Question

我正在寻找和阅读有关如何解决这些问题的论坛。经过一天的尝试，我仍然不知如何解决我的问题。我正在上传文件，需要在文本框中返回％。我对上传部分没有任何问题，如果我将所有代码都包含在同一个类中，则使用BackgroundWorker返回值没有任何问题。但是，我正在做的是从form1调用ftp类。我需要ftp类将百分比返回到form1，这样我就可以在我的UI中显示，还需要从我的ftp类返回的服务器响应代码显示在我的form1中。在我尝试在BackgroundWorker进程中运行此操作之前，一切正常，但除了UI变得无响应并在上载完成后返回所有状态消息之外。继承了我现在的代码。如何从ftp类中获取百分比并将其传递回form1，以及服务器响应代码一旦完成？

public partial class Form1 : Form
{
    private BackgroundWorker bw = new BackgroundWorker();
    private string ftpServer = @"ftp://10.0.0.0";
    private string ftpUser = @"user";
    private string ftpPass = @"pass";
    private string ftpRemoteFile = @"myfile.exe";
    private string ftpLocalFile = @"C:\Uploads\file.exe";

    public Form1()
    {
        InitializeComponent();
        bw.WorkerReportsProgress = true;
        bw.DoWork += new DoWorkEventHandler(bw_DoWork);
        bw.ProgressChanged += new ProgressChangedEventHandler(bw_ProgressChanged);
        bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bw_RunWorkerCompleted);
    }

    private void sendButton_Click(object sender, EventArgs e)
    {
        progressRichTextBox.Text = "Sending";
        if (bw.IsBusy != true)
        {
            bw.RunWorkerAsync();
        }
    }

    private void bw_DoWork(object sender, DoWorkEventArgs e)
    {
        BackgroundWorker worker = sender as BackgroundWorker;

        ftp ftpClient = new ftp(ftpServer, ftpUser, ftpPass);
        ftpClient.upload(progressRichTextBox, ftpRemoteFile, ftpLocalFile);
    }
    private void bw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
        if (!(e.Error == null))
        {
            this.progressRichTextBox.Text = ("Error: " + e.Error.Message);
        }

        else
        {
            this.progressRichTextBox.Text = "Done!";
        }
    }
    private void bw_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        this.progressRichTextBox.Text = (e.ProgressPercentage.ToString() + "%");
    }
}

继承了ftp类：

    public void upload(System.Windows.Forms.RichTextBox progressRichTextBox, string remoteFile, string localFile)
    {

        FileInfo fileInfo = new FileInfo(localFile);
        /* Create an FTP Request */
        ftpRequest = (FtpWebRequest)FtpWebRequest.Create(host + "/" + remoteFile);
        /* Log in to the FTP Server with the User Name and Password Provided */
        ftpRequest.Credentials = new NetworkCredential(user, pass);
        /* Specify generic group name for faster upload */
        ftpRequest.ConnectionGroupName = "AffiliateUpload";
        /* Specify the Type of FTP Request */
        ftpRequest.Method = WebRequestMethods.Ftp.UploadFile;
        /* Server connection options */
        ftpRequest.UseBinary = true;
        ftpRequest.UsePassive = true;
        ftpRequest.KeepAlive = true;
        ftpRequest.ContentLength = fileInfo.Length;
        /* Buffer for the Data */
        byte[] buff = new byte[bufferSize];
        int contentLen;
        /* Open a File Stream to Read the File for Upload */
        FileStream localFileStream = fileInfo.OpenRead();

        try
        {
            // Stream to which the file to be upload is written
            ftpStream = ftpRequest.GetRequestStream();

            // Read from the file stream 2kb at a time
            contentLen = localFileStream.Read(buff, 0, bufferSize);

            // Till Stream content ends
            while (contentLen != 0)
            {
                // Write Content from the file stream to the 
                // FTP Upload Stream
                ftpStream.Write(buff, 0, contentLen);
                contentLen = localFileStream.Read(buff, 0, bufferSize);
            }

            // Close the file stream and the Request Stream
            ftpStream.Close();
            localFileStream.Close();
            ftpRequest = null;
        }
        catch (Exception ex)
        {
            Console.WriteLine("Failed sending to " + host + "/" + remoteFile + " (" + ex.Message + ")");
        }
    }

Answer 1

您不需要在上传方法中更新progressRichTextBox。删除该参数。您需要为上传方法提供worker对象，并在其上调用worker.ReportProgress。

来自不同类的BackgroundWorker ReportProgress

1 个答案: