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SuthiYuvarajSuthiYuvaraj
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MAUI-3289 To add an item in a specific index with groups
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‎ListViewMaui/ListViewMaui.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 17
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VisualStudioVersion = 17.0.31611.283
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ListViewMaui", "ListViewMaui\ListViewMaui.csproj", "{02F7D986-E626-42A6-A9A1-B36C96C4290B}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{02F7D986-E626-42A6-A9A1-B36C96C4290B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{02F7D986-E626-42A6-A9A1-B36C96C4290B}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{02F7D986-E626-42A6-A9A1-B36C96C4290B}.Debug|Any CPU.Deploy.0 = Debug|Any CPU
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{02F7D986-E626-42A6-A9A1-B36C96C4290B}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{02F7D986-E626-42A6-A9A1-B36C96C4290B}.Release|Any CPU.Build.0 = Release|Any CPU
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{02F7D986-E626-42A6-A9A1-B36C96C4290B}.Release|Any CPU.Deploy.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {61F7FB11-1E47-470C-91E2-47F8143E1572}
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EndGlobalSection
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EndGlobal

‎ListViewMaui/ListViewMaui/App.xaml‎

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<?xml version = "1.0" encoding = "UTF-8" ?>
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<Application xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
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xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
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xmlns:local="clr-namespace:ListViewMaui"
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x:Class="ListViewMaui.App">
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<Application.Resources>
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<ResourceDictionary>
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<ResourceDictionary.MergedDictionaries>
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<ResourceDictionary Source="Resources/Styles/Colors.xaml" />
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<ResourceDictionary Source="Resources/Styles/Styles.xaml" />
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</ResourceDictionary.MergedDictionaries>
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</ResourceDictionary>
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</Application.Resources>
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</Application>

‎ListViewMaui/ListViewMaui/App.xaml.cs‎

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namespace ListViewMaui;
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public partial class App : Application
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{
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public App()
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{
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InitializeComponent();
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MainPage = new MainPage();
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}
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}

‎ListViewMaui/ListViewMaui/AppShell.xaml‎

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<?xml version="1.0" encoding="UTF-8" ?>
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<Shell
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x:Class="ListViewMaui.AppShell"
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xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
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xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
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xmlns:local="clr-namespace:ListViewMaui"
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Shell.FlyoutBehavior="Disabled">
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<ShellContent
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Title="Home"
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ContentTemplate="{DataTemplate local:MainPage}"
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Route="MainPage" />
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</Shell>

‎ListViewMaui/ListViewMaui/AppShell.xaml.cs‎

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namespace ListViewMaui;
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public partial class AppShell : Shell
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{
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public AppShell()
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{
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InitializeComponent();
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}
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}

‎ListViewMaui/ListViewMaui/Helper/Behavior.cs‎

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using Microsoft.Maui.Controls;
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using Syncfusion.Maui.DataSource;
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using Syncfusion.Maui.DataSource.Extensions;
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using Syncfusion.Maui.ListView;
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using Syncfusion.Maui.ListView.Helpers;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection;
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using System.Text;
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using System.Threading.Tasks;
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namespace ListViewMaui
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{
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public class Behavior:Behavior<ContentPage>
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{
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#region Fields
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private Syncfusion.Maui.ListView.SfListView listView;
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private Button Addbutton;
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private ContactsViewModel viewModel;
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GroupResult itemGroup;
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#endregion
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#region Overrides
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protected override void OnAttachedTo(ContentPage bindable)
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{
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listView = bindable.FindByName<Syncfusion.Maui.ListView.SfListView>("listView");
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viewModel = new ContactsViewModel();
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listView.BindingContext = viewModel;
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listView.ItemsSource = viewModel.ContactItems;
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listView.DataSource.GroupDescriptors.Add(new GroupDescriptor()
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{
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PropertyName = "ContactName",
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KeySelector = (object obj1) =>
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{
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var item = (obj1 as Contact);
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return item.ContactName[0].ToString();
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}
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});
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Addbutton = bindable.FindByName<Button>("addItem");
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Addbutton.Clicked += Addbutton_Clicked;
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base.OnAttachedTo(bindable);
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}
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#region CallBacks
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private void Addbutton_Clicked(object sender, EventArgs e)
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{
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var contact = new Contact();
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contact.ContactName = "Adam";
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contact.ContactNumber = "783-457-567";
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contact.ContactImage = "image" + 25 + ".png";
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viewModel.ContactItems.Add(contact);
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GetGroupResult(contact);
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if (itemGroup == null)
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return;
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var items = itemGroup.GetType().GetRuntimeProperties().FirstOrDefault(x => x.Name == "ItemList").GetValue(itemGroup) as List<object>;
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InsertItemInGroup(items, contact, 0);
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}
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#endregion
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#region Methods
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internal void GetGroupResult(object ItemData)
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{
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var descriptor = listView.DataSource.GroupDescriptors[0];
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object key;
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if (descriptor.KeySelector == null)
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{
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var propertyInfoCollection = new PropertyInfoCollection(ItemData.GetType());
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key = propertyInfoCollection.GetValue(ItemData, descriptor.PropertyName);
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}
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else
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key = descriptor.KeySelector(ItemData);
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for (int i = 0; i < this.listView.DataSource.Groups.Count; i++)
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{
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var group = this.listView.DataSource.Groups[i];
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if ((group.Key != null && group.Key.Equals(key)) || group.Key == key)
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{
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itemGroup = group;
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break;
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}
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group = null;
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}
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descriptor = null;
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key = null;
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}
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internal void InsertItemInGroup(List<object> items, object Item, int InsertAt)
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{
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items.Remove(Item);
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items.Insert(InsertAt, Item);
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}
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#endregion
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protected override void OnDetachingFrom(ContentPage bindable)
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{
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listView = null;
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Addbutton.Clicked -= Addbutton_Clicked;
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Addbutton = null;
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viewModel = null;
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base.OnDetachingFrom(bindable);
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}
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#endregion
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}
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}

‎ListViewMaui/ListViewMaui/Images/image0.png‎

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‎ListViewMaui/ListViewMaui/Images/image1.png‎

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‎ListViewMaui/ListViewMaui/Images/image10.png‎

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‎ListViewMaui/ListViewMaui/Images/image11.png‎

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