Adavnced Email App
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  1. #1
    Join Date
    Oct 2013
    Posts
    2

    Question Adavnced Email App

    Hi all,

    I need to develop a small but rather advanced email app using vb.net
    Up to now everything has been going smoothly until my lecturer asked me to include pictures in the email
    I successfully managed to include the picture as attachment but he wanted the picture to be included in the email body itself and not as attachment
    Now for 1 image I managed to do it by converting the email into html format and sending it
    But now the real problem is when the user wishes to include several pictures in the email
    How am i to detect the number of pictures and rewrite the equivalent email html??
    I am using a richtextbox for the input of text and pictures

    What I managed to do up till now is as follows

    Code:
    Imports System.Net.Mail
    Imports System.Net.Mime
    
    Public Class Form1
        Dim picturePath As String
        Dim pictureExt As String
        Dim filePath As String = ""
    
        Private Sub btnSend_Click(sender As System.Object, e As System.EventArgs) Handles btnSend.Click
            Dim smtp As New SmtpClient
            Dim avHtml As AlternateView
            Dim mail As MailMessage = New MailMessage
            Dim htmlBody As String
            Dim pic1 As LinkedResource
            Dim x() As String
    
            x = txtBody.Text.Split(" ")
    
            smtp.UseDefaultCredentials = False
            smtp.Credentials = New Net.NetworkCredential("***************", "**************")
            smtp.Port = "25"
            smtp.EnableSsl = True
            smtp.Host = "***********"
    
            Try
                htmlBody = "<html> "
                htmlBody = htmlBody & "<body> "
    
                If Not x(0) = Nothing Then htmlBody = htmlBody & x(0)
    
                htmlBody = htmlBody & "<br /> "
                htmlBody = htmlBody & "<img src='cid:Pic1'> "
                htmlBody = htmlBody & "<br /> "
    
                If Not x(1) = Nothing Then htmlBody = htmlBody & x(1)
    
                htmlBody = htmlBody & "</body> "
                htmlBody = htmlBody & "</html>"
    
                avHtml = AlternateView.CreateAlternateViewFromString(htmlBody, Nothing, MediaTypeNames.Text.Html)
    
                Select Case pictureExt
                    Case "jpg", "JPG", "jpeg", "JPEG"
                        pic1 = New LinkedResource(picturePath, MediaTypeNames.Image.Jpeg)
                    Case "gif", "GIF"
                        pic1 = New LinkedResource(picturePath, MediaTypeNames.Image.Gif)
                    Case "tiff", "tif", "TIFF", "TIF"
                        pic1 = New LinkedResource(picturePath, MediaTypeNames.Image.Tiff)
                End Select
    
                pic1.ContentId = "Pic1"
                avHtml.LinkedResources.Add(pic1)
    
                mail.From = New MailAddress("dhanishb@live.com")
                mail.To.Add(txtTo.Text)
                mail.Subject = txtSubject.Text
                mail.IsBodyHtml = True
                mail.Body = htmlBody
                mail.AlternateViews.Add(avHtml)
    
                If Not filePath = "" Then mail.Attachments.Add(New System.Net.Mail.Attachment(filePath))
    
                smtp.Send(mail)
    
                MsgBox("Email sent!")
    
                txtBody.Text = ""
                txtSubject.Text = ""
                txtTo.Text = ""
                picturePath = ""
                pictureExt = ""
                filePath = ""
            Catch ex As Exception
                MsgBox(ex.ToString)
            Finally
    
            End Try
        End Sub
    
        Private Sub btnAddImage_Click(sender As System.Object, e As System.EventArgs) Handles btnAddImage.Click
            Dim openDlg As OpenFileDialog = New OpenFileDialog
            Dim filter As String = openDlg.Filter
            Dim tmp() As String
            Dim img As Image
            Dim orgData
    
            openDlg.Filter = "Image File (*.tiff;*.jpg;*.gif)|*.tiff;*.jpg;*.gif"
            openDlg.Title = "Open an image file"
    
            If (openDlg.ShowDialog() = DialogResult.OK) Then
                picturePath = openDlg.FileName
    
                tmp = picturePath.Split(".")
    
                pictureExt = tmp(1)
    
                img = Image.FromFile(picturePath)
    
                orgData = Clipboard.GetDataObject
    
                Clipboard.SetImage(img)
    
                txtBody.Paste()
            End If
        End Sub
    
        Private Sub btnAddAttachement_Click(sender As System.Object, e As System.EventArgs) Handles btnAddAttachement.Click
            Dim openDlg As OpenFileDialog = New OpenFileDialog
    
            If (openDlg.ShowDialog() = DialogResult.OK) Then
                filePath = openDlg.FileName
            End If
        End Sub
    End Class
    Last edited by GremlinSA; October 23rd, 2013 at 02:41 AM. Reason: removed Credentials from code!!!

