Jump to content
Sign in to follow this  
Zoldex

SQLite and Listview problem. Help needed!

Recommended Posts

Zoldex

Hi everybody!

I'm trying to use SQLite for the first time into an app with a listview.

I've already succesful managed to create a database, insert and update items, also on the listview! :sweating:

My problem is about deleting records.

I mean i can easily delete a record from a database with

_SQLite_Exec(-1, "DELETE FROM Database WHERE KEY = " & $selected_row_on_listview & ";")

and also from listview with

_GUICtrlListView_DeleteItemsSelected($listview)

but the difference is that if I have 5 records into the Database and I delete 1 in the middle (say KEY=3) I will have KEY values 0,1,2,4

BUT Listview updates its rows 0,1,2,3 so I couldn't use $selected_row_on_listview anymore, since if I click on row 3 it would try to delete a missing record.

Sorry if my question sounds silly but I'm really stuck now.

Thanks for any hints and forgive my poor english.

Also, any good example with SQLite and listview would be greatly appreciated.

Edited by Zoldex

Share this post


Link to post
Share on other sites
NiVZ

Zoldex,

I read the data from the SQLite query into an array. Then I have a function that loops through the array to populate the listview.

When I delete a selected row, I delete that row number from the array (and from the database) and then re-call the function to update the listview.

That way the array always has the rows in the same order as the listview, but in the delete statement to the database I can pass the KEY that is held in one of the array columns.

Another method would be to hold the database KEY value in a hidden column in the ListView.

Hope that gives you an idea.

NiVZ

Edited by NiVZ

Share this post


Link to post
Share on other sites
Zoldex

NiVZ,

thanks for your answer.

If I understand what you say, I should read again the whole table from database to update listview, each time I delete a record?

That's what I thought when I had the problem but don't know what would happen with very large databases.

I mean that it would become a slow process if I need to delete several rows...

Another method would be to hold the database KEY value in a hidden column in the ListView.

My KEY value is not displayed on the listview and is used only as a progressive counter, that would serve me to identify the row in the database.

Anyways, even if not displayed on listview, when I delete the row from the database it's really gone forever and creates a "hole" in the counter.

The listview, instead, updates itself all the index rows...

I would need a way to tell SQLite to "reorganize" the rows when a KEY in the middle is missing... like Listview does.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

  • Similar Content

    • Eminence
      By Eminence
      Hello,
      Using SQLite, I was trying to select a specific column with having duplicate entries removed by using the DISTINCT function. 
      Local $sQuery = "SELECT DISTINCT supervisor, COUNT(DISTINCT employee_name) FROM data_db What the above snippet does is just list only one supervisor but with the total count of unique employee names in the whole database when it should be listing out all supervisor entries from the database and list the total count of employees per each supervisors. If I remove the COUNT function, it does list out all unique entries of supervisor names from the list. Attached is a screenshot of an example database as well. 
      Any help will be much appreciated. Thank you!

    • Seminko
      By Seminko
      Hey,
      I have a script that uses SQLite. It worked without a hiccup on my W7 system.
      However, last week I bought a new machine, installed W10 and autoit, and now I'm getting an error during _SQLite_Startup.
      Can anyone advise on how to find what's wrong? Tried checking $__g_hPrintCallback_SQLite but that returns nothing.
       
      Tried downloading the latest version of the dll from the link in the function page and I also replaced the default SQLite.dll.au3 that came with AutoIt with the one that came with the latest SQLite version zip.
       
