Question

我在完成BackgroundWorker流程时隐藏表单时遇到了一些麻烦。

private void submitButton_Click(object sender, EventArgs e)
{
    processing f2 = new processing();
    f2.MdiParent = this.ParentForm;
    f2.StartPosition = FormStartPosition.CenterScreen;
    f2.Show();
    this.Hide();

    backgroundWorker1.RunWorkerAsync();
}

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
    // loop through and upload our sound bits
    string[] files = System.IO.Directory.GetFiles(System.Environment.GetFolderPath(System.Environment.SpecialFolder.MyDocuments) + "\\wav", "*.wav", System.IO.SearchOption.AllDirectories);
    foreach (string soundBit in files)
    {
        System.Net.WebClient Client = new System.Net.WebClient();
        Client.Headers.Add("Content-Type", "audio/mpeg");
        byte[] result = Client.UploadFile("http://mywebsite.com/upload.php", "POST", soundBit);
    }
}

private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    formSubmitted f3 = new formSubmitted();
    f3.MdiParent = this.ParentForm;
    f3.StartPosition = FormStartPosition.CenterScreen;
    f3.Show();
    this.Hide();
}

基本上，按下“提交”按钮后，应用程序开始通过php脚本将文件上传到网络服务器。上传完成后，将触发RunWorkerCompleted方法，打开formSubmitted表单。我遇到的问题是，一旦后台工作完成并且processing直接在formSubmitted表单上打开，processing表单就不会关闭 - 而不是我想要的，关闭processing表单，然后打开formSubmitted表单。

Answer 1

实际上你永远不会关闭processing形式：

尝试以下：

private processing _processingForm;

private void submitButton_Click(object sender, EventArgs e)
{
    _processingForm = new processing();
    _processingForm.MdiParent = this.ParentForm;
    _processingForm.StartPosition = FormStartPosition.CenterScreen;
    _processingForm.Show();

    this.Hide(); //HIDES THE CURRENT FORM CONTAINING SUBMIT BUTTON

    backgroundWorker1.RunWorkerAsync();
}

现在完成隐藏processing表格：

private void backgroundWorker1_RunWorkerCompleted(object sender,
                                        RunWorkerCompletedEventArgs e)
{
    formSubmitted f3 = new formSubmitted();
    f3.MdiParent = this.ParentForm;
    f3.StartPosition = FormStartPosition.CenterScreen;

    _processingForm.Close();//CLOSE processing FORM

    f3.Show();

    this.Hide();//this REFERS TO THE FORM CONTAINING WORKER OBJECT
}

BackgroundWorker在完成后隐藏表单窗口

1 个答案: