imultivalueconverter


MultiBinding Converter in CheckBox.IsChecked not called

青春壹個敷衍的年華 提交于 2020-01-16 19:11:48
问题 I have a custom combobox a multiselectioncombobox if you will, the thing is the selections depend on an other collection. I tried to bind ComboBox.IsChecked property to MultiBinding Converter but the converter isn't called. <DataTemplate> <StackPanel Orientation="Horizontal" x:Name="ItemStack" VirtualizingStackPanel.IsVirtualizing="False"> <CheckBox x:Name="CheckBoxItem" Command="{Binding SelectItem, RelativeSource={RelativeSource AncestorType={x:Type MultiSelectionComboBox}}}"

Correct way to not implement ConvertBack on a IMultiValueConverter

我的梦境 提交于 2020-01-06 04:41:28
问题 I have an object that implements IMultiValueConverter . It is used to bind visibility of a column based upon a particular permutation of a specific bool value and a specific enum value, both part of the bound data. The ConvertBack method self evidently has no meaning. On a regular IValueConverter, I could return Binding.DoNothing, but that is not an object[] so won't compile. I currently throw an exception, but that doesn't feel ideal. Is there a better way? 回答1: The correct way to implement

What has happened to MultiBinding between .NET 3.5 and .NET 4.5?

我只是一个虾纸丫 提交于 2020-01-03 15:22:54
问题 We are currently in the process of converting a project from version 3.5 to version 4.5 of .NET. We set a text box IsEnabled flagged using a multi binding with a multi binding converter. Each of the bindings has their own converter. All worked well in .NET 3.5 but in .NET 4.5 the target type that is passed to the child converter is of type object instead of bool. Is this a known issue? has MS refactored the multi binding to not pass the target type to child converters. I created a simplified

Does WPF have a set of default binding converters available?

依然范特西╮ 提交于 2019-12-25 07:58:57
问题 When creating WPF user controls I often find myself creating small converter classes when binding values. Often you need to do similar conversions, and it made me wonder whether I might be missing some existing available implementations. Does the .NET library contain any implementations of IValueConverter or IMultiValueConverter? Has there been any attempt made to create a library of reusable value converters? 回答1: There are not many built-in, public are: BooleanToVisibilityConverter

Binding to DataGridColumn with IMultiValueConverter encounters issues while using a similiar IValueConverter does not

假如想象 提交于 2019-12-24 06:45:02
问题 I have 2 Datagrid checkbox columns each with a binding. <DataGrid ItemsSource="{Binding}" Name="DataGrid1" DataContext="{Binding Source={StaticResource TableViewSource}}"> <DataGridCheckBoxColumn Header="Required" Width="50" MinWidth="50"> <DataGridCheckBoxColumn.Binding> <Binding Path="Required" Converter="{StaticResource DateTimeToBooleanConverter}"/> </DataGridCheckBoxColumn.Binding> </DataGridCheckBoxColumn> <DataGridCheckBoxColumn Header="Required Test" Width="60" MinWidth="60">

Can't access datacontext in multivalueconverter

我怕爱的太早我们不能终老 提交于 2019-12-24 04:55:07
问题 I have a usercontrol which I need to set a specific DataContext on. The usercontrol uses multivalueconverters. However, the binding in multivalueconverter fails to use the datacontext. It works fine for regular value converters. Anyone know what is going on? To clarify, below code is not similar to my real code, it's just a sample reproducing my issue. FOr example, my multivalueconverters take more than one argument. XAML: <Window x:Class="MultConvTest.Window1" xmlns="http://schemas.microsoft

Cannot set multibinding because multivalueconverter must be specified WPF

帅比萌擦擦* 提交于 2019-12-11 18:26:27
问题 i have trouble with WPF converter, it give me this error "Cannot set multibinding because multivalueconverter must be specified WPF". I look in some forums and found some informations , but its still show error My .cs code: namespace Scroll4 { /// <summary> /// Interaction logic for MainWindow.xaml /// </summary> public partial class MainWindow : Window { public MainWindow() { //WindowState = WindowState.Maximized; InitializeComponent(); } public class ScrollOffsetToVisibilityConverter :

Multibinding Multiselection ListView

旧时模样 提交于 2019-12-11 03:40:30
问题 OK I have a weird one here. What I am trying to figure out is how to have one listview, populated by an ObservableCollection, update another ListView, populated by another ObservableCollection, based on the first listview's selection and then use a valueconverter to check or uncheck a checkbox based on the selection combined with the current item in the second listview. This part I somewhat have working by using multibinding, but the part that has me stumped is when I check or uncheck an item

How can I convert the values of three sliders into a Color?

穿精又带淫゛_ 提交于 2019-11-30 09:55:48
问题 I'm trying to create a custom user control that will allow a user to define a color in WPF. I've done this before in WinForms but in WPF it seems to be not as straight forward. This is also my first time dealing with a multi-converter. The control has 3 Sliders - like so : <Slider x:Name="sdrRed" Height="32" LargeChange="5" SmallChange="1" Maximum="255" Width="321" TickPlacement="Both"/> The only difference is the name for each - sdrRed, sdrGreen, and sdrBlue. This is the multi-value

How can I convert the values of three sliders into a Color?

坚强是说给别人听的谎言 提交于 2019-11-29 18:07:35
I'm trying to create a custom user control that will allow a user to define a color in WPF. I've done this before in WinForms but in WPF it seems to be not as straight forward. This is also my first time dealing with a multi-converter. The control has 3 Sliders - like so : <Slider x:Name="sdrRed" Height="32" LargeChange="5" SmallChange="1" Maximum="255" Width="321" TickPlacement="Both"/> The only difference is the name for each - sdrRed, sdrGreen, and sdrBlue. This is the multi-value converter : public class ByteToColorConverter : IMultiValueConverter { public object Convert( object[ ] values,

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