      Relevant parts of my script:
      #include <SQLite.au3> #include <SQLite.dll.au3> _SQLite_Startup(@ScriptDir & "\Config\sqlite3_x64.dll", False, 1) If @error Then MsgBox(16, "SQLite Error", "SQLite3.dll Can't be Loaded! - " & $__g_hPrintCallback_SQLite & @CRLF & @CRLF & "Exiting application / Zavolej Honzovi") Exit -1 EndIf  
      Thanks
      S.
    • Bllee
      By Bllee
      every time i press "delete button" delete a line, but i can't add new line with info. the id line write normally but i can't change or add new info
      obs: looking at the "includes" one realizes that already tried of everything that knew
      my code
      #include <ButtonConstants.au3> #include <EditConstants.au3> #include <GUIConstantsEx.au3> #include <GUIListBox.au3> #include <StaticConstants.au3> #include <WindowsConstants.au3> #include <GUIConstantsEx.au3> #include <GuiImageList.au3> #include <GuiListView.au3> #include <GUIConstantsEx.au3> #include <GuiListView.au3> #include <MsgBoxConstants.au3> #include <WinAPI.au3> #include <StringConstants.au3> #include <Array.au3> #include <GuiListBox.au3> #Region ### START Koda GUI section ### Form= $Form1 = GUICreate("Form1", 612, 480, 192, 154) $MenuItem1 = GUICtrlCreateMenu("&Arquivo") $MenuItem2 = GUICtrlCreateMenuItem("Salvar Ctrl+S", $MenuItem1, $SS_CENTER) $MenuItem4 = GUICtrlCreateMenuItem("Carregar Ctrl+O", $MenuItem1, $SS_CENTER) $MenuItem3 = GUICtrlCreateMenuItem("Salvar Como Shitft+Ctrl+S", $MenuItem1, $SS_CENTER) $Group1 = GUICtrlCreateGroup("", 21, 8, 569, 97, $SS_CENTER) $Input1 = GUICtrlCreateInput("ID COR", 122, 32, 97, 21, $SS_CENTER) $Input2 = GUICtrlCreateInput("REGIÃO", 138, 64, 249, 21, $SS_CENTER) $Input3 = GUICtrlCreateInput("Label", 264, 30, 121, 21, $SS_CENTER) $Label1 = GUICtrlCreateLabel("Label", 232, 32, 30, 17, $SS_CENTER) $Button1 = GUICtrlCreateButton("Capturar Cor", 42, 30, 75, 25, $SS_CENTER) $Button2 = GUICtrlCreateButton("Capturar Região", 42, 62, 91, 25, $SS_CENTER) $Button3 = GUICtrlCreateButton("ADD", 442, 24, 113, 33) $Button5 = GUICtrlCreateButton("Delet", 442, 64, 113, 33) $Group2 = GUICtrlCreateGroup("Editar ID selecionado", 8, 384, 601, 57, $SS_CENTER) $Input7 = GUICtrlCreateInput("ID", 10, 402, 40,21, $SS_CENTER) $Input4 = GUICtrlCreateInput("COR", 51, 402, 121, 21, $SS_CENTER) $Input5 = GUICtrlCreateInput("REGIÃO", 173, 402, 249, 21, $SS_CENTER) $Input6 = GUICtrlCreateInput("LABEL", 423, 402, 121, 21, $SS_CENTER) $Button4 = GUICtrlCreateButton("\/", 544, 400, 30, 25, $SS_CENTER) $Button6 = GUICtrlCreateButton("/\", 574, 400, 30, 25, $SS_CENTER) ; Add column Global $id = Int(0) $List1 = GUICtrlCreateListView("",5, 120, 601, 253, $SS_CENTER) _GUICtrlListView_AddColumn($List1, "ID",40) _GUICtrlListView_AddColumn($List1, "COR",100) _GUICtrlListView_AddColumn($List1, "COORDENADA",305) _GUICtrlListView_AddColumn($List1, "LABEL",150) GUISetState(@SW_SHOW) #EndRegion ### END Koda GUI section ### While 1 $nMsg = GUIGetMsg() Switch $nMsg Case $GUI_EVENT_CLOSE Exit Case $MenuItem2 MsgBox($MB_SYSTEMMODAL, "ctrl + s", "Nothing Here",1) Case $MenuItem3 MsgBox($MB_SYSTEMMODAL, "shift+ctrl s", "Nothing Here",1) Case $MenuItem4 MsgBox($MB_SYSTEMMODAL, "ctrl + o", "Nothing Here",1) Case $Button1 MsgBox($MB_SYSTEMMODAL, "Capturar cor", "Aperte espaço para capturar a cor") GUICtrlSetData($Input1,MouseColor()) Case $Button2 MsgBox($MB_SYSTEMMODAL, "capturar região", "Aperte espaço para capturar a posição inicial") local $mouse = MouseGetPos() $x_init = $mouse[0] $y_init = $mouse[1] MsgBox($MB_SYSTEMMODAL, "capturar região", "Aperte espaço para capturar a posição final") local $mouse = MouseGetPos() $x_end = $mouse[0] $y_end = $mouse[1] GUICtrlSetData($Input2,$x_init&','&$y_init&' ; '&$x_end&','&$y_end) Case $Button3 _GUICtrlListView_AddItem($List1, $id, 1) ; id _GUICtrlListView_AddSubItem($List1, $id, GUICtrlRead($Input1), 1, 1) ;cor _GUICtrlListView_AddSubItem($List1, $id, GUICtrlRead($Input2), 2, 1) ;coordenada _GUICtrlListView_AddSubItem($List1, $id, GUICtrlRead($Input3), 3, 1) ;label $id= $id + 1 Case $Button4 $Item = _GUICtrlListView_GetSelectedIndices($List1) $Sid = _GUICtrlListView_GetItem($List1, Number($Item),0) $Scor = _GUICtrlListView_GetItem($List1, Number($Item),1) $Scord = _GUICtrlListView_GetItem($List1, Number($Item),2) $Slabel = _GUICtrlListView_GetItem($List1, Number($Item),3) ; get info GUICtrlSetData($Input7,$Sid[3]) GUICtrlSetData($Input4,$Scor[3]) GUICtrlSetData($Input5,$Scord[3]) GUICtrlSetData($Input6,$Slabel[3]) Case $Button5 _GUICtrlListView_DeleteItemsSelected($List1) Case $Button6 ; give back inf if GUICtrlRead($Input7) <> "ID" Then _GUICtrlListView_SetItem($List1, GUICtrlRead($Input4), GUICtrlRead($Input7),1) ;cor _GUICtrlListView_SetItem($List1, GUICtrlRead($Input5), GUICtrlRead($Input7),2) ;coordenada _GUICtrlListView_SetItem($List1, GUICtrlRead($Input6), GUICtrlRead($Input7),3) ;coordenada EndIf EndSwitch WEnd Func MouseColor() local $mouse = MouseGetPos() Return Hex(PixelGetColor($mouse[0],$mouse[1]), 6) EndFunc  
    • FrancescoDiMuro
      By FrancescoDiMuro
      Good evening everyone
      I am building a management for the company I work with, and I just imported a real amount of rows ( about 29000 ), in my SQLite DB.
      The thing I am not understanding, is the time that the script takes to build this amount of rows in the ListView.
      I didn't measure it, but I think it took 2 minutes or so to create each ListView item...
      It is normal that it takes so much time?
      What can I do to improve the creation of the items?

