在调用ShowDialog()之后继续代码执行

private void ShowMyDialog()
{
    using (var dialog = new MyDialog())
    {
        if (dialog.ShowDialog() == DialogResult.OK)
        {
            // 用户点击了“确定”，可以继续执行后续代码
            ProcessUserInput(dialog.InputData);
        }
        else
        {
            // 用户点击了“取消”或其他关闭操作
            HandleCancel();
        }
    }
}

private void OkButton_Click(object sender, EventArgs e)
{
    try
    {
        // 处理用户输入
        ValidateInput();
        this.DialogResult = DialogResult.OK;
    }
    catch (Exception ex)
    {
        MessageBox.Show("发生错误: " + ex.Message);
    }
    finally
    {
        this.Close();
    }
}

private void ShowDialogFromThread()
{
    if (this.InvokeRequired)
    {
        this.Invoke(new MethodInvoker(ShowDialogFromThread));
    }
    else
    {
        using (var dialog = new MyDialog())
        {
            dialog.ShowDialog();
        }
    }
}