没有多个选项的多过滤器搜索 -ASP.NET MVC

Question

[已编辑]

我正在使用 ASP.NET MVC 和 EF 6。在显示有关客户姓名和客户地址的所有信息的网页上。现在我想根据客户名称或客户地址过滤记录。下面是我在客户 table 和地址 Table 中搜索搜索文本的逻辑，但它仍然只按客户名称搜索。

public class Address
{
    public int AdressID;

    public string Street;
    
    public string city;

    public string Zip;
    
}

public class Customer
{
    public int CustomerId;

    public string CustomerName;
    
    public string AdressId;

    public int CustomerActive;

    public virtual Address Address;
    
    public virtual ICollection<Site> Sites;

}

这就是我在控制器中所做的。

public AllCustomerList GetCustomersV2WithFilterAsync(FilterQuery fr)
        {
            var searchText = GetFilterForSearchText(fr, FilterType.SearchText);

            this.DatabaseContext.DisableLazyLoading();
            var totalCount = 0;
  
            var customerQuery = this.DatabaseContext.Customers.AsNoTracking().Where(p => 
                                p.customerActive.HasValue && p.customerActive.Value)
                .Include(p => p.Address)
                .Include(p => p.ExternalSystemCustomerIntegrations)
                .Include(p => p.Address1)
                
        
          if (!string.IsNullOrEmpty(searchText))
            {   
               
               //This query will search the string in customer table
                customerQuery = customerQuery.Where(c => c.customerName.Contains(searchText));
                
               
                //In this following code section the searchtext will be queried for customer address and customer Name 
                
                    // searching according to customer Adress
                    customerQuery = customerQuery.Where(c =>
                       c.Address.street.Contains(searchText)
                    || c.Address.street2.Contains(searchText)
                    || c.Address.city.Contains(searchText)
                    || c.Address.County.Contains(searchText)
                    || c.Address.zip.Contains(searchText)
                    );
                
               }
customerQuery = customerQuery.OrderByDescending(p => p.customerID);
                totalCount = customerQuery.Count();
                var customers = customerQuery.GetPaginatedData(fr.Offset, fr.RecordSet, totalCount > 0).ToList();

Answer 1

这里有几点需要注意。

构建 LINQ 查询时，只有在需要实现数据时才会执行。
到那时为止，查询将保留为可以执行的表达式。
您可以通过多种方式强制执行查询，例如，在查询末尾 .ToList()。

另一件事是，在您的代码中，您搜索地址详细信息的逻辑是在您的客户名称搜索之后。但重要的是，它只是添加到客户姓名查询中。因此，从本质上讲，只有当搜索文本包含在他们的姓名和地址的一部分中时，您才能找到客户。

您可以通过多种方式解决这个问题。
或者，结合名称和地址查询：

if (!string.IsNullOrEmpty(searchText))
{   
    customerQuery = 
        customerQuery.Where(c => c.customerName.Contains(searchText)
                              || c.Address.street.Contains(searchText)
                              || c.Address.street2.Contains(searchText)
                              || c.Address.city.Contains(searchText)
                              || c.Address.County.Contains(searchText)
                              || c.Address.zip.Contains(searchText));
}

或者生成两个单独的查询：

if (!string.IsNullOrEmpty(searchText))
{   
    var customerNameQuery = 
        customerQuery.Where(c => c.customerName.Contains(searchText));

    var customerAddressQuery =
        customerQuery.Where(c => c.Address.street.Contains(searchText)
                              || c.Address.street2.Contains(searchText)
                              || c.Address.city.Contains(searchText)
                              || c.Address.County.Contains(searchText)
                              || c.Address.zip.Contains(searchText));

    // ... use the new queries ...
}

没有多个选项的多过滤器搜索 -ASP.NET MVC

Multiple filter Searching without having multiple options -ASP.NET MVC

c#

linq

asp.net-mvc-4

asp.net-web-api

entity-framework-6