Custom Widget Configuration Property

IPropertyTemplate is the new interface for defining custom widget configuration properties

https://community.telligent.com/community/11/w/api-documentation/64400/ipropertytemplate-plugin-type

What goes in the render method?  HTML and Javascript?...kind of what I'd put in a .vm file if I was to do it this way:
<property labelText="Select a Resource" id="message" dataType="string" template="searchSelection.vm" />

When you render the configuration form making use of this property, are any exceptions logged? You may have issues with the stray { } in the JavaScript of your string used with FormatString.

No exceptions.  And when I debug, it doesn't even enter the Render method

I changed my code to the below and still just get a plain text box...the Render method never fires.

        public void Render(TextWriter writer, IPropertyTemplateOptions options)
        {
            string defaultOption = "<option value=\"test\" >Search</option>";
            if (options.Value != null)
            {
                defaultOption = "<option value=\"placeholder\" >"+options.Value.ToString() + " </option>";
            }

            string script = "hello world";

            writer.Write(script);
        }

This works for me to display Hello World:

using System.Collections.Generic;
using System.IO;
using Telligent.Evolution.Extensibility.Configuration.Version1;

namespace Samples
{
    public class TestPropertyTemplate : IPropertyTemplate
	{
		#region IPlugin

		public string Name => "Test Template";

		public virtual string Description => $"template test";

		public virtual void Initialize()
		{
		}

		#endregion

		#region IPropertyTemplate

		public string[] DataTypes => new string[] { "Custom" };

		public string TemplateName => "testTemplate";

		public bool SupportsReadOnly => true;

		public virtual PropertyTemplateOption[] Options
		{
			get
			{
				var options = new List<PropertyTemplateOption>();
				return options.ToArray();
			}
		}

		public void Render(TextWriter writer, IPropertyTemplateOptions options)
		{
			string script = "hello world";

			writer.Write(script);
		}
		#endregion
	}
}

Here is the configuration declaration:

	<property id="test" defaultValue="" dataType="Custom" template="testTemplate" />

Since you're in the code already, could you try changing the case of the supported data type to "String" from "string"? 

Yes.  I got mine to work... Now I'm working backwards to try determine what was the culprit.  I'll let you know

Looks like the issue was how I was returning the PropertyTemplateOptions array.  Capitalizing "String" and keeping it lowercase worked both ways.

I got all of this working.  Is it possible to pass custom attributes to the Control?  in the XML config?   Like this:
<property id="test"  taxonomyItem="ContentType"

I added this here:  It shows in the API docs XML config now, but not sure how to access it in the Render method.

public PropertyTemplateOption[] Options
{
    get
    {
        var item = new PropertyTemplateOption("taxonomyKey", "contenttypes");
        item.IsSelectableValueOption = false;

        var options = new List<PropertyTemplateOption>();
        options.Add(item);
        return options.ToArray();
    }
}

I think I got it...Thanks for all the help on this!

I think I got it...Thanks for all the help on this!