Question

I’m trying to resize one image to 5 different sizes (and then upload them to amazonS3).

I’m using imageresizer.net

the problem seems to be that i cannot use the inputstream twice. it works the first time.

    Dim SmallStream As Stream = New MemoryStream
    Dim TinyStream As Stream = New MemoryStream

    If FileUpload1.HasFile Then
        **ImageResizer.ImageBuilder.Current.Build(FileUpload1.PostedFile.InputStream, SmallStream, New ResizeSettings("maxwidth=100&maxheight=100"))
        ImageResizer.ImageBuilder.Current.Build(FileUpload1.PostedFile.InputStream, TinyStream, New ResizeSettings("maxwidth=100&maxheight=100"))**
        AmazonUploadFile("SmallImages/" & FileUpload1.FileName, SmallStream)
        AmazonUploadFile("TinyImages/" & FileUpload1.FileName, TinyStream)
    End If




Public Shared Function GetS3Client() As AmazonS3
    Dim appConfig As NameValueCollection = ConfigurationManager.AppSettings
    Dim s3Client As AmazonS3 = AWSClientFactory.CreateAmazonS3Client(AWS_ACCESS_KEY, AWS_SECRET_KEY)
    Return s3Client
End Function

Public Sub AmazonUploadFile(S3Key As String, FileStream As Stream)
    Dim request As New PutObjectRequest()
    request.WithBucketName(BUCKET_NAME)
    request.WithKey(S3Key).InputStream = FileStream
    request.WithCannedACL(S3CannedACL.PublicRead)
    GetS3Client.PutObject(request)
End Sub

The code breaks when i try to retrieve the FileUpload1.PostedFile.InputStream the second time.

Answer 1

I believe ImageResizer will accept Image objects to that method. So, you could read the InputStream into an Image object first (Image.FromStream()), then you can use that image object repeatedly.