Adding Images into Forms from External Sources using Paths

问题

I've been searching around on Google to find a better way to show images in Access without actually inserting the image into the database.

I found this article 'http://support.microsoft.com/kb/285820' via this thread 'Is there a way to get ms-access to display images from external files' which goes into great detail on how to set paths to pictures through folders/files, and it works great, for a 'set' picture. However, I want a different picture to display when I switch to a different record.

Here is the code from the article:

Option Compare Database
Option Explicit

Public Function DisplayImage(ctlImageControl As Control, strImagePath As Variant) As String
On Error GoTo Err_DisplayImage

Dim strResult As String
Dim strDatabasePath As String
Dim intSlashLocation As Integer

With ctlImageControl
    If IsNull(strImagePath) Then
        .Visible = False
        strResult = "No image name specified."
    Else
        If InStr(1, strImagePath, "\") = 0 Then
            ' Path is relative
            strDatabasePath = CurrentProject.FullName
            intSlashLocation = InStrRev(strDatabasePath, "\", Len(strDatabasePath))
            strDatabasePath = Left(strDatabasePath, intSlashLocation)
            strImagePath = strDatabasePath & strImagePath
        End If
    .Visible = True
    .Picture = strImagePath
    strResult = "Image found and displayed."
    End If
End With

Exit_DisplayImage:
    DisplayImage = strResult
    Exit Function

Err_DisplayImage:
    Select Case Err.Number
        Case 2220       ' Can't find the picture.
            ctlImageControl.Visible = False
            strResult = "Can't find image in the specified name."
            Resume Exit_DisplayImage:
        Case Else       ' Some other error.
            MsgBox Err.Number & " " & Err.Description
            strResult = "An error occurred displaying image."
            Resume Exit_DisplayImage:
    End Select
End Function

I have a feeling that I need to place a line of code that states something like, show image where Image.ID = "ID", but I can't figure out where to put it without getting errors. Am I over-looking something perhaps, or am I approaching this the wrong way? I just don't want to clutter my database, memory-wise, with .bmp images, but I feel like I am going to have to.

SOLVED: A much easier solution is as Gord Thompson has described below in the comments. And from my own experience, using this method for .bmp images leaves the picture distorted and out of contrast. I tested the image for .jpg and it worked perfectly! I hope this helps others who are having trouble with similar problems finds this post helpful.

回答1:

The Microsoft Support article you cited applies to Access 2003. In Access 2010 (and later) there is a much simpler way to do it. All you need to do is place an Image control on the form and bind it to the field in your table that contains the path to the image file.

For example, with an [Employees] table like this

EmployeeID  FirstName  LastName  PhotoPath                        
----------  ---------  --------  ---------------------------------
         1  Gord       Thompson  C:\Users\Public\Pictures\Gord.jpg
         2  Hank       Kingsley  C:\Users\Public\Pictures\Hank.png

you could use an Image control whose Control Source is the [PhotoPath] field ...