c# - 如何在C#中将字符串分隔成数组？

Question

我需要一些帮助来使用“;”将长字符串与文本框分开成几个不同字符串的数组。我正在编写一个简单的机器人程序，在此文本框中包含机器人运动的命令，但是当填写几个不同的 Action 时，机器人只会执行其中一个。这是盒子的代码。你对我的问题有什么建议？

public void ParseCommands(string txtS)
{
    char[] delimiterChars = { ';' };

    string text = txtS;
    System.Console.WriteLine($"Original text: '{text}'");

    string[] words = text.Split(delimiterChars);
    System.Console.WriteLine($"{words.Length} words in text:");
}

private void cmdSend_Click(object sender, EventArgs e)
{
    try
    {
        string txtS, lastMsg;
        txtS = txtSend.Text;
        byte[] bySend = Encoding.Default.GetBytes(txtS);
        byte[] byReceive = new byte[255];
        elfinSocket.Send(bySend, 0, txtS.Length, 0);
        int intReceive = elfinSocket.Receive(byReceive, 0, byReceive.Length, 0);
        Array.Resize(ref byReceive, intReceive);
        lastMsg = Encoding.Default.GetString(byReceive);
        lblRecieve.Text = lastMsg;
    }
    catch (SystemException error)
    {
        MessageBox.Show(error.Message);
    }

}

Answer 1

看来你也应该使用你已经实现的工具。将命令字符串解构为多个部分并循环发送所有部分。您应该在 ParseCommands 方法中返回数组:

public string[]ParseCommands(string txtS)
{
    char[] delimiterChars = { ';' };

    string text = txtS;
    System.Console.WriteLine($"Original text: '{text}'");

    string[] words = text.Split(delimiterChars);
    System.Console.WriteLine($"{words.Length} words in text:");
    return words;
}

private void cmdSend_Click(object sender, EventArgs e)
{
    string txtS, lastMsg;
    txtS = txtSend.Text;

    string[] commands = ParseCommands(txtS);     

    foreach (var element in commands)
    {       
        byte[] bySend = Encoding.Default.GetBytes(element);
        byte[] byReceive = new byte[255];
        elfinSocket.Send(bySend, 0, txtS.Length, 0);
        int intReceive = elfinSocket.Receive(byReceive, 0, byReceive.Length, 0);
        Array.Resize(ref byReceive, intReceive);
        lastMsg = Encoding.Default.GetString(byReceive);
        lblRecieve.Text = lastMsg;
    }
}

免责声明:似乎这将是一个持续时间更长的过程，因此您不会在标签中看到收到的响应消息的更新:

lblRecieve.Text = lastMsg;

您需要将其设为异步并将此代码放入单独的方法中。然后等待每次响应并将其写入标签。

异步版本可能如下所示:

private async void cmdSend_Click(object sender, EventArgs e)
{
    string txtS, lastMsg;
    txtS = txtSend.Text;

    string[] commands = ParseCommands(txtS);     

    foreach (var element in commands)
    {   
        string response = await Task.Run(()=>
        {   
            byte[] bySend = Encoding.Default.GetBytes(element);
            byte[] byReceive = new byte[255];
            elfinSocket.Send(bySend, 0, txtS.Length, 0);
            int intReceive = elfinSocket.Receive(byReceive, 0, byReceive.Length, 0);
            Array.Resize(ref byReceive, intReceive);
            return Encoding.Default.GetString(byReceive);
        });
        lblRecieve.Text = response;
    }
}

这应该避免卡住 GUI