private async void button_Refresh_Click(object sender, EventArgs e) { PowerControl vPowerControl = new PowerControl(); int vTime = await vPowerControl.SendCMD_GetTime(DianYuanID); DateTime vDateTime = CommHelper.TimestampToDateTime(vTime); label_Time.Text = vDateTime.ToString("yyyy-MM-dd HH:mm:ss"); if (vTime == 0) { MessageBox.Show("获取时间失败", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error); } else { MessageBox.Show("获取时间成功", "错误", MessageBoxButtons.OK, MessageBoxIcon.Information); } }