date time in VB.NET Forms

Question

i want to save Chart image to my computer and Image name is ChartName+Date+Time Ex PieChart13jan20141127.JPEG

is any format for time and date can do that , because my format in my Code is return nothing my code is :

If My.Computer.FileSystem.DirectoryExists("C:\charts") Then
            Dim todaysdate As String = String.Format("{ddmmyyyy}", System.DateTime.Today)
            Chart1.SaveImage("C:\charts\PieChart" & todaysdate & ".Jpeg", System.Drawing.Imaging.ImageFormat.Jpeg)
            MessageBox.Show("Done")
        Else
            MsgBox("Please create Charts Folder @ C:\")
        End If

Answer 1

You can use DateTime.Now.ToString("ddMMMyyyyHHmm") (uppercase MMM for month)

Dim file As String = "PieChart" + DateTime.Now.ToString("ddMMMyyyyHHmm")
Dim fileName As String = String.Format("{0}{1}", file, ".Jpeg")
Dim fullName As String = System.IO.Path.Combine("C:\charts", fileName)

I prefer Path.Combine to build the path since it increases readability and is less error-prone.

Answer 2

To get the current date and time in a specific format use DateTime.Now.ToString(aFormat) where aFormat is a string of the format of date and time you require:

See here for all the formats available: http://msdn.microsoft.com/en-us/library/8kb3ddd4(v=vs.110).aspx