How to sort ComboBox without making a sort code.

Question

I am wondering if there is a simple call for sorting ComboBox, without advanced code with fors, x++ etc...

Answer 1

Hello,

Welcome to Microsoft Q&A!

Currently, the ComboBox control doesn't contain a built-in method to sort its items. If you need to sort the items of the ComboBox, you will need to sort the item source of the ComboBox instead. The simplest way is to sort the source list with LINQ. Use the orderby command of LINQ sentence to change the source list.

Here is a sample I made and you could take look at it.

Xaml:

  <Grid>
        <ComboBox x:Name="FontsCombo" Header="Fonts" Height="88" Width="296"  DisplayMemberPath="Id"/>
    </Grid>

Code-behind:

  public sealed partial class MainPage : Page
    {
        public List<TestModel> source { get; set; }
        public MainPage()
        {
            this.InitializeComponent();
            source = new List<TestModel>();
            this.Loaded += MainPage_Loaded;
            
        }

        private void MainPage_Loaded(object sender, RoutedEventArgs e)
        {
            for (int i = 0; i < 10; i++)
            {
                Random random = new Random();
                int RandomNumber = random.Next(0, 100);
                TestModel model = new TestModel { Id = RandomNumber};
                source.Add(model);
            }
            // sort the source list by ID
            var newSource= from item in source
                           orderby item.Id
                           select item;

            FontsCombo.ItemsSource = newSource;
        }
    }

    public class TestModel 
    {
        public int Id { get; set; }
    }

I generated 10 items with random numbers. Then I use the LINQ to get the newSource as the source of the ComboBox.

Thank you.

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Answer 2

I made a workaround to save data in right position:

int count_companies = int.Parse(data_read[0]) + 1;
                        file_save = count_companies.ToString();

                        int compare_1;
                        int compare_2;

                        for (int x = 0; x < int.Parse(data_read[0]); x++)
                        {
                            if (x > 0)
                            {
                                compare_1 = company_name_TB.Text.CompareTo(data_read[x * 4 - 3]);

                                compare_2 = company_name_TB.Text.CompareTo(data_read[(x * 4) + 1]);
                                if ((compare_1 > 0) && (compare_2 < 0))
                                {
                                    file_save = file_save + "\n" + company_name_TB.Text;
                                    file_save = file_save + "\n" + company_text_TB.Text;
                                    file_save = file_save + "\n" + company_nip_TB.Text;
                                    file_save = file_save + "\n" + company_adress_TB.Text;
                                }
                            }


                            data_read.Add(data_read[x * 4 + 1]);
                            data_read.Add(data_read[x * 4 + 2]);
                            data_read.Add(data_read[x * 4 + 3]);
                            data_read.Add(data_read[x * 4 + 4]);

                            file_save = file_save + "\n" + data_read[x * 4 + 1];
                            file_save = file_save + "\n" + data_read[x * 4 + 2];
                            file_save = file_save + "\n" + data_read[x * 4 + 3];
                            file_save = file_save + "\n" + data_read[x * 4 + 4];
                        }

                        await FileIO.WriteTextAsync(file_firms_load, file_save, Windows.Storage.Streams.UnicodeEncoding.Utf8);