Dear All,

I am having a blank combobox when doing this,

'Code to fill Hospital Combobox (cmbHospital)

    Private Sub FillHospital()
        Dim objDBRelated As New DBRelated
        cmbHospital.DataContext = objDBRelated.GetHospital() 'Retrun EntityCollection

        AddHandler cmbHospital.SelectionChanged, AddressOf 
        cmbHospital_OnSelectionChanged
    End Sub

I am calling this function on MyBase.Loaded

'Hospital Combobox XAMAL

'XAML
            <ComboBox Grid.Column="1" Grid.Row="0"  VerticalAlignment="Bottom"
             Margin="10,0,10,0" Name="cmbHospital"
             IsSynchronizedWithCurrentItem="True" ItemsSource="{Binding}"
             ItemTemplate="{StaticResource HospitalListTemplate}"
             />

'HospitalListTemplate is defined as

         <DataTemplate x:Key="HospitalListTemplate">
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="{Binding Path=strDisplayAs}" Margin="0,0,2,0" 
                 VerticalAlignment="Center"/>
                <TextBlock VerticalAlignment="Center">
                    <Bold><Label Content="{Binding Path=intNoOfBeds}" /></Bold>
                </TextBlock>
                <Image Margin="11,0,0,0" Source="../Images/edit-48.png" 
                 VerticalAlignment="Center" Width="28" Height="28" 
                 RenderOptions.BitmapScalingMode="HighQuality"/>
            </StackPanel>
        </DataTemplate>

when i execute above i am having 19 blank items in my combo, as i've 19 hospitals in my db table, not only this even the cmbHospital_OnSelectionChanged is working fine whenever i made another selection from combobox (i am filling departments on selected hospital).

    Sub cmbHospital_OnSelectionChanged(ByVal sender As Object, ByVal e As RoutedEventArgs)
            FillDepartment(CType(CType(cmbHospital.SelectedItem, 
            HospitalEntity).Fields("HospitalId").DbValue, Integer))
    End Sub

On other hand I am using datatable as the datacontext for Department combobox and which is working fine (displaying departments).

'Code to fill Department Combobox (cmbDepartment)

    Private Sub FillDepartment(ByVal p_nHospitalId As Integer)
        Dim objSPCalling As New SPCalling
        cmbDepartment.DataContext = 
        objSPCalling.GetHospitalDepartment(p_nHospitalId) 'Return Datatable
    End Sub

'Department Combobox XAMAL

            <ComboBox Grid.Column="1" Grid.Row="1"  VerticalAlignment="Bottom"
              Margin="10,0,10,0" Name="cmbDepartment" 
              IsSynchronizedWithCurrentItem="True" 
              ItemsSource="{Binding}"
              ItemTemplate="{StaticResource DepartmentListTemplate}"
              />

'Department ListTemplate is defined as

         <DataTemplate x:Key="HospitalListTemplate">
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="{Binding Path=strDisplayAs}" Margin="0,0,2,0" 
                 VerticalAlignment="Center"/>
                <TextBlock VerticalAlignment="Center">
                    <Bold><Label Content="{Binding Path=intSort}" /></Bold>
                </TextBlock>
                <Image Margin="11,0,0,0" Source="../Images/edit-48.png" 
                 VerticalAlignment="Center" Width="28" Height="28" 
                 RenderOptions.BitmapScalingMode="HighQuality"/>
            </StackPanel>
        </DataTemplate>

Any idea why these hospital items are not getting displayed.

Note: I am using image in both Datatemplates as for my practice.

Regards,

Basically both department and hospital comboboxes are setup similar. I would check whether you have casing mismatches in field names or something like that.

Dear David,

Thanks for your consideration but the major and only difference between hospital combo and department combo is the datacontext,

in hospital

cmbHospital.DataContext = objDBRelated.GetHospital() [b]'Retrun EntityCollection[/b]

in department

objSPCalling.GetHospitalDepartment(p_nHospitalId) [b]'Return Datatable[/b]

and when i change cmbHospital.DataContext to DataTable it is working fine

Thanks & Regards, Adnan

Just for trial, remove the ItemTemplate and use DisplayMemberPath.

Also please check the Field's casing "strDisplayAs", shouldn't the first letter be in capital letter.

Just added DataContext="{Binding}" in Combobox XAML and problem solved.

Old XAML

            <ComboBox Grid.Column="1" Grid.Row="0" VerticalAlignment="Bottom"
             Margin="10,0,10,0" Name="cmbHospital"
             IsSynchronizedWithCurrentItem="True"
             ItemsSource="{Binding}"
             ItemTemplate="{StaticResource HospitalListTemplate}"
             />

Old XAML

            <ComboBox Grid.Column="1" Grid.Row="0"  VerticalAlignment="Bottom"
             Margin="10,0,10,0" Name="cmbHospital"
             IsSynchronizedWithCurrentItem="True" 
             ItemsSource="{Binding}"
             DataContext="{Binding}"
             ItemTemplate="{StaticResource HospitalListTemplate}" />

Thanks David & Thanks Walaa for your consideration on my problem.

Regards, Adnan

Modifying my last message.

Solved.

Added DataContext="{Binding}" in Combobox XAML. Plus First letter of the Field is in caps "strDisplayAs" (As Walaa said)

Old XAML

<ComboBox Grid.Column="1" Grid.Row="0" VerticalAlignment="Bottom"
             Margin="10,0,10,0" Name="cmbHospital"
             IsSynchronizedWithCurrentItem="True"
             ItemsSource="{Binding}"
             ItemTemplate="{StaticResource HospitalListTemplate}"
             />

New XAML

<ComboBox Grid.Column="1" Grid.Row="0" VerticalAlignment="Bottom"
             Margin="10,0,10,0" Name="cmbHospital"
             IsSynchronizedWithCurrentItem="True" 
             ItemsSource="{Binding}"
             DataContext="{Binding}"
             ItemTemplate="{StaticResource HospitalListTemplate}" />