Net, and I want the filename to be the current date and time.

I have this code:

Dim d As System.DateTime
DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss")
Dim filepath As String = d + ".txt"
If Not System.IO.File.Exists(filepath) Then
    System.IO.File.Create(filepath).Dispose()
End If

But every time I use d it gives me the System.NotSupportedException error. I can only create a text file by specifying the filename. How can i fix it and make my text file's name the current date and time?

Upvotes: 0

Views: 3708

Answers (2)

Blackwood
Blackwood

Reputation: 4534

Your code fails to assign a value to the variable called d. Also, you want d to be a string, not a DateTime. Finally, the / and : characters in from your date and time are not valid in a windows filename. Either remove them or replace them with valid characters. Replace your first three lines of code with:

Dim d As String = DateTime.Now.ToString("yyyy-MM-dd HH-mm-ss")
Dim filepath As String = d & ".txt"

Upvotes: 2

Aquil Mirza
Aquil Mirza

Reputation: 31

You are trying with '/' and ':' in file name, while creating file this special characters not allowed. 

Dim dateString = DateTime.Now.ToString("yyyyMMdd_HH_mm_ss")
Dim filepath As String = dateString + ".txt"
If Not System.IO.File.Exists(filepath) Then
System.IO.File.Create(filepath).Dispose()
End If

Upvotes: 1

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