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How to show contetxt menun on rows which appear as a result of groupby.

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GridView
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Satyaprakash
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Satyaprakash asked on 30 Jun 2008, 03:19 PM
Hi,


I have applied group by expression on Country and City column of  a Table which contain information of comapnies using a windows form RadgridView control.

Now I want to show a context menu  when the user right click on the row which contain the (GridGroupExpanderCellElement and GridRowHeaderCellElement)
i.e  (+ Country :England and City:London).

Is the above functionality possible ?

If yes please expalin it with an example
.



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Jack
Telerik team
answered on 01 Jul 2008, 11:58 AM
Hi Satyaprakash,

Thank you for this question.

Up to the question: Yes, implementing this functionality with RadGridView is possible.

Generally, you should process the ContextMenuOpening event and set a context menu. This message is fired every time when RadGridView shows a context menu. However, group rows in grid doesn't show a context menu. Because of this you should process the MouseDown event and get the element hovered by the mouse using the GetElementAtPoint method.

Consider the following code snippet:

void radGridView1_MouseDown(object sender, MouseEventArgs e) 
    if (e.Button == MouseButtons.Right) 
    { 
        RadGridView grid = (RadGridView)sender; 
        GridCellElement cell = grid.ElementTree.GetElementAtPoint(e.Location) as GridCellElement; 
        if (cell != null && cell.RowInfo is GridViewGroupRowInfo) 
        { 
            if ((string)cell.RowInfo.Cells["Country"].Value == "England" && 
                (string)cell.RowInfo.Cells["City"].Value == "London"
            { 
                RadDropDownMenu menu = new RadDropDownMenu();                         
 
                RadMenuItem item = new RadMenuItem("Item 1"); 
                item.Click += new EventHandler(item_Click); 
                menu.Items.Add(item); 
 
                item = new RadMenuItem("Item 2"); 
                item.Click += new EventHandler(item_Click); 
                menu.Items.Add(item); 
 
                menu.Show(Control.MousePosition); 
            } 
        } 
    } 


Please let me know if you need further assistance.

Regards,
Jack
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Satyaprakash
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answered on 01 Jul 2008, 03:06 PM
Hi Jack,

Thanks for your reply.

The reply u send did provide me help. but it could  not meet my requirement.
Basically i want to show contenxt menu on any GridViewGroupRowInfo elemnt.i.e(when user click on Country: England) not on the GridGroupExpanderCellElement.
The code you send make it hard coded.so when the user click on that specific elemnt it will show contetx menu. I dont want that way.

Also the radGridView1_MouseDown event get called when the user right click on (+ sign i.e   GridGroupExpanderCellElement).

But I want to call radGridView1_MouseDown  when the user right click on (Country: England , Country: USA).

Hoping to get a reply soon.
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Jack
Telerik team
answered on 02 Jul 2008, 09:03 AM
Hi Satyaprakash,

Thank you for getting back to me.

You can exclude the GridGroupExpanderCellElement using an if statement. Check out the code below:

void radGridView1_MouseDown(object sender, MouseEventArgs e) 
    if (e.Button == MouseButtons.Right) 
    { 
        RadGridView grid = (RadGridView)sender; 
        GridCellElement cell = grid.ElementTree.GetElementAtPoint(e.Location) as GridCellElement; 
        if (cell != null && cell.RowInfo is GridViewGroupRowInfo && 
            !(cell is GridGroupExpanderCellElement) && 
            !(cell is GridRowHeaderCellElement)) 
        { 
            RadDropDownMenu menu = new RadDropDownMenu(); 
 
            RadMenuItem item = new RadMenuItem("Item 1"); 
            item.Click += new EventHandler(item_Click); 
            menu.Items.Add(item); 
 
            item = new RadMenuItem("Item 2"); 
            item.Click += new EventHandler(item_Click); 
            menu.Items.Add(item); 
 
            menu.Show(Control.MousePosition); 
        } 
    } 
}  


I hope this helps. Should you have other questions, please let me know.

Sincerely yours,
Jack
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