Why the databinding fails in ListView (WPF) ?
- by Ashish Ashu
I have a ListView of which ItemSource is set to my Custom Collection.
I have defined a GridView CellTemplate that contains a combo box as below :
<ListView
MaxWidth="850"
Grid.Row="1"
SelectedItem="{Binding Path = SelectedCondition}"
ItemsSource="{Binding Path = Conditions}"
FontWeight="Normal"
FontSize="11"
Name="listview">
<ListView.View>
<GridView>
<GridViewColumn
Width="175"
Header="Type">
<GridViewColumn.CellTemplate>
<DataTemplate>
<ComboBox
Style="{x:Null}"
x:Name="TypeCmbox"
Height="Auto"
Width="150"
SelectedValuePath="Key"
DisplayMemberPath="Value"
SelectedItem="{Binding Path = MyType}"
ItemsSource="{Binding Path = MyTypes}"
HorizontalAlignment="Center" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</ListView>
My Custom collection is the ObservableCollection.
I have a two buttons - Move Up and Move Down on top of the listview control . When user clicks on the Move Up or Move Down button I call MoveUp and MoveDown methods of Observable Collection.
But when I Move Up and Move Down the rows then the Selected Index of a combo box is -1.
I have ensured that selectedItem is not equal to null when performing Move Up and Move Down commands.
Please Help!!
