此错误已经发布了很多帖子,但我似乎无法找到解决方案;当以编程方式(使用LoadPicture()
函数)将图片加载到用户窗体上的图像控件时,我收到此错误:
运行时错误481 - 图片无效
和类似的
图片无效
手动加载时的消息。
在我的互联网搜索中,我发现了一大堆关于此错误的建议;大多数帖子往往是因为user is uploading a png或其他无效图片(such as a corrupt jpg),some suggest我的temp
文件夹已满,others think病毒是原因(我对最后一个持怀疑态度。)
在我的申请中,我的照片是
jpg(LoadPicture()
文章备注部分MSDN lists as an acceptable format)
没有损坏(至少我可以用windows photoviewer / Chrome / Paint查看它)
相对较小(例如,它是~1MPx和200MPx jpeg我测试加载没有任何错误)
唯一不同寻常的是,我使用以下代码直接从网上下载:
Public Declare Function URLDownloadToFile Lib "urlmon" _
Alias "URLDownloadToFileA" _
(ByVal pCaller As Long, _
ByVal szURL As String, _
ByVal szFileName As String, _
ByVal dwReserved As Long, _
ByVal lpfnCB As Long) As Long 'api to download files
Sub setPicTest()
Dim tmpImg As MSForms.Image 'create an image control on UserForm1 at runtime
Set tmpImg = UserForm1.Controls.Add("Forms.Image.1")
tmpImg.Picture = getImg("https://s-media-cache-ak0.pinimg.com/originals/22/e2/4d/22e24d3b5703a1c1cc43df5b13f53fd2.png")
End Sub
Function getImg(url As String) As IPictureDisp 'loads a picture from a url
Dim strFile As String 'file save location
strFile = Environ("Temp") & "\Temp.jpg" 'save *as jpeg* in %temp% folder
Debug.Print URLDownloadToFile(0, url, strFile, 0, 0) 'download file to temp folder
Set getImg = LoadPicture(strFile) 'load image -error-
Kill strFile 'clean up temp file
End Function
当我单步执行时,一切都按预期运行
temp.jpg
的文件
然后代码执行中断了错误。这一点特别令人惊讶,因为代码对于小缩略图图像工作正常,只是这些全分辨率图像似乎无法正常工作。
答案 0 :(得分:4)
这是一个png文件。将其重命名为jpg无济于事。 URLDownloadToFile
下载文件。它不会更改文件类型。
说过这是实现你想要的一种方式;)
<强>逻辑强>:
.Jpg
LoadPicture
<强>代码强>
Sub setPicTest()
Dim wsTemp As Worksheet
Dim tmpImg As MSForms.Image
Dim PicPath As String, tmpPath As String
Dim oCht As Chart
Set tmpImg = UserForm1.Controls.Add("Forms.Image.1")
Set wsTemp = ThisWorkbook.Sheets.Add
'~~> This is the .PNG image
PicPath = "https://s-media-cache-ak0.pinimg.com/originals/22/e2/4d/22e24d3b5703a1c1cc43df5b13f53fd2.png"
'~~> This will be the .JPG image
tmpPath = Environ("Temp") & "\Temp.jpg"
With wsTemp
.Pictures.Insert(PicPath).ShapeRange.LockAspectRatio = msoTrue
DoEvents
Set oCht = Charts.Add
.Shapes(1).CopyPicture xlScreen, xlBitmap
With oCht
.Paste
.Export Filename:=tmpPath, Filtername:="JPG"
End With
DoEvents
tmpImg.Picture = LoadPicture(tmpPath)
'~~> Clean Up
On Error Resume Next
Application.DisplayAlerts = False
.Delete
oCht.Delete
Application.DisplayAlerts = True
On Error GoTo 0
End With
'~~> Delete the temp image
Kill tmpPath
End Sub
修改强>
出于测试目的,我使用了这些设置
Set tmpImg = UserForm1.Controls.Add("Forms.Image.1")
With tmpImg
.Left = 20 '~~> This property does not shown in Intellisense
.Width = 300 '~~> This property does not shown in Intellisense
.Height = 300 '~~> This property does not shown in Intellisense
.Top = 10 '~~> This property does not shown in Intellisense
.PictureAlignment = fmPictureAlignmentCenter
.PictureSizeMode = fmPictureSizeModeStretch
End With
<强>截图强>
答案 1 :(得分:0)
正如@Siddharth Rout指出的那样,即使对于Windows资源管理器我下载的文件看起来像一个jpeg,它确实仍然是一个导致错误的png。相信我,当我说我的实际代码不如我在这里发布的那么清晰,所以文件的png扩展名被隐藏了,更难以发现!
无论如何,他提供了一个让png进入图像控件的答案。我要采取的另一个选择是:
if (a==find) { r.getCell(i, j).setValue(repl);}
Function getImg(url As String) As IPictureDisp 'loads a picture from a url
Dim strFile As String 'file save location
strFile = Environ("Temp") & "\Temp.png" 'save with more extensions like png in %temp% folder
Debug.Print URLDownloadToFile(0, url, strFile, 0, 0) 'download file to temp folder
With New WIA.ImageFile
.LoadFile strFile
Set getImgPng = .FileData.Picture 'return same thing as LoadPicture() would
End With
Kill strFile 'clean up temp file
End Function
对象需要引用Windows Vista或更高版本中可用的Microsoft Windows Image Acquisition Library v2.0
。