nullable values

Pages/CaritasServiceFundVeloAlternatePickupContactPage.razor

         <div class="row no-gutters w-100">
             <div class="col-12">
                 <MatSelect Class="w-100 required" Label="@i18n["Salutation"]" Outlined="true" @bind-Value="pucSalutation" Required="true" Style="margin-bottom: 0.5rem">
-                    <MatOptionString Value="sir">@i18n["Man"]</MatOptionString>
-                    <MatOptionString Value="madam">@i18n["Woman"]</MatOptionString>
+                    <MatOptionString Value="M">@i18n["Male"]</MatOptionString>
+                    <MatOptionString Value="F">@i18n["Female"]</MatOptionString>
                 </MatSelect>
             </div>
         </div>

Pages/CaritasServiceFundVeloFoundKeyDataPage.razor

         report.GeographicInfo.Latitude = bicycleGeoPosition.Latitude;
         report.GeographicInfo.Longitude = bicycleGeoPosition.Longitude;
         report.FotoString = imgUrl;
-        report.FarbeId = selectedColor != null ? selectedColor.Id : -1;
-        report.TypId = selectedBcType != null ? selectedBcType.Id : -1;
+        report.FarbeId = selectedColor != null ? selectedColor.Id : null;
+        report.TypId = selectedBcType != null ? selectedBcType.Id : null;
         if (SelectedBrand != null) {
             if (SelectedBrand.Id == -999) {
                 report.NeueMarke = SelectedBrand.Bezeichnung;

Shared/Models/FoundReport.cs

         public string AbholTelefon { get; set; }
 
 
-        public FoundReport() : this("", "", "", true, -1, -1, -1, new GeographicInfo()) {
+        public FoundReport() : this("", "", "", true, null, null, null, new GeographicInfo()) {
         }
 
-        public FoundReport(string anrede, string vorname, string nachname, bool abholadresseIstKontakt, int typId, int markeId, int farbeId, GeographicInfo geographicInfo) {
+        public FoundReport(string anrede, string vorname, string nachname, bool abholadresseIstKontakt, int? typId, int? markeId, int? farbeId, GeographicInfo geographicInfo) {
             this.Anrede = anrede;
             this.Vorname = vorname;
             this.Nachname = nachname;

Shared/Models/MissingReport.cs

         public string SuchDienstNr { get; set; }
 
 
-        public MissingReport() : this("", "", "", "", "", "", "", -1, -1, -1) {
+        public MissingReport() : this("", "", "", "", "", "", "", null, null, null) {
         }
 
         public MissingReport(string anrede, string vorname, string nachname, string mail, string personPLZ,
-                          string personOrt, string personStrasse, int typId, int markeId, int farbeId) {
+                          string personOrt, string personStrasse, int? typId, int? markeId, int? farbeId) {
             this.Anrede = anrede;
             this.Vorname = vorname;
             this.Nachname = nachname;

Shared/Models/Report.cs

         public string Nachname { get; set; }                // required
         public string Mobil { get; set; }
         public string Telefon { get; set; }
-        public int TypId { get; set; }                      // required
-        public int MarkeId { get; set; }                    // required
-        public int FarbeId { get; set; }                    // required
+        public int? TypId { get; set; }                      // required
+        public int? MarkeId { get; set; }                    // required
+        public int? FarbeId { get; set; }                    // required
         public string RahmenNummer { get; set; }
         public string Bemerkung { get; set; }
         public string Foto { get; set; }

Shared/Models/ReportResponse.cs

         public string GetDataAsFormattedList() {
             string result = "";
             foreach (string s in Data) {
-                result += s + "\r\n";
+                result += s + '\r'+'\n';
             }
             return result;
         }