I have the function in my class, which gets querystring and returns the two dimensional object array:
Public Function GetResultsBySql(ByVal sql As String) As Object(,)
Dim b(,) As Object = Nothing
Dim Command As New MySqlCommand(sql)
Dim rowCount As Int32 = -1
Using Conn As New MySqlConnection(Me.ConnectionString)
Command.Connection = Conn
Command.CommandTimeout = TimeOut
Try
Conn.Open()
Dim Dr As MySqlDataReader = Command.ExecuteReader
Do While Dr.Read
rowCount += 1
ReDim Preserve b(Dr.FieldCount - 1, rowCount)
For j As Int16 = 0 To Dr.FieldCount - 1
b(j, rowCount) = Dr(j)
Next
Loop
Return b
Catch ex As Exception
MsgBox(ex.Message.ToString, , "GetResultsBySql")
Return Nothing
End Try
End Using ' Connection
End Function
When I provide query which originally returns 156000 records. (In toad for mysql), object array contains only 71875 records.
It's due to DataReader limits or due to leak operating memory? No exception is thrown.
Any Ideas?
Related
I connect excel to pgsql
1.install driver at:
https://www.postgresql.org/ftp/odbc/versions/msi/
2.Add a System DSN:
This is my code get database:
Public Function setDBConnectionPgsql() As Object
Set setDBConnectionPgsql = CreateObject("ADODB.Connection")
setDBConnectionPgsql.Open "DSN=PostgreSQL;Server=192.168.1.10;Port=5434;UserId=postgres;Password=123456;Database=test;"
End Function
Private Sub CommandButton1_Click()
Dim adoCn As Object
Dim dbRes As Object
Set adoCn = setDBConnectionPgsql()
Set dbRes = CreateObject("ADODB.Recordset")
dbRes.Open "SELECT * FROM mst_user", adoCn, 1, 2
Dim iRow As Integer
iRow = 1
Do While dbRes.EOF = False
ActiveSheet.Rows(iRow).Cells(1).Value = dbRes("user_id")
ActiveSheet.Rows(iRow).Cells(2).Value = dbRes("user_name")
iRow = iRow + 1
dbRes.moveNext
Loop
End Sub
Database is: "理宏"
But Result Excel display :逅・ｮ・
If Text is English, it is ok.
How can get String UTF8 when connect from Excel to Postgresql?
The cause: i had install psqlodbc_07. i had fixed by install psqlodbc_10. it is ok.
Using Visual Studio Community 2017 And AdvancedHMI to create a PC based HMI application. I have several running with no issue so moving onto something new.
On each line I have 7 array's (500 real numbers each array) and would like to capture this data daily and save to Excel.
Using EPPlus and AdvancedHMI I have the following code.
Private Sub DataSubscriber1_DataChanged(sender As Object, e As Drivers.Common.PlcComEventArgs) Handles DataSubscriber1.DataChanged
If e.ErrorId = 0 AndAlso e.Values.Count > 0 AndAlso e.Values(0) = "True" Then
Console.WriteLine("About to read the data")
Dim MyValues() As String = EthernetIPforCLXCom1.Read("VCell_1A_FES_Cycle_Average[0]", 500)
Console.WriteLine(MyValues.Length & "elements read.")
'* Transfer the values to Excel
Using ExcelPackage As New OfficeOpenXml.ExcelPackage(New System.IO.FileInfo("c:\Data.xlsx"))
For I = 0 To MyValues.Length - 1
Console.WriteLine("Element " & I & "=" & MyValues(I))
ExcelPackage.Workbook.Worksheets(1).Cells(1, I + 1).Value = MyValues(I)
Next
End Using
End If
End Sub
Running this and triggering my tag vale to execute the datascriber I get the following.
About to read the data
500Elements read.
Element 0=87.945
Exception Thrown: 'System.IndexOutOfRangeException' in EPPlus.dll
Everything looks like it should work but I am very new to VB or any type of coding for that matter. My forte' is PLC ladder logic.
Thanks.
