Beispiel SqLite

stevie1401 · Beitrag von **stevie1401** » 15.05.2024 08:31

Ich habe mir einige Sqlite Videos angesehen, finde aber nichts Passendes, um es bei Purebasic anwenden zu können.
Gibt es ein schönes Purebasic-SqLite-Beispiel, bei dem man lernen kann, wie man mit Purebasic und SqLite arbeiten kann?
Also: Tabelle erstellen, einige einfache Daten reinpacken, Daten suchen und löschen/verändern?

Macros · Beitrag von **Macros** » 15.05.2024 09:02

Da findet man mit einer kurzen Google suche doch viele Beispiele.
Das schönste auf die Schnelle ist das hervorragende Tutorial von TI-994A im englischen Forum:
https://www.purebasic.fr/english/viewtopic.php?t=74764

Das kannst du ja heutzutage auch problemlos ins Deutsche Übersetzen lassen.
Schau nur, dass die die Codes dann aus dem original kopierst, sonst steht da plötzlich

EINFÜGE IN Kontakte
UPDATE Kontakte SETZE Adresse='Gary, Indiana, USA.' WO name='Michael Jackson'
usw

mk-soft · Beitrag von **mk-soft** » 15.05.2024 10:54

Zum Testen vom SQLite befehlen habe ich diesen Basis Code mir erstellt.
Damit kann man schnell mal etwas ausprobieren.

Code: Alles auswählen

;-TOP

; Comment : ShowDatabaseItems
; Author  : mk-soft
; Version : v1.03.2
; Create  : 12.02.2017
; Update  : 15.04.2024

EnableExplicit

; ***************************************************************************************

Procedure.s ColumnTypeString(Type)
  Protected r1.s
  Select Type
    Case #PB_Database_Long
      r1 = "Long"
    Case #PB_Database_Quad
      r1 = "Quad"
    Case #PB_Database_Float
      r1 = "Float"
    Case #PB_Database_Double
      r1 = "Double"
    Case #PB_Database_String
      r1 = "String"
    Case #PB_Database_Blob
      r1 = "Blob"
  EndSelect
  ProcedureReturn r1
EndProcedure

; ---------------------------------------------------------------------------------------

Procedure GetTextWidth(Text.s, FontID.i = 0)
  Static image
  Protected result
  
  If Not image
    image = CreateImage(#PB_Any, 1, 1)
  EndIf
  
  If image And StartDrawing(ImageOutput(image))
    If FontID
      DrawingFont(FontID)
    EndIf
    result = TextWidth(Text)
    StopDrawing()
  EndIf
  ProcedureReturn result
EndProcedure

; ---------------------------------------------------------------------------------------

Procedure ClearGadgetColumns(Gadget)
  CompilerIf #PB_Compiler_Version <= 551
    ClearGadgetItems(Gadget)
    While GetGadgetItemText(Gadget, -1, 0)
      RemoveGadgetColumn(Gadget, 0)
    Wend
  CompilerElse
    RemoveGadgetColumn(Gadget, #PB_All)
  CompilerEndIf
EndProcedure

; ---------------------------------------------------------------------------------------

Procedure CountGadgetColumns(Gadget)
  Protected result
  CompilerIf #PB_Compiler_Version <= 551
    While GetGadgetItemText(Gadget, -1, result)
      result + 1
    Wend
  CompilerElse
    result = GetGadgetAttribute(Gadget, #PB_ListIcon_ColumnCount)
  CompilerEndIf
  ProcedureReturn result
EndProcedure

; ---------------------------------------------------------------------------------------

Procedure FitColumnWidth(Gadget, Column = #PB_All)
  Protected columns, rows, col, row, width, max, dx
  Static help_gadget
  
  CompilerIf #PB_Compiler_OS = #PB_OS_Windows
    If Column = #PB_All
      columns = CountGadgetColumns(Gadget) - 1
      For col = 0 To columns
        SendMessage_(GadgetID(Gadget), #LVM_SETCOLUMNWIDTH, col, #LVSCW_AUTOSIZE_USEHEADER)
      Next
    Else
      SendMessage_(GadgetID(Gadget), #LVM_SETCOLUMNWIDTH, Column, #LVSCW_AUTOSIZE_USEHEADER)
    EndIf
    
