@inject FileService fileService

<div>
    <img src=@profilePictureUrl />
    <h4>@user.DisplayName</h4>
    <p>@user.Settings["Jahrgang"] - @user.Settings["Fachrichtung"]</p>
</div>

@code {
    [Parameter]
    public User user { get; set; }

    private string profilePictureUrl = "";

    protected override async Task OnInitializedAsync()
    {
        if(user.PhotoFileId != null)
        {
            File f = await fileService.GetFileAsync(user.PhotoFileId);
            profilePictureUrl = f.Url;
        }
    }
}