private void button13_Click(object sender, EventArgs e) { if (tbHandleid.Text.IsEmpty()) { var msg = "请输入handleId"; richTextBox1.AppendText(msg + "\n"); richTextBox1.Select(richTextBox1.Text.Length - msg.Length, msg.Length); richTextBox1.SelectionColor = Color.Red; return; } nuc.Live(tbHandleid.Text, LiveCallback); Log("start live"); }