"Error

Look at my code below:
----------------------------------------------------------
1) MasterListView.ascx

<%@ Control Language="C#" %>
<%@ Register Assembly="Telerik.Sitefinity, Version=4.2.1733.0, Culture=neutral, PublicKeyToken=b28c218413bdf563" Namespace="Telerik.Sitefinity.Web.UI.ContentUI" TagPrefix="sf" %>
<%@ Register Assembly="Telerik.Sitefinity, Version=4.2.1733.0, Culture=neutral, PublicKeyToken=b28c218413bdf563" Namespace="Telerik.Sitefinity.Web.UI" TagPrefix="sf" %>
<%@ Register Assembly="Telerik.Web.UI, Version=2011.2.712.40, Culture=neutral, PublicKeyToken=121fae78165ba3d4" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>


<h1>Testimonials</h1>


<telerik:RadListView ID="TestimonialsList" 
ItemPlaceholderID="ItemsContainer" GroupPlaceholderID="GroupContainer" GroupItemCount="3" runat="server" 
EnableEmbeddedSkins="false" EnableEmbeddedBaseStylesheet="false">
    <LayoutTemplate>
        <div class="Testimonials">
            <asp:PlaceHolder ID="GroupContainer" runat="server" />
        </div>
    </LayoutTemplate>
    <GroupTemplate>
        <div class="row">
            <asp:PlaceHolder ID="ItemsContainer" runat="server" />
        </div>
    </GroupTemplate>
    <ItemTemplate>
        <div class="column-small">
            <div class="block">
<h3><sf:DetailsViewHyperLink ID="DetailsViewHyperLink" TextDataField="Title" ToolTipDataField="Description" runat="server" /></h3>
<testimonial>
<sf:FieldListView ID="ClientName" runat="server" Text="0" Properties="ClientName" /><br />

<sf:FieldListView ID="TestimonialText" runat="server" Text="0" Properties="TestimonialText" />
</testimonial>
</div>
        </div>
    </ItemTemplate>
</telerik:RadListView>


<sf:Pager id="pager" runat="server" />
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2) MasterListView.cs

namespace Testimonials.PublicControls

    public class MasterListView : ViewBase

#region Override Template Properties
protected override string LayoutTemplateName

get return null;



public override string LayoutTemplatePath

get

                var path = TestimonialsModule.TestimonialsVirtualPath + layoutTemplateName;
return path;

set

base.LayoutTemplatePath = value;


#endregion


        private TestimonialsManager manager;
        protected TestimonialsManager Manager
       
            get
           
                if (this.manager == null)
                    this.manager = TestimonialsManager.GetManager(this.Host.ControlDefinition.ProviderName);


                return this.manager;
           
       






#region Control References
protected internal virtual RadListView TestimonialsListControl

get

                return this.Container.GetControl<RadListView>("TestimonialsList", true);




protected internal virtual Pager Pager

get

return this.Container.GetControl<Pager>("pager", true);


#endregion


#region Methods




protected override void InitializeControls(GenericContainer container, IContentViewDefinition definition)

            try
           
                // ensure a valid definition is passed
                var masterDefinition = definition as IContentViewMasterDefinition;
                if (masterDefinition == null) return;


                // retrieve Testimonials from the manager
                var manager = TestimonialsManager.GetManager(this.Host.ControlDefinition.ProviderName);
                var query = manager.GetTestimonials();


                // modify pager based on query results
                int? totalCount = 0;
                int? itemsToSkip = 0;
                if (masterDefinition.AllowPaging.HasValue && masterDefinition.AllowPaging.Value)
                    itemsToSkip = this.GetItemsToSkipCount(masterDefinition.ItemsPerPage, this.Host.UrlEvaluationMode, this.Host.UrlKeyPrefix);


                // culture for Urls in pager
                CultureInfo uiCulture = null;
                if (Config.Get<ResourcesConfig>().Multilingual)
                    uiCulture = System.Globalization.CultureInfo.CurrentUICulture;


                // check for additional filters set by the definition
                var filterExpression = String.Empty;


                // modify the query with everything from above
                query = Telerik.Sitefinity.Data.DataProviderBase.SetExpressions(
                    query,
                    filterExpression,
                    masterDefinition.SortExpression,
                    uiCulture,
                    itemsToSkip,
                    masterDefinition.ItemsPerPage,
                    ref totalCount);
                this.IsEmptyView = (totalCount == 0);


                // display results
                if (totalCount == 0)
                    this.TestimonialsListControl.Visible = false;
                else
               
                    this.ConfigurePager(totalCount.Value, masterDefinition);
                    System.Collections.Generic.List<Testimonial> list = query.ToList();
                    this.TestimonialsListControl.DataSource = list;
               
           
            catch(Exception ex)  



protected virtual void ConfigurePager(int virtualItemCount, IContentViewMasterDefinition masterDefinition)

if (masterDefinition.AllowPaging.HasValue &&
masterDefinition.AllowPaging.Value &&
masterDefinition.ItemsPerPage.GetValueOrDefault() > 0)

this.Pager.VirtualItemCount = virtualItemCount;
this.Pager.PageSize = masterDefinition.ItemsPerPage.Value;
this.Pager.QueryParamKey = this.Host.UrlKeyPrefix;

else

this.Pager.Visible = false;


#endregion


        internal const string layoutTemplateName = "Testimonials.Resources.Views.MasterListView.ascx";


--------------------------------
When I drag and drop this control it gives me error "Error parsing the template" in sitefinity backend editor. And I dont get any testimonial binded in telerik:RadListView. I just get "<h1>Testimonials</h1>" in output.

When I debug below lines, I found "list"  contains true data. but it doesn't show in RadListView.

System.Collections.Generic.List<Testimonial> list = query.ToList();
 this.TestimonialsListControl.DataSource = list;


Where I am doing wrong?

Hi Vaibhavi,

 After setting the DataSource of the RadListView, you will have to call DataBind in order to bind the collection to the ListView:

Now it gives me error "Object reference not set to an instance of an object." when I drag and drop the control from sitefinity backend. When I debug it, it gave an exception "This control must be hosted by ContentView control or one that derives form it."

Hi Vaibhavi,

I looked through your code and I didn't find anything disturbing. Can you please send me the whole control so I can test it here locally and see where the error is thrown and what is causing the problem?
Looking forward to hearing your answer.

How to send you file? Here only option available is for attaching image file.

Hello Vaibhavi,

 Can you upload it somewhere I can download it from - for example rapidshare or similar hosting provider (or open a support ticket) ?