custom backoffice section unhandled exception - Extending Umbraco

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Vasiliy 10 posts 50 karma points

Aug 17, 2013 @ 16:00

0

Custom backoffice section - unhandled exception

Hello,

I create an application in the backoffice. I followed the steps given on umbraco.tv and modifyed the code appropriatelly as I use version 6 (not 4). I managed to create a backend section with the tree populated with one custom node. But when I try to use "Create" method from the section dropdown menu, I get the following error:

Server error in application /. Value cannot be null. Parameter name: type

Stack trace:

[ArgumentNullException: Value cannot be null. Имя параметра: type]

System.Activator.CreateInstance(Type type, Boolean nonPublic) +9643926

umbraco.presentation.create.dialogHandler_temp.Create(String NodeType, Int32 TypeId, Int32 NodeId, String Text) +305

umbraco.cms.presentation.create.controls.simple.sbmt_Click(Object sender, EventArgs e) +220

System.Web.UI.WebControls.Button.OnClick(EventArgs e) +118

System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +112

System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10

System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13

System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36

System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563

Any ideas are greatelly appreciated :)

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Vasiliy 10 posts 50 karma points

Aug 17, 2013 @ 16:01

My code is the following:

LoadCustomTree.cs

using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Text; using System.Web; using Umbraco.Core; using Umbraco.Core.Configuration; using Umbraco.Core.IO; using umbraco.BusinessLogic.Actions; using umbraco.businesslogic; using umbraco.cms.businesslogic.template; using umbraco.cms.presentation.Trees; using umbraco.interfaces;

namespace CustomUmbracoSection.Trees { [Application("custom", "custom", "custom.gif")] public class ContentApplicationDefinition : IApplication { }

[Tree("custom", "custom", "Custom", "Applicants_small.gif", "Applicants_small.gif")]
public class LoadCustomTree : BaseTree
{
    public LoadCustomTree(string application) : base(application) { }



    protected override void CreateRootNode(ref XmlTreeNode rootNode)
    {
        rootNode.Icon = FolderIcon;
        rootNode.OpenIcon = FolderIconOpen;
        rootNode.NodeType = "init" + TreeAlias;
        rootNode.NodeID = "init";


    }

    protected override void CreateRootNodeActions(ref List<IAction> actions)
    {
        actions.Clear();
        actions.Add(ActionNew.Instance);
        actions.Add(ActionRefresh.Instance);
    }

    protected override void CreateAllowedActions(ref List<IAction> actions)
    {
        actions.Clear();
        //actions.Add(ActionRefresh.Instance);
        actions.Add(ActionDelete.Instance);

    }

    public override void Render(ref XmlTree tree)
    {


        XmlTreeNode xNode = XmlTreeNode.Create(this);
        xNode.NodeID = "1";
        xNode.Text = "Custom node";
        xNode.Action = "javascript:openCustom('" + "1" + "');";
        xNode.Icon = "doc.gif";
        tree.Add(xNode);

    }

    public override void RenderJS(ref StringBuilder Javascript)
    {
        Javascript.Append(
           @"
                function openCustom(id) {
                    parent.right.document.location.href = 'custom/editCustom.aspx?id=' + id;
                }
            ");
    }
}

}

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Custom backoffice section - unhandled exception