在 MS Access Form 中打印 Web 浏览器时出现问题，显示 QR 码

Question

我在 MS Access 表单中使用 WebBrowser。 WepBrowser 正在使用 chart.googleapis 显示二维码。 “显示时间”属性设置为“始终”。当我尝试打印表格或通过打印预览时，二维码不可见。一种解决方案是以某种方式将 URL 图像显示到“图像”元素，但这需要从 URL 下载图片。同一个 Access 在多台 PC 上运行，所以我必须自定义路径等。有什么建议吗？

Answer 1

您可以在我的项目 VBA.PictureUrl:

中找到的查询中使用我的函数 UrlContent

' Download (picture) file from a URL of a hyperlink field to a
' (temporary) folder, and return the full path to the downloaded file.
'
' This can be used as the control source for a bound picture control.
' If no Folder is specified, the user's IE cache folder is used.
'
' Typical usage in the RecordSource for a form or report where Id is
' the unique ID and Url is the hyperlink field holding the URL to
' the picture file to be displayed:
'
'   - to a cached file where parameter Id is not used:
'
'   Select *, UrlContent(0, [Url]) As Path From SomeTable;
'
'   - or, where Id is used to create the local file name:
'
'   Select *, UrlContent([Id], [Url], "d:\somefolder") As Path From SomeTable;
'
' Then, set ControlSource of the bound picture control to: Path
'
' 2017-05-28. Gustav Brock, Cactus Data ApS, CPH.
'
Public Function UrlContent( _
    ByVal Id As Long, _
    ByVal Url As String, _
    Optional ByVal Folder As String) _
    As Variant

    Const NoError   As Long = 0
    Const Dot       As String = "."
    Const BackSlash As String = "\"
    
    Dim Address     As String
    Dim Ext         As String
    Dim Path        As String
    Dim Result      As String
    
    ' Strip leading and trailing octothorpes from URL string.
    Address = HyperlinkPart(Url, acAddress)
    ' If Address is a zero-length string, Url was not wrapped in octothorpes.
    If Address = "" Then
        ' Use Url as is.
        Address = Url
    End If
    
    If Folder = "" Then
        ' Import to IE cache.
        Result = DownloadCacheFile(Address)
    Else
        If Right(Folder, 1) <> BackSlash Then
            ' Append a backslash.
            Folder = Folder & BackSlash
        End If
    
        ' Retrieve extension of file name.
        Ext = StrReverse(Split(StrReverse(Address), Dot)(0))
        ' Build full path for downloaded file.
        Path = Folder & CStr(Id) & Dot & Ext
        
        If DownloadFile(Address, Path) = NoError Then
            Result = Path
        End If
    End If
    
    UrlContent = Result
    
End Function

示例：

在 MS Access Form 中打印 Web 浏览器时出现问题，显示 QR 码

Problem printing a web Browser in MS Access Form, displaying a QR code

ms-access

qr-code

google-api