Custom Widget with MediaContentSelectorView

Hi,

I am working to create a custom widget having functionality to upload the image and show that on UI. I am using MediaContentSelectorView for this purpose and facing an issue "Object reference not set to an instance of an object". I have tried many things and suggestions as found in sitefinity forums but no success.

Then I have commented whole code related to MediaContentSelectorView except the mark up on Designer(.ascx) file but the exception is same.

I have used this code:

In SliderControlDesigner.ascx file:

<%@ Register Assembly="Telerik.Sitefinity" Namespace="Telerik.Sitefinity.Modules.Libraries.Web.UI.Designers" TagPrefix="sf" %>

<sf:MediaContentSelectorView

  ID="SelectorView"
  runat="server"
  ContentType="Telerik.Sitefinity.Libraries.Model.Document"
  ParentType="Telerik.Sitefinity.Libraries.Model.DocumentLibrary"                                  LibraryBinderServiceUrl="~/Sitefinity/Services/Content/DocumentLibraryService.svc/"                             MediaContentBinderServiceUrl="~/Sitefinity/Services/Content/DocumentService.svc/"                             MediaContentItemsListDescriptionTemplate="Telerik.Sitefinity.Resources.Templates.Designers.Libraries.Documents.DocumentItemDescriptionTemplate.htm"
DisplayResizingOptionsControl="false"
 ShowOpenOriginalSizeCheckBox="false">
 </sf:MediaContentSelectorView>

In SliderControlDesigner.cs:

        protected virtual MediaContentSelectorView SelectorView
         

          get

           
                return this.Container.GetControl<MediaContentSelectorView>("SelectorView", true);
           
       

In GetScriptDescriptors() method:

descriptor.AddComponentProperty("selectorview", this.SelectorView.ClientID);

I have commented whole code related to MediaContentSelectorView except the mark up on SliderControlDesigner.ascx  file but the exception is same.

I am working on sitefinity version 8.2.5900.0 .

Please give me your suggestions and help me to get it resolved.

Thank you,

Prateek Tayal

Hi Prateek,

You can check the implementation of the Image selector described in that documentation article:
http://docs.sitefinity.com/tutorial-create-an-image-selector-for-content-items

Regards,
Svetoslav Manchev
Telerik