Question

我正在尝试在Windows窗体应用程序中使用进度条，该应用程序将在成功完成后验证登录凭据，它显示另一种窗体，但由于必须显示而无法显示任何内容，因此无法显示它。瞬间让我回到了原始形式取消按钮也不起作用请任何人都可以给我解决这个问题的方法

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
    if(textBox1.Text == "Abrar" && textBox2.Text=="abrar")
    {

        //progressBar1.Visible = true;
        backgroundWorker1.ReportProgress(i);
        Thread.Sleep(3000);
        backgroundWorker1.ReportProgress(i * 2);
        Thread.Sleep(3000);

        backgroundWorker1.ReportProgress(i * 3);
        Thread.Sleep(3000);
        backgroundWorker1.ReportProgress(i * 4);
        Form2 f = new Form2();
        f.Show();
        Form1 d1 = new Form1();

        d1.Hide();



    }
    if(backgroundWorker1.CancellationPending)
    {
        e.Cancel = true;
        backgroundWorker1.ReportProgress(0);
        return;
    }

}

private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    progressBar1.Value = e.ProgressPercentage;

}

private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    if(e.Cancelled)`enter code here`
    {
        label3.Text = "Cancelled";
    }
    else
    {
        label3.Text = "Login Successful";
    }
}

private void Login_Click(object sender, EventArgs e)
{
    if(!backgroundWorker1.IsBusy)
    {
        backgroundWorker1.RunWorkerAsync();


    }
    else if(backgroundWorker1.IsBusy)
    {
        label3.Text = "Process is running";
    }

}

private void Form1_Load(object sender, EventArgs e)
{
   // progressBar1.Visible = false;
}

private void Cancel_Click(object sender, EventArgs e)
{
    if(backgroundWorker1.IsBusy)
    {
        backgroundWorker1.CancelAsync();

    }
}

Answer 1

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
    if(textBox1.Text == "Abrar" && textBox2.Text=="abrar")
    {

        //progressBar1.Visible = true;
        backgroundWorker1.ReportProgress(i);
        Thread.Sleep(3000);
        backgroundWorker1.ReportProgress(i * 2);
        Thread.Sleep(3000);

        backgroundWorker1.ReportProgress(i * 3);
        Thread.Sleep(3000);
        backgroundWorker1.ReportProgress(i * 4);



    }
    if(backgroundWorker1.CancellationPending)
    {
        e.Cancel = true;
        backgroundWorker1.ReportProgress(0);
        return;
    }

}

private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    progressBar1.Value = e.ProgressPercentage;

}

private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    if(e.Cancelled)`enter code here`
    {
        label3.Text = "Cancelled";
    }
    else
    {
        label3.Text = "Login Successful";
        Form2 f = new Form2();
        f.Show();
        Form1 d1 = new Form1();
        d1.Hide();
        this,Hide();
    }
}

private void Login_Click(object sender, EventArgs e)
{
    if(!backgroundWorker1.IsBusy)
    {
        backgroundWorker1.RunWorkerAsync();


    }
    else if(backgroundWorker1.IsBusy)
    {
        label3.Text = "Process is running";
    }

}

private void Form1_Load(object sender, EventArgs e)
{
   // progressBar1.Visible = false;
}

private void Cancel_Click(object sender, EventArgs e)
{
    if(backgroundWorker1.IsBusy)
    {
        backgroundWorker1.CancelAsync();

    }
}

登录验证成功后无法显示第二个表单

1 个答案: