How to convert 12H format to 24H format

Question

I would like to convert 12H to 24H format.
I have for example: 06:11:11 PM and I need to convert it so I can see 18:11:11 in VB.net.
Please help me here.

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V. A.

Answer 1

I would like to convert 12H to 24H format.
I have for example: 06:11:11 PM and I need to convert it so I can see 18:11:11 in VB.net.
Please help me here.

---

V. A.

Hi,

Add one button and one large-ish RichTextBox to a FORM and run this please.

This will show you all the possible DATE or TIME or Date and Time formats.  :-)


The MessageBox will show the time in 24 Hr format if you use.>>

        Dim twentyFourHour As String = Now.Hour.ToString("00") & ":" & Now.Minute.ToString("00") & ":" & Now.Second.ToString("00")

        MessageBox.Show(twentyFourHour)

Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        Dim myDateTime As DateTime = Now

        Dim formatStrings() As String = myDateTime.GetDateTimeFormats

        Dim sb As New System.Text.StringBuilder
        For index As Integer = 0 To formatStrings.GetUpperBound(0)
            sb.Append(formatStrings(index) & System.Environment.NewLine)
        Next

        RichTextBox1.Text = sb.ToString

        Dim twentyFourHour As String = Now.Hour.ToString("00") & ":" & Now.Minute.ToString("00") & ":" & Now.Second.ToString("00")

        MessageBox.Show(twentyFourHour)

    End Sub
End Class

Regards,

John

Answer 2

If it is between 1pm and 12am...add 12hours to the hour. If it is 12:00 - 12:59 AM, subtract 12, or just set the hour to 0. From 1am - 1159am, do nothing.

The only time you need to do anything is the two conditions I just mentioned.

Answer 3

just saw this one, and it's already answered, but I thought I'd add this:

            '24 hr clock
            Label2.Text = Format(Now(), "HH:mm:ss")

            'AM/PM clock
            Label2.Text = Format(Now(), "h:mm:ss tt")

Answer 4

Hi Joe,

I thought I'd seen that on these forums before but it was ages ago!!  :-D


Regards,

John