Hey all,

I've placed a dropdown list in my custom module following:

this thread

Hi William,

Could you check whether CreateChildControls where you create each ChoiceItem is called on each request?

All the best,
Ivan Dimitrov
the Telerik team

Hi William,

Also we use a service to make the call and this might be the problem. The better option is using the library item ID (Guid) as a value of the ChoiceItem, so that you will not get wrong results when you save the content item.

Best wishes,
Ivan Dimitrov
the Telerik team

Hey Ivan,

Can you tell me where that would go?  Intellisence isn't revealing that attribute anywhere I can see in my code for ChoiceElements or fields 

Here are some snippets of code based on that linked post that I'm using in the Definitions file.

This is just in testing, so ignore the namings of variables in this.

Hello William,

You can create a control that inherits from the ChoiceField and populate it as shown below. Then you can add it as a ChiceFieldElement

public class ChoiceFieldCustom : ChoiceField
   
        public ChoiceFieldCustom()
       
            this.RenderChoicesAs = Sitefinity.Web.UI.Fields.Enums.RenderChoicesAs.DropDown;
       

        protected override void CreateChildControls()
       

            var librariesManager = LibrariesManager.GetManager();
            var albums = librariesManager.GetAlbums();
            foreach (Album alb in albums)
           
                if (alb.Items.Count > 0)
               
                    foreach (MediaContent img in alb.Items)
                   
                        ChoiceItem ci = new ChoiceItem();
                        ci.Text = img.Title;
                        ci.Value = img.Title;
                        this.Choices.Add(ci);
                   
               
           
            base.CreateChildControls();
            this.DropDown.Attributes.Add("onchange", "ddChanged(this)");
       

        protected override string LayoutTemplateName
       
            get
           
                return ChoiceFieldCustom.layoutTempalte;
           
       



        public override IEnumerable<System.Web.UI.ScriptDescriptor> GetScriptDescriptors()
       
            var descriptors = base.GetScriptDescriptors();

            var descriptor = (ScriptControlDescriptor)descriptors.Last();
            descriptor.Type = typeof(ChoiceField).FullName;

            return descriptors;
       

        private const string layoutTempalte = "Telerik.Sitefinity.Samples.Resources.ChoiceField.ascx";
   

Regards,
Ivan Dimitrov
the Telerik team

That looks intriguing , Ivan.

In this case, what would Telerik.Sitefinity.Samples.Resources.ChoiceField.ascx look like then?  I'm assuming you'd need to include that as well.

Thanks

- William

Hi William,

Here is the template

Ivan,

Awesome.  Works perfectly.  Thank you!

- William

Hi Ivan,

I've used the same class you provided except that I inherited from FormChoiceField instead of ChoiceField cos' I'm creating as custom form control.

Could you also explain a abit on what this statement means:
this.DropDown.Attributes.Add("onchange", "ddChanged(this)");
what's "ddChanged"? Is that a control name? where can I find it?

Hello? anybody help please?

@Mayvelous,

>>this.DropDown.Attributes.Add("onchange", "ddChanged(this)");
This statement creates the onchange attribute for the dropdownbox and attaches the ddChanged function written on JavaScript  to the onchange event. In the plain HTML it looks like:
<input type="select" name="....." ....... onchange="ddChanged(this)" />

When you select another item in the dropdownbox the onchange event will be fired. So, you need to define somewhere the JS function something like this:
function ddChanged(el)

alert('Item changed');


I hope this helps,
Anton

Hi Ivan,
I have taken your code "Dynamic Dropdown (ChoiceFieldElement) in Custom Module" and modified code and RenderChoicesAs class property as "checkboxes" so that i can have a custom field in module for choice selection.

Its getting me error says Expecting state 'Element'.. Encountered 'Text'  with name '', namespace ''  when i select only one item in checkbox list and publish the module. Published successfully when number of selected items are two or more than it. See attached image.

Please help.

Thanks
Vishwaraj Malik






 


 

Hi Ivan,
I have taken your code "Dynamic Dropdown (ChoiceFieldElement) in Custom Module" and modified code and RenderChoicesAs class property as "checkboxes" so that i can have a custom field in module for choice selection.

Its getting me error says Expecting state 'Element'.. Encountered 'Text'  with name '', namespace ''  when i select only one item in checkbox list and publish the module. Published successfully when number of selected items are two or more than it. See attached image.

Please help.

Thanks
Vishwaraj Malik