.Net任務報告進度？

Question

我有一個運行的任務，該任務通過Web服務上傳字節數組。 我想報告進度，只要達到10％，20％，30％，40％等。 為了更新數據庫中的內容，我需要將GUID傳遞給Web服務，以識別文件報告進度。 但是，我無法從任務內部到達該對象。 有任何想法嗎？

入口點：

Guid smGuid;
smGuid = Guid.NewGuid();
Task t1 = new Task(action, pubAttFullPath);
t1.Start();
string attFullFilePath = System.IO.Path.GetFullPath(
    mailItem.Attachments[i].FileName);
string attExtension = System.IO.Path.GetExtension(
    mailItem.Attachments[i].FileName);

pubAttFullPath = attFullFilePath;

pubAttFileName = mailItem.Attachments[i].FileName;

任務代碼：

 Action<object> action = (object obj) =>
        {
            //Set filename from object
            string FileName;
            FileName = System.IO.Path.GetFileName(obj.ToString());

            //Declare Web Service
            TransferFile.TransferFile ws_TransferFile = new TransferFile.TransferFile();

            //
            bool transfercompleted = false;
            using (FileStream fs = new FileStream(
                 obj.ToString(),
                 FileMode.Open,
                 FileAccess.Read,
                 FileShare.Read))
            {
                //Declare Buffers and Counts
                byte[] buffer = new byte[49152];
                long fileSize = fs.Length;
                long totalReadCount = 0;
                int readCount;
                int currentPacketNumber = 0;
                int percentageComplete = 0;


                //Loop and copy file until it changes to not exactly the same byte count as the buffer
                //which means the file is about to complete.
                while ((readCount = fs.Read(buffer, 0, buffer.Length)) > 0)
                {
                    if (!transfercompleted)
                    {

                        totalReadCount += readCount;
                        byte[] bytesToTransfer;

                        if (readCount == buffer.Length)
                        {
                                //Copy bytes until buffer is different
                                bytesToTransfer = buffer;
                                ws_TransferFile.WriteBinaryFile(bytesToTransfer, FileName);
                                percentageComplete = (int)(totalReadCount / (double)fileSize * 100);
                            }
                        else
                        {
                            // Only a part is requred to upload,
                            // copy that part.
                            List<byte> b = new List<byte>(buffer);
                            bytesToTransfer = b.GetRange(0, readCount).ToArray();
                            ws_TransferFile.WriteBinaryFile(bytesToTransfer, FileName);
                            percentageComplete = 100;                         
                            transfercompleted = true;
                            fs.Close();
                            break;
                        }
                    }
                }
            }
        };

Answer 1

只是將其作為綁定變量傳遞怎么樣？

Guid smGuid;
smGuid = Guid.NewGuid();
Task t1 = new Task( _ => action( smGuid, pubAttFullPath ), null );
t1.Start();

任務代碼：

Action<Guid, string> action = (smGuid, FileName) =>
{
    //Declare Web Service
    TransferFile.TransferFile ws_TransferFile = new TransferFile.TransferFile();

    //
    bool transfercompleted = false;

    // And so on...
}