WPF Select All Checkbox in a DataGrid DataBinding (Using Xampp, SQLYog, ODBC Driver)

Question

Hi! Everyone

I have been searching and integrating all checkbox multiselect from the answers I found online, and I l learnt so much, whether they use MVVM Light tollkit and Non-MVVM approach. All of them runs in different way but all are fulfilled the select all requirement that I needed.

The issue I am encountering raises when I use to integrate my DataGrid Loader (LoadDGV) after doing it in Hardcore data

Here are my snippets for select all that runs correctly

using GalaSoft.MvvmLight.Command;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;


namespace chkSelectAll
{
    public class MainWindowViewModel : INotifyPropertyChanged
    {
        private List _items;

        public List Items
        {
            get { return _items; }
            set
            {
                _items = value;
                OnPropertyChanged();
            }
        }

        private bool? isAllSelected;

        public bool? IsAllSelected
        {
            get { return isAllSelected; }
            set
            {
                //Console.WriteLine($"Item IsChecked set to: {value}");
                isAllSelected = value;
                OnPropertyChanged();
            }
        }

        public RelayCommand chkSelectAll { get; private set; }
        public RelayCommand chkSelectCell { get; private set; }

        public MainWindowViewModel() 
        {
            chkSelectAll = new RelayCommand(() => chkSelectAllCommand());
            chkSelectCell = new RelayCommand(() => chkSelectCellCommand());

            Items = GetItems();

            IsAllSelected = false;
        }

        private void chkSelectAllCommand()
        {
            if (IsAllSelected == true)
                Items.ForEach(x => x.IsChecked = true);
            else
                Items.ForEach(x => x.IsChecked = false);
        }

        private void chkSelectCellCommand()
        {
            bool anyUnchecked = Items.Any(x => x.IsChecked == false);

            if (Items.All(x => x.IsChecked))
                IsAllSelected = true;
            else if (Items.All(x => !x.IsChecked))
                IsAllSelected = false;
            else if (Items.Any(x => x.IsChecked == anyUnchecked))
                IsAllSelected = null;
        }

        private List GetItems()
        {
            return new List
            {
                new Item { ItemID = 1, ItemName = "Lettuce", ItemCode = "1001", ItemGroup = "Group 1", LastPurchaseDate = "2024-04-21", OnHand = "15.00" },
                new Item { ItemID = 6, ItemName = "Chicken", ItemCode = "1006", ItemGroup = "Group 2", LastPurchaseDate = "2024-04-23", OnHand = "40.00" },
                new Item { ItemID = 9, ItemName = "Shrimp", ItemCode = "1009", ItemGroup = "Group 3", LastPurchaseDate = "2024-04-23", OnHand = "55.00" }
            };
        }

        public event PropertyChangedEventHandler PropertyChanged;

        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }

    public class Item : INotifyPropertyChanged
    {
        private bool _isChecked;
        public bool IsChecked
        {
            get { return _isChecked; }
            set
            {
                _isChecked = value;
                OnPropertyChanged();
            }
        }

        public int ItemID { get; set; }
        public string ItemName { get; set; }
        public string ItemCode { get; set; }
        public string ItemGroup { get; set; }
        public string LastPurchaseDate { get; set; }
        public string OnHand { get; set; }


        public event PropertyChangedEventHandler PropertyChanged;

        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}

Here's MainWindow.xaml:

Here using HardCore Data: SelectAll HardCore Data

Here's my integration of LoadDGV inside the MainWindow:

    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            LoadDGV(null, null);
        }
        #region LoadDGV
        public void LoadDGV(object sender, RoutedEventArgs e)
        {
            //OdbcConnection conn = null;
            OdbcCommand cmd;
            string sql = @"SELECT 
                items.ItemID,
                items.ItemName, 
                CONCAT(itemprefixes.Prefix, items.ItemCodeNumber) AS ItemCode, 
                itemgroups.GroupName AS ItemGroup,
                DATE_FORMAT(items.LastPurchaseDate, '%d %M %Y') AS LastPurchaseDate,
                CONCAT(units.UnitName, ' ', TRIM(TRAILING '.' FROM TRIM(TRAILING '0' FROM ROUND(items.OnHand, 1)))) AS OnHand
            FROM 
                items 
            INNER JOIN 
                itemgroups ON items.ItemGroupID = itemgroups.GroupID 
            INNER JOIN 
                units ON items.UnitID = units.UnitID 
            INNER JOIN 
                itemprefixes ON items.PrefixID = itemprefixes.PrefixID
            WHERE 
                items.IsActive = 1";

