From 1c5070c7692c1d04bbc40c59baf7797c2c6fa680 Mon Sep 17 00:00:00 2001
From: hang <872297557@qq.com>
Date: Fri, 25 Nov 2022 21:43:43 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=94=B9=E4=B8=80=E8=87=B4=E6=80=A7?=
 =?UTF-8?q?=E5=88=86=E6=9E=90=E4=BB=BB=E5=8A=A1=E7=94=9F=E6=88=90?=
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---
 .../Service/Allocation/TaskConsistentRuleService.cs         | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/IRaCIS.Core.Application/Service/Allocation/TaskConsistentRuleService.cs b/IRaCIS.Core.Application/Service/Allocation/TaskConsistentRuleService.cs
index cec701d73..82a04ee8a 100644
--- a/IRaCIS.Core.Application/Service/Allocation/TaskConsistentRuleService.cs
+++ b/IRaCIS.Core.Application/Service/Allocation/TaskConsistentRuleService.cs
@@ -156,7 +156,11 @@ namespace IRaCIS.Core.Application.Service
                     {
                         var maxCodeStr = _visitTaskRepository.Where(t => t.TrialId == subject.TrialId && t.TrialReadingCriterionId == trialReadingCriterionId).OrderByDescending(t => t.BlindSubjectCode).Select(t => t.BlindSubjectCode).FirstOrDefault();
 
-                        int.TryParse(maxCodeStr.Substring(maxCodeStr.Length - filterObj.BlindSubjectNumberOfPlaces), out maxCodeInt);
+                        if (maxCodeStr != String.Empty)
+                        {
+                            int.TryParse(maxCodeStr.Substring(maxCodeStr.Length - filterObj.BlindSubjectNumberOfPlaces), out maxCodeInt);
+
+                        }                      
 
                         blindSubjectCode = filterObj.BlindTrialSiteCode + (maxCodeInt + 1).ToString($"D{filterObj.BlindSubjectNumberOfPlaces}");
                     }