Question

I need some help creating this extension method.

My view inherits from

<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/NoSideMenu.Master"
Inherits="System.Web.Mvc.ViewPage<List<MyProject.Models.Customer>>" %>

And I have a grid control defined by

<% Html.Telerik().Grid(Model)
    .Name("customer-history-grid").Footer(false).Columns(columns =>
    {
        columns.Bound(o => o.IsValidCustomer).Title(Html.Resource("ValidCustomerTableHeader"));
    }
    ).Pageable(pager => pager.PageSize(25))
    .Footer(true)
    .Render(); 
    %>

Here I don’t want to display the boolean value. Instead I want to display Y or N. For example if o.IsValidCustomer is true then Y else N.

I tried writing the below extension method

public static string ConvertToString<T, TValue>(this HtmlHelper<T> helper, Expression<Func<T, TValue>> expression)
    {
        ......
    }

But my extension method picks up the List<MyProject.Models.Customer> type and not the Customer object. So I cannot select the method o.IsValidCustomer in the lambda expression for example

in View…

columns.Bound(o => o.IsValidCustomer).Format(Html.ConvertToString(o => o.IsValidCustomer)).Title(Html.Resource("ValidCustomerTableHeader"));

Answer 1

Would it be possible to edit your domain model?

E.g. add this

public string IsValidCustomerString
{
    get { return IsValidCustomer ? "Y" : "N"; }
}

Then just bind that as a column?

HTHs,
Charles