Binding to property of datacontext parent- WPF

Question

I have a DataGrid:

 <DataGrid x:Name="DG" ItemsSource="{Binding}" AutoGenerateColumns="False">
     <DataGrid.Columns>
          <DataGridTextColumn Header="?" Binding="{Binding l}">
          </DataGridTextColumn>
     </DataGrid.Columns>
  </DataGrid>

In DataContext of the DataGrid there is the collection of class X:

public ObservableCollection<xxx> col{ get; set; }// = DataContext of DG

    private string lName;

    public string LName
    {
        get { return lName; }
        set
        {
            lName= value;
            NotifyPropertyChanged("LName");
        }
    }

I want lName will be the header of a particular column in DataGrid

I try this way:

 <DataGridTextColumn  Binding="{Binding l}">//l=prop of xxx class that contains the collection
                                <DataGridTextColumn.HeaderTemplate>
                                    <DataTemplate>
                                        <TextBlock Text="{Binding DataContext.LName,
                       RelativeSource={RelativeSource AncestorType=DataGrid}}"/>
                                    </DataTemplate>
                                </DataGridTextColumn.HeaderTemplate>
                            </DataGridTextColumn>

It did not work

how can do this?

What is `l` - Please post a better example of your ViewModel — Blachshma, Feb 05 '13 at 12:24
I edited the question, if it is so necessary then l is a string and also working with Notify ... — Hodaya Shalom, Feb 05 '13 at 12:29

score 17 · Accepted Answer · answered Feb 05 '13 at 12:37

17

Try {Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}, Path=DataContext.LName}

Also I wouldn't play with name cases. WPF is pretty case-sensivity. Avoid of using one-symbol names

answered Feb 05 '13 at 12:37

Andrey Gordeev

30,606
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This does not appear to work because the DataGridColumn is not apart of the visual tree. So it can't do the lookup. Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Window' This is on the VisibilityProperty in the column. This question seems to answer it with x:Reference http://stackoverflow.com/questions/22073740/binding-visibility-for-datagridcolumn-in-wpf – user99999991 Jul 16 '16 at 02:05

score 1 · Answer 2 · answered Feb 05 '13 at 12:25

1

Binding paths are also case-sensitive. There is no property lName in your DC.

answered Feb 05 '13 at 12:25

Marius

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Binding to property of datacontext parent- WPF

2 Answers2