Blazor Razden Dropdown Multiple Select - preselect value

[Fatima]

@Mark_Stevens

private object _selectedItem;

Hi,

I'm trying to set the preselected values from another table for the multiselect dropdown.
But I'm getting and object reference error.Is there any Solution to preselect items in the dropdown ?

< <RadzenDropDown Multiple="true" Placeholder="Select..." Data="@bosDistrictslist" TextProperty="DistrictName" ValueProperty="Id"
Style="margin-bottom: 20px; width:200px;" @bind-Value="@selecteddistrictids" Change="@(args => Change(args, "DropDown with multiple selection"))"
@bind-SelectedItem="@_selectedItem">

...
IEnumerable bosDistrictslist;
object selecteddistrictids;
object selectedbosDistricts;
object _selectedItem;

protected override async Task OnInitAsync()
{
BosBoardMotionsList = await DataService.GetBosBoardMotionsAsync();
// Get districts list
bosDistrictslist = await DataService.GetBosDistrictsAsync();

    // Get board members list

    bosMemberslist = await DataService.GetBosmembersAsync();

    selectedbosDistricts = (from dist in bosDistrictslist
                            where dist.Id == 1
                            select dist);

    _selectedItem = selectedbosDistricts;


}

void Change(object value, string name)
{
events.Add(DateTime.Now, $"{name} value changed to {string.Join(",", ((IEnumerable)CustomerIDs))}");
}

Thanks,
Fatima

[enchev]

Hi Fatima,

Here is what I've tried using our demo:

and here is the result

[Fatima]

Thank you so much for the reply with sample code.
After changing the Value from integer to String I was able to make it work.
Earlier my selected values were a list of integers.

Thanks,
Fatima