增加身份证芯片号未读取到后重新读取的操作

Src/GS.Terminal.VisitorSelfService/Logic/GS.Terminal.VisitorSelfService.Logic/Core/AuthenticationPageHandler.cs

@@ -290,6 +290,13 @@ namespace GS.Terminal.VisitorSelfService.Logic.Core
 
                 if (readResult != null)
                 {
+                    string cardid = readResult.cardid;
+                    if (string.IsNullOrEmpty(cardid))
+                    {
+                        MainShell.ShowPrompt("二代证读取异常，请重新刷二代证");
+                        await Task.Delay(200);
+                        continue;
+                    }
                     //读二代证大概有600到700毫秒的延迟,所以回调前再次验证一下验证方式是否变更
                     if (VM.AuthMode == ViewModels.Pages.AuthenticationPage.AuthenticationMode.IdCard)
                     {