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Can I handle the event of expand/collapse detail table

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Han
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Han asked on 17 Sep 2008, 09:04 PM
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

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Shinu
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answered on 18 Sep 2008, 03:45 AM
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
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Han
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answered on 18 Sep 2008, 02:41 PM
Thank you very much. It has been a great help. :)
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Shinu
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answered on 19 Sep 2008, 07:10 AM
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.
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Eric
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answered on 26 Sep 2008, 02:43 AM
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?
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Shinu
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answered on 26 Sep 2008, 03:32 AM
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.
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Eric
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answered on 26 Sep 2008, 03:53 AM
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.
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Shinu
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Han
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Eric
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