Here is what I have working. The Datascriber has a trigger tag in the PLC. Once it's triggered it collects the array data, all 500 elements. Creates a new Excel file and writes the data to Column A, Cells 1-500
Private Sub DataSubscriber1_DataChanged(sender As Object, e As Drivers.Common.PlcComEventArgs) Handles DataSubscriber1.DataChanged
If e.ErrorId = 0 AndAlso e.Values.Count > 0 AndAlso e.Values(0) = "True" Then
Console.WriteLine("About to read the data")
Dim MyValues() As String = EthernetIPforCLXCom1.Read("VCell_1A_FES_Cycle_Average[0]", 500)
Console.WriteLine(MyValues.Length & "elements read.")
Transfer the values to Excel
Using ExcelPackage As New OfficeOpenXml.ExcelPackage(New IO.FileInfo("C:\Data.xlsx"))
ExcelPackage.Workbook.Worksheets.Add("test")
For Index = 0 To MyValues.Length - 1
Console.WriteLine("Element " & Index & "=" & MyValues(Index))
Dim ws As OfficeOpenXml.ExcelWorksheet = ExcelPackage.Workbook.Worksheets(1)
Console.WriteLine("Worksheet OK")
Dim CellNum As String = "A" & (Index + 1)
ws.Cells(CellNum).Value = MyValues(Index)
Next
ExcelPackage.Save()
End Using
End If
End Sub
In LibreOffice Basic sub I use a bunch of uno properties in an array. Which is the simplest Unostructure or UnoService that I must "embed" them, in order to use the getByName "function"?
Example:
dim props(1) as new com.sun.star.beans.PropertyValue
props(0).Name = "blahblah1"
props(0).Value = "blahblah1Value"
props(1).Name = "blahblah2"
props(1).Name = 3000
I want to be able to use something like:
b = props.getByName("blahblah2").Value
or something like (assuming I "assigned" them in a structure-like-object called "somestruct") :
b = somestruct.getprops.getByName("blahblah2").Value
As I understand that this can be done by creating a "UnoService" which supports the getByName and then, somehow, assigning these props to this service
Which is the "lightest" such service?
(I mean the service that uses less resources)
Thanks in advance.
Really supporting the interface XNameAccess is not as easy. The services which implement this interface are supposed using this interface for existing named properties, not for own created ones.
But you can use the service EnumerableMap to achieve what you probably want.
Example:
sub testEnumerableMap
serviceEnumerableMap = com.sun.star.container.EnumerableMap
oEnumerableMap = serviceEnumerableMap.create("string", "any")
oEnumerableMap.put("blahblah1", "blahblah1Value")
oEnumerableMap.put("blahblah2", 3000)
oEnumerableMap.put("blahblah3", 1234.67)
msgbox oEnumerableMap.get("blahblah1")
msgbox oEnumerableMap.get("blahblah2")
msgbox oEnumerableMap.get("blahblah3")
'msgbox oEnumerableMap.get("blahblah4") 'will throw error
msgbox oEnumerableMap.containsKey("blahblah2")
msgbox oEnumerableMap.containsValue(3000)
if oEnumerableMap.containsKey("blahblah4") then
msgbox oEnumerableMap.get("blahblah4")
end if
end sub
But starbasic with option Compatible is also able supporting Class programming like VBA does.
Example:
Create a module named myPropertySet. Therein put the following code:
option Compatible
option ClassModule
private aPropertyValues() as com.sun.star.beans.PropertyValue
public sub setProperty(oProp as com.sun.star.beans.PropertyValue)
bUpdated = false
for each oPropPresent in aPropertyValues
if oPropPresent.Name = oProp.Name then
oPropPresent.Value = oProp.Value
bUpdated = true
exit for
end if
next
if not bUpdated then
iIndex = ubound(aPropertyValues) + 1
redim preserve aPropertyValues(iIndex)
aPropertyValues(iIndex) = oProp
end if
end sub
public function getPropertyValue(sName as string) as variant
getPropertyValue = "N/A"
for each oProp in aPropertyValues
if oProp.Name = sName then
getPropertyValue = oProp.Value
exit for
end if
next
end function
Then within a standard module:
sub testClass
oPropertySet = new myPropertySet
dim prop as new com.sun.star.beans.PropertyValue
prop.Name = "blahblah1"
prop.Value = "blahblah1Value"
oPropertySet.setProperty(prop)
prop.Name = "blahblah2"
prop.Value = 3000
oPropertySet.setProperty(prop)
prop.Name = "blahblah3"
prop.Value = 1234.56
oPropertySet.setProperty(prop)
prop.Name = "blahblah2"
prop.Value = 8888
oPropertySet.setProperty(prop)
msgbox oPropertySet.getPropertyValue("blahblah1")
msgbox oPropertySet.getPropertyValue("blahblah2")
msgbox oPropertySet.getPropertyValue("blahblah3")
msgbox oPropertySet.getPropertyValue("blahblah4")
end sub
LibreOffice Basic supports the vb6 Collection type.
