C#•9mo ago

❔ update observeral collection into ui

i got a question since i got this code

        private void SortBlocks(object sender, RoutedEventArgs e)
        {
            int currentBlockCount = blocksCollection.Count;

            if (currentBlockCount > 0)
            {
                for (int i = 0; i < currentBlockCount; i++)
                {
                    var block = blocksCollection[i];
                    Console.WriteLine($"i ={i}");

                    Console.WriteLine(((SolidColorBrush)block.Background).Color.ToString());
                    for (int j = i; j < currentBlockCount - i; j++)
                    {
                        var blockinner = blocksCollection[j];

                        if (((SolidColorBrush)blockinner.Background).Color == ((SolidColorBrush)block.Background).Color)
                        {
                            for (int k = i + 2; k < j; k++)
                            {
                                var NextBlock = blocksCollection[k + 1];
                                var CurrentBlock = blocksCollection[k];
                                if (((SolidColorBrush)CurrentBlock.Background).Color != ((SolidColorBrush)NextBlock.Background).Color)
                                {
                                    blocksCollection.RemoveAt(k);
                                    blocksCollection.Insert(k - 1, CurrentBlock);
                                    Console.WriteLine($"Swapped {k} with {k - 1} ");
                                }
                            }
                        }
                    }
                }
            }
            else
            {
                MessageBox.Show("No blocks to sort.");
            }
        }

        private void SortBlocks(object sender, RoutedEventArgs e)
        {
            int currentBlockCount = blocksCollection.Count;

            if (currentBlockCount > 0)
            {
                for (int i = 0; i < currentBlockCount; i++)
                {
                    var block = blocksCollection[i];
                    Console.WriteLine($"i ={i}");

                    Console.WriteLine(((SolidColorBrush)block.Background).Color.ToString());
                    for (int j = i; j < currentBlockCount - i; j++)
                    {
                        var blockinner = blocksCollection[j];

                        if (((SolidColorBrush)blockinner.Background).Color == ((SolidColorBrush)block.Background).Color)
                        {
                            for (int k = i + 2; k < j; k++)
                            {
                                var NextBlock = blocksCollection[k + 1];
                                var CurrentBlock = blocksCollection[k];
                                if (((SolidColorBrush)CurrentBlock.Background).Color != ((SolidColorBrush)NextBlock.Background).Color)
                                {
                                    blocksCollection.RemoveAt(k);
                                    blocksCollection.Insert(k - 1, CurrentBlock);
                                    Console.WriteLine($"Swapped {k} with {k - 1} ");
                                }
                            }
                        }
                    }
                }
            }
            else
            {
                MessageBox.Show("No blocks to sort.");
            }
        }

i want that it sort the blocks into my ui but the blocks are not updating in my ui but it should update right? because i replace it with other block? so my question is how could i update a observeral collection list in my ui

13 Replies

Alix•9mo ago

could someone help me with this

Kouhai ／人◕ ‿‿ ◕人＼•9mo ago

Can you show your bindings with the ObservableCollection?

Alix•9mo ago

atm i'm not sure how to work with binding or do you mean like Get; set;

Alix•9mo ago

but i have it now like this

Alix•9mo ago

and this is my xaml

Kouhai ／人◕ ‿‿ ◕人＼•9mo ago

@alixd91 So you're not binding to the collection? Yeah I don't see any binding in the XAML

Alix•9mo ago

should i be something like this then?]

Alix•9mo ago

because i need to add the children.add

        private void GenerateBlocks(object sender, RoutedEventArgs e)
        {
            var input = NumberBox.Text;
            if (int.TryParse(input, out int numberOfBlocks))
            {

                for (int i = 0; i < numberOfBlocks; i++)
                {
                    TextBlock txblock = new TextBlock();
                    txblock.Background = items[random.Next(items.Count)];
                    txblock.Height = 40;
                    txblock.Width = 40;
                    txblock.Margin = new Thickness(top, left, right, bottom);
                    blocksCollection.Add(txblock);
                    Blockstime.Children.Add(txblock);
                }
            }
            else
            {
                MessageBox.Show("Please enter a valid number.");
            }
        }

        private void GenerateBlocks(object sender, RoutedEventArgs e)
        {
            var input = NumberBox.Text;
            if (int.TryParse(input, out int numberOfBlocks))
            {

                for (int i = 0; i < numberOfBlocks; i++)
                {
                    TextBlock txblock = new TextBlock();
                    txblock.Background = items[random.Next(items.Count)];
                    txblock.Height = 40;
                    txblock.Width = 40;
                    txblock.Margin = new Thickness(top, left, right, bottom);
                    blocksCollection.Add(txblock);
                    Blockstime.Children.Add(txblock);
                }
            }
            else
            {
                MessageBox.Show("Please enter a valid number.");
            }
        }

like this but when i do it like this it doesn't work

        <ItemsControl Grid.Row="1" ItemsSource="{Binding}">
            <ItemsControl.ItemsPanel>
                <ItemsPanelTemplate>
                    <WrapPanel x:Name="Blockstime" VerticalAlignment="Top" MinHeight="250" Width="Auto" Orientation="Horizontal" IsItemsHost="True">
                        
                    </WrapPanel>
                </ItemsPanelTemplate>
            </ItemsControl.ItemsPanel>
        </ItemsControl>

        <ItemsControl Grid.Row="1" ItemsSource="{Binding}">
            <ItemsControl.ItemsPanel>
                <ItemsPanelTemplate>
                    <WrapPanel x:Name="Blockstime" VerticalAlignment="Top" MinHeight="250" Width="Auto" Orientation="Horizontal" IsItemsHost="True">
                        
                    </WrapPanel>
                </ItemsPanelTemplate>
            </ItemsControl.ItemsPanel>
        </ItemsControl>

Kouhai ／人◕ ‿‿ ◕人＼•9mo ago

So blocksCollection is a collection of TextBlock? I think you're misunderstanding how ObservableCollection works, observable collection only works when a control is bound to it

Alix•9mo ago

so iwhat i just want is that the blocks that are in my observeral collection i want to update in my gui since i update it in my collection but not in my gui

Kouhai ／人◕ ‿‿ ◕人＼•9mo ago

You can bind ItemsControl to the collection and in the template generate the blocks The collection would be of brushes

Alix•9mo ago

there is also a way to send the updates of the observeral collection to the ui right without using binding? to just push the new updates to it

Accord•9mo ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ update observeral collection into ui