  CompilerElse
    rows = CountGadgetItems(Gadget) - 1
    dx = GetTextWidth("X", GetGadgetFont(Gadget))
    If Column = #PB_All
      columns = CountGadgetColumns(Gadget) - 1
      For col = 0 To columns
        For row = -1 To rows
          width = Len(GetGadgetItemText(Gadget, row, col))
          If width > max
            max = width
          EndIf
        Next
        max + 1
        width = max * dx + 4
        SetGadgetItemAttribute(Gadget, 0, #PB_ListIcon_ColumnWidth, width, col)
        width = 0
        max = 0
      Next
    Else
      For row = -1 To rows
        width = Len(GetGadgetItemText(Gadget, row, Column))
        If width > max
          max = width
        EndIf
      Next
      max + 1
      width = max * dx + 4
      SetGadgetItemAttribute(Gadget, 0, #PB_ListIcon_ColumnWidth, width, Column)
    EndIf
    
  CompilerEndIf
  
EndProcedure

Procedure ShowDatabaseRows(Gadget, DBase, NbDecimals = 0, Hide = #False)
  Protected result.i, columns.i, index.i, size.i, text.s, fltVal.f, dblVal.d
  
  Repeat ; Do
    If GadgetType(Gadget) <> #PB_GadgetType_ListIcon
      Break
    EndIf
    If Not IsDatabase(DBase)
      Break
    EndIf
    HideGadget(Gadget, Hide)
    ClearGadgetItems(Gadget)
    ClearGadgetColumns(Gadget)
    columns = DatabaseColumns(DBase) - 1
    Dim ColumnType(columns)
    For index = 0 To columns
      ColumnType(index) = DatabaseColumnType(DBase, index)
      text = DatabaseColumnName(DBase, index)
      size = GetTextWidth(text) + 12
      AddGadgetColumn(Gadget, index, text, size)
    Next
    While NextDatabaseRow(DBase)
      text = ""
      For index = 0 To columns
        Select ColumnType(index)
          Case #PB_Database_Float
            fltVal = GetDatabaseFloat(DBase, index)
            text + FormatNumber(fltVal, NbDecimals) + #LF$
          Case #PB_Database_Double
            dblVal = GetDatabaseDouble(DBase, index) ; <- Bug Linux
            text + FormatNumber(dblVal, NbDecimals) + #LF$
          Default
            text + GetDatabaseString(DBase, index) + #LF$
        EndSelect
      Next
      AddGadgetItem(Gadget, -1, text)
    Wend
    FinishDatabaseQuery(DBase)
    HideGadget(Gadget, #False)
    result = CountGadgetItems(Gadget)
  Until #True
  ProcedureReturn result
  
EndProcedure

; ***************************************************************************************

CompilerIf #PB_Compiler_IsMainFile
  
  ; Constant
  Enumeration ;Window
    #Main
  EndEnumeration
  
  Enumeration ; Menu
    #Menu
  EndEnumeration
  
  Enumeration ; MenuItems
    #MenuExitApplication
  EndEnumeration
  
  Enumeration ; Gadgets
    #List
    #Edit
  EndEnumeration
  
  Enumeration ; Statusbar
    #Status
  EndEnumeration
  
  ; Global Variable
  Global ExitApplication
  
  ; Functions
  
  UseSQLiteDatabase()
  
  Procedure CheckDatabaseUpdate(Database, Query$)
    Protected Result = DatabaseUpdate(Database, Query$)
    If Result = 0
      Debug DatabaseError()
    EndIf
    ProcedureReturn Result
  EndProcedure
  
