How to display images from a folder in a form, a report, or a data access page

Note

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Original KB number:   285820

Note

Requires expert coding, interoperability, and multiuser skills. This article applies to a Microsoft Access database (.mdb/.accdb) and to a Microsoft Access project (.adp).

Summary

Sometimes, it's not practical to store images in a Microsoft Access table. If you have many images, or if each of your image files is large, the size of the Microsoft Access database file can quickly increase.

This article demonstrates a custom function that you can use to:

  • Store file paths and names of images in a table.
  • Display images by using an image control.
  • Hide the image control if no image is available.
  • Provide feedback on the display status of the image.

This article also contains sample Visual Basic script that you can use to display the images in a data access page.

Note

Although this example use bitmap images (.bmp), you can also use other image types, such as .jpg, .pcx, and .gif.

Microsoft provides programming examples for illustration only, without warranty either expressed or implied. This includes, but is not limited to, the implied warranties of merchantability or fitness for a particular purpose. This article assumes that you are familiar with the programming language that is being demonstrated and with the tools that are used to create and to debug procedures. Microsoft support engineers can help explain the functionality of a particular procedure, but they will not modify these examples to provide added functionality or construct procedures to meet your specific requirements.

Creating the table to store file and path data

  1. Open the sample database, Northwind.mdb, or the sample project, NorthwindCS.adp.

  2. Create the following table either in Northwind.mdb or in NorthwindCS.adp.

    In Northwind.mdb:

    Table: tblImage
    ----------------------------
    Field Name: ImageID
    Data Type: AutoNumber
    Indexed: Yes (No Duplicates)
    
    Field Name: txtImageName
    Data Type: Text
    
    Table Properties: tblImage
    --------------------------
    PrimaryKey: ImageID
    

    In NorthwindCS.adp:

    Table: tblImage
    -----------------------
    Column Name: ImageID
    Datatype: Int
    Allow Nulls: Unchecked
    Identity: Yes
    
    Column Name: txtImageName
    Datatype: varchar
    
    Table Properties: ImageTable
    -------------------------------
    Primary Key Constraint: ImageID
    
  3. Open the tblImage table in Datasheet view, and then add the path and name of a bitmap file to each record. The following table of examples shows how the records might look:

    Type Example
    Absolute (Local) C:\Windows\Zapotec.bmp
    Absolute (UNC Path) \\Servername\sharename\Zapotec.bmp
    Relative Zapotec.bmp

Creating the custom function

  1. Create a new module, and then paste or type the following code:

    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
    
  2. Save the module as Module1.

Using the custom function in a form

  1. Create the following new form that is based on the tblImage table.

    Form: frmImage
    ----------------------
    Caption: Image Form
    RecordSource: tblImage
    
    Image Control
    ---------------------------------
    Name: ImageFrame
    Picture: "C:\Windows\Zapotec.bmp"
    
    Text box
    ----------------------
    Name: txtImageID
    ControlSource: ImageID
    
    Text box
    ---------------------------
    Name: txtImageName
    ControlSource: txtImageName
    
    Text box
    ---------------------------
    Name: txtImageNote
    ControlSource: <Blank>
    

    Note

    If you do not want the path to appear in the form, you can set the Visible property of the txtImageName control to False.

  2. On the View menu, click Code, and then paste or type the following code:

    Option Compare Database
    Option Explicit
    
    Private Sub Form_AfterUpdate()
     CallDisplayImage
    End Sub
    
    Private Sub Form_Current()
     CallDisplayImage
    End Sub
    
    Private Sub txtImageName_AfterUpdate()
     CallDisplayImage
    End Sub
    
    Private Sub CallDisplayImage()
     Me!txtImageNote = DisplayImage(Me!ImageFrame, Me!txtImageName)
    End Sub
    
  3. Open the frmImage form in Form view. Note that the form displays the corresponding bitmap for each record. If the txtImageName field is blank or if the image cannot be found, you receive appropriate messages instead of the image frame.