  2. #2
    Join Date
    Jan 2006
    Location
    Chicago, IL
    Posts
    15,002

    Re: Adavnced Email App

    Try this:
    Code:
    Public Sub InitializeOpenFileDialog()
        ' Set the file dialog to filter for graphics files. 
        Me.OpenFileDialog1.Filter = _
                "Images (*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|" + _
                "All files (*.*)|*.*" 
    
        ' Allow the user to select multiple images. 
        Me.OpenFileDialog1.Multiselect = True 
        Me.OpenFileDialog1.Title = "My Image Browser" 
    End Sub
    http://msdn.microsoft.com/en-us/libr...vs.110%29.aspx
    David

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  3. #3
    Join Date
    Oct 2013
    Posts
    2

    Re: Adavnced Email App

    Fanx for your reply
    But my problem is not choosing multiple files
    But rather once he has already chosen multiple files how to convert the rtf to html?

  4. #4
    Join Date
    Jun 2005
    Location
    JHB South Africa
    Posts
    3,772

    Re: Adavnced Email App

    Quote Originally Posted by Dhan17 View Post
    Fanx for your reply
    But my problem is not choosing multiple files
    But rather once he has already chosen multiple files how to convert the rtf to html?
    Actually, If you look closely at the code you posted, it only ever stores the LAST selected file, and while it may show all the selected files in the msg composition window, only the LAST selected one is attached to the sent msg...

    checkout the code I posted for helpful hints..
    Articles VB6 : Break the 2G limit - Animation 1, 2 VB.NET : 2005/8 : Moving Images , Animation 1 , 2 , 3 , User Controls
    WPF Articles : 3D Animation 1 , 2 , 3
    Code snips: VB6 Hex Edit, IP Chat, Copy Prot., Crop, Zoom : .NET IP Chat (V4), Adv. ContextMenus, click Hotspot, Scroll Controls
    Find me in ASP.NET., VB6., VB.NET , Writing Articles, My Genealogy, Forum
    All VS.NET: posts refer to VS.NET 2008 (Pro) unless otherwise stated.

  5. #5
    Join Date
    Jun 2005
    Location
    JHB South Africa
    Posts
    3,772

    Re: Adavnced Email App

    The easiest method is to create a collection or list of attachments... example code below..

    Code:
        Public Class attachments
            Private _ext As String
            Private _path As String
            Public Property ext() As String
                Get
                    Return _ext
                End Get
                Set(ByVal value As String)
                    _ext = value
                End Set
            End Property
            Public Property Path() As String
                Get
                    Return _path
                End Get
                Set(ByVal value As String)
                    _path = value
                End Set
            End Property
        End Class
    now in your code...
    Code:
    Public Class Form1
        'Dim picturePath As String
        'Dim pictureExt As String
        Dim Picture as new list of attachments
        'Dim filePath As String = ""
    and to attach the image to the mail...
    Code:
            If (openDlg.ShowDialog() = DialogResult.OK) Then
                Dim TmpAttachment as attachments
                TmpAttachment.Path = openDlg.FileName
                tmp = TmpAttachment.Path.Split(".")
    
                TmpAttachment.ext = tmp(1)
    
                Picture.add(TmpAttachment)
                img = Image.FromFile(picturePath)
    
                orgData = Clipboard.GetDataObject
    
                Clipboard.SetImage(img)
    
                txtBody.Paste()
            End If
    and you can use the same method for standard file attachments too...

    lastly to send... you need to loop over each attachment...
    Code:
               avHtml = AlternateView.CreateAlternateViewFromString(htmlBody, Nothing, MediaTypeNames.Text.Html)
    
                For Each ThisPicture in Picture
    
                    Select Case ThisPicture.ext.ToUpper
                        Case "JPG", "JPEG"
                            pic1 = New LinkedResource(ThisPicture.Path, MediaTypeNames.Image.Jpeg)
                        Case "GIF"
                            pic1 = New LinkedResource(ThisPicture.Path, MediaTypeNames.Image.Gif)
                        Case "TIFF", "TIF"
                            pic1 = New LinkedResource(ThisPicture.Path, MediaTypeNames.Image.Tiff)
                    End Select
    
                    pic1.ContentId = "Pic1"
                    avHtml.LinkedResources.Add(pic1)
                Next
    Of course you will have to make proper provisions for other file types too..
    Articles VB6 : Break the 2G limit - Animation 1, 2 VB.NET : 2005/8 : Moving Images , Animation 1 , 2 , 3 , User Controls
    WPF Articles : 3D Animation 1 , 2 , 3
    Code snips: VB6 Hex Edit, IP Chat, Copy Prot., Crop, Zoom : .NET IP Chat (V4), Adv. ContextMenus, click Hotspot, Scroll Controls
    Find me in ASP.NET., VB6., VB.NET , Writing Articles, My Genealogy, Forum
    All VS.NET: posts refer to VS.NET 2008 (Pro) unless otherwise stated.

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