C#•9mo ago

❔ replace oldblockscollection with new blockscollection

hey since my sorting is finished i want to make it work in my ui

        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 + 1; j < currentBlockCount; j++)
                    {
                        var blockinner = blocksCollection[j];
                        if (((SolidColorBrush)blockinner.Background).Color == ((SolidColorBrush)block.Background).Color)
                        {
                            if (blockinner == blocksCollection[i + 1])
                            {
                                break;
                            }
                            else
                            {
                                List<TextBlock> blocks = new List<TextBlock>();
                                for (int k = i + 1; k < j; k++)
                                {
                                    blocks.Add(blocksCollection[k]);
                                }
                                blocksCollection[i + 1] = blocksCollection[i];
                                int m = 0;
                                for (int l = i + 2; l < j + 1; l++)
                                {
                                    blocksCollection[l] = blocksCollection[m];
                                    m++;
                                }
                            }
                        }
                    }
                }
            }
            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 + 1; j < currentBlockCount; j++)
                    {
                        var blockinner = blocksCollection[j];
                        if (((SolidColorBrush)blockinner.Background).Color == ((SolidColorBrush)block.Background).Color)
                        {
                            if (blockinner == blocksCollection[i + 1])
                            {
                                break;
                            }
                            else
                            {
                                List<TextBlock> blocks = new List<TextBlock>();
                                for (int k = i + 1; k < j; k++)
                                {
                                    blocks.Add(blocksCollection[k]);
                                }
                                blocksCollection[i + 1] = blocksCollection[i];
                                int m = 0;
                                for (int l = i + 2; l < j + 1; l++)
                                {
                                    blocksCollection[l] = blocksCollection[m];
                                    m++;
                                }
                            }
                        }
                    }
                }
            }
            else
            {
                MessageBox.Show("No blocks to sort.");
            }
        }

12 Replies

Alix•9mo ago

but how could i make that i could replace my old blocks with my new blockscollection without clearing my ui field with blockstime.children.x

JakenVeina•9mo ago

my ui field

define this

Alix•9mo ago

i defined it

JakenVeina•9mo ago

okay.... but you hadn't posted it here so, how does the above code translate to anything in that wrap panel?

Alix•9mo ago

Nothing I firstly fixed that everything what sorted correctly in the observeral collection And after that i wanted to fix that it shows in ui but i’m not sure how to make that i replace the old observeral collection with the new one without clearing the wrappanel and just replacing it with correct positions

JakenVeina•9mo ago

what observable collection?

Alix•9mo ago

        private ObservableCollection<TextBlock> blocksCollection { get; set; } = new ObservableCollection<TextBlock>();

        private ObservableCollection<TextBlock> blocksCollection { get; set; } = new ObservableCollection<TextBlock>();

i just need to know how to render the updated observable collection

JakenVeina•9mo ago

nooooooooot that way A)

public ObservableCollection<string> Blocks { get; }

public ObservableCollection<string> Blocks { get; }

<ItemsControl ItemsSource="{Binding Blocks}">
    <ItemsControl.ItemsPanel>
        <ItemsPanelTemplate>
            <WrapPanel />
        </ItemsPanelTemplate>
    </ItemsControl.ItemsPanel>
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding}" />
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

<ItemsControl ItemsSource="{Binding Blocks}">
    <ItemsControl.ItemsPanel>
        <ItemsPanelTemplate>
            <WrapPanel />
        </ItemsPanelTemplate>
    </ItemsControl.ItemsPanel>
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding}" />
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

C) that's it the entire POINT of an ObservableCollection is that it's... observable you don't need to trigger render updates when you change it the collection does that itself and the UI layer listens to that that's what the Binding system accomplishes you add an item to the collection, it appears on the screen you remove an item from the collection, it vanishes from the screen you sort the collection, the UI updates to match

Alix•9mo ago

is it a big problem if i make the string to a textblock since i need to use that to get background etc?

JakenVeina•9mo ago

philosophically, yes, it's a code smell that you're mixing rendering concerns with logical concerns mechanically, you're probably gonna have trouble actually getting those TextBlocks to DISPLAY, since the binding system isn't really built for that you're effectively trying to bypass the ItemTemplate step, and I don't know if there's a mechanism to do that leaving the ItemTemplate unspecified MIGHT work?

Alix•9mo ago

alright it works Thank you yeah i see he is now complaining about this

System.Windows.Data Error: 26 : ItemTemplate and ItemTemplateSelector are ignored for items already of the ItemsControl's container type; Type='TextBlock'

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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❔ replace oldblockscollection with new blockscollection