Here is a snippet of XAML:
<ComboBox ItemsSource="{Binding UnileverDataSet.Tables, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}" Margin="5" x:Name="TableNameComboBox">
<ComboBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding TableName}"></TextBlock>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
<DataGrid Margin="5" AutoGenerateColumns="True" ItemsSource="{Binding UnileverDataSet.Tables[TableNameComboBox.SelectedIndex]}"
UnileverDataSet is a DataSet made up of about 12 DataTables
The idea here is that when the ComboBox value changes, the DataGrid should update based on the index value from the ComboBox.
Is this possible or should I look at another way of doing this?
If I do: UnileverDataSet.Tables[0], then all works and data displays correctly.
You can do element binding with combobox..
Your combox will display list of items in the "UnileverDataSet.Tables" collection. When ever your select a item in Combo box the selected item will bounded to the Datagrid Items source (since we are using element binding)
Here is the sample code
<DataGrid Margin="5" AutoGenerateColumns="True" ItemsSource="{Binding SelectedItem,ElementName=TableNameComboBox}">
Related
I have bound an ObservableCollection<Company> to a combobox.
<ComboBox
IsEditable="True"
Text="{Binding Path=Company.CompanyName, UpdateSourceTrigger=PropertyChanged}"
ItemsSource="{Binding Path=CompanyCollection,RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type local:ucEventDialog}}}"
SelectedItem="{Binding Path=Company}"
HorizontalAlignment="Stretch"/>
During runtime WPF adds at the end of the bound list an additional ComboboxItem {NewItemPlaceHolder} to the dropdown list.
I would like to use this item to trigger an additional dialog box to add a new item to the collection.
I tried to create a template for this additional item using <ComboBox.Resources> ...
<ComboBox.Resources>
<DataTemplate x:Key="PlaceholderTemplate">
<TextBlock Text="New..."/>
</DataTemplate>
</ComboBox.Resources>
However I have not found any means to ...
Change the appearance of the {NewItemPlaceHolder}.
Trigger an event when the {NewItemPlaceHolder} is selected.
I've got a datagrid in WPF that shows a grid of some data. The data is retrieved form a ViewModel, which contains the following properties:
Public ReadOnly Property Devices() As List(Of Device)
Get
Return FDevices
End Get
.
Public ReadOnly Property ClientNetworks() As List(Of network)
Get
Return fnetwork
End Get
End Property
Both properties are filled with data after constructing the view model.
To use the properties in the Datagrid i use the following XAML.
<DataGrid ItemsSource="{Binding Devices}" AutoGenerateColumns="False" >
<DataGrid.Columns>
<DataGridTemplateColumn Header="Customer" >
<DataGridTemplateColumn.CellTemplate >
<DataTemplate>
------------------ <TextBlock Text="{Binding ClientNetwork.Description}"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
<DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
------------------> <ComboBox ItemsSource="{Binding ClientNetwork}" DisplayMemberPath="Description"/>
</DataTemplate>
</DataGridTemplateColumn.CellEditingTemplate>
</DataGridTemplateColumn>
</DataGrid>
This should show a textbox with the description and a combobox with strings when edited.
Outside of the Datagrid the combobox works fine. I know this is because of the set ItemsSource on the Datagrid but i can't seem to find how to make it work. i've tried several alterations of the combobox code but none have worked so far.
The goal is to make the user be able to edit the cell and have a combobox presented, from which he can select an string, then the corresponding int will be saved in the database.
UPDATE 1
<ComboBox ItemsSource="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}},Path=DataContext.ClientNetworks}"
DisplayMemberPath="Description"
SelectedItem="{Binding ClientNetwork}"
/>
This is how i fixed the resting of the datacontext
I found a way to get it done but i am not sure this is the way it should be done
<Window.Resources>
<CollectionViewSource Source="{Binding ClientNetworks}" x:Key="clientnetworks" />
</Window.Resources>
and in the combobox
<ComboBox ItemsSource="{Binding Source={StaticResource clientnetworks}}" DisplayMemberPath="Description" />
I have a Datagrid and DataGridTemplateColumn which is ComboBox
<DataTemplate x:Key="ComboBoxPackagingType">
<ComboBox SelectedItem="{Binding PackagingType.SelectedItem, Mode=TwoWay}" ItemsSource="{Binding PackagingType.ItemsSource}"/>
</DataTemplate>
...