Dim coll As New Collection
coll.Add("blahblah1Value", "blahblah1")
coll.Add(3000, "blahblah2")
MsgBox(coll("blahblah1"))
Arrays of property values are the only thing that will work for certain UNO interfaces such as dispatcher calls. If you simply need a better way to deal with arrays of property values, then use a helper function.
Sub DisplayMyPropertyValue
Dim props(0 To 1) As New com.sun.star.beans.PropertyValue
props(0).Name = "blahblah1"
props(0).Value = "blahblah1Value"
props(1).Name = "blahblah2"
props(1).Name = 3000
MsgBox(GetPropertyByName(props, "blahblah1"))
End Sub
Function GetPropertyByName(props As Array, propname As String)
For Each prop In props
If prop.Name = propname Then
GetPropertyByName = prop.Value
Exit Function
End If
Next
GetPropertyByName = ""
End Function
XNameAccess is used for UNO containers such as Calc sheets. Normally these containers are obtained from the UNO interface, not created.
oSheet = ThisComponent.Sheets.getByName("Sheet1")
May UNO objects support the XPropertySet interface. Normally these are also obtained from the UNO interface, not created.
paraStyleName = cellcursor.getPropertyValue("ParaStyleName")
It may be possible to create a new class in Java that implements XPropertySet. However, Basic uses helper functions instead of class methods.
I think the serviceEnumerableMap is the answer (so far). Creating the values and searching them was much faster then creating props in a dynamic array and searching them with a for loop in basic.
(I do not "dare" to use "option Compatible", although I was a big fun of VB6 and VBA, because of the problems in code that maybe arise).
I used this code to test time in a form:
SUB testlala(Event)
TESTPROPS(Event)
' TESTENUM(Event)
MSGBOX "END OF TEST"
END SUB
SUB TESTENUM(Event)
DIM xcounter AS LONG
'b = now()
serviceEnumerableMap = com.sun.star.container.EnumerableMap
oEnumerableMap = serviceEnumerableMap.create("string", "any")
FOR xcounter= 0 TO 10000
oEnumerableMap.put("pr" & FORMAT(xcounter,"0000"), xcounter -10000)
NEXT
'b=now()-b
b = now()
FOR xcounter = 1 TO 5000
lala = Int((9000 * Rnd) +1)
g =oEnumerableMap.get("pr" & FORMAT(lala,"0000"))
'MSGBOX GetValueFromName(props,"pr" & FORMAT(xcounter,"0000"))
NEXT
b=now()-b
MSGBOX b*100000
END SUB
SUB TESTPROPS(Event)
DIM props()
DIM xcounter AS LONG
'b = now()
FOR xcounter= 0 TO 10000
AppendProperty(props,"pr" & FORMAT(xcounter,"0000"), xcounter -10000)
NEXT
'b=now()-b
b = now()
FOR xcounter = 1 TO 5000
lala = Int((9000 * Rnd) +1)
g = GetValueFromName(props,"pr" & FORMAT(lala,"0000"))
'MSGBOX GetValueFromName(props,"pr" & FORMAT(xcounter,"0000"))
NEXT
b=now()-b
MSGBOX b*100000
END SUB
REM FROM Andrew Pitonyak's OpenOffice Macro Information ------------------
Sub AppendToArray(oData(), ByVal x)
Dim iUB As Integer 'The upper bound of the array.
