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Create function not working with multiselect in grid

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Evan
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Evan asked on 08 Jan 2019, 10:57 AM

I'm getting a "ReferenceError: Roles is not defined" in the javascript when I try to add a new record. It all works well for existing ones.

 

Please see info here https://stackoverflow.com/questions/54089911/create-toolbar-function-not-working-with-multiselect-in-teleris-grid-for-mvc

 

Thanks in advance.

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Viktor Tachev
Telerik team
answered on 10 Jan 2019, 09:09 AM
Hello Evan,

When a new item is created the fields in it will use the default values initially. It seems that the default value for Roles is IdentityRole. However, Roles is a collection. Try modifying the DataSource Model like this:


.Model(model =>
{
    model.Id(p => p.UserName);
    model.Field(p => p.AccessFailedCount).Editable(false);
    model.Field(p => p.Roles).DefaultValue(new List<Microsoft.AspNet.Identity.EntityFramework.IdentityRole>());
})

Also, a collection should be passed to the MultiSelect editor. Since the MultiSelect will edit specific field you can use the MultiSelectFor syntax:


@model ICollection<Microsoft.AspNet.Identity.EntityFramework.IdentityRole>
 
@(Html.Kendo().MultiSelectFor(m => m)
    .DataTextField("Name")
    .DataValueField("Id")
    .BindTo((System.Collections.ICollection)ViewData["roles"])
)


Regards,
Viktor Tachev
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Viktor Tachev
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