This is a migrated thread and some comments may be shown as answers.

Invalid property or field - '____' for type: String

3 Answers 290 Views

Grid

This is a migrated thread and some comments may be shown as answers.

This question is locked. New answers and comments are not allowed.

Derek Hunziker asked on 08 Jul 2010, 09:25 PM

Hi all,

Anyone else come across this error? It occurs when I try to filter or sort any of my columns. I'm binding to Model.Users which is an IEnumberable<MembershipUser> collection...

<% Html.Telerik().Grid(Model.Users)

.Name("grid")

.Columns(columns =>

{

columns.Bound(user => user.UserName);

columns.Bound(user => user.Email);

columns.Bound(user => user.Comment);

}).Pageable().Sortable().Filterable().Render();

%>

[ArgumentException: Invalid property or field - 'UserName' for type: String]

Telerik.Web.Mvc.Infrastructure.Implementation.Expressions.MemberAccessTokenExtensions.CreateMemberAccessExpression(IMemberAccessToken token, Expression instance) +162

Telerik.Web.Mvc.Infrastructure.Implementation.Expressions.ExpressionFactory.MakeMemberAccess(Expression instance, String memberName) +111

Telerik.Web.Mvc.Infrastructure.Implementation.Expressions.PropertyAccessExpressionBuilder.CreateMemberAccessExpression() +70

Telerik.Web.Mvc.Infrastructure.Implementation.Expressions.MemberAccessExpressionBuilderBase.CreateLambdaExpression() +17

Telerik.Web.Mvc.Infrastructure.Implementation.SortDescriptorCollectionExpressionBuilder.Sort() +125

Telerik.Web.Mvc.Extensions.QueryableExtensions.ToGridModel(IQueryable queryable, Int32 page, Int32 pageSize, IList`1 sortDescriptors, IEnumerable`1 filterDescriptors, IEnumerable`1 groupDescriptors) +387

Telerik.Web.Mvc.UI.GridDataProcessor.EnsureDataSourceIsProcessed() +141

Telerik.Web.Mvc.UI.GridDataProcessor.get_PageCount() +13

3 Answers, 1 is accepted

answered on 13 Aug 2010, 05:13 PM

I think I may have found the cause of this...

I have two grids on the page. My model contains two parts: an IEnumerable<MembershipUser> and an IEnumerable<string>. The first grid is bound to the MembershipUsers and the second grid is bound to the strings. When I try and sort or filter the MembershipUser grid, the error above gets thrown.

The exception bubbles up at the definition for the second grid, so I suspected it was the second grid causing the issues. Sure enough, removing the second grid fixes everything and I can sort and filter the first grid just fine.

What's interesting is that the error complains that 'UserName' is the invalid property or field, but that second grid is not bound to MembershipUser... it's only a list of strings.

Any ideas on what I'm doing wrong here? I can provide a sample project if needed.

Thank you!