Creating custom umbraco datatypes revisited Again

The upcoming umbraco Juno release (umbraco 4.6) will be introducing data editor settings these make it a lot easier to create custom datatypes that have settings (more details on the blog)

On this blog I’ve got a couple of posts that outline the changes in the creation of custom datatypes, looks like we’ve gone from 250 lines of code to 70 lines of code.

In these posts I’m always creating the same datatype: a textarea that has a limit on the number of characters, you can set the limit on the datatype settings


18/11/2008 - Creating custom umbraco datatypes 
old school,  3 classes +- 250 lines of code

29/03/2009 - Creating custom umbraco datatypes revisited
introduction of abstract data editor ( 2 classes +- 200 lines of code)

Coming in umbraco Juno - Introduction of  DataEditorSettings (single class +- 70 lines of code)

Using DataEditorSettings

Dynamic creation of the prevalue editor (settings editor), by simply marking a property with the DataEditorSetting property.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using umbraco.cms.businesslogic.datatype;
namespace DataEditorSettings.CustomDataEditorUsingDataEditorSettings
    //using data editor settings
    public class DataType : umbraco.cms.businesslogic.datatype.AbstractDataEditor
        private CharlimitControl control = new CharlimitControl();
            description = "Maximum number of characters", 
            defaultValue = "250")]
        public string Limit { get; set; }
        // Set ID, needs to be unique
        public override Guid Id
                return new Guid("1BA9853C-8772-43A8-937B-E865B21DFDDA");
        //Set name, (is what appears in data editor dropdown)
        public override string DataTypeName
                return "CharLimit (using data editor settings)";
        public DataType()
            //set rendercontrol
            base.RenderControl = control;
            //init event
            control.Init += new EventHandler(control_Init);
            //save event
            base.DataEditorControl.OnSave += 
                new umbraco.cms.businesslogic.datatype.AbstractDataEditorControl.SaveEventHandler(
        void control_Init(object sender, EventArgs e)
            control.Text = base.Data.Value != null ? base.Data.Value.ToString() : "";
            control.Limit = string.IsNullOrEmpty(Limit) ? "250" : Limit;
        void DataEditorControl_OnSave(EventArgs e)
            base.Data.Value = control.Text;


Download the sample project to see the impact (you’ll have to be running a build of Juno from at least 19/11 if you want to test it , get it here )

1 Comment so far

  1. John on October 2nd, 2012

    Trying this in 4.9 and it’s very helpful thank you.
    Everything is mostly working…
    The only problem I am having is that my UserControl is added I know it is working in the ControlGrapper and the code all steps through nicely.
    However - the user control is present and i can read and write from it’s public properties and it contains only an Image control and some static text, but it does not appear ie for some reason by ASCX is the but not visible. Any ideas what this could be?

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