Windows Azure 之 Storage Queue常用操作

1．建立隊列(Queue)

        #region New Queue        public void NewQueue(string name)        {            if (CloudStorageAccount == null) return;            try            {                ClearStatus();                CloudQueueClient client = CloudStorageAccount.CreateCloudQueueClient();                CloudQueue queue = client.GetQueueReference(name);                queue.Create();                Refresh();                ReportSuccess("Queue " + name + " created");            }            catch (Exception ex)            {                ReportException(ex);            }        }        #endregion

2. 拷貝隊列 (Queue)

        #region Copy Queue        public void CopyQueue(string name, string destName)        {            try            {                ListSpinnerVisible = Visibility.Visible;                ClearStatus();                CloudQueueClient client = CloudStorageAccount.CreateCloudQueueClient();                CloudQueue queue = client.GetQueueReference(name);                CloudQueue destQueue = client.GetQueueReference(destName);                destQueue.CreateIfNotExist();                CloudQueueMessage message;                while ((message = queue.GetMessage(TimeSpan.FromSeconds(5))) != null)                {                    destQueue.AddMessage(new CloudQueueMessage(message.AsBytes));                }                ReportSuccess("Queue " + name + " copied to " + destName);            }            catch (Exception ex)            {                ReportException(ex);            }            Refresh();        }        #endregion

3. 重新命名隊列 (Queue)

#region Rename Queue        public void RenameQueue(string name, string destName)        {            try            {                ListSpinnerVisible = Visibility.Visible;                ClearStatus();                CloudQueueClient client = CloudStorageAccount.CreateCloudQueueClient();                CloudQueue queue = client.GetQueueReference(name);                CloudQueue destQueue = client.GetQueueReference(destName);                if (destQueue.Exists())                {                    ReportError("Cannot rename queue - the destination queue '" + destName + "' already exists");                    ListSpinnerVisible = Visibility.Collapsed;                    return;                }                destQueue.Create();                CloudQueueMessage message;                while ((message = queue.GetMessage()) != null)                {                    destQueue.AddMessage(new CloudQueueMessage(message.AsBytes));                    queue.DeleteMessage(message);                }                queue.Delete();                ReportSuccess("Queue " + name + " renamed to " + destName);            }            catch (Exception ex)            {                ReportException(ex);            }            Refresh();        }        #endregion

4. 刪除隊列 (Queue)

        #region Delete Queue        public void DeleteQueue(string name)        {            try            {                ListSpinnerVisible = Visibility.Visible;                ClearStatus();                CloudQueueClient client = CloudStorageAccount.CreateCloudQueueClient();                CloudQueue queue = client.GetQueueReference(name);                queue.Delete();                ReportSuccess("Queue " + name + " deleted");            }            catch (Exception ex)            {                ReportException(ex);            }            Refresh();        }        #endregion

5. 建立訊息 (Message) 

        public void NewMessage(string queueName, string textContent)        {            if (CloudStorageAccount == null) return;            try            {                ClearStatus();                CloudQueueClient client = CloudStorageAccount.CreateCloudQueueClient();                CloudQueue queue = client.GetQueueReference(queueName);                queue.CreateIfNotExist();                queue.AddMessage(new CloudQueueMessage(textContent));                RefreshDetail(queueName);                ReportSuccess("New message queued");            }            catch (Exception ex)            {                ReportException(ex);            }        }

6. 刪除一個 (隊列頂部的) 訊息(Message)

public void DeleteMessage(string queueName)        {            try            {                DetailSpinnerVisible = Visibility.Visible;                ClearStatus();                CloudQueueClient client = CloudStorageAccount.CreateCloudQueueClient();                CloudQueue queue = client.GetQueueReference(queueName);                CloudQueueMessage message = queue.GetMessage();                if (message != null)                {                    queue.DeleteMessage(message);                }                ReportSuccess("Message removed from queue");            }            catch (Exception ex)            {                ReportException(ex);            }            RefreshDetail(queueName);        }

