LINQ表达式，用于实体框架中部分字符串的精确匹配

Question

I tried to get list of MasterDto using following query.But it didnt return expected result.So i want to get exact match results of given pattern.

 // Department Code like AB,ABC,BC,...etc.
    string jobNumberPrefixPattern= departmentCode; 

 MasterDto reportDto = unitOfWork.GetRepository<MasterDto>().LinqQuery
                                (m => m.CreateUserid.ToUpper() == userName.ToUpper()
                                      && m.JobNumberTemp.StartsWith(jobNumberPrefixPattern))
                                 .OrderByDescending(m => m.MasterPk)
                                 .FirstOrDefault();

JobNumberTemp is string field and its created based on departmentCode and next value of number.samples are like as follows.

• AB-0001
• AB-0002
• ABC-0001

Here I used string.StartsWith , instead of using this is there any suggestions to do ?

Answer 1

Your query is fine. The value you're using for jobNumberPrefixPattern is the problem. ABC starts with AB, if your pattern is AB then I returning ABC values is expected. If you want AB and not ABC you should use AB- as your jobNumberPrefix.