Using the custom function in a report

  1. Create the following new report that is based on the ImageTable table.

    Report: rptImage
    ----------------------
    Caption: Image Report
    RecordSource: tblImage
    
    Image Control
    ---------------------------------
    Name: ImageFrame
    Picture: "C:\Windows\Zapotec.bmp"
    
    Text box
    ----------------------
    Name: txtImageID
    ControlSource: ImageID
    
    Text box
    ---------------------------
    Name: txtImageName
    ControlSource: txtImageName
    
    Text box
    ---------------------------
    Name: txtImageNote
    ControlSource: <Blank>
    

    Note

    If you do not want the path to appear in the report, you can set the Visible property of the txtImageName control to False.

  2. On the View menu, click Code, and then paste or type the following code:

    Option Compare Database
    Option Explicit
    
    Private Sub Detail_Print(Cancel As Integer, PrintCount As Integer)
     Me!txtImageNote = DisplayImage(Me!ImageFrame, Me!txtImageName)
    End Sub
    
  3. Open the rptImage report in print preview. Note that the report displays the corresponding bitmap for each record. If the txtImageName field is blank or if the image cannot be found, you receive appropriate messages instead of the image frame.

Duplicating the custom function in a data access page

  1. Create the following new data access page that is based on the tblImage table.

    Data Access Page: dapImage
    -----------------------------
    Title: Image Data Access Page
    
    Image Control
    ---------------------------------
    ID: ImageFrame
    
    Text box
    ----------------------
    ID: txtImageID
    ControlSource: ImageID
    
    Text box
    ---------------------------
    ID: txtImageName
    ControlSource: txtImageName
    

    Note

    If you do not want the path to appear in the page, you can set the Visibility property of the txtImageName control to Hidden.

  2. On the Tools menu, point to Macros, and then click Microsoft Script Editor.

  3. Add the following script to the Current event of the MSODSC in the HEAD tag portion of the HTML document.

    Note

    You must pass in a parameter in order for the event to be triggered.

    <SCRIPT language=vbscript event=Current(oEventInfo) for=MSODSC>
    <!--
    ImageFrame.src=txtImageName.value
    -->
    </SCRIPT>
    
  4. Open the dapImage page in Page view. Note that the page displays the corresponding bitmap for each record. If the txtImageName field is blank, a control icon is displayed. If the image cannot be found, an X icon appears in the image control.

Use an http:// path in a form

To use an http:// path in a form, use the Web browser control (shdocvw.dll) as follows:

  1. Add a Microsoft Web Browser control to the form and name it WebBrowser.

  2. Add the following code to a module:

    Public Function DisplayImageWeb(ctlBrowserControl As Control, _
    strImagePath As Variant)
    
    On Error GoTo Err_DisplayImage
    
    Dim strDatabasePath As String
    Dim intSlashLocation As Integer
    
    With ctlBrowserControl
     If IsNull(strImagePath) Then
     ElseIf Left(strImagePath, 4) = "http" Then
         .Navigate (strImagePath)
     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
         .Navigate (strImagePath)
     End If
    End With
    
    Exit_DisplayImage:
     Exit Function
    
    Err_DisplayImage:
     Select Case Err.Number
         Case Else
             MsgBox Err.Number & " " & Err.Description
             Resume Exit_DisplayImage:
     End Select
    End Function
    
  3. Add the following code behind the form:

    Option Compare Database
    Option Explicit
    
    Private Sub Form_AfterUpdate()
     CallDisplayImage
    End Sub
    
    Private Sub Form_Current()
     CallDisplayImage
    End Sub
    
    Private Sub txtImageName_AfterUpdate()
     CallDisplayImage
    End Sub
    
    Private Sub CallDisplayImage()
     DisplayImageWeb Me.WebBrowser9, Me.txtImageName
    End Sub