Can I handle the event of expand/collapse detail table

[Han]

I have a detail table view inside a master table, and I wish that I can handle the  event when I click on the expand/collapse icon so that I am program behind. I wonder if it is possible to control the eventhandler of expand/collapse detail table view

[Shinu]

Hi Han,

You can either use the ItemCommand event or ItemDataBound event for this purpose.

CS:

  protected void RadGrid1_ItemCommand(object source, GridCommandEventArgs e)
    {
        if (e.CommandName == "ExpandCollapse")
        {

        }
    }

 
or

protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)
    {
        if (e.Item is GridDataItem)
        {
            GridDataItem item = (GridDataItem)e.Item;
            if (item.Expanded)
            {

            }
        }
   }

Thanks
Shinu

[Han]

Thank you very much. It has been a great help. :)

[Shinu]

Hi Han,

You can also refer the following help articles to get more details on accessing the Detailtables/items in the code behind.

Traversing detail tables/items in Telerik RadGrid
Distinguish grid rows in hierarchy on ItemCreated/ItemDataBound

Cheers
Shinu.

[Eric]

I have a grid with 3 levels of heirarchy. What I want is that whenever I open the first level of the heirarchy, I wanted the child nodes to expand as well. How do I do this?

[Shinu]

Hi Eric,

Try the following code snippet to achieve the desired scenario.

CS:

 protected void RadGrid1_PreRender(object sender, EventArgs e)
    {

        foreach (GridDataItem item in RadGrid1.MasterTableView.Items)
        {
            if (item.Expanded)
            {

                GridTableView nestedView = ((GridDataItem)item).ChildItem.NestedTableViews[0];
                foreach (GridItem childitem in nestedView.Items)
                {
                    childitem.Expanded = true;

                }

            }
        }
    }

Thanks
Shinu.

[Eric]

Thanks Shinu for your quick response. It worked although it rendered the expand/collapse action of the middle node moot- as the mother node above it dictates whether it is expanded or collapsed.