在项目中需要在一定条件满足时,保存一些数据到数据库中,并可根据条件查询。考虑到WinCC6.2以后采用的就是SQL Server2005数据库,所以直接利用该数据库即可,通过SQL Server Management Studio(SSMS)可以创建自己的数据库,并安要求创建好表。

一、数据库连接

在SQL Server Management Studio(SSMS)中创建名为evcp的数据库,再创建名为evcp的表,然后根据需要创建Columns,在本项目中创建了norder(流水号)、pileno(桩号)、cardno(卡号)、operno(员工号)、energy(电量)、cost(金额)、period(时长)、rate(费率)、pdate(日期)和ptime(时间)。

在本项目中采用ODBC的方式连接数据库,首先在控制面板中创建好数据源,配置好SQL Server驱动数据源,命名为evcs。


二、数据写入

要求在一个状态量值为1的时候完成数据库的保存,等数据保存完后将状态量清0。

1、先在全局脚本VBS项目模块中创建函数savedata,代码如下:

Sub savedata
Dim objConnection
Dim objCommand
Dim objRecordset
Dim strConnectionString
Dim strSQL
Dim norder,pileno,cardno,operno,energy,cost,period,rate,pdate,ptime

norder=HMIRuntime.Tags("norder").Read
pileno= HMIRuntime.Tags("pileno").Read
cardno=HMIRuntime.Tags("cardno").Read
operno= HMIRuntime.Tags("operno").Read
energy= HMIRuntime.Tags("energy").Read
cost= HMIRuntime.Tags("cost").Read
period= HMIRuntime.Tags("period").Read
rate= HMIRuntime.Tags("rate").Read
pdate= HMIRuntime.Tags("pdate").Read
ptime= HMIRuntime.Tags("ptime").Read

strConnectionString = "Provider=MSDASQL;DSN=evcs;UID=;PWD=;"
Set objConnection = CreateObject("ADODB.Connection")
objConnection.ConnectionString = strConnectionString
objConnection.Open

Set objRecordset = CreateObject("ADODB.Recordset")
Set objCommand = CreateObject("ADODB.Command")
objCommand.ActiveConnection = objConnection

strSQL = "insert into evcp (norder,pileno,cardno,operno,energy,cost,period,rate,pdate,ptime) values ("&_
"'"&norder&"',"&_
"'"&pileno&"',"&_
"'"&cardno&"',"&_
"'"&operno&"',"&_
"'"&energy&"',"&_
"'"&cost&"',"&_
"'"&period&"',"&_
"'"&rate&"',"&_
"'"&pdate&"',"&_
"'"&ptime&"')"
'MsgBox (strSQL)
objCommand.CommandText = strSQL
objCommand.Execute

Set objCommand = Nothing
objConnection.Close
Set objRecordset = Nothing
Set objConnection = Nothing
End Sub

2、在全局脚本VBS动作中创建1秒周期的周期性出发动作,并添加如下代码:

Option Explicit
Function action
Dim v1
v1=HMIRuntime.Tags("satuse").Read

If v1 Then
Call savedata
HMIRuntime.Tags("satuse").Write 0
End if
End Function

这样当satuse值为1时系统自动保存数据

三、数据查询

数据的查询要复杂一些,需要用到MSFlexGrid控件、MS Form2 ComboBox控件和MS Form2 TextBox,这几个控件可以单独注册也可以安装VB6后自动添加。

在查询页面上添加打开页面执行脚本如下:

Sub OnOpen()                        
Dim MSFlexGrid1,cb1,tb1,tb2
Set MSFlexGrid1 = ScreenItems("控件1")
Set cb1 = ScreenItems("cb1")
Set tb1 = ScreenItems("tb1")
Set tb2 = ScreenItems("tb2")
MSFlexGrid1.Clear

MSFlexGrid1.ColWidth(0) = 620
MSFlexGrid1.ColWidth(1) = 1500
MsFlexGrid1.ColWidth(2) = 1500
MSFlexGrid1.ColWidth(3) = 1500
MSFlexGrid1.ColWidth(4) = 1500
MSFlexGrid1.ColWidth(5) = 1500
MsFlexGrid1.ColWidth(6) = 1500
MSFlexGrid1.ColWidth(7) = 1500
MSFlexGrid1.ColWidth(8) = 1600
MSFlexGrid1.ColWidth(9) = 2000
MsFlexGrid1.ColWidth(10) = 2000

MSFlexGrid1.TextMatrix(0,0) = "编号"
MSFlexGrid1.TextMatrix(0,1) = "流水号"
MSFlexGrid1.TextMatrix(0,2) = "桩号"
MSFlexGrid1.TextMatrix(0,3) = "卡号"
MSFlexGrid1.TextMatrix(0,4) = "操作员号"
MSFlexGrid1.TextMatrix(0,5) = "电量(度)"
MSFlexGrid1.TextMatrix(0,6) = "金额(元)"
MSFlexGrid1.TextMatrix(0,7) = "时长(分)"
MSFlexGrid1.TextMatrix(0,8) = "费率(元/度)"
MSFlexGrid1.TextMatrix(0,9) = "日期"
MSFlexGrid1.TextMatrix(0,10) = "时间"

