小编Abh*_*ngh的帖子

我正在研究从数据库中获取数据的 C# API。我在数据库中插入了大约19500条记录以测试性能。这里，sampledData包含19500条记录。

var sampledData = await _dataContext.ItemsData
                                    .Include(i => i.ProcedureItem)
                                    .Include(i => i.ProcedureItem.ProcedureItem)
                                    .Include(i => i.ProcedureItem.ProcedureItemAll)
                                    .Where(i => i.Procedure.Status == true &&
                                                i.isValid== true &&
                                                i.Procedure.ID== ID).ToListAsync();

// Foreach loop on 19500 records to filter data and store them info list
var filteredList = new List<ProcedureFilteredData>();

foreach(var s in sampledData )
{
    if (filteredList.Any(i => i.ProcedureItem == s.ProcedureItem.ProcedureItem.Name))
    {
        continue;
    }

    var pData = new ProcedureFilteredData
    {
        ProcedureItemAll = s.ProcedureItem.Name
    };

    filteredList.Add(pData);
} …