Excel database in the PmAdo object
- When creating the object from Preconfiguration "PmAdo - ADO database"
, select the database type: Excel
and in Database connection parameters configurator select: MsExcel 2007,2011 - Provider Microsoft
or MsExcel 2003 - Provider Jet.4
- In preconfigured Database connection parameters it is necessary to modify the filename and path to database file.
is created, containing the DtiOper
method on the Methods
page. This method represents the basic inteface for working with database tables and can be used, for example, by the Preconfiguration "Panel with editable table viewer of data source"
The interface uses the ADO
technology that can be extended by additional functionality:
Create new table data with columns nTime (time), 'flags' (integer) and 'value1' (real number).
pMe.DbExecute "", "CREATE TABLE data (nTime date, flags integer, value1 double)", ""
Creating a new table (CREATE TABLE) in excel means creating a new Sheet.
Removing a table (DROP TABLE) however does not cause sheet removal, but only empties its content.
- The GetObject
method can be used for opening and getting reference to MsExcel application. Then it is possible to use the internal implementation of VBA
language (Visual Basic For Aplications) that is integrated into the Microsoft Office
for managing excel sheets and data content.
- One possible disadvantage could be the fact that reading or writing large ammounts of data can be very time consuming.
Open the file Test.xls, with included 'Sheet1'. Read the value from the "B3" cell and assign it to the variable a. Write the value of 3,14 into the "D7" cell. Display the excel application. Save and close the application.
Set oSheet = oExcelApp.Sheets("Sheet1")
a = oSheet.Cells(3,2)
oSheet.Cells(7,4) = 3.14
oExcelApp.Parent.Windows(1).Visible = true
Create new EXCEL file. Display the excel application. Create sheets (according to default Excel settings). Create a reference to the first sheet. Write values into the first sheet, save and close the application.
Dim oExcelApp, oWorkbook, oSheet
Set oWorkbook = oExcelApp.WorkBooks.Add
Set oSheet = oExcelApp.Sheets(1)
oSheet.Cells(1,1) = oWorkbook.Sheets.Count
oSheet.Cells(1,2) = 34
Additional options of VBA language usage in MsExcel
Possibility to launch MsExcel containing Macro(s)
launch the application "Test.xls" containig the "Macro1" macro
oExcelApp.Application.Run "Test.xls" & "!Macro1"
Based on the OS Windows
security settings the MsExcel macro launching is not allowed by default. If the files containing macros are to be launched, then it must be enabled in Microsoft Excel settings.