OpenOffice.org BASIC Guide - OpenOffice.org wiki

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Data Sources Command (String) SQL command (typically a SELECT command) The following example shows how a query object can be created in a program-controlled manner and can be assigned to a data source. Dim DatabaseContext As Object Dim DataSource As Object Dim QueryDefinitions As Object Dim QueryDefinition As Object Dim I As Integer DatabaseContext = createUnoService("com.sun.star.sdb.DatabaseContext") DataSource = DatabaseContext.getByName("Customers") QueryDefinitions = DataSource.getQueryDefinitions() QueryDefinition = createUnoService("com.sun.star.sdb.QueryDefinition") QueryDefinition.Command = "SELECT * FROM Customer" QueryDefinitions.insertByName("NewQuery", QueryDefinition) The query object is first created using the createUnoService call, then initialized, and then inserted into the QueryDefinitions object by means of insertByName. Database Access A database connection is needed for access to a database. This is a transfer channel which permits direct communication with the database. Unlike the data sources presented in the previous section, the database connection must therefore be re-established every time the program is restarted. OpenOffice.org provides various ways of establishing database connections. This example shows how to connect to an existing data source. Dim DatabaseContext As Object Dim DataSource As Object Dim Connection As Object Dim InteractionHandler as Object DatabaseContext = createUnoService("com.sun.star.sdb.DatabaseContext") DataSource = DatabaseContext.getByName("Customers") If Not DataSource.IsPasswordRequired Then Connection = DataSource.GetConnection("","") Else InteractionHandler = createUnoService("com.sun.star.sdb.InteractionHandler") Connection = DataSource.ConnectWithCompletion(InteractionHandler) End If The code used in the example first checks whether the database is password protected. If not, it creates the database connection required using the GetConnection call. The two empty strings in the command line stand for the user name and password. If the database is password protected, the example creates an InteractionHandler and opens the database connection using the ConnectWithCompletion method. The InteractionHandler ensures that OpenOffice.org asks the user for the required login data. Iteration of Tables A table is usually accessed in OpenOffice.org through the ResultSet object. A ResultSet is a type of marker that indicates a current set of data within a volume of results obtained using the SELECT command. This example shows how a ResultSet can be used to query values from a database table. Dim DatabaseContext As Object Dim DataSource As Object Dim Connection As Object Dim InteractionHandler as Object 146 OpenOffice.org 3.2 BASIC Guide · March 2010
Dim Statement As Object Dim ResultSet As Object DatabaseContext = createUnoService("com.sun.star.sdb.DatabaseContext") DataSource = DatabaseContext.getByName("Customers") If Not DataSource.IsPasswordRequired Then Connection = DataSource.GetConnection("","") Else InteractionHandler = createUnoService("com.sun.star.sdb.InteractionHandler") Connection = DataSource.ConnectWithCompletion(InteractionHandler) End If Statement = Connection.createStatement() ResultSet = Statement.executeQuery("SELECT ""CustomerNumber"" FROM ""Customer""") If Not IsNull(ResultSet) Then While ResultSet.next MsgBox ResultSet.getString(1) Wend End If Database Access Once the database connection has been established, the code used in the example first uses the Connection.createObject call to create a Statement object. This Statement object then uses the executeQuery call to return the actual ResultSet. The program now checks whether the ResultSet actually exists and traverses the data records using a loop. The values required (in the example, those from the CustomerNumber field) returns the ResultSet using the getString method, whereby the parameter 1 determines that the call relates to the values of the first column. Note – VBA : The ResultSet object from SDBC is comparable with the Recordset object from DAO and ADO, since this also provides iterative access to a database. Note – StarOffice 5 : The database is actually accessed in OpenOffice.org through a ResultSet object. This reflects the content of a table or the result of a SQL-SELECT command. In the past, the ResultSet object provided the resident methods in the Application object for navigation within the data, for example, DataNextRecord ). Type-Specific Methods for Retrieving Values As can be seen in the example from the previous section, OpenOffice.org provides a getString method for accessing table contents. The method provides the result in the form of a string. The following get methods are available: getByte() supports the SQL data types for numbers, characters and strings getShort() getInt() getLong() supports the SQL data types for numbers, characters and strings supports the SQL data types for numbers, characters and strings supports the SQL data types for numbers, characters and strings getFloat() supports the SQL data types for numbers, characters and strings getDouble() supports the SQL data types for numbers, characters and strings getBoolean() supports the SQL data types for numbers, characters and strings Chapter 10 · Databases 147
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OpenOffice.org 3.2 BASIC Guide
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3 1 2 3 4 Contents Copyright.......
