WPF ComboBox DataBinding vb.net - wpf

Question

I am trying to populate a combobox using databinding.Below are the snippets of my code.
XAML:
<ComboBox Name="cmbClientName" ItemsSource="{Binding Path=blClientList}" DisplayMemberPath="Name" SelectedValuePath="Name" SelectedValue="{Binding Path=blClientList}"/>
Code behind 'MainWindow':
Private Sub MainWindow_Loaded(sender As Object, e As RoutedEventArgs) Handles Me.Loaded
Dim blClientList As ObservableCollection(Of String) = New ObservableCollection(Of String)
Dim objClientRepository As PET_ClientRepository = New PET_ClientRepository
For Each objClient As PET_Client In objClientRepository.GetAll()
blClientList.Add(objClient.Name)
Next
Me.cmbClientName.ItemsSource = blClientList
End Sub
Class1.vb:
Public Property Name As String
Get
Return _Name
End Get
Set(value As String)
_Name = value
End Set
End Property
I would like to see the name of the client in my combobox. The code above does not return anything and combobox is blank.I know the problem lies in binding but can not figure out what I am doing wrong.

Answer 1

Here's an example that may help you achieve your desired result:
Re: your comment, binding is good, you just need to set context
WPF
<Window x:Class="MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApplication4VB"
Title="MainWindow" Height="100" Width="293">
<Window.DataContext>
<local:Vm />
</Window.DataContext>
<Grid>
<ComboBox ItemsSource="{Binding Collection}" DisplayMemberPath="Name" />
</Grid>
</Window>
important things being that you add your local namespace:
xmlns:local="clr-namespace:WpfApplication4VB"
and that you set DataContext
Classes
Public Class Vm
Public Property Collection As System.Collections.ObjectModel.ObservableCollection(Of Thing)
Public Sub New()
Collection = New ObjectModel.ObservableCollection(Of Thing)()
Collection.Add(New Thing("Test1"))
Collection.Add(New Thing("Test2"))
Collection.Add(New Thing("Test3"))
End Sub
End Class
Public Class Thing
Public Property Name As String
Public Sub New(Name As String)
Me.Name = Name
End Sub
End Class

Answer 2

Thank you everyone for your help.
I went ahead with populating the combobox in the code behind in stead of binding it to a datasource. I didn't even have to pass "ItemSource" in XAML. I did however pass ItemSource in Mainwindow.vb which did the trick for me.
Below are the snippets of code that are working:
Code behind MainWindow.vb
Private Sub MainWindow_Loaded(sender As Object, e As RoutedEventArgs) Handles Me.Loaded
Me.Username.Text = System.Security.Principal.WindowsIdentity.GetCurrent().Name
Dim blClientList As ObservableCollection(Of String) = New ObservableCollection(Of String)
Dim objClientRepository As PET_ClientRepository = New PET_ClientRepository
For Each objClient As PET_Client In objClientRepository.GetAll()
blClientList.Add(objClient.Name)
Next
Me.cmbClientName.ItemsSource = blClientList
XAML:
<ComboBox Name="cmbClientName" IsReadOnly="True" PresentationTraceSources.TraceLevel="High"/>
Tracelevel isn't doing anything but is just there to provide debug tracing support.
Class1.vb
Public Property Name As String
Get
Return _Name
End Get
Set(value As String)
_Name = value
End Set
End Property

Answer 3

Replace this:
Me.cmbClientName.ItemsSource = blClientList
with this:
Me.DataContext = blClientList
and correct XAML as:
<ComboBox Name="cmbClientName" ItemsSource="{Binding}"
DisplayMemberPath="." SelectedValuePath="."/>