C# 使用SSH.NET和WPF MVVM进行并行文件上载的进度条

我正在尝试构建一个WPF应用程序，它使用SSH.NET在服务器上并行上传多个文件，并为每个文件显示一个进度条

在视图中，我有以下数据网格：

                <DataGrid
                    AlternatingRowBackground="LightGray"
                    AutoGenerateColumns="False"
                    CanUserAddRows="False"
                    CanUserDeleteRows="False"
                    IsReadOnly="True"
                    ItemsSource="{Binding Files, Mode=TwoWay}"
                    SelectedItem="{Binding SelectedFile, Mode=OneWayToSource}">
                    <DataGrid.Columns>
                        <DataGridTextColumn Binding="{Binding Path=DisplayName}" Header="File" />
                        <DataGridTextColumn Binding="{Binding Path=FileSize}" Header="Size" />
                        <DataGridTextColumn Binding="{Binding Path=IsUploaded, Mode=OneWay}" Header="Uploaded" />
                        <DataGridTextColumn Binding="{Binding Path=IsUploading, Mode=OneWay}" Header="Uploading" />
                        <DataGridTemplateColumn Header="Progress">
                            <DataGridTemplateColumn.CellTemplate>
                                <DataTemplate>
                                    <Grid>
                                        <ProgressBar
                                            Width="300"
                                            Height="10"
                                            Maximum="{Binding FileSize}"
                                            Value="{Binding Path=SizeUploaded, Mode=OneWay}" />
                                        <TextBlock
                                            Margin="0,5,0,0"
                                            HorizontalAlignment="Center"
                                            Text="{Binding Path=PercentageCompleted, StringFormat={}{0}%}" />
                                    </Grid>
                                </DataTemplate>
                            </DataGridTemplateColumn.CellTemplate>
                        </DataGridTemplateColumn>
                        <DataGridTemplateColumn Header="Start">
                            <DataGridTemplateColumn.CellTemplate>
                                <DataTemplate>
                                    <Button cal:Message.Attach="UploadFile" Content="Start" />
                                </DataTemplate>
                            </DataGridTemplateColumn.CellTemplate>
                        </DataGridTemplateColumn>
                        <DataGridTemplateColumn Header="Stop">
                            <DataGridTemplateColumn.CellTemplate>
                                <DataTemplate>
                                    <Button cal:Message.Attach="StopTransfer" Content="Stop" />
                                </DataTemplate>
                            </DataGridTemplateColumn.CellTemplate>
                        </DataGridTemplateColumn>
                        <DataGridTemplateColumn Header="Remove">
                            <DataGridTemplateColumn.CellTemplate>
                                <DataTemplate>
                                    <Button cal:Message.Attach="RemoveFile" Content="Remove" />
                                </DataTemplate>
                            </DataGridTemplateColumn.CellTemplate>
                        </DataGridTemplateColumn>
                    </DataGrid.Columns>

                </DataGrid>

要在服务器上上载文件，使用SSH.NET，我将执行以下操作：

    private async Task UploadFileToServer(ConnectionModel connection, string fileName, string destinationPath)
    {
        if (!string.IsNullOrWhiteSpace(destinationPath))
        {
            await Task.Run(() =>
            {
                var currentUploadedFile = Files.FirstOrDefault(x => x.FullName == fileName);

                currentUploadedFile.IsUploading = true;
                try
                {
                    _fileManager.UploadFile(connection, fileName, destinationPath);

                    currentUploadedFile.IsUploaded = true;
                }

                catch (Exception ex)
                {
                    BroadCastErrorMessage(ex.Message);
                    IsConnectionTabExpanded = true;
                }
                finally
                {
                    currentUploadedFile.IsUploading = false;
                }
            });
        }

        else
        {
            BroadCastErrorMessage("ERROR: You must enter a destination folder!");
            IsConnectionTabExpanded = true;
        }
    }

FileManager调用的实际ssh.net库包含：

                        using (var fs = new FileStream(fileName, FileMode.Open))
                        {
                            fullFileName = fileName;
                            sftp.BufferSize = 4 * 1024;
                            sftp.UploadFile(fs, Path.GetFileName(fileName), true, uploadCallback: UpdateProgresBar);
                            OnFileUploadedSuccess($@"Successfully uploaded {fileName} in {path}.");
                            status = FileRenamedStatus.Uploaded;
                        }

并引发具有上载大小的事件：

    private void UpdateProgresBar(ulong uploaded)
    {
        OnFileUploading(uploaded);
    }

   protected void OnFileUploading(ulong uploaded)
    {
        FileUploading?.Invoke(this, new UploadingEventArgs(new UploadedFile
        {
            SizeUploaded = (int)uploaded,
            FullName = fullFileName
        }));
    }

在ViewModel中，我正在侦听事件并更新进度条：

    private void OnUploading(object sender, UploadingEventArgs e)
    {
        foreach (var item in Files.ToList())
        {
            if (item.FullName == e.UploadedFile.FullName)
            {
                item.SizeUploaded = e.UploadedFile.SizeUploaded;

                var percentage = (double)e.UploadedFile.SizeUploaded / item.FileSize;

                item.PercentageCompleted = Math.Round(percentage * 100, 2);
            }
        }
    }

我的问题是，当我开始第二次文件传输时，第一次传输的进度条会停止，第二次传输的进度条会发疯，显示随机值，增加或减少。我猜第一个文件的进度也在增加

不知何故，我无法区分每个进度条的进度

---

我做错了什么？

我不确定这是否是正确的修复方法，但似乎每次调用

UploadFileToServer（）

时都从IoC（使用Caliburn.Micro）获取一个新的

\u fileManager

实例解决了progressbar问题：

var-manager=IoC.Get（）；
manager.onuploding+=onuploding

    private void UpdateProgresBar(ulong uploaded)
    {
        OnFileUploading(uploaded);
    }

   protected void OnFileUploading(ulong uploaded)
    {
        FileUploading?.Invoke(this, new UploadingEventArgs(new UploadedFile
        {
            SizeUploaded = (int)uploaded,
            FullName = fullFileName
        }));
    }

    private void OnUploading(object sender, UploadingEventArgs e)
    {
        foreach (var item in Files.ToList())
        {
            if (item.FullName == e.UploadedFile.FullName)
            {
                item.SizeUploaded = e.UploadedFile.SizeUploaded;

                var percentage = (double)e.UploadedFile.SizeUploaded / item.FileSize;

                item.PercentageCompleted = Math.Round(percentage * 100, 2);
            }
        }
    }