c# - 明显不在 Entity Framework 中工作

Question

获取文档名称列表的函数，仅具有不同的...

public static List<DocumentTypeModel> GetUploadedDocumentsName(int TicketId)
{
    List<DocumentTypeModel> documents = new List<DocumentTypeModel>();
    using (var db = new UnitOfWork())
    {
        documents = db.tbl_TrnTicketDocument.Get(x => x.FK_TicketId == TicketId && x.IsActive == true).Select(s => new DocumentTypeModel()
        {
            DocumentTypeNameEnglish = s.tbl_MstDocumentType.DocumentTypeNameEnglish
        }).Distinct().ToList();
    }
    return documents;
}

目前的结果是这样的-

Affidavit in Case of Cancelled Will/No Will

Affidavit in Case of Cancelled Will/No Will

Allotment Letter

Allotment Letter

Death Certificate

Death Certificate

Lease Deed

Lease Deed

Photo Identity of Applicant

Photo Identity of Applicant

Possession Letter

Possession Letter

Registered/Unregistered Will

Registered/Unregistered Will

Answer 1

您可以像这样使用 groupby 并选择第一个选项:

List<DocumentTypeModel> documents = new List<DocumentTypeModel>();
using (var db = new UnitOfWork())
{
   documents = db.tbl_TrnTicketDocument.Get(x => x.FK_TicketId == TicketId && x.IsActive == true).Select(s => new DocumentTypeModel()
   {
   DocumentTypeNameEnglish = s.tbl_MstDocumentType.DocumentTypeNameEnglish
   }).ToList();

   documents = documents.GroupBy(x => x.DocumentTypeNameEnglish).Select(g => g.First());
}