Usercontrol यूआई परिवर्तन नहीं करता

UserControl

  <UserControl x:Class="NolowaFrontend.Views.MainViews.SearchView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:NolowaFrontend.Views.MainViews"
             xmlns:diag="clr-namespace:System.Diagnostics;assembly=WindowsBase"
             xmlns:designTime="clr-namespace:NolowaFrontend.Views"
             mc:Ignorable="d" Name="_this"
             d:DesignHeight="300" d:DesignWidth="350" d:Background="White">   
    <Grid>
        <TextBlock Text="{Binding SearchedUsers.Count, diag:PresentationTraceSources.TraceLevel=High}" Foreground="Red" FontSize="20"/>
    </Grid>
</UserControl>

CodeBehind

public partial class SearchView : UserControl
{
    private readonly SearchVM _searchVM;

    public SearchView(User user)
    {
        InitializeComponent();

        _searchVM = new SearchVM(user); ;

        DataContext = _searchVM;
    }

    public void TimerSearch(string text)
    {
        _searchVM.TimerSearch(text);
    }
}

ViewModel

public class SearchVM : ViewModelBase
{
    private readonly User _user;
    private readonly ISearchService _searchService;

    private ObservableCollection<SearchedUser> _searchedUsers = new ObservableCollection<SearchedUser>();

    public ObservableCollection<SearchedUser> SearchedUsers
    {
        get { return _searchedUsers; }
        set { _searchedUsers = value; OnPropertyChanged(); }
    }

    public SearchVM(User user)
    {
        _user = user;
        _searchService = new SearchService();
    }

    public async void TimerSearch(string text)
    {
        var response = await _searchService.SearchUser(text);

        var data = response.ResponseData;

