Index
@page "/"
<p></p>
<p></p>
<p>GroupId:@(GrupId==null?"Null":GrupId.ToString())</p>
<p>GroupIdAux:@GrupIdAux</p>
<p>String selected: @TumAtikTipleri[GrupIdAux].Deger1</p>
<MatSelect Label="Atık Tipi" @bind-Value="@GrupIdAux" Style="width:100%">
@foreach (var item in TumAtikTipleri)
{
<MatOption Value="@item.Id">@item.Deger1</MatOption>
}
</MatSelect>
@code
{
public int? GrupId = null;
public int GrupIdAux
{
set{
GrupId = (value==0?(int?)null:value);
}
get {
return (GrupId==null?0:GrupId.Value);
}
}
public List<(int Id, string Deger1)> TumAtikTipleri =
new List<(int Id, string Deger1)>{
(0, "No value (mull)"),
(1, "One"),
(2, "Two"),
};
}
namespace BlazorFiddleProject
{
using Microsoft.AspNetCore.Components.Builder;
using Microsoft.Extensions.DependencyInjection;
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
}
public void Configure(IComponentsApplicationBuilder app)
{
app.AddComponent<App>("app");
}
}
}
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<meta name="viewport" content="width=device-width">
<title>BlazorFiddleProject</title>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<script src="_content/MatBlazor/dist/matBlazor.js"></script>
<style>
app { }
</style>
<script type="text/javascript">
</script>
</head>
<body>
<app>Loading...</app>
<script src="_framework/blazor.webassembly.js"></script>
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
</body>
</html>
Add component
BlazorFiddle was updated from Blazor 0.7 to .NET 6.0.
Your old source code could not work. You need to upgrade to latest.