Hello Everyone,

                        I already create custom section in backend of umbraco, everything work fine(add, update) except deleting node( right click on node and click delete). , I follow http://www.nibble.be/?p=71 to implement my custom section. I try to comment code in method ITask.Delete but error still happen. The error that I got is "Sys.Net.WebServiceFailedException: The server method ‘Delete’ failed with the following error: System.NullReferenceException– Object reference not set to an instance of an object" it show in javascript error in status bar of IE8 . Any solution to solve the problem ?.

                        Umbraco V 4.0.2.1

                       .Net V 3.5

                       Window Xp IIS6

                        Here is source code on deleting:                         

 

bool ITask.Delete()

{

 

/*string id = helper.Request("id");

if (string.IsNullOrEmpty(id))

{

return false;

}*/

 //this.m_parentID = Convert.ToInt32(id);

 

 

ShopManagement shopManagement = ShopManagement.GetShopById(this

.m_parentID);

 

if (shopManagement == null

)

 

return false

;

shopManagement.Delete();

 

return true

;

 

Here is source code on render:

 

public override void Render(ref XmlTree tree)

{

 

List<ShopManagement> shopList = ShopManagement.GetAllShop();

 

if (shopList != null)

{

 

foreach (ShopManagement shopmgn in shopList)

{

 

 

XmlTreeNode node = XmlTreeNode.Create(this);

node.NodeID = shopmgn.Id.ToString();

node.Action =

string.Format("javascript:openShop({0});", shopmgn.Id.ToString());

node.Icon =

"folder.gif";

node.OpenIcon =

"folder_o.gif";

node.Text = shopmgn.Name;

 

//node.Source = this.GetTreeServiceUrl(node.NodeID);

tree.Add(node);

}

 

}

 

 

 

}

 

public override void RenderJS(ref StringBuilder Javascript)

{

Javascript.Append(

 

@"

function openShop(id) {

parent.right.document.location.href = 'apw/controls/shop/Shop.aspx?id=' + id;

}

"

 

);

}

Thanks in advance,

Ks