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Preface This guide provides an intr
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About OpenOffice.org Basic and allo
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Overview of a Basic Program In addi
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Working With Variables example, in
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Numbers with long integer variables
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Numbers return incorrect values. Th
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Arrays Dim MyInteger(3) creates 4 i
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Scope and Life Span of Variables Sc
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Constants Const A = 10 You can also
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Branching B = 0 End If In this exam
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Loops use an explicit counter like
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Procedures and Functions ' ... here
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Procedures and Functions The exampl
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Error Handling The following code i
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Other Instructions End Sub & "Text:
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Conversion Functions calculates the
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Conversion Functions IsBoolean = Fa
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Strings Formatting Strings The Form
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Date and Time The Weekday function
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Files and Directories Note - VBA :
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Files and Directories The FreeFile
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Message and Input Boxes Display of
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Other Functions specifies the same
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Universal Network Objects (UNO) com
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Tools for Working with UNO The foll
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Overview of Central Interfaces basi
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5 C H A P T E R 5 5 Working with
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XML File Format The StarDesktop Ope
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The StarDesktop The FileProperties
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The options of the print method The
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Doc = ThisComponent StyleFamilies =
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6 C H A P T E R 6 6 Text Documen
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described in Search and Replace. Th
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Paragraph Properties The Structure
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If TextElement.supportsService("com
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isEndOfSentence () returns True if
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Doc.Text.insertControlCharacter(Cur
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Dim Replace As Object Dim BritishWo
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More Than Just Text Note - Text tab
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Doc.Text.insertTextContent(Cursor,
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frame objects are set to the starti
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The following example shows how the
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7 C H A P T E R 7 7 Spreadsheet
Page 91 and 92: The same interface provides methods
Page 93 and 94: Cell = Sheet.getCellByPosition(0, 0
Page 95 and 96: StartColumn (long) first column in
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Page 99 and 100: NumberFormatId = NumberFormats.addN
Page 101 and 102: ShadowFormat (struct) The Structure
Page 103 and 104: FooterBottomBorderDistance (long) d
Page 105 and 106: Definition of Elements to be Printe
Page 107 and 108: VARP variance based on the total po
Page 109 and 110: 8 C H A P T E R 8 8 Drawings and
Page 111 and 112: Doc = ThisComponent Page = Doc.Draw
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Page 115 and 116: The lines are dark gray (Color) and
Page 117 and 118: service. Dim Doc As Object Dim Page
Page 119 and 120: An Overview of Various Drawing Obje
Page 121 and 122: Page.add(LineShape) Polypolygon Sha
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Page 125 and 126: Point.x = 1000 Point.y = 1000 Size.
Page 127 and 128: Pause (long) the amount of time tha
Page 129 and 130: Using Charts in Spreadsheets The pr
Page 131 and 132: The Structure of Charts com.sun.sta
Page 133 and 134: The Structure of Charts Min (Double
Page 135 and 136: The Structure of Charts HasZAxisGri
Page 137 and 138: The Structure of Charts The followi
Page 139 and 140: 10 C H A P T E R 1 0 10 Database
Page 141: User (String) user name Password (S
Page 145 and 146: FORWARD_ONLY ResultSet only permits
Page 147 and 148: 11 C H A P T E R 1 1 11 Dialogs
Page 149 and 150: Closing With the Close Button in th
Page 151 and 152: Multi-Page Dialogs Properties A dia
Page 153 and 154: Control element-specific events: Ev
Page 155 and 156: Buttons (short) X (long) Y (long) b
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Page 159 and 160: Model.Label (String) label that is
Page 161 and 162: Model.HScroll (Boolean) the text ha
Page 163 and 164: 12 C H A P T E R 1 2 12 Forms In
Page 165 and 166: Accessing the View of Control Eleme
Page 167 and 168: Tag (String) Control Element Forms
Page 169 and 170: Enabled (Boolean) the control eleme
Page 171 and 172: LineCount (Short) number of lines o
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