HeaderContextMenu OnItemClick firing issue

[Devanand Jha]

Hi,

I want to enable DragToGroup option of Radgrid from Context menu. For this i have added new option in HeaderContextmenu's prerender event. My grid is in UserControl so cant use OnPreRenderComplete page event. 

I have added HeaderContextMenu onitemClick handler to enable DragToGroup option of radGrid, but its not firing. 

protected

 

void HeaderContextMenu_PreRender(object sender, EventArgs e)

 

{

 

RadContextMenu menu = wgEntityList.HeaderContextMenu;

 

 

RadMenuItem item = new RadMenuItem();

 

item.Text =

"Group by text";

 

menu.Items.Add(item);

}

protected

 

void HeaderContextMenu_ItemClick(object sender, RadMenuEventArgs e)

 

{

wgEntityList.ClientSettings.AllowDragToGroup =

true;

 

}

Please help me to get this event fire.

Regards
Devanand Jha

[Princy]

Hi Devanand,

Give a try with the following approach and see whether it helps.

CS:

protected void Page_Load(object sender, EventArgs e)

{

RadGrid1.HeaderContextMenu.PreRender += new EventHandler(HeaderContextMenu_PreRender);         RadGrid1.HeaderContextMenu.ItemClick += new RadMenuEventHandler(HeaderContextMenu_ItemClick);

}

void HeaderContextMenu_PreRender(object sender, EventArgs e)

{

RadContextMenu menu = RadGrid1.HeaderContextMenu;

RadMenuItem item = new RadMenuItem();

item.Text = "Group by text";

item.Attributes["ColumnName"] = string.Empty;

item.Attributes["TableID"] = string.Empty;

item.PostBack = true;

menu.Items.Add(item);

}

void HeaderContextMenu_ItemClick(object sender, RadMenuEventArgs e)

{

RadGrid1.ClientSettings.AllowDragToGroup = true;

}

Regards
Princy.

[Devanand Jha]

Hi Princy,

Thanks for reply.

It's not working.

Regards
Devanand Jha

[Princy]

Hi Deva,

The above given code is working fine on my end. Could you please send the code portion where you are adding the event handler for the ItemClick and PreRender events of the HeaderContextMenu.

Princy

[Devanand Jha]

Hi Princy,

I am adding these events handlers at PageLoad.

protected

 

void Page_Load(object sender, EventArgs e)

 

{

RadGrid1.HeaderContextMenu.PreRender +=

new EventHandler(HeaderContextMenu_PreRender);

 

RadGrid1.HeaderContextMenu.ItemClick +=

new RadMenuEventHandler(HeaderContextMenu_ItemClick);

 

}

Regards,
Devanand Jha

[Kyle Jang]

Hi Princy,

I have exactly same issue. When I debug in IE8, VS2010, it stops at middle of huge javascript and doesn't fire that event.

Error:
Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: Object reference not set to an instance of an object.

Please help.
Thanks,
Kyle

[Erik]

may-be this post helps you?

http://www.telerik.com/community/forums/aspnet-ajax/grid/headercontextmenu-add-remove-items-vb-net.aspx#1284209

Regards,

Erik