将单个结果发布到FlowLayoutPanel而无需等待

时间:2013-09-18 16:33:29

标签: c#

我正在将项目添加到FlowLayoutPanel中。每个项目都对IP地址进行ping测试,并发布其是向上还是向下。我遇到的问题:在每个项目都有结果之前,没有任何内容被发布到FlowLayoutPanel。我希望每个项目在完成后发布,而不是等待所有项目完成。我在想可能有办法使用线程来做到这一点?我现在还不太确定。一些指导会很棒!以下是foreach循环的样子:

            string[] ipList = ipListTextBox.Text.Split(new string[] { Environment.NewLine }, StringSplitOptions.None);
            statusFlowPanel.Controls.Clear();
            statusFlowPanel.Controls.Add(p1);
            foreach (string ip in ipList)
            {;
                Label ipAddressLabel = new Label();
                ipAddressLabel.Text = ip;

                Label statusLabel = new Label();
                statusLabel.Text = "Status: ";
                statusLabel.Location = new Point(20, 10 + x);

                PictureBox updownPicBox = new PictureBox();
                updownPicBox.Height = 30;
                updownPicBox.Width = 30;
                updownPicBox.Location = new Point(80, 0);

                Ping pingSender = new Ping();
                IPAddress address = IPAddress.Parse(ip);
                PingReply reply = pingSender.Send(address);
                if (reply.Status == IPStatus.Success)
                {
                    updownPicBox.Image = Properties.Resources.up_arrow;
                }
                else
                {
                    updownPicBox.Image = Properties.Resources.down_arrow;
                }

                var ipPanel = new Panel();
                //Invoke(new Action(() => ));
                statusFlowPanel.Controls.Add(ipPanel);
                ipPanel.Controls.Add(updownPicBox);
                ipPanel.Controls.Add(statusLabel);
                ipPanel.Controls.Add(ipAddressLabel);
                ipPanel.Height = 40;
                x++;
            }

1 个答案:

答案 0 :(得分:0)

有许多方法可以解决这个问题。

这应该让你知道要采取的方向,应该在.net 4.0+下工作 - 注意主/ UI线程正在等待循环完成,所以你没有响应的UI,而这是发生了,但是这段代码会创建一个List<Task>,因此您可以按照自己喜欢的方式运行它们:

private Panel GetStatusPanel(string ip)
{
    var result = new Panel();
    result.Controls.Add(new Label { Text = ip });
    Thread.Sleep(1000); // do the ping here, populate result panel accordingly
    return result;
}

private void button1_Click(object sender, EventArgs e)
{
    var ipList = new List<string> { "127.0.0.1", "192.168.0.1", "whatever" };

    statusFlowPanel.Controls.Clear();
    var tasks = ipList.Select(ip => new Task(() => 
        BeginInvoke((MethodInvoker)delegate
            {
                statusFlowPanel.Controls.Add(GetStatusPanel(ip));
                statusFlowPanel.Refresh();
            }))
        ).ToList();

    tasks.ForEach(t => t.Start());
}

这会在ping结果进入时将状态面板添加到statusFlowPanel