 7. 刪除隊列中的所有訊息 (Message)

        public void DeleteAllMessages(string queueName)        {            CloudQueueMessage message;            try            {                DetailSpinnerVisible = Visibility.Visible;                ClearStatus();                CloudQueueClient client = CloudStorageAccount.CreateCloudQueueClient();                CloudQueue queue = client.GetQueueReference(queueName);                while ((message = queue.GetMessage()) != null)                {                    queue.DeleteMessage(message);                }                ReportSuccess("Queue " + queueName + " cleared");            }            catch (Exception ex)            {                ReportException(ex);            }            RefreshDetail(queueName);        }

8.上傳訊息到隊列

#region Upload Message        private string UploadQueueName;        private CloudQueue UploadQueue;        public void UploadMessages(string queueName, string[] filenames)        {            if (CloudStorageAccount == null ||                filenames == null ||                filenames.Length == 0 ||                UploadInProgress)                return;            UploadInProgress = true;            UploadFileList = filenames;            DetailSpinnerVisible = Visibility.Visible;            ReportActive("Uploading Messages..");            UploadQueueName = queueName;            CloudQueueClient client = CloudStorageAccount.CreateCloudQueueClient();            UploadQueue = client.GetQueueReference(queueName);            BackgroundWorker background = new BackgroundWorker();            background.DoWork += new DoWorkEventHandler(Background_UploadMessages);            background.RunWorkerCompleted += new RunWorkerCompletedEventHandler(Background_UploadMessagesCompleted);            background.RunWorkerAsync();        }        void Background_UploadMessages(object sender, DoWorkEventArgs e)        {            try            {                int count = 0;                int errors = 0;                if (UploadQueue != null)                {                    foreach (string filename in UploadFileList)                    {                        DetailSpinnerVisible = Visibility.Visible;                        try                        {                            UploadQueue.AddMessage(new CloudQueueMessage(File.ReadAllBytes(filename)));                            count++;                        }                        catch (Exception ex)                        {                            if (errors == 0)                            {                                ReportException(ex);                            }                            errors++;                        }                        RefreshDetail(UploadQueueName);                    }                }                if (errors > 0)                {                    if (count > 0)                    {                        ReportWarning("Upload complete, " + numberof(count, "message", "messages") + " added, " + numberof(errors, "error", "errors"));                    }                    else                    {                        ReportError("Upload failed, " + numberof(count, "message", "messages") + " added, " + numberof(errors, "error", "errors"));                    }                }                else                {                    ReportSuccess("Upload complete, " + numberof(count, "message", "messages") + " added");                }            }            catch (Exception ex)            {                ReportException(ex);            }        }        void Background_UploadMessagesCompleted(object sender, RunWorkerCompletedEventArgs e)        {            UploadInProgress = false;            DetailSpinnerVisible = Visibility.Collapsed;        }        #endregion

9.從隊列中下載訊息

        #region Download Messages        private CloudQueueMessage[] DownloadMessageList;        public void DownloadMessages(string containerName, CloudQueueMessage[] messages, string[] filenames)        {            if (CloudStorageAccount == null || messages == null) return;            DownloadMessageList = messages;            DownloadFileList = filenames;            DetailSpinnerVisible = Visibility.Visible;            ReportActive("Downloading Messages...");            DownloadInProgress = true;            BackgroundWorker background = new BackgroundWorker();            background.DoWork += new DoWorkEventHandler(Background_DownloadMessages);            background.RunWorkerCompleted += new RunWorkerCompletedEventHandler(Background_DownloadMessagesCompleted);            background.RunWorkerAsync();        }        void Background_DownloadMessages(object sender, DoWorkEventArgs e)        {            try            {                CloudQueueMessage message;                string filename;                int count = DownloadMessageList.Length;                for (int i = 0; i < count; i++)                {                    message = DownloadMessageList[i];                    filename = DownloadFileList[i];                    File.WriteAllBytes(filename, message.AsBytes);                }                ReportSuccess("Download Complete");            }            catch (Exception ex)            {                ReportException(ex);            }        }        void Background_DownloadMessagesCompleted(object sender, RunWorkerCompletedEventArgs e)        {            DownloadInProgress = false;            DetailSpinnerVisible = Visibility.Collapsed;        }        #endregion