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EAccessViolation hatası

Nereden Yazdırıldığı: Clomosy | Forum
Kategori: Genel Programlama
Forum Adı: Clomosy ile değişken kullanımı
Forum Tanımlaması: TRObject dili ile değişken tanımlaması ve ekranda gösterme
URL: https://forum.clomosy.com.tr/forum_posts.asp?TID=1314
Tarih: 12 Şubat 2026 Saat 17:31
Program Versiyonu: Web Wiz Forums 12.07 - https://www.webwizforums.com


Konu: EAccessViolation hatası
Mesajı Yazan: Melih
Konu: EAccessViolation hatası
Mesaj Tarihi: 12 Şubat 2026 Saat 14:07
Veritabanımdan veri çekmeye çalışırken EAccessViolation hatası alıyorum. Veriyi çekerken kullandığım query ve veritabanımı githubdan aldığım kodun içindekilerle değiştirdiğimde düzgün çalışıyor fakat kendi kodumda neden çalışmadığını anlamadım.
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var
MyForm: TclForm;
addNewTaskButton: TClProButton;

bottomPanel: TCLPanel;
middlePanel: TCLPanel;
topPanel: TCLPanel;

toDoIcon: TCLImage;

insertQuery: TclSqlQuery;

ToDoListView: TClProListView;
retrieveButton: TCLButton;

void onAddButtonClick;
{
  Clomosy.RunUnit('uCreateToDo');
}
void onIconClick;
{
  Clomosy.RunUnit('uToDoList');
}

void retrieveCurrentDayItems;
var Qry :TClSQLiteQuery;

var dayNow: String;
{
  dayNow = FormatDateTime('dd.mm.yyyy',Now);
  try
    qry = nil;
    Qry = Clomosy.DBSQLiteQueryWith('SELECT * FROM todo_items WHERE due_date = '+QuotedStr(dayNow)+' ORDER BY CAST(item_order AS INTEGER) ASC;');

    Qry.OpenOrExecute;
    
    while (not Qry.EOF)
    {
      if(ToDoListView <> nil)
        ToDoListView.clLoadProListViewDataFromDataset(Qry);
        else ShowMessage('not created');
    }
  except
    ShowMessage('retrieveCurrentDayItems Exception Class: '+LastExceptionClassName+' Exception GetData Message: '+LastExceptionMessage);
  }
}

void SqLiteConnection;
var
  TableExists: Boolean;
{
  try
  
    Clomosy.DBSQLiteConnect(Clomosy.AppFilesPath + 'DBToDoApp.db3', '');

    Clomosy.DBSQLiteQuery.Sql.Text = 'SELECT name FROM sqlite_master WHERE type="table" AND name="todo_items";';
    Clomosy.DBSQLiteQuery.OpenOrExecute;
    
    TableExists = not Clomosy.DBSQLiteQuery.Eof;
    
    if not (TableExists)
    {
      ToDoListView.clearList;
      ShowMessage('Table does not exist');
    } else
    {
      ShowMessage('Dddatabase connected and table exists');
      retrieveCurrentDayItems;
    }
    except
      ShowMessage('connectionfunc Exception Class: '+LastExceptionClassName+' Exception Message: '+LastExceptionMessage);
  }
}

{
  MyForm=TclForm.Create(self);
  
  MyForm.LytTopBar.Visible = False;
  
  topPanel=MyForm.AddNewPanel(MyForm,'topPanel');
  topPanel.Align=alMostTop;
  topPanel.Height=110;
  
  middlePanel=MyForm.AddNewPanel(MyForm, 'middlePanel');
  middlePanel.Align=alCenter;
  middlePanel.Height=350;
  
  bottomPanel=MyForm.AddNewPanel(MyForm,'bottomPanel');
  bottomPanel.Height=110;
  bottomPanel.Align=alMostBottom;
  bottomPanel.StyleLookup='pushpanel';

  

  ToDoListView = MyForm.AddNewProListView(middlePanel,'ToDoListView');
  ToDoListView.Align = alCenter;
  ToDoListView.Width = MyForm.clWidth/2;
  ToDoListView.Margins.Right = 10;
  ToDoListView.Margins.Bottom = 10;
  ToDoListView.Margins.Left = 10;
  ToDoListView.clProSettings.ViewType = lvWaterFall;
  ToDoListView.clProSettings.IsRound = True;
  ToDoListView.clProSettings.IsFill = True;
  ToDoListView.clProSettings.ColCount = 1;
  ToDoListView.clProSettings.ItemHeight = 150;
  ToDoListView.clProSettings.ItemSpace = 5;
  ToDoListView.clProSettings.BorderColor = clAlphaColor.clHexToColor('#20B2AA');
  ToDoListView.clProSettings.BorderWidth = 1;
  ToDoListView.clProSettings.RoundWidth = 3;
  ToDoListView.clProSettings.RoundHeight = 3;
  ToDoListView.SetclProSettings(ToDoListView.clProSettings);
  
  retrieveButton=MyForm.AddNewButton(MyForm,'retrieveButton', 'Retrieve');
  
  
  toDoIcon=MyForm.AddNewImage(topPanel,'toDoIcon');
  MyForm.SetImage(toDoIcon,' https://w7.pngwing.com/pngs/32/64/png-transparent-to-do-list-notebook-computer-icons-action-item-task-android-to-do-list-icon-miscellaneous-angle-text-thumbnail.png" rel="nofollow - https://w7.pngwing.com/pngs/32/64/png-transparent-to-do-list-notebook-computer-icons-action-item-task-android-to-do-list-icon-miscellaneous-angle-text-thumbnail.png ');
  toDoIcon.Align=alMostRight;
  toDoIcon.Width=40;
  toDoIcon.Height=40;
  toDoIcon.Margins.Top=0;
  toDoIcon.Margins.Right=30;
  
  addNewTaskButton=MyForm.AddNewProButton(bottomPanel, 'addNewTaskButton', '+');
  addNewTaskButton.Align = alMostRight;
  addNewTaskButton.Margins.Right=30;
  addNewTaskButton.Margins.Bottom=30;
  addNewTaskButton.Width=80;
  addNewTaskButton.Height=80;
  
  addNewTaskButton.clProSettings.FontSize=60;
  addNewTaskButton.clProSettings.BackgroundColor=clAlphaColor.clHexToColor('#4fa5ab');
  addNewTaskButton.clProSettings.RoundHeight=40;
  addNewTaskButton.clProSettings.RoundWidth=40;
  addNewTaskButton.clProSettings.FontColor = clAlphaColor.clHexToColor('#ffffff');
  addNewTaskButton.clProSettings.FontVertAlign=palCenter;
  
  addNewTaskButton.SetclProSettings(addNewTaskButton.clProSettings);
  
  MyForm.AddNewEvent(addNewTaskButton,tbeOnClick,'onAddButtonClick');
  MyForm.AddNewEvent(toDoIcon,tbeOnClick,'onIconClick');
  
  MyForm.AddNewEvent(retrieveButton,tbeOnClick,'retrieveCurrentDayItems');

  SqLiteConnection;
  
  MyForm.Run;
}



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