vb.net进度栏值在使用async异步上传文件时抛出ArgumentOutOfRange异常

Question

我无法更新ProgressBar值，我也尝试过Convert.ToInt32(Bytes as long)。但是，它不起作用。我正在使用Progress（整数）。

'Button OnClick

Public Shared s3client As AmazonS3Client
Public Shared myProgress As Progress(Of Integer)  
Public Shared Bytes As Double
Public Shared myProgress As Progress(Of Integer)
Public Shared bucketName As String = "S3BucketName"

Private Async Sub Button1_Click(sender As Object, e As EventArgs) Handles Button2.Click

 Dim AllowedFiles As List(Of String) = New List(Of String)

            Try
                Dim TheSize As Long
                Dim TotalSize As Long
                For Each file In AllowedFiles
                    TheSize = Long.Parse((My.Computer.FileSystem.GetFileInfo(file).Length))
                    TotalSize += TheSize
                Next

                Select Case TotalSize
                    Case Is >= 1099511627776
                        Bytes = CDbl(TotalSize / 1099511627776) 'TB
                    Case 1073741824 To 1099511627775
                        Bytes = CDbl(TotalSize / 1073741824) 'GB
                    Case 1048576 To 1073741823
                        Bytes = CDbl(TotalSize / 1048576) 'MB
                    Case 1024 To 1048575
                        Bytes = CDbl(TotalSize / 1024) 'KB
                    Case 0 To 1023
                        Bytes = TotalSize ' bytes
                    Case Else
                        Bytes = 0
                        'Return ""
                End Select

                ProgForm2.CPBar1.Value = 0
                ProgForm2.CPBar1.Minimum = 0
                ProgForm2.CPBar1.Maximum = Convert.ToInt32(Bytes)

                Dim result As DialogResult = MessageBox.Show("Selected  " & TotalFiles & " files have " & CalculateSize.ToString & "" & SizeType, "in total Size", MessageBoxButtons.OKCancel, MessageBoxIcon.Information)

                If result = DialogResult.OK And TextBox1.Text IsNot "" = True Then

                    myProgress = New Progress(Of Integer)(AddressOf ReportProgress)
                         Foldername=Textbox1.Text
                        For Each file In AllowedFiles
                            Try
                                ProgForm2.Show()
                                Await AddFileToRootFolderAsync(file, bucketName, Foldername, myProgress)
                                TheSize = Long.Parse(My.Computer.FileSystem.GetFileInfo(file).Length)

                            Catch ex As Exception
                                MessageBox.Show(ex.Message)
                            End Try

                            ProgForm2.CPBar1.Text = ProgForm2.CPBar1.Value.ToString + "/" + Form2.CPBar1.Maximum.ToString
                        Next

                        ProgForm2.CPBar1.Value = ProgForm2.CPBar1.Maximum
                        If ProgForm2.CPBar1.Value = ProgForm2.CPBar1.Maximum Then
                            ProgForm2.CPBar1.Text = "Task Completed"
                            ProgForm2.Button1.Show()
                        End If
                 Else
                     Exit Sub
                 End if

End Sub

'file uploading function

Public Async Function AddFileToFolderAsync(FileName As String, bucketName As String, folderName As String, ByVal myProgress As IProgress(Of Integer)) As Task


        Try
                If AmazonS3Util.DoesS3BucketExistV2(s3client, bucketName) Then

                    Dim Checkresult = FolderCheck(bucketName, folderName) /'Folder Exist or Not
                    If Checkresult = True Then
                        Dim keyname As String = "" 'destination path(s3 bucket folder)
                        Dim filepath As String = FileName 'current file's local fullpath
                        Dim fname As String = Path.GetFileName(FileName) 'filename
                        If Not folderName.EndsWith("/") Then
                            keyname += folderName & "/"
                            keyname += fname  'bucket's target folder /fname (eg:folder/subfolder/file.mp4)
                        Else
                            keyname += fname  'bucket's target folder /fname (eg:folder/subfolder/file.mp4)
                        End If

                        Dim fileTransferUtility = New TransferUtility(s3client)
                        Dim fileTransferUtilityRequest = New TransferUtilityUploadRequest With {
                            .BucketName = bucketName,
                            .FilePath = filepath,
                            .StorageClass = S3StorageClass.Standard,
                            .ServerSideEncryptionMethod = ServerSideEncryptionMethod.None,
                            .PartSize = 6291456,
                            .Key = keyname,
                            .ContentType = "*.*"}
                        AddHandler fileTransferUtilityRequest.UploadProgressEvent,
                         Sub(sender As Object, e As UploadProgressArgs)
                             Dim percent As Integer = Convert.ToInt32(e.TransferredBytes)  //e.TransferredBytes as long
                             myProgress.Report(percent)
                         End Sub
                        Await fileTransferUtility.UploadAsync(fileTransferUtilityRequest)
                    Else
                        MessageBox.Show(folderName + " folder does not exist")
                    End If
                Else
                    MessageBox.Show(bucketName + " Bucket does not exist")
                End If

            Catch ex As AmazonS3Exception
            MessageBox.Show(ex.Message + " Upload task canceled.")

        Catch ex As Exception
            MessageBox.Show(ex.Message + " Upload task canceled.")

        End Try

    End Function

Public Sub ReportProgress（ByVal myInt As Integer）

    Form2.CPBar1.Value += myInt

    Form2.CPBar1.Text = Form2.CPBar1.Value.ToString + "/" + Form2.CPBar1.Maximum.ToString 

End Sub

我被困在这里，不知道我错过了什么。我想处理进度条，将其传输到进度条中的目标文件夹。例如，文件大小为1gb（1073741824字节），那么我如何设置进度条的最大值值= 1073741824，进度条值+ = transferredbytes。

Answer 1

似乎，当您要计算最大值时，已通过Select-Case机制考虑了TotalSize的值，因此根据其范围对其进行缩放。但是在ReportProgress中，将myInt输入整数直接添加到progressbar值。我认为您的Select-Case也应在ReportProgress中实现。