private void toolStripButton2_Click(object sender, EventArgs e) { btnNextStep.Text = "下一步"; txtSerialNum.Text = ""; demarcateDataUploadForm.CloseSerialPort(); qRCodePrintForm.Close(); pageNum = 1; toolStripButton1.Enabled = true; foreach (Control c in panel2.Controls) { c.Visible = true; } demarcateDataUploadForm.Visible = false; //demarcateDataUploadForm.setOperatorFormBtnDelegate -= new setFormBtnDelegate(setFormComBtn); //demarcateDataUploadForm = new DemarcateDataUploadForm(); qRCodePrintForm = new QRCodePrintForm(); //demarcateDataUploadForm.setOperatorFormBtnDelegate += new setFormBtnDelegate(setFormComBtn); }