      Here's the code I am using to query and to create ListView items...
      ; Articles ListView: Global $lvwArticles = GUICtrlCreateListView("ID|Fornitore|Codice|Descrizione|EU|Prezzo|Sconto Applicato|Note", 14, 87, 1507, 660, BitOR($GUI_SS_DEFAULT_LISTVIEW,$LVS_SORTASCENDING,$LVS_SORTDESCENDING), BitOR($WS_EX_CLIENTEDGE,$LVS_EX_GRIDLINES,$LVS_EX_FULLROWSELECT)) ; Query $strQuery = "SELECT * FROM ARTICOLI;" ; Query Execution _SQLite_GetTable2d($objDatabase, $strQuery, $arrResult, $intRows, $intColumns) If @error Then ; Error Handling Else ; Cleaning the ListView _GUICtrlListView_DeleteAllItems($lvwArticles) If @error Then ; Error Handling Else ; No records in the Table If UBound($arrResult) < 2 Then ; Error Handling Else _GUICtrlListView_BeginUpdate($lvwArticles) For $intCounter = 1 To UBound($arrResult) - 1 $strListViewItem = $arrResult[$intCounter][0] & "|" & _ $arrResult[$intCounter][1] & "|" & _ $arrResult[$intCounter][2] & "|" & _ $arrResult[$intCounter][3] & "|" & _ $arrResult[$intCounter][4] & "|" & _ $arrResult[$intCounter][5] & "|" & _ $arrResult[$intCounter][6] & "|" & _ $arrResult[$intCounter][7] $objListViewItem = GUICtrlCreateListViewItem($strListViewItem, $lvwArticles) Next _GUICtrlListView_EndUpdate($lvwArticles) EndIf EndIf EndIf Thanks in advance


      Best Regards.
    • Sally1801
      By Sally1801
      Hello,
      i need help in deleting files from a server. The function "_FTP_DirDelete" only deletes a directory when its empty. I need to delete a non empty directory. I also can not delete the files in this directory first, because the files are PAG and DIR files in a .DAV directory and FTPEx.au3 doesnt like a directory starting with a ".".
      Any ideas?
      Thx, Sally
×