  Procedure CreateDummyDatabase(DBase)
    Protected dbName.s
    If 0
      dbName = GetUserDirectory(#PB_Directory_Downloads) + "dbTest.db"
      CreateFile(0, dbName)
      CloseFile(0)
    Else
      dbName = ":memory:"
    EndIf
    If OpenDatabase(DBase, dbName, "", "")
      CheckDatabaseUpdate(DBase, "CREATE TABLE food (recid INTEGER PRIMARY KEY ASC, name CHAR(50), weight REAL, date DATETIME)")
      CheckDatabaseUpdate(DBase, "INSERT INTO food (name, weight, date) VALUES ('apple', '10.005', current_timestamp)")
      CheckDatabaseUpdate(DBase, "INSERT INTO food (name, weight, date) VALUES ('pear', '5.9', '1900-01-01 12:00:00')")
      CheckDatabaseUpdate(DBase, "INSERT INTO food (name, weight, date) VALUES ('banana', '20.35', '2400-12-31 12:00:00')")
      ; DateTime as quad
      SetDatabaseQuad(DBase, 0, Date())
      CheckDatabaseUpdate(DBase, "INSERT INTO food (name, weight, date) VALUES ('cherry', '10.00', datetime(?, 'unixepoch', 'localtime'))")
    Else
      Debug "Can't open database !"
    EndIf
  EndProcedure
  
  Procedure UpdateWindow()
    Protected x, y, dx, dy, menu, status
    
    menu = MenuHeight()
    If IsStatusBar(#Status)
      status = StatusBarHeight(#Status)
    Else
      status = 0
    EndIf
    x = 0
    y = 0
    dx = WindowWidth(#Main)
    dy = WindowHeight(#Main) - menu - status
    ResizeGadget(#List, x, y, dx, dy)
  EndProcedure
  
  ; Main
  Procedure Main()
    Protected event, style, dx, dy, count
    
    style = #PB_Window_SystemMenu | #PB_Window_MinimizeGadget | #PB_Window_MaximizeGadget | #PB_Window_SizeGadget
    dx = 800
    dy = 600
    
    If OpenWindow(#Main, #PB_Ignore, #PB_Ignore, dx, dy, "Main", style)
      
      ; Menu
      CreateMenu(#Menu, WindowID(#Main))
      MenuTitle("Ablage")
      MenuItem(#MenuExitApplication, "Be&enden")
      
      CompilerIf #PB_Compiler_OS = #PB_OS_MacOS 
        ; Mac default menu
        If Not IsMenu(#Menu)
          CreateMenu(#Menu, WindowID(#Main))
        EndIf
        MenuItem(#PB_Menu_About, "")
        MenuItem(#PB_Menu_Preferences, "")
      CompilerEndIf
      
      ; Gadgets
      #ListIconFlags = #PB_ListIcon_AlwaysShowSelection | #PB_ListIcon_FullRowSelect | #PB_ListIcon_GridLines
      ListIconGadget(#List, 0, 0, dx, dy, "recid", 100, #ListIconFlags)
      
      ; Statusbar
      CreateStatusBar(#Status, WindowID(#Main))
      AddStatusBarField(#PB_Ignore)
      
      UpdateWindow()
      
      ;-Test database
      CreateDummyDatabase(0)
      
      If DatabaseQuery(0, "SELECT * FROM food")
      ;If DatabaseQuery(0, "SELECT * FROM sqlite_master")
        count = ShowDatabaseRows(#List, 0, 3)
        StatusBarText(#Status, 0, "Items: " + count)
      EndIf
      
      FitColumnWidth(#List)
      
      ; Main Loop
      Repeat
        event = WaitWindowEvent()
        Select event
          Case #PB_Event_Menu
            Select EventMenu()
                CompilerIf #PB_Compiler_OS = #PB_OS_MacOS
                  
                Case #PB_Menu_About
                  
                Case #PB_Menu_Preferences
                  
                Case #PB_Menu_Quit
                  ExitApplication = #True
                  
                CompilerEndIf
                
              Case #MenuExitApplication
                ExitApplication = #True
                
            EndSelect
            
          Case #PB_Event_Gadget
            Select EventGadget()
              Case #List
                
            EndSelect
            
          Case #PB_Event_SizeWindow
            Select EventWindow()
              Case #Main
                UpdateWindow()
                
            EndSelect
            
          Case #PB_Event_CloseWindow
            Select EventWindow()
              Case #Main
                ExitApplication = #True
                
            EndSelect
            
        EndSelect
        
      Until ExitApplication
      
    EndIf
    
  EndProcedure : Main()
  
  End
  
CompilerEndIf

stevie1401 · Beitrag von **stevie1401** » 15.05.2024 11:07

1a!
Vielen lieben Dank!

PureBoard

Beispiel SqLite

Beispiel SqLite

Re: Beispiel SqLite

Re: Beispiel SqLite

Re: Beispiel SqLite