        SearchedUsers = data.ToObservableCollection(); 
    }
}

bindig लॉग इन करें

System.Windows.Data Warning: 67 : BindingExpression (hash=11842506): Resolving source 
System.Windows.Data Warning: 70 : BindingExpression (hash=11842506): Found data context element: TextBlock (hash=56511253) (OK)
System.Windows.Data Warning: 78 : BindingExpression (hash=11842506): Activate with root item SearchVM (hash=52539597)
System.Windows.Data Warning: 108 : BindingExpression (hash=11842506):   At level 0 - for SearchVM.SearchedUsers found accessor RuntimePropertyInfo(SearchedUsers)
System.Windows.Data Warning: 104 : BindingExpression (hash=11842506): Replace item at level 0 with SearchVM (hash=52539597), using accessor RuntimePropertyInfo(SearchedUsers)
System.Windows.Data Warning: 101 : BindingExpression (hash=11842506): GetValue at level 0 from SearchVM (hash=52539597) using RuntimePropertyInfo(SearchedUsers): ObservableCollection`1 (hash=49313939 Count=0)
System.Windows.Data Warning: 108 : BindingExpression (hash=11842506):   At level 1 - for ObservableCollection`1.Count found accessor RuntimePropertyInfo(Count)
System.Windows.Data Warning: 104 : BindingExpression (hash=11842506): Replace item at level 1 with ObservableCollection`1 (hash=49313939 Count=0), using accessor RuntimePropertyInfo(Count)
System.Windows.Data Warning: 101 : BindingExpression (hash=11842506): GetValue at level 1 from ObservableCollection`1 (hash=49313939 Count=0) using RuntimePropertyInfo(Count): '0'
System.Windows.Data Warning: 80 : BindingExpression (hash=11842506): TransferValue - got raw value '0'
System.Windows.Data Warning: 84 : BindingExpression (hash=11842506): TransferValue - implicit converter produced '0'
System.Windows.Data Warning: 89 : BindingExpression (hash=11842506): TransferValue - using final value '0'
System.Windows.Data Warning: 56 : Created BindingExpression (hash=29516363) for Binding (hash=55475379) BindingExpression:Path=SearchedUsers.Count; DataItem=null; 
System.Windows.Data Warning: 58 :  Path: 'SearchedUsers.Count'
System.Windows.Data Warning: 60 : BindingExpression (hash=29516363): Default mode resolved to OneWay
System.Windows.Data Warning: 61 : BindingExpression (hash=29516363): Default update trigger resolved to PropertyChanged
System.Windows.Data Warning: 62 : BindingExpression (hash=29516363): Attach to System.Windows.Controls.TextBlock.Text (hash=35990092)
System.Windows.Data Warning: 67 : BindingExpression (hash=29516363): Resolving source 
System.Windows.Data Warning: 70 : BindingExpression (hash=29516363): Found data context element: TextBlock (hash=35990092) (OK)
System.Windows.Data Warning: 71 : BindingExpression (hash=29516363): DataContext is null
System.Windows.Data Warning: 65 : BindingExpression (hash=29516363): Resolve source deferred
System.Windows.Data Warning: 67 : BindingExpression (hash=29516363): Resolving source 
System.Windows.Data Warning: 70 : BindingExpression (hash=29516363): Found data context element: TextBlock (hash=35990092) (OK)
System.Windows.Data Warning: 78 : BindingExpression (hash=29516363): Activate with root item SearchVM (hash=64320678)
System.Windows.Data Warning: 107 : BindingExpression (hash=29516363):   At level 0 using cached accessor for SearchVM.SearchedUsers: RuntimePropertyInfo(SearchedUsers)
System.Windows.Data Warning: 104 : BindingExpression (hash=29516363): Replace item at level 0 with SearchVM (hash=64320678), using accessor RuntimePropertyInfo(SearchedUsers)
System.Windows.Data Warning: 101 : BindingExpression (hash=29516363): GetValue at level 0 from SearchVM (hash=64320678) using RuntimePropertyInfo(SearchedUsers): ObservableCollection`1 (hash=42592467 Count=0)
System.Windows.Data Warning: 107 : BindingExpression (hash=29516363):   At level 1 using cached accessor for ObservableCollection`1.Count: RuntimePropertyInfo(Count)
System.Windows.Data Warning: 104 : BindingExpression (hash=29516363): Replace item at level 1 with ObservableCollection`1 (hash=42592467 Count=0), using accessor RuntimePropertyInfo(Count)
System.Windows.Data Warning: 101 : BindingExpression (hash=29516363): GetValue at level 1 from ObservableCollection`1 (hash=42592467 Count=0) using RuntimePropertyInfo(Count): '0'
System.Windows.Data Warning: 80 : BindingExpression (hash=29516363): TransferValue - got raw value '0'
System.Windows.Data Warning: 84 : BindingExpression (hash=29516363): TransferValue - implicit converter produced '0'
System.Windows.Data Warning: 89 : BindingExpression (hash=29516363): TransferValue - using final value '0'
System.Windows.Data Warning: 95 : BindingExpression (hash=11842506): Got PropertyChanged event from SearchVM (hash=52539597)
System.Windows.Data Warning: 101 : BindingExpression (hash=11842506): GetValue at level 0 from SearchVM (hash=52539597) using RuntimePropertyInfo(SearchedUsers): ObservableCollection`1 (hash=53428882 Count=2)
System.Windows.Data Warning: 105 : BindingExpression (hash=11842506):   Item at level 1 has same type - reuse accessor RuntimePropertyInfo(Count)
System.Windows.Data Warning: 104 : BindingExpression (hash=11842506): Replace item at level 1 with ObservableCollection`1 (hash=53428882 Count=2), using accessor RuntimePropertyInfo(Count)
System.Windows.Data Warning: 101 : BindingExpression (hash=11842506): GetValue at level 1 from ObservableCollection`1 (hash=53428882 Count=2) using RuntimePropertyInfo(Count): '2'
System.Windows.Data Warning: 80 : BindingExpression (hash=11842506): TransferValue - got raw value '2'
System.Windows.Data Warning: 84 : BindingExpression (hash=11842506): TransferValue - implicit converter produced '2'
System.Windows.Data Warning: 89 : BindingExpression (hash=11842506): TransferValue - using final value '2'

हाय! जब अगर वहाँ एक समारोह है कि कॉल SearchView.TimerSearch("एक्स")

मुझे लगता है कि UserControl गिनती से पता चलता है कि से लौटे SearchView.TimerSearch("एक्स")

लेकिन यह काम नहीं कि मैं कैसे उम्मीद करते हैं.

बाध्यकारी लॉग इन करें कहते हैं, यह बदल गया है करने के लिए 2. लेकिन यह '0' है और कभी नहीं बदला!

कोई मेरी मदद कर सकता?