Error with Multiselect looking for property "ChildContent" after component upgrade.

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MultiSelect
Jstemper
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Jstemper asked on 28 Mar 2022, 09:19 PM

I'm getting the following error after upgrading from 2.x to 3.x of the Blazor library. 

Unhandled exception rendering component: Object of type 'Telerik.Blazor.Components.TelerikMultiSelect` 
does not have a property matching the name 'ChildContent'.

This happens when this control attempts to load.

 <FormItem Field="@nameof(NoteVM.AssignedToUser)">
     <Template>
         <TelerikMultiSelect Data="Users"
                             AutoClose="false"
                             Placeholder="Select Assign To Users"
                             Width="100%"
                             Filterable="true"
                             TextField="@nameof(UserInfoVM.UserName)"
                             ValueField="@nameof(UserInfoVM.UserName)"
                             @bind-Value="@AssignedToUsers">
                      <MultiSelectPopupSettings>
                      <DropDownListPopupSettings Height="200px" />
                      </MultiSelectPopupSettings>
                      </TelerikMultiSelect>
     </Template>
 </FormItem>

 

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Dimo
Telerik team
answered on 29 Mar 2022, 10:17 AM

Hi John,

The error means that the <TelerikMultiSelect> tag has an invalid (not recognized) child tag:

  • The <MultiSelectPopupSettings> tag has to be wrapped by <MultiSelectSettings>.
  • <DropDownListPopupSettings> doesn't belong here at all.

See Breaking Changes in the Popup Settings and MultiSelect Popup Settings for examples.

Regards,
Dimo
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Jstemper
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Answers by
Dimo
Telerik team
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