How to change date and time format while saving it in file

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# Am getting an error as FormatException was unhandled in the second line of code
here is my code:

VB

Private Sub HL_Click(sender As Object, e As EventArgs) Handles HL.Click
        TxtDob.Text = Date.Now.ToString("ddMMyyyy")
        Dim file As System.IO.StreamWriter
        Dim fileDateTime As String = DateTime.Now.ToString("yyyyMMdd") & "_" & DateTime.Now.ToString("HHmmss")
        file = My.Computer.FileSystem.OpenTextFileWriter(fileDateTime, True)
            file.WriteLine("MSH|^~\&|||||" & TxtExamtime.Text & "||ORM^O01||P|2.3.1")
            file.WriteLine("PID|||" & TxtId.Text & "||" & TxtFamilyname.Text & "^" & TxtGivenname.Text & "||" & TxtDob.Text & "||" & TxtGender.Text & "|||" & TxtStreet.Text & " " & TxtHouse.Text & "^^" & TxtCity.Text & "^^" & TxtPostcode.Text)
            file.WriteLine("PV1||O|||||||||||||||||" & TxtId.Text & "|||||||||||||||||||||||||" & TxtExamdate.Text)
            file.WriteLine("ORC|NW|" & TxtId.Text & "|||||^^^" & TxtExamdate.Text & "||" & TxtExamdate.Text)
            file.WriteLine("OBR||" & TxtExamdate.Text & TxtExamdate.Text & "||CT|||" & TxtExamtime.Text & "|" & TxtExamtime.Text)
            file.WriteLine()

        file.Close()
        MessageBox.Show("Textsaved to " & fileDateTime)
    End Sub

Posted 26-May-15 4:13am

Shaik Izaz

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Comments

ZurdoDev 26-May-15 10:26am

It should be DateTime.Now, not Date.Now, right?

Shaik Izaz 26-May-15 10:30am

I tried DateTime.Now also its giving the same error

ZurdoDev 26-May-15 10:32am

DateTime.Now.ToString("ddMMyyyy") is perfectly valid. Are you sure that's the line giving you the error?

Shaik Izaz 26-May-15 10:37am

yeah,Its on the same line. Is there any other method to save the DATE as 18091989 instead of 18 SEP 1989

ZurdoDev 26-May-15 10:42am

What version of .net is your project target set to?
Also, what's the full error message?

Shaik Izaz 26-May-15 10:50am

Visual studio 2013 and
the error message is: "An unhandled exception of type 'System.FormatException' occurred in mscorlib.dll

Additional information: String was not recognized as a valid DateTime."

CHill60 26-May-15 10:52am

There is nothing wrong with the code you have presented here - setting TxtDob to today's date seems a little strange - have you changed the code from the version that is causing the error?

Shaik Izaz 27-May-15 3:59am

Actually i want to save the DOB as 18091989 instead of 18 sep 1989, But i dont know how to do that ?

ZurdoDev 26-May-15 10:58am

Then the error is pointing somewhere else. What you posted won't cause this error.

Shaik Izaz 27-May-15 4:00am

Actually i want to save the DOB as 18091989 instead of 18 sep 1989, But i dont know how to do that ?

ZurdoDev 27-May-15 8:04am

Yes you do. Just use the format ddMMyyyy. It's what you already have posted.

Look, you are not making any sense. 3 of us now have told you that the code you posted will not give you the error you are claiming. If you want us to help, you need to be clear and honest.

Shaik Izaz 27-May-15 8:39am

Yeah, i got it Thank you so much
this works fine:
TxtDob.Format = DateTimePickerFormat.Custom
TxtDob.CustomFormat = "ddMMyyyy"

Sergey Alexandrovich Kryukov 26-May-15 11:20am

No! It is not giving you the same error. Date.Now would not even compile. Please keep to the facts.
—SA

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ZurdoDev · Accepted Answer · 2015-05-27T02:59:00

Solution 2

As discussed in the comments, you were able to get it to work with the following code:

VB

TxtDob.Format = DateTimePickerFormat.Custom
TxtDob.CustomFormat = "ddMMyyyy"

Posted 27-May-15 2:59am

ZurdoDev