在处理 WinSCPnet.dll FileTransferProgress 时，如何在 SSIS 脚本任务中使用 DTS.Events.FireInformation()? [英] How do I use DTS.Events.FireInformation() in SSIS Script Task while handling WinSCPnet.dll FileTransferProgress?

问题描述

我在 SSIS (2008) 包中有一个脚本任务，可将文件从远程 FTP 服务器下载到本地目录.脚本任务是用 C# 2008 编写的，并使用 WinSCPnet.dll.使用 WinSCP 文档中的示例，我想出了下面的脚本.脚本可以正常下载文件，但所有文件成功/失败消息都会保留，直到整个脚本完成，然后所有消息都会立即转储.使用 Console.Write() 根本不显示文件进度，并尝试在 SessionFileTransferProgress 中使用 Dts.Events.FireInformation() 给了我

I have a Script Task in an SSIS (2008) package that downloads files from a remote FTP server to a local directory. The Script Task is written in C# 2008, and uses WinSCPnet.dll. Using examples from WinSCP's documentation, I came up with the script below. The script functions correctly to download the files, but all the file success/failure messages are held until the entire script completes, and then all the messages are dumped at once. File progress is not displayed at all using Console.Write(), and trying to use Dts.Events.FireInformation() in SessionFileTransferProgress gives me

错误:非静态字段、方法或属性 Microsoft.SqlServer.Dts.Tasks.ScriptTask.VSTARTScriptObjectModelBase.Dts.get 需要对象引用"

有没有一种方法可以使用 DTS.events.Fire* 事件来显示文件进度信息，以及每个文件后的文件完成状态?

Is there a way I can use the DTS.events.Fire* events to display file progress information as it happens, and file completion status after each file?

脚本:

/*
   Microsoft SQL Server Integration Services Script Task
   Write scripts using Microsoft Visual C# 2008.
   The ScriptMain is the entry point class of the script.
*/

using System;
using Microsoft.SqlServer.Dts.Runtime;
using Microsoft.SqlServer.Dts.Tasks.ScriptTask;
using System.AddIn;
using WinSCP;

namespace ST_3a1cf75114b64e778bd035dd91edb5a1.csproj
{
    [AddIn("ScriptMain", Version = "1.0", Publisher = "", Description = "")]
    public partial class ScriptMain : VSTARTScriptObjectModelBase
    {
        public void Main()
        {
            // Setup session options
            SessionOptions sessionOptions = new SessionOptions
            {
                Protocol = Protocol.Ftp,
                HostName = (string)Dts.Variables["User::FTPServerName"].Value,
                UserName = (string)Dts.Variables["User::UserName"].Value,
                Password = (string)Dts.Variables["User::Password"].Value
            };

            try
            {
                using (Session session = new Session())
                {
                    // Will continuously report progress of transfer
                    session.FileTransferProgress += SessionFileTransferProgress;

                    session.ExecutablePath = (string)Dts.Variables["User::PathToWinSCP"].Value;

                    // Connect
                    session.Open(sessionOptions);

                    TransferOptions transferOptions = new TransferOptions();
                    transferOptions.TransferMode = TransferMode.Binary;


                    TransferOperationResult transferResult = session.GetFiles(
                                                                                (string)Dts.Variables["User::ExportPath"].Value
                                                                                , (string)Dts.Variables["User::ImportPath"].Value
                                                                                , false
                                                                                , transferOptions
                                                                            );

                    // Throw on any error
                    transferResult.Check();

                    // Print results
                    bool fireAgain = false;
                    foreach (TransferEventArgs transfer in transferResult.Transfers)
                    {
                        Dts.Events.FireInformation(0, null,
                            string.Format("Download of {0} succeeded", transfer.FileName),
                            null, 0, ref fireAgain);
                    }
                }

                Dts.TaskResult = (int)DTSExecResult.Success;
            }

            catch (Exception e)
            {
                Dts.Events.FireError(0, null,
                    string.Format("Error downloading file: {0}", e),
                    null, 0);

                Dts.TaskResult = (int)DTSExecResult.Failure;
            }
        }

        private static void SessionFileTransferProgress(object sender, FileTransferProgressEventArgs e)
        {
            //bool fireAgain = false;


            // Print transfer progress
            Console.Write("\r{0} ({1:P0})", e.FileName, e.FileProgress);

            /*Dts.Events.FireInformation(0, null,
                            string.Format("\r{0} ({1:P0})", e.FileName, e.FileProgress),
                            null, 0, ref fireAgain);*/

            // Remember a name of the last file reported
            _lastFileName = e.FileName;
        }

        private static string _lastFileName;
    }
}

推荐答案

我想出的答案非常简单.我将 SessionFileTransferProgress 从 private static void 更改为 private void.一旦这个方法不再是静态的，我就可以使用 this 来调用 Dts.Events.Fire* 方法.SessionFileTransferProgress 更改为:

The answer I figured out was pretty simple. I changed SessionFileTransferProgress from private static void to private void. Once this method was no longer static, I was able to use this to invoke the Dts.Events.Fire* methods. SessionFileTransferProgress was changed to:

private void SessionFileTransferProgress(object sender, FileTransferProgressEventArgs e)
{
    bool fireAgain = false;

    this.Dts.Events.FireInformation(0, null,
                    string.Format("\r{0} ({1:P0})", e.FileName, e.FileProgress),
                    null, 0, ref fireAgain);

    // Remember a name of the last file reported
    _lastFileName = e.FileName;
}

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