<DataGridTemplateColumn CellTemplate="{StaticResource ComboBoxPackagingType}"/>
The SelectedItem is never changing the value after selecting an Item from list.
I set the breakpoints on both get and set functions and it is stopping on get function after changing the ItemSource of my DataGrid but never on the set function after selecting an Item from list.
Why?
Try adding UpdateSourceTrigger=PropertyChanged to the binding of your ComboBox's selected item like so:
<DataTemplate x:Key="ComboBoxPackagingType">
<ComboBox SelectedItem="{Binding PackagingType.SelectedItem, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" ItemsSource="{Binding PackagingType.ItemsSource}"/>
</DataTemplate>
This worked for me.
I have a WPF form that contains a DataGrid. This DataGrid is editable. One column of the DataGrid contains a ComboBox with a list of lookup codes for the user to select from.
While editing, the user can add a new lookup code by calling a modal window. When control is returned to the DataGrid, the combobox does not have the new lookupcode.
How can I refresh the list in the combobox after an item is added?
Here is how my combobox is defined. Below is the column of the DataGrid and then my dictionary snippet.
<DataGridTemplateColumn Header="Type" Width="160">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding AddrType.Description}"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
<DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<ComboBox Name="cboAddrtype"
ItemsSource="{Binding Source={StaticResource addrTypeList}}"
SelectedValuePath="ID"
DisplayMemberPath="Description"
SelectedValue="{Binding AddrTypeID, UpdateSourceTrigger=PropertyChanged}"
Width="100" />
<Button ToolTip="New" Name="btnNewAddressType" Click="btnNewAddressType_Click">
<Image Source="Images\Add.png" Style="{StaticResource buttonImageStyle}" />
</Button>
</StackPanel>
</DataTemplate>
</DataGridTemplateColumn.CellEditingTemplate>
The method GetAddressTypes() returns an ObservableCollection.
<ObjectDataProvider x:Key="addrTypeList" IsAsynchronous="True"
MethodName="GetAddressTypes"
ObjectType="{x:Type components:AddressComponent}"/>
I would add the new address to the addrtypeList when the modal window is closed, or the object saved depending on your desired behavior. Because its an observableCollection it should update the combo box automatically.
I have a problem with a edit templete of cell in a WPF datagrid (WPF Toolkit). The template is builded with a ComboBox and the ItemsSource of
ComboBox are loaded at runtime.
This is the mean code...
<ObjectDataProvider x:Key="dataValuesProvider" MethodName="GetValues" />
<toolkit:DataGrid
ItemsSource="{Binding Path=MyItems}">
<toolkit:DataGridTemplateColumn
Header="Property1">
<toolkit:DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding Path=Property1, ValidatesOnDataErrors=true}"/>
</DataTemplate>
</toolkit:DataGridTemplateColumn.CellTemplate>
<toolkit:DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<ComboBox
SelectedValue="{Binding Path=Property1, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}"
IsEditable="True"
IsSynchronizedWithCurrentItem="False"
ItemsSource="{Binding Source={StaticResource dataValuesProvider}, Mode=OneWay}"
/>
</DataTemplate>
</toolkit:DataGridTemplateColumn.CellEditingTemplate>
</toolkit:DataGridTemplateColumn></toolkit:DataGrid>
Now, I have this problem.
I have to update the dataValuesProvider with different value on each rows. Then I have insert a reset of dataValuesProvider (dataValuesProvider=null) on selectionchanged event of datagrid.
(The dataValuesProvider will load after a input on a specific cell of the selected row).
This is the problem: when I reset the dataValuesProvider (on selectionchanged of a new row) it's modified the SelectedValue of ComboBox and the Property1 of previous row is cleared.
I think that there is this behavior becouse the editing template of cell not update the binding associations until I edit the cell. It's right?
How can I do to avoid this problem?
I have not yet resolved
however I have defined a simple project that show the problem.
You can download it from this link: http://pollosky.it/wp-content/uploads/2009/12/ObjectProviderTest.zip
Try to selectvalue from the second cell of the first row and then go to the second row. The value of property of first row is cleared!
How can I do?