保存附件时在文件名中添加电子邮件主题

Question

我的目标是在名为 Infuse Energy Daily Usage Reports 的 Outlook 收件箱子文件夹中提取电子邮件的 .png 文件。

每封电子邮件包含六个png 文件。最大的是我唯一需要的；它正好是 37.6KB。下一个最大的文件是 22.5KB。第三大是 18.2KB。

代码主要满足我的需要。

我想将电子邮件的完整主题添加到文件名的开头。

文件名应为：
“电子邮件主题，创建时间（“yyyymmdd_hhnnss_”），PNG 图像的原始文件名。”

Sub SaveAttachmentsToFolder()
' This Outlook macro checks a named subfolder in the Outlook Inbox
' (here the "Infuse Eneregy Daily Usage Reports" folder) for messages with attached
' files of a specific type (here file with a "png" extension)
' and saves them to disk. Saved files are timestamped. The user
' can choose to view the saved files in Windows Explorer.
' NOTE: make sure the specified subfolder and save folder exist
' before running the macro.
    On Error GoTo SaveAttachmentsToFolder_err
' Declare variables
    Dim ns As NameSpace
    Dim Inbox As MAPIFolder
    Dim SubFolder As MAPIFolder
    Dim Item As Object
    Dim Atmt As Attachment
    Dim FileName As String
    Dim i As Integer
    Dim varResponse As VbMsgBoxResult
    Set ns = GetNamespace("MAPI")
    Set Inbox = ns.GetDefaultFolder(olFolderInbox)
    Set SubFolder = Inbox.Folders("Infuse Energy Daily Usage Reports") ' Enter correct subfolder name.
    i = 0
' Check subfolder for messages and exit if none found
    If SubFolder.Items.Count = 0 Then
        MsgBox "There are no messages in the Infuse Energy Daily Usage folder.", vbInformation, _
               "Nothing Found"
        Exit Sub
    End If
' Check each message for attachments
    For Each Item In SubFolder.Items
        For Each Atmt In Item.Attachments
' Check filename of each attachment and save if it has "png" extension
            If Right(Atmt.FileName, 3) = "png" Then
            ' This path must exist! Change folder name as necessary.
                FileName = "C:\Desktop\Energy Comparisons\Infuse Reports (from email)\" & _
                Format(Item.CreationTime, "yyyymmdd_hhnnss_") & Atmt.FileName
                Atmt.SaveAsFile FileName
                i = i + 1
            End If
        Next Atmt
    Next Item
' Show summary message
    If i > 0 Then
        varResponse = MsgBox("I found " & i & " attached files." _
        & vbCrLf & "I have saved them into the Infuse Reports (from email)." _
        & vbCrLf & vbCrLf & "Would you like to view the files now?" _
        , vbQuestion + vbYesNo, "Finished!")
' Open Windows Explorer to display saved files if user chooses
        If varResponse = vbYes Then
            Shell "Explorer.exe /e,C:\Desktop\Energy Comparisons\Infuse Reports (from email)", vbNormalFocus
        End If
    Else
        MsgBox "I didn't find any attached files in your mail.", vbInformation, "Finished!"
    End If
' Clear memory
SaveAttachmentsToFolder_exit:
    Set Atmt = Nothing
    Set Item = Nothing
    Set ns = Nothing
    Exit Sub
' Handle Errors
SaveAttachmentsToFolder_err:
    MsgBox "An unexpected error has occurred." _
        & vbCrLf & "Please note and report the following information." _
        & vbCrLf & "Macro Name: GetAttachments" _
        & vbCrLf & "Error Number: " & Err.Number _
        & vbCrLf & "Error Description: " & Err.Description _
        , vbCritical, "Error!"
    Resume SaveAttachmentsToFolder_exit
End Sub

Answer 1

首先，不需要遍历文件夹中的所有项目：

 For Each Item In SubFolder.Items
        For Each Atmt In Item.Attachments

这并不是一个好主意，因为遍历文件夹中的所有项目可能需要很长时间。相反，您需要使用 Find/FindNext 或 Items 类的 Restrict 方法。过滤器示例：[Attachment & Subject Like '%keyword%']

Filter = "@SQL=" & Chr(34) & "urn:schemas:httpmail:subject" & _
                   Chr(34) & " Like '%keyword%' AND " & _
                   Chr(34) & "urn:schemas:httpmail:hasattachment" & _
                   Chr(34) & "=1"

在以下文章中详细了解这些方法：

• How To: Use Find and FindNext methods to retrieve Outlook mail items from a folder (C#, VB.NET)
• How To: Use Restrict method to retrieve Outlook mail items from a folder

关于保存到磁盘的附件的文件名，在调用SaveAsFile方法之前，需要确保文件名中没有包含禁止符号。

If Right(Atmt.FileName, 3) = "png" Then
            ' This path must exist! Change folder name as necessary.
                FileName = "C:\Desktop\Energy Comparisons\Infuse Reports (from email)\" & Item.Subject & _
                 Format(Item.CreationTime, "yyyymmdd_hhnnss_") & Atmt.FileName
                Atmt.SaveAsFile FileName
                i = i + 1
            End If

另外请注意，Outlook 文件夹可能包含不同类型的项目。我建议在运行时检查项目的类型，以确保您只处理邮件项目。 Class 属性返回一个 OlObjectClass 常量，指示对象的类。或者只使用以下条件：

If TypeOf Item Is MailItem Then
 ' your code here
End If