在实体框架的查询中，检查字符串是否不包含C#中字符串数组的字符串

我试图获得一个特殊的计数，其中我想删除userKeysActionsArray是一个包含整数的字符串的结果，如下所示（JSON数组）：[8825485478569]

但是，当我尝试使用contains方法和NOT运算符删除时，我无法获得预期的正确数字

我不知道如何解决这个问题

非常感谢你的帮助

int count;

var query = (from a in _db.ApplicationSet
             from h in a.ApplicationApprobationStatusHistorySet
             from u in a.Mission.MissionUserSet
             where a.Mission.isDeleted == false
                && a.Mission.isArchived == false
                && a.isRefused == false
                && a.ApplicationApprobationStatus.shortCode == "APPLICATION_APPROBATION_STATUS_LM_WAITING"
                && u.userKey == ContextUser.id
                && h.ApplicationApprobationStatus.shortCode == "APPLICATION_APPROBATION_STATUS_LM_WAITING" && h.isDeleted == false
              orderby a.applicationDate
              select new ApplicationCandidateListing
              {
                  applicationKey = a.id,
                  missionKey = a.Mission.id,
                  candidateKey = a.Candidate.id,
                  statusKey = a.ApplicationStatus.id,
                  clientKey = a.Mission.Client.id,
                  candidateFirstName = a.Candidate.firstName,
                  candidateLastName = a.Candidate.lastName,
                  clientLabel = a.Mission.Client.name,
                  statusLabel = a.ApplicationStatus.label,
                  missionLabel = a.Mission.label,
                  applicationDate = a.applicationDate,
                  isCVreserveList = a.isCVreserveList,
                  isCVviewed = a.isCVviewed,
                  refuseDate = a.refuseDate,
                  isShortListed = a.isShortListed,
                  candidateGroupShortcode = a.Candidate.CandidateGroup.shortCode,
                  approbationStatusIcons = a.ApplicationApprobationStatus.iconCSS,
                  approbationStatusShortCode = a.ApplicationApprobationStatus.shortCode,
                  isInternal = a.Candidate.isInternal,
                  lineManagerKey = ContextUser.id,
                  userKeysActionsArray = h.userKeysActionsArray,
                  commentCount = a.ApplicationCommentSet.Where(ac => ac.isPrivateLineManager != true).Count()
              }).Distinct();

string chance1 = "[" + ContextUser.id.ToString() + "]";
string chance2 = "[" + ContextUser.id.ToString() + ",";
string chance3 = "," + ContextUser.id.ToString() + ",";
string chance4 = "," + ContextUser.id.ToString() + "]";

var values = new[] { chance1, chance2, chance3, chance4 };
query.Where(q => !(values.Any(q.userKeysActionsArray.Contains)));  

count = query.Count();

return count;

---

您可以在foreach中累积查询的where条件：

var query = // redacted

string chance1 = "[" + ContextUser.id.ToString() + "]";
string chance2 = "[" + ContextUser.id.ToString() + ",";
string chance3 = "," + ContextUser.id.ToString() + ",";
string chance4 = "," + ContextUser.id.ToString() + "]";

var values = new[] { chance1, chance2, chance3, chance4 };
foreach(var value in values)
{
    query = query.Where(a => !a.userKeysActionsArray?.Contains(value) ?? true);
}
return query.Count();

---

您可以在foreach中累积查询的where条件：

var query = // redacted

string chance1 = "[" + ContextUser.id.ToString() + "]";
string chance2 = "[" + ContextUser.id.ToString() + ",";
string chance3 = "," + ContextUser.id.ToString() + ",";
string chance4 = "," + ContextUser.id.ToString() + "]";

var values = new[] { chance1, chance2, chance3, chance4 };
foreach(var value in values)
{
    query = query.Where(a => !a.userKeysActionsArray?.Contains(value) ?? true);
}
return query.Count();

---

你可以按下面的方法做-

query.Where(q => !(
(q.userKeysActionsArray.Contains(chance1) ||
q.userKeysActionsArray.Contains(chance2) || 
q.userKeysActionsArray.Contains(chance3) || 
q.userKeysActionsArray.Contains(chance4))));

---

你可以按下面的方法做-

query.Where(q => !(
(q.userKeysActionsArray.Contains(chance1) ||
q.userKeysActionsArray.Contains(chance2) || 
q.userKeysActionsArray.Contains(chance3) || 
q.userKeysActionsArray.Contains(chance4))));

---

---

我相信Contains是一个需要输入参数的方法，所以请尝试将最后一行从

q.userKeysActionsArray.Contains

更改为

q.userKeysActionsArray.Contains（输入值）

您缺少了count变量的矫揉造作，是不是输入错误？@ArwynFr yes抱歉输入错误：-）将更新帖子。Thanks@Scopperloit我不知道如何改变它来测试4种可能性。像这样<代码>查询.Where（q=>！（（q.userKeysActionsArray.Contains（chance1）和&q.userKeysActionsArray.Contains（chance2）和&q.userKeysActionsArray.Contains（chance3）和&q.userKeysActionsArray.Contains（chance4））每个机会是数组还是单个字符串？我认为Contains是一个需要输入参数的方法，因此请尝试将最后一行从

q.userKeysActionsArray.Contains

更改为

q.userKeysActionsArray.Contains（输入值）

您缺少对count变量的影响，这是打字错误吗？@ArwynFr yes对不起，打字错误：-）将更新帖子。Thanks@Scopperloit我不知道如何改变它来测试4种可能性。像这样<代码>查询.Where（q=>！（（q.userKeysActionsArray.Contains（chance1）和&q.userKeysActionsArray.Contains（chance2）和&q.userKeysActionsArray.Contains（chance3）和&q.userKeysActionsArray.Contains（chance4））每一次机会都是数组还是单个字符串？我将尝试此方法，字符串“userKeysActionsArray”可能为空这一事实会导致问题吗？它工作正常！非常感谢！：-）这也是我应该做的，

foreach

是你的朋友。如果您担心NullReferenceException，请始终首先在布尔表达式中检查null。他们总是从左到右评估。尝试

query.Where（a=>a.userKeysActionsArray！=null&&！a.userKeysActionsArray.Contains（value））我添加了一个空条件运算符和一个空合并运算符来处理空情况。我将尝试此方法，字符串“userKeysActionsArray”可能为空这一事实会导致问题吗？它工作正常！非常感谢！：-）这也是我应该做的，
foreach
是你的朋友。如果您担心NullReferenceException，请始终首先在布尔表达式中检查null。他们总是从左到右评估。尝试
query.Where（a=>a.userKeysActionsArray！=null&&！a.userKeysActionsArray.Contains（value））我添加了一个null条件运算符和一个null合并运算符来处理null情况