            OdbcDataAdapter da = new OdbcDataAdapter();
            //DataTable dt = new DataTable();
            DataSet ds = new DataSet();
            DataTable dt = new DataTable();
            try
            {
                ModConn.dbConnect();
                cmd = new OdbcCommand(sql, ModConn.conn);
                da.SelectCommand = cmd;
                da.Fill(ds, "Items");
                dt = ds.Tables["Items"];
                ds.Tables["Items"].DefaultView.Sort = "ItemID";
                ds.Tables["Items"].DefaultView.Table.Columns["ItemID"].ColumnMapping = MappingType.Hidden;
                #region Items
                List items = new List();
                foreach (DataRow row in dt.Rows)
                {
                    Item item = new Item
                    {
                        ItemID = Convert.ToInt32(row["ItemID"]),
                        ItemName = row["ItemName"].ToString(),
                        ItemCode = row["ItemCode"].ToString(),
                        ItemGroup = row["ItemGroup"].ToString(),
                        LastPurchaseDate = row["LastPurchaseDate"].ToString(),
                        OnHand = row["OnHand"].ToString()
                    };
                    items.Add(item);
                }
                #endregion
                DGV.ItemsSource = ds.Tables["Items"].DefaultView;
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error: " + ex.Message, "DB Connection Error", MessageBoxButton.OK, MessageBoxImage.Error);
            }
            finally
            {
                if (ModConn.conn != null && ModConn.conn.State == ConnectionState.Open)
                {
                    ModConn.conn.Close(); // Close the connection in the finally block
                    ModConn.conn.Dispose();
                    //GC.Collect;
                }
            }
        }
        #endregion
    }

ModConn Class:

using System.Data;
using System.Configuration;
namespace CRUD_InventoryManagement
{
    public static class ModConn
    {
        public static OdbcConnection conn;
        public static void dbConnect()
        {
            try
            {
                string connectionString = ConfigurationManager.ConnectionStrings["MyDSN"].ConnectionString;
                conn = new OdbcConnection(connectionString);
                if (conn.State == ConnectionState.Closed)
                {
                    conn.Open();
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("Error: " + ex.Message);
            }
        }
    }
}

Here using Data Binding: SelectAll DataBinding

Like what I said, the problem rises when I integrate my LoadDGV to populate from the database

NOTE: I am using SQL Yog IDE and ODBC Data Source Name for database manipulation and connection

Accepted Answer

Hi,@Superbia15. Could you change the LoadDGV method like above and add it to the MainWindowViewModel and then call it to populate the List and bind to the DataGrid? Your integration code directly sets the List to the ItemsSource instead of binding.


private List GetItems()

{

    List l = LoadDGV();

    return l;

}
        public List LoadDGV()

        {
          ...
                    List items = new List();

                    foreach (DataRow row in dt.Rows)

                    {

                        Item item = new Item

                        {

                            ItemID = Convert.ToInt32(row["ItemID"]),

                            ItemName = row["ItemName"].ToString(),

                            ItemCode = row["ItemCode"].ToString(),

                            ItemGroup = row["ItemGroup"].ToString(),

                            LastPurchaseDate = row["LastPurchaseDate"].ToString(),

                            OnHand = row["OnHand"].ToString()
                        };

                        items.Add(item);

                    }
                    return items;
                }

                catch (Exception ex)
                {
                    Console.WriteLine("Error: " + ex.Message);

                    return null;
                 }

}

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WPF Select All Checkbox in a DataGrid DataBinding (Using Xampp, SQLYog, ODBC Driver)

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