Access parameters passed to a Management Panel from a widget (IScriptablePlugin)

Question

I have a custom Management Panel that is using a widget to render its content. I am passing parameters via NameValueCollection when getting the URL - when load the panel I can see my parameters in the URL, but I'm not entirely sure how to access these parameters in my widget. 
 I tried $core_v2_page.GetQueryStringValue and that did not work.

Luke R Davidson · Accepted Answer

To fix this, you need to create a private scriptable extension and add it to your panel. using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Telligent.Evolution.Extensibility.UI.Version1;

namespace HearingFirst.Learning.Panels.Management
{
 public class PrivateExtension : IContextualScriptedContentFragmentExtension
 {
 #region IContextualScriptedContentFragmentExtension

 public string ExtensionName { get { return "private"; } }

 public object GetExtension(NameValueCollection context)
 {
 return new PrivateExtensionApi(context);
 }

 #endregion
 }

 public class PrivateExtensionApi
 {
 private NameValueCollection _context;

 public PrivateExtensionApi(NameValueCollection context)
 {
 _context = context;
 }
 public int ChapterId
 {
 get { return _context == null ? 0 : Convert.ToInt32(_context["ChapterId"]); }
 }
 public int CourseId
 {
 get { return _context == null ? 0 : Convert.ToInt32(_context["CourseId"]); }
 }
 public int ProviderId
 {
 get { return _context == null ? 0 : Convert.ToInt32(_context["ProviderId"]); }
 }
 public int RequirementId
 {
 get { return _context == null ? 0 : Convert.ToInt32(_context["RequirementId"]); }
 }
 public string RequirementTypeId
 {
 get { return _context == null ? null : _context["RequirementTypeId"]; }
 }
 public int ReactionId
 {
 get { return _context == null ? 0 : Convert.ToInt32(_context["ReactionId"]); }
 }
 public string ReactionTypeId
 {
 get { return _context == null ? null : _context["ReactionTypeId"]; }
 }
 public string TriggerTypeId
 {
 get { return _context == null ? null : _context["TriggerTypeId"]; }
 }
 }
}
 And then within the Register method of your IAdministrationExplicitPanel public void Register(IScriptedContentFragmentController controller)
 {
 _scriptController = controller;

 var fragmentOptions = new ScriptedContentFragmentOptions(_fragmentId)
 {
 CanBeThemeVersioned = false,
 CanHaveHeader = true,
 CanHaveWrapperCss = true,
 CanReadPluginConfiguration = true,
 CanWritePluginConfiguration = false,
 IsEditable = true
 };

 fragmentOptions.Extensions.Add(new PrivateExtension());

 _scriptController.Register(fragmentOptions);
 } 
 Then within your administration panel widget, you can access query string parameters like this: $private.PropertyName

Access parameters passed to a Management Panel from a widget (IScriptablePlugin)

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