Update 07082021

WebFormApp/Account/VerifyPhoneNumber.aspx.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Web;
+using System.Web.UI;
+using System.Web.UI.WebControls;
+using Microsoft.AspNet.Identity;
+using Microsoft.AspNet.Identity.Owin;
+
+namespace WebFormApp.Account
+{
+    public partial class VerifyPhoneNumber : System.Web.UI.Page
+    {
+        protected void Page_Load(object sender, EventArgs e)
+        {
+            var manager = Context.GetOwinContext().GetUserManager<ApplicationUserManager>();
+            var phonenumber = Request.QueryString["PhoneNumber"];
+            var code = manager.GenerateChangePhoneNumberToken(User.Identity.GetUserId(), phonenumber);           
+            PhoneNumber.Value = phonenumber;
+        }
+
+        protected void Code_Click(object sender, EventArgs e)
+        {
+            if (!ModelState.IsValid)
+            {
+                ModelState.AddModelError("", "Ungültiger Code.");
+                return;
+            }
+
+            var manager = Context.GetOwinContext().GetUserManager<ApplicationUserManager>();
+            var signInManager = Context.GetOwinContext().Get<ApplicationSignInManager>();
+
+            var result = manager.ChangePhoneNumber(User.Identity.GetUserId(), PhoneNumber.Value, Code.Text);
+
+            if (result.Succeeded)
+            {
+                var user = manager.FindById(User.Identity.GetUserId());
+
+                if (user != null)
+                {
+                    signInManager.SignIn(user, isPersistent: false, rememberBrowser: false);
+                    Response.Redirect("/Account/Manage?m=AddPhoneNumberSuccess");
+                }
+            }
+
+            // Wurde dieser Punkt erreicht, ist ein Fehler aufgetreten. Formular erneut anzeigen.
+            ModelState.AddModelError("", "Fehler beim Überprüfen des Telefons.");
+        }
+    }
+}