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AsyncFileUpload resize

Question
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User1510859543 posted
We have an asp.net page with the AsyncFileUpload control to do immediate uploads of a selected file(s) and it works perfectly. However, the users now want to have the file resized before it is saved/uploaded. We are using the following code-behind to save the uploaded file to a specific location. After that code is a Resize_Image function that we use for resizing an image from a stream and then saving the resized image. How can I get the code-behind to create a stream for the upload?
Protected Sub UploadedComplete(ByVal sender As Object, ByVal e As AjaxControlToolkit.AsyncFileUploadEventArgs) Handles AsyncFileUpload1.UploadedComplete Dim filePath As String = txtFolderPath.Text Dim fi As FileInfo = New FileInfo(filePath) filePath = Replace(filePath, "\", "\\") filePath = Replace(filePath, "\\\\", "\\") Dim fiu As FileInfo = New FileInfo(AsyncFileUpload1.PostedFile.FileName) If ckJobIDPhoto.Checked Then filePath &= "\\Job ID Photo" & fiu.Name & "." & fiu.Extension ckJobIDPhoto.Checked = False Else filePath &= "\\" & txtPhotoPrefix.Text & fiu.Name & "." & fiu.Extension End If filePath = Replace(filePath, "..jpg", "") txtMsg.Text = filePath AsyncFileUpload1.SaveAs(filePath) End Sub Public Shared Function Resize_Image(ByVal streamImage As Stream, ByVal maxWidth As Integer, ByVal maxHeight As Integer) As Bitmap Dim originalImage As New Bitmap(streamImage) Dim newWidth As Integer = originalImage.Width Dim newHeight As Integer = originalImage.Height Dim aspectRatio As Double = CDbl(originalImage.Width) / CDbl(originalImage.Height) If aspectRatio <= 1 AndAlso originalImage.Width > maxWidth Then newWidth = maxWidth newHeight = CInt(Math.Round(newWidth / aspectRatio)) ElseIf aspectRatio > 1 AndAlso originalImage.Height > maxHeight Then newHeight = maxHeight newWidth = CInt(Math.Round(newHeight * aspectRatio)) End If Return New Bitmap(originalImage, newWidth, newHeight) End Function
Thursday, December 10, 2015 8:53 PM
Answers
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User1510859543 posted
I figured it out.
- Marked as answer by Anonymous Thursday, October 7, 2021 12:00 AM
Thursday, December 10, 2015 9:14 PM
All replies
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User1510859543 posted
I figured it out.
- Marked as answer by Anonymous Thursday, October 7, 2021 12:00 AM
Thursday, December 10, 2015 9:14 PM -
User61956409 posted
http://forums.asp.net/t/2079853.aspx
Hi dlchase,
I figured it out.I’m glad to hear that you resolve the problem by yourself. Could you show us your solution? Besides, the following article explained how to resize image, hoping helpful for others to resolve the resizing image problem.
Best Regards,
Fei Han
Friday, December 11, 2015 5:44 AM