Collapse Expand rows in nested DataGrid

Collapse Expand rows in nested DataGrid

Posted by: Swapnil.Walwadkar on 5 December 2018, 7:55 pm EST

• 

  Swapnil.Walwadkar

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  Posted 5 December 2018, 7:55 pm EST

  Hello,
  
  I am using 3 nested Datagrids to display some stats. [Parent > Child > Grand child]
  
  I want to Collapse/Expand all the rows in all 3 DataGrids on a single button click.
  
  Please let me know the smartest way to implement the same.

  Thank You.

• 

  basant.khatiyan

  

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  Posted 6 December 2018, 9:20 pm EST

  Hi,
  
  For expanding and Collapsing all rows on single button click you can make use of Button.Click and C1DataGrid.RowDetailsVisibilityChanged events in combination as follows:

  
  private void visibiltyButton_Click(object sender, RoutedEventArgs e)
  {
   doChange = true;
   var visibility = (Visibility)Enum.Parse(typeof(Visibility), visibilityButton.Tag.ToString());
   if (visibility == Visibility.Visible)
   {
    (sender as Button).Tag = Visibility.Collapsed;
    parentGrid.Rows.ToList().ForEach(x => x.DetailsVisibility = Visibility.Collapsed);
   }
   else
   {
    (sender as Button).Tag = Visibility.Visible;
    parentGrid.Rows.ToList().ForEach(x => x.DetailsVisibility = Visibility.Visible);
   }
   doChange = false;
  }
  private void parentGrid_RowDetailsVisibilityChanged(object sender, C1.WPF.DataGrid.DataGridRowEventArgs e)
  {
   if (doChange && e.Row.DetailsPresenter!=null)
   {
    var detailGrid = (e.Row.DetailsPresenter.Content as C1DataGrid);
    var visibility = (Visibility)Enum.Parse(typeof(Visibility), visibilityButton.Tag.ToString());
    detailGrid.Rows.ToList().ForEach(x => x.DetailsVisibility = visibility);
    }
  }
  
  

  Please refer the attached sample(prj_NestedDataGrids.zip) for complete implementation.
  
  Thank you.
  
  prj_NestedDataGrids.zip