#!/bin/python
#encoding=utf8
from tkinter import *
import snap7
from functools import reduceclass WidgetsDemo:def __init__(self):window = Tk()window.title("用户界面")#添加一个多选按钮和单选按钮到frame1'''frame1 = Frame(window)frame1.pack()  #看下面的解释（包管理器）self.v2 = IntVar()rbRed = Radiobutton(frame1, text = "红色", bg = "red", variable = self.v2, value = 1, command = self.processRaidobutton)rbYellow = Radiobutton(frame1, text="黄色", bg="yellow", variable=self.v2, value=2, command=self.processRaidobutton)#将cbtBold排列在frame1的网格第一行第一列（网格管理器也会在下面有解释）rbRed.grid(row=1, column=2)rbYellow.grid(row=1, column=3)'''#添加一个label、entry、button和message到frame2frame2 = Frame(window)frame2.pack()label = Label(frame2, text = "请输入IP")#label2 = Label(frame2, text="端口")label3 = Label(frame2, text="机架号")label4= Label(frame2, text="插槽号")lblDBNo = Label(frame2, text="db")lblDataSz = Label(frame2, text="数据大小(byte)")lblDataAd = Label(frame2, text="数据起始地址")btnCls=Button(frame2, text = "清屏", command = self.cearMsg, width =8)btnTstCnn=Button(frame2, text = "连接测试", command = self.testCnn, width =8)self.v1 = IntVar()btnRead = Button(frame2, text="查询数据", command=self.queryData, width =8)self.IP = StringVar()self.IP.set('192.168.100.1')self.slot=IntVar()self.rack=IntVar()self.port=IntVar()self.port.set(502)self.DBNo=IntVar()self.dataAd=IntVar()self.dataSz=IntVar()self.data=StringVar()self.msg=StringVar()self.sendTl=StringVar()self.sendTl.set("发送")entryIP = Entry(frame2, textvariable = self.IP)entryslot = Entry(frame2, textvariable=self.slot)entryrack = Entry(frame2, textvariable=self.rack)#entryport = Entry(frame2, textvariable=self.port)entryDBNo = Entry(frame2, textvariable=self.DBNo)entrydataAd = Entry(frame2, textvariable=self.dataAd)entrydataSz= Entry(frame2, textvariable=self.dataSz)self.btnSendData = Button(frame2, text = self.sendTl.get(), command = self.sendData, width =8)label.grid(row = 1, column = 1)entryIP.grid(row = 1, column = 2)#label2.grid(row=1, column=3)#entryport.grid(row=1, column=4)label3.grid(row=1, column=3)entryslot.grid(row=1, column=4)label4.grid(row=1, column=5)entryrack.grid(row=1, column=6)lblDBNo.grid(row=2, column=1)entryDBNo.grid(row=2, column=2)lblDataAd.grid(row=2, column=3)entrydataAd.grid(row=2, column=4)lblDataSz.grid(row=2, column=5)entrydataSz.grid(row=2, column=6)btnRead.grid(row=4, column=6,sticky=W)self.btnSendData.grid(row = 3, column = 6,sticky=W)btnCls.grid(row=4, column=2,sticky=W)btnTstCnn.grid(row=4,column=5)lblData = Label(frame2, text="发送数据")lblData.grid(row=3, column=1)txtData = Entry(frame2,textvariable=self.data,width = 62)txtData.grid(row=3, column=2,columnspan=4,sticky=W )# message.grid(row = 1, column = 4)#添加一个texttext = Text(window)，显示测试的相关信息self.txtMsg=Text(window)self.txtMsg.pack()self.txtMsg.insert(END, "")  #END表示插入到当前文本最后
        window.mainloop()#数据查询，查出结果为Bytestringdef queryData(self):plc = snap7.client.Client()try:plc.connect(self.IP.get(), self.rack.get(),self.slot.get())data= plc.db_read(self.DBNo.get(),self.dataAd,self.dataSz)self.txtMsg.insert(END, data)except  Exception as e:self.txtMsg.insert(END, (e, 'IP:', self.IP.get()))finally:if plc.get_connected():plc.disconnect()#清空文本框中的信息def cearMsg(self):self.txtMsg.delete(1.0, END)#连接测试def testCnn(self):plc = snap7.client.Client()try:plc.connect(self.IP.get(), self.rack.get(), self.slot.get())#if plc.get_connected:self.txtMsg.insert(END,'连接成功')plc.disconnect()except  Exception as e:self.txtMsg.insert(END, (e, 'IP:', self.IP.get(), 'Port:'))#发送数据def sendData(self):plc = snap7.client.Client()"""Here we replace a piece of data in a db block with new dataArgs:db (int): The db to usestart(int): The start within the dbsize(int): The size of the data in bytes_butearray (enumerable): The data to put in the db"""try:data = self.StrtoByesarray(self.data.get())if not data.strip():self.txtMsg.insert(END,'发送数据不能为空')returnplc.connect(self.IP.get(), self.rack.get(), self.slot.get())plc.db_write(self.DBNo, self.dataAd, data)except  Exception as e:self.txtMsg.insert(END , (e,'IP:',self.IP.get(), 'Port:'))finally:if plc.get_connected():plc.disconnect()#将bytes字符串转化为bytesdef StrtoByesarray(self,strdata):strarry = strdata.split()list = []for itm in strarry:list.append(itm)return bytearray(list)WidgetsDemo()