Collapse all and Expand all Button on the header of GridView

[Ravi]

Hi,

how do i achieve a PLUS and MINUS symbol on the header to collapse and expand all functionality on the RADGRIDVIEW. I am using the latest version.

Thanks,
Shiras

[Vanya Pavlova]

Hi David,

 

May you provide a bit more details about your exact requirement? Do you need to change the expander button either in the GridViewGroupRow or the expand button in GridViewRow? Any additional information about the desired final result would be highly appreciated. Thus we would be able to provide you with an adequate solution. 

Kind regards,
Vanya Pavlova
the Telerik team

[Ravi]

On the header of the parent row grid, i will need a button which will help the user upon clicking will either collapse all the rows which are expanded nor expand all the rows which are collapsed.

but intention is to give an option to the user to expand all rows and collapse all rows on a single click, the user should not have to goto each row expand/collapse.

Hope this clears?

Thanks

[Vanya Pavlova]

Hi David,

 

You can use ExpandAllHierarchyItems()/CollapseAllHierarchyItems() methods of RadGridView for hierarchy. Once you may get access to the GridViewToggleButton in you need to subscribe to the Checkec/UnChecked events of GridViewToggleButton and apply the appropriate logic:

private void RadGridView_RowLoaded(object sender, Telerik.Windows.Controls.GridView.RowLoadedEventArgs e)
      {
          var row = e.Row as GridViewRow;
          if (row != null)
          {
              var toggleButton = row.ChildrenOfType<GridViewToggleButton>().FirstOrDefault();
              if (toggleButton != null)
              {

                //your code
              }
          }
      }

Best wishes,
Vanya Pavlova
the Telerik team