Custom front end product sorting - Sitefinity - Ecommerce

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Posted by Community Admin on 06-Oct-2012 00:00

I am working on a way to sort the list of products by inheriting from Telerik.Sitefinity.Modules.Ecommerce.Catalog.Web.UI.ProductsView

Here is my codes so far:

Public Class ProductList

Inherits Telerik.Sitefinity.Modules.Ecommerce.Catalog.Web.UI.ProductsView

Private m_sortOrderOverride As String = String.Empty

Public Property SortOrderOverride() As String

Get

Return m_sortOrderOverride

End Get

Set(ByVal value As String)

m_sortOrderOverride = value

End Set

End Property

Protected Overrides Sub LoadView(viewName As String)

MyBase.LoadView(viewName)

If Not String.IsNullOrEmpty(m_sortOderOverride) Then

Dim listView As Telerik.Sitefinity.Web.UI.ContentUI.ContentViewMasterDefinition = MyBase.ControlDefinition.Views.Item(0)

listView.SortExpression = m_sortOrderOverride

End If

End Sub

End Class

The issues I am having is that setting the SortOrderOverride to any sort string utilizing custom fields defined in the product type causes the following exception.

[NullReferenceException: Object reference not set to an instance of an object.]

Telerik.Sitefinity.Data.Linq.Dynamic.ExpressionParser.ParseComparison() +64

Telerik.Sitefinity.Data.Linq.Dynamic.ExpressionParser.ParseLogicalAnd() +54

Telerik.Sitefinity.Data.Linq.Dynamic.ExpressionParser.ParseLogicalOr() +54

Telerik.Sitefinity.Data.Linq.Dynamic.ExpressionParser.ParseExpression() +27

Telerik.Sitefinity.Data.Linq.Dynamic.ExpressionParser.ParseOrdering() +43

Telerik.Sitefinity.Data.Linq.Dynamic.DynamicQueryable.OrderBy(IQueryable source, String ordering, Object[] values) +203

Telerik.Sitefinity.Data.Linq.Dynamic.DynamicQueryable.OrderBy(IQueryable`1 source, String ordering, Object[] values) +29

Telerik.Sitefinity.Data.DataProviderBase.SetExpressions(IQueryable`1 query, String filterExpression, String orderExpression, Nullable`1 skip, Nullable`1 take, Nullable`1& totalCount) +304

Telerik.Sitefinity.Modules.Ecommerce.Catalog.Web.UI.Views.ProductsMasterView.GetDataSource() +908

Telerik.Sitefinity.Modules.Ecommerce.Catalog.Web.UI.Views.ProductsMasterView.ProductsListView_NeedDataSource(Object sender, RadListViewNeedDataSourceEventArgs e) +47

Telerik.Web.UI.RadListView.OnNeedDataSource(RadListViewNeedDataSourceEventArgs e) +197

Telerik.Web.UI.RadListView.AutoDataBind(RadListViewRebindReason rebindReason) +183

Telerik.Web.UI.RadListView.OnPreRender(EventArgs e) +38

System.Web.UI.Control.PreRenderRecursiveInternal() +112

System.Web.UI.Control.PreRenderRecursiveInternal() +221

System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4200

I suspect that the base query does not contain the custom fields.

Does anyone have a workaround?

Thanks,
-jm

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