Matblazor: Matblazor Select Null value

[lkmcelik]

is there any way to binding matselect to null value
this is working
<select class="mdc-select__native-control" @bind="SecilenAtikGrubu.GrupId"> @foreach (var item in TumAtikTipleri) { <option value="@item.Id">@item.Deger1</option> } </select>
but this is not
<MatSelect Label="Atık Tipi" @bind-Value="@SecilenAtikGrubu.GrupId" Style="width:100%"> @foreach (var item in TumAtikTipleri) { <MatOption Value="@item.Id">@item.Deger1</MatOption> } </MatSelect>

and this is the binding class
public class GrupKodlari { [Key] public int Id { get; set; } public string Tur { get; set; } public string Isim { get; set; } public string Deger1 { get; set; } public string Deger2 { get; set; } public string Deger3 { get; set; } public int? GrupId { get; set; } public virtual GrupKodlari Grup { get; set; } }

[dinonovak]

Also facing the same issue. If MatSelect is bound to database and bound filed has NULL value, it is creating the error

System.NullReferenceException: Object reference not set to an instance of an object.
   at MatBlazor.MatOptionTypeKey`2.BuildRenderTree(RenderTreeBuilder __builder)
   at Microsoft.AspNetCore.Components.ComponentBase.<.ctor>b__6_0(RenderTreeBuilder builder)
   at Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment)
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.RenderInExistingBatch(RenderQueueEntry renderQueueEntry)
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost: Error: Unhandled exception in circuit 'sNPCplRtxjwzTlBAf1YCDGmgsWBvBOt5hX13R9wCQ7Q'.

How to handle this case when user is opening the forma and needs to fill it, so most selecions are NULL

This is how items are added to MatSelect

@foreach (var item in itemList)
{
        <MatOption TValue="int" Value="@item.id">@item.Title</MatOption>
}

[dinonovak]

Any update or I need to migrate to StringSelect ?

[lindespang]

Hi! Thanks for using MatBlazor.
I just tried it out myself and I could bind to a null value without issues, maybe this is an issue that has been solved in recent releases.

If you still have a problem with this, can you please provide an example on www.blazorfiddle.com ?

[lindespang]

Closing due to inactivity. Please reopen if this is still a problem for you.