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Problem with nullable DateTime property
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Ozzy Knox
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Ozzy Knox asked on 17 Nov 2010, 07:17 PM

I am reasonably new to Telerik MVC extensions. I have implemented my first instance in a view successfully. I am not implementing my second view using the Telerik MVC Grid, however the class that is being bound to the grid has 2 columns which are of type Nullable. When I run my code, the view spits out an error as follows:

The model item passed into the dictionary is null, but this dictionary requires a non-null model item of type 'System.DateTime'.

I originally thought this might be a rendering problem with a template that only works with DateTime and not Nullable, but then I totally took out any columns displaying these DataTime? properties.

My code is as follows:

View code for Telerik MVC Grid

<%= Html.Telerik().Grid(Model.ScheduledCourseList)
.Name("ScheduledCoursesGrid")
.ToolBar(commands => commands.Insert().ButtonType(GridButtonType.Image).ImageHtmlAttributes(new { style = "margin-left:0" }))
.DataKeys(keys => keys.Add(sc => sc.Id))
.DataBinding(dataBinding =>
    dataBinding.Ajax()
        .Select("_List", "Course")
        .Insert("_InsertAjax", "Course")
        .Update("_UpdateAjax", "Course")
        .Delete("_DeleteAjax", "Course")
)
.Columns(columns =>
{
    columns.Bound(c => c.Id).Width(20);
    //columns.Bound(c => c.ScheduledDateTime).Width(120);
    //columns.Bound(c => c.Location).Width(150);
    columns.Command(commands =>
    {
        commands.Edit().ButtonType(GridButtonType.Image);
        commands.Delete().ButtonType(GridButtonType.Image);
    }).Width(180).Title("Commands");
})
.Editable(editing => editing.Mode(GridEditMode.PopUp))
.Sortable()
.Footer(true) %>


DTO

public class ScheduledCourseDTO
{
    public int Id { get; set; }
    public int CourseId { get; set; }
    public int CourseProviderId { get; set; }
    public DateTime? ScheduledDateTime { get; set; }
    public DateTime? EndDateTime { get; set; }
    public string Location { get; set; }
    public int SiteId { get; set; }
 
    public decimal CostBase { get; set; }
    public decimal CostPerAttendee { get; set; }
    public decimal PricePerAttendee { get; set; }
    public int MaxAttendees { get; set; }
    public int CancellationDays { get; set; }
 
    public bool Deleted { get; set; }
}

Does anybody have an idea how I can solve this?


2 Answers, 1 is accepted

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Atanas Korchev
Telerik team
answered on 18 Nov 2010, 08:24 AM
Hello Ozzy Knox,

 Please check this forum thread which describes how to deal with this problem.

Regards,
Atanas Korchev
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Ozzy Knox
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answered on 18 Nov 2010, 08:57 AM
Thank you Atanas.

I actually did read the thread you mention in your answer prior to posting my question.  However, when I upgraded to the 2010 Q3 release, my project did not include the EditorTemplates folder inside Views/Shared, so this is why I didn't see the templates before.  I clicked on Show All Files in my Solution Explorer and have seen the EditorTemplates folder and can now make the change as described in the thread link you provided.  I have made the change as per that thread and it is now working.

Thanks for the prompt response.
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Atanas Korchev
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