More in this section
Forums / Developing with Sitefinity / Custom Widget with MediaContentSelectorView

Custom Widget with MediaContentSelectorView

The forums are in read-only mode. In case that you want to directly contact the Progress Sitefinity team use the support center. In our Google Plus group you can find more than one thousand Sitefinity developers discussing different topics. For the Stack Overflow threads don’t forget to use the “Sitefinity” tag.
2 posts, 0 answered
  1. Prateek
    Prateek avatar
    4 posts
    05 Feb 2014
    05 Nov 2015
    Link to this post


    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" %>


      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"


    In SliderControlDesigner.cs:

            protected virtual MediaContentSelectorView SelectorView


                    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




  2. Svetoslav Manchev
    Svetoslav Manchev avatar
    735 posts
    06 Sep 2017
    10 Nov 2015
    Link to this post
    Hi Prateek,

    You can check the implementation of the Image selector described in that documentation article:

    Svetoslav Manchev
    Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Sitefinity CMS Ideas&Feedback Portal and vote to affect the priority of the items
2 posts, 0 answered