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

[Satyaprakash]

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.

[Jack]

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
the Telerik team

Instantly find answers to your questions at the new Telerik Support Center

[Satyaprakash]

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.

[Jack]

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
the Telerik team

Instantly find answers to your questions at the new Telerik Support Center