Pfthb

I needed to make the columns in different Grids move dependently on each other. I found a good solution:

1. In the properties create value
   


2. In the xamlI create a binding:

 <Grid.ColumnDefinitions>
 <ColumnDefinition 
 Width="Binding Source=x:Static properties:Settings.Default, Path=GridColumnWidth,
 Converter=StaticResource ColumnWidthConverter, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged"
 MinWidth="50"></ColumnDefinition>
 <ColumnDefinition Width="Auto"></ColumnDefinition>
 <ColumnDefinition Width="*" MinWidth="50"></ColumnDefinition>
</Grid.ColumnDefinitions>

3. And implement converter:

public class ColumnWidthConverter : IValueConverter

 public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
 
 if (value is string str && !str.Equals("*"))
 return new GridLength(double.Parse(str));
 return new GridLength(1, GridUnitType.Star);
 

 public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
 
 if (value is GridLength gridLength)
 return gridLength.Value.ToString(CultureInfo.InvariantCulture);
 return "*";
 

Now I needed to do the same in CodeBehind. I do this:

ColumnDefinition propertyNameColumnDefinition = new ColumnDefinition();
propertyNameColumnDefinition.MinWidth = 50;
BindingOperations.SetBinding(propertyNameColumnDefinition, WidthProperty, CreateBindingForColumnWidth());
ColumnDefinition gridSplitterColumnDefinition = new ColumnDefinition() Width = GridLength.Auto ;
ColumnDefinition propertyValueColumnDefinition = new ColumnDefinition();
propertyValueColumnDefinition.MinWidth = 50;
grid.RowDefinitions.Add(headerRowDefinition);
grid.ColumnDefinitions.Add(propertyNameColumnDefinition);
grid.ColumnDefinitions.Add(gridSplitterColumnDefinition);
grid.ColumnDefinitions.Add(propertyValueColumnDefinition);
.......
private Binding CreateBindingForColumnWidth()

 Binding b = new Binding
 
 Source = mpESKD.Properties.Settings.Default,
 Path = new PropertyPath("GridColumnWidth"),
 Mode = BindingMode.TwoWay,
 UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged,
 Converter = new ColumnWidthConverter()
 ;
 return b;

In this case, nothing works.
What am I doing wrong?

Must be:

BindingOperations.SetBinding(propertyNameColumnDefinition, ColumnDefinition.WidthProperty, CreateBindingForColumnWidth());

Thank for ASh for his comment