Dim iLB As Integer 'The lower bound of the array.
iUB = UBound(oData()) + 1
iLB = LBound(oData())
ReDim Preserve oData(iLB To iUB)
oData(iUB) = x
End Sub
Function CreateProperty(sName$, oValue) As com.sun.star.beans.PropertyValue
Dim oProperty As New com.sun.star.beans.PropertyValue
oProperty.Name = sName
oProperty.Value = oValue
CreateProperty() = oProperty
End Function
Sub AppendProperty(oProperties(), sName As String, ByVal oValue)
AppendToArray(oProperties(), CreateProperty(sName, oValue))
End Sub
I have a small program for some college coursework, i have to enter data of the gender and age of a group of people then work out the male and female percent and the child and adult percent. The bit i am stuck with is i want to display my results on labels on a separate form. Here is my code:
Public Class Form1
Dim TotalGender As Integer
Dim TotalAge As Integer
Dim MaleCount As Integer
Dim FemaleCount As Integer
Dim ChildCount As Integer
Dim AdultCount As Integer
Dim MalePercent As Single
Dim FemalePercent As Single
Dim AdultPercent As Single
Dim ChildPercent As Single
Private Sub btnSub_Click(sender As Object, e As EventArgs) Handles btnSub.Click
If cmbGender.Text = "Male" Then
MaleCount += 1
End If
If cmbGender.Text = "Female" Then
FemaleCount += 1
End If
If cmbAge.Text > 18 Then
ChildCount += 1
End If
If cmbAge.Text <= 18 Then
AdultCount += 1
End If
End Sub
Private Sub btnResults_Click(sender As Object, e As EventArgs) Handles btnResults.Click
Form2.Show()
MalePercent = MaleCount / TotalGender * 100
FemalePercent = FemaleCount / TotalGender * 100
AdultPercent = AdultCount / TotalAge * 100
ChildPercent = ChildCount / TotalAge * 100
End Sub
Private Sub btnReset_Click(sender As Object, e As EventArgs) Handles btnReset.Click
TotalGender = 0
TotalAge = 0
MaleCount = 0
FemaleCount = 0
ChildCount = 0
AdultCount = 0
MalePercent = 0
FemalePercent = 0
AdultPercent = 0
ChildPercent = 0
End Sub
End Class
My second form has all the labels already placed and i know how to display results on a label, i just don't know how to transfer the results across to another form
You can write on form 1 .It shows your results on form2
Form2.Label1.Text = AdultCount
Form2.Show()
I have 3 tables in a single form, they use SQL queries to select the data. I need to refresh them somehow, but nothing works.
E.g. this doesn't work at all:
oBaseContext = CreateUnoService("com.sun.star.sdb.DatabaseContext")
oDataSource = oBaseContext.getByName(dbName)
oCon = oDataSource.getConnection("", "")
oCon.getTables().refresh()
And this updates only the first table:
oDisp = createUnoService("com.sun.star.frame.DispatchHelper")
oFrame = ThisComponent.getCurrentController().getFrame()
oDisp.executeDispatch(oFrame, ".uno:Refresh", "", 0, Array())
How do I update them all?
Oh my god, it was so easy, I feel dumb now:
Sub reloadAllTables
Dim Forms : Forms = ThisComponent.DrawPage.Forms
Dim i%
For i = 0 To Forms.getCount()-1
Forms.getByIndex(i).reload()
Next
End Sub
Reloading forms doesn't refresh tables, table controls are refreshed by using .refresh on each column, for example-
SUB refreshTables(oForm as object)
DIM cnt as integer, cnt2 as integer, tot as integer, tot2 as integer
DIM oFormObj as object
'get number of form object
tot = oForm.getCount - 1
IF tot > -1 THEN
FOR cnt = 0 TO tot
'next form object
oFormObj = oForm.getByIndex(cnt)
'is object a table control AKA grid control
IF oFormObj.ImplementationName = "com.sun.star.comp.forms.OGridControlModel" THEN
'refresh each column
tot2 = oFormObj.getCount - 1
IF tot2 > -1 THEN
FOR cnt2 = 0 TO tot2
oFormObj.getByIndex(cnt2).refresh
NEXT
ENDIF
ENDIF
NEXT
ENDIF
END SUB