MSFlexGrid1.ColAlignment(0) = 4
MSFlexGrid1.ColAlignment(1) = 4
MSFlexGrid1.ColAlignment(2) = 4
MSFlexGrid1.ColAlignment(3) = 4
MSFlexGrid1.ColAlignment(4) = 4
MSFlexGrid1.ColAlignment(5) = 4
MSFlexGrid1.ColAlignment(6) = 4
MSFlexGrid1.ColAlignment(7) = 4
MSFlexGrid1.ColAlignment(8) = 4
MSFlexGrid1.ColAlignment(9) = 4
MSFlexGrid1.ColAlignment(10) = 4

Dim i
For i= 1 To 39 Step 1
MSFlexGrid1.TextMatrix(i,0) = i
Next

cb1.Text="*"
cb1.AddItem "*"
cb1.AddItem "1"
cb1.AddItem "2"
tb1.Text="*"
tb2.Text="*"

End Sub

这段代码主要是用来初始化控件的显示。

在查询按钮加入相应的代码实现三个键值(桩号、卡号、操作员号)条件组合的查询,代码如下:

Sub Click(Byval Item)                                                                             
Dim objConnection
Dim objCommand
Dim objRecordset
Dim strConnectionString
Dim strSQL
Dim MSFlexGrid1,cb1,tb1,tb2
Dim i1,i2,cv1,cv2,cv3,cv
Set MSFlexGrid1 = ScreenItems("控件1")
Set cb1 = ScreenItems("cb1")
Set tb1 = ScreenItems("tb1")
Set tb2 = ScreenItems("tb2")

'清除原有记录
For i1 = 1 To 39 Step 1
For i2=1 To 10 Step 1
MSFlexGrid1.TextMatrix(i1, i2) =""
Next
Next
strConnectionString = "Provider=MSDASQL;DSN=evcs;UID=;PWD=;"
Set objConnection = CreateObject("ADODB.Connection")
objConnection.ConnectionString = strConnectionString
objConnection.Open
Set objRecordset = CreateObject("ADODB.Recordset")
Set objCommand = CreateObject("ADODB.Command")
objCommand.ActiveConnection = objConnection

cv1=0
cv2=0
cv3=0
If cb1.Text<>"*" Then
cv1=4
End If

If tb1.Text<>"*" Then
cv2=2
End if

If tb2.Text<>"*" Then
cv3=1
End If
cv=cv1+cv2+cv3
Select Case cv
Case 7
strSQL = "select * from evcp where pileno like '"&cb1.Text&"'And cardno like '"&tb1.Text&"'And operno like '"&tb2.Text&"'"
Case 6
strSQL = "select * from evcp where pileno like '"&cb1.Text&"'And cardno like '"&tb1.Text&"'"
Case 5
strSQL = "select * from evcp where pileno like '"&cb1.Text&"'And operno like '"&tb2.Text&"'"
Case 4
strSQL = "select * from evcp where pileno like '"&cb1.Text&"'"
Case 3
strSQL = "select * from evcp where cardno like '"&tb1.Text&"'And operno like '"&tb2.Text&"'"
Case 2
strSQL = "select * from evcp where cardno like '"&tb1.Text&"'"
Case 1
strSQL = "select * from evcp where operno like '"&tb2.Text&"'"
Case Else
strSQL = "select * from evcp"
End Select

objCommand.CommandText = strSQL
Set objRecordset = objCommand.Execute

Dim i
i=0
If (objRecordset.Bof And objRecordset.Eof) Then
MsgBox("没有符合要求的记录")
Else
While Not objRecordset.EOF
i=i+1
MSFlexGrid1.TextMatrix(i, 1) = CStr(objRecordset.Fields(0).Value)
MSFlexGrid1.TextMatrix(i, 2) = CStr(objRecordset.Fields(1).Value)
MSFlexGrid1.TextMatrix(i, 3) = CStr(objRecordset.Fields(2).Value)
MSFlexGrid1.TextMatrix(i, 4) = CStr(objRecordset.Fields(3).Value)
MSFlexGrid1.TextMatrix(i, 5) = CStr(objRecordset.Fields(4).Value)
MSFlexGrid1.TextMatrix(i, 6) = CStr(objRecordset.Fields(5).Value)
MSFlexGrid1.TextMatrix(i, 7) = CStr(objRecordset.Fields(6).Value)
MSFlexGrid1.TextMatrix(i, 8) = CStr(objRecordset.Fields(7).Value)
MSFlexGrid1.TextMatrix(i, 9) = CStr(objRecordset.Fields(8).Value)
MSFlexGrid1.TextMatrix(i, 10) = CStr(objRecordset.Fields(9).Value)
objRecordset.movenext
Wend
End If

Set objCommand = Nothing
objConnection.Close
Set objRecordset = Nothing
Set objConnection = Nothing
End Sub


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