我需要在 C# 中使用 linq 在嵌套列表中搜索乘客 [关闭]答案

【问题标题】：i need to search for passager inside of nested list using linq in c# [closed]我需要在 C# 中使用 linq 在嵌套列表中搜索乘客 [关闭]
【发布时间】：2018-01-09 11:35:34
【问题描述】：

preresponse.Where(x =>
    x.hotels.Any(h => h.Travellers.Any(t => t.FullName.ToLower().Contains(request.SearchText)
                                         || t.FirstName.ToLower().Contains(request.SearchText)
                                         || t.LastName.ToLower().Contains(request.SearchText)
                                         || t.EmailAddress.ToLower().Contains(request.SearchText))
    || x.cars.Any(c => c.Travellers.Any(t => t.FullName.ToLower().Contains(request.SearchText)
                                          || t.FirstName.ToLower().Contains(request.SearchText)
                                          || t.LastName.ToLower().Contains(request.SearchText)
                                          || t.EmailAddress.ToLower().Contains(request.SearchText))
    || x.tours.Any(s => s.Travellers.Any(t => t.FullName.ToLower().Contains(request.SearchText)
                                           || t.FirstName.ToLower().Contains(request.SearchText)
                                           || t.LastName.ToLower().Contains(request.SearchText)
                                           || t.EmailAddress.ToLower().Contains(request.SearchText))
    || x.flights.Any(f => f.Travellers.Any(t => t.FullName.ToLower().Contains(request.SearchText)
                                             || t.FirstName.ToLower().Contains(request.SearchText)
                                             || t.LastName.ToLower().Contains(request.SearchText)
                                             || t.EmailAddress.ToLower().Contains(request.SearchText))
    ))))).ToList();

我正在使用上述查询，它适用于酒店、汽车和航班，但不适用于旅游旅行者谁能在这里找到问题所在？

【问题讨论】：

标签： c# asp.net database linq

【解决方案1】：

我认为括号有问题。我已经格式化了代码，也许你的意思是这样的：

preresponse.Where(x => 
    x.hotels.Any(h => 
        h.Travellers.Any(t => 
            t.FullName.ToLower().Contains(request.SearchText) || 
            t.FirstName.ToLower().Contains(request.SearchText) || 
            t.LastName.ToLower().Contains(request.SearchText) || 
            t.EmailAddress.ToLower().Contains(request.SearchText)))
        || 
    x.cars.Any(c => 
        c.Travellers.Any(t => 
            t.FullName.ToLower().Contains(request.SearchText) || 
            t.FirstName.ToLower().Contains(request.SearchText) || 
            t.LastName.ToLower().Contains(request.SearchText) || 
            t.EmailAddress.ToLower().Contains(request.SearchText)))
        || 
    x.tours.Any(s => 
        s.Travellers.Any(t => 
            t.FullName.ToLower().Contains(request.SearchText) || 
            t.FirstName.ToLower().Contains(request.SearchText) || 
            t.LastName.ToLower().Contains(request.SearchText) || 
            t.EmailAddress.ToLower().Contains(request.SearchText)))
        || 
    x.flights.Any(f => 
        f.Travellers.Any(t => 
            t.FullName.ToLower().Contains(request.SearchText) || 
            t.FirstName.ToLower().Contains(request.SearchText) || 
            t.LastName.ToLower().Contains(request.SearchText) || 
            t.EmailAddress.ToLower().Contains(request.SearchText)))
    ).ToList();

【讨论】：

我在 preresponse 对象中预订酒店、汽车航班和旅游，然后对他们的姓名、电子邮件应用过滤器，我在酒店汽车和航空箱中得到结果，但是当我在旅游中搜索旅行者时，我为空