按包含对象

Question

我有这个ActionResult：

[HttpPost]
public ActionResult ProcessesFilter( ProcessesFilterViewModel model)
    {
        IQueryable<Process> results = db.Processes
            .Include(s => s.Customers)

        if (model.Case>0)
        {
            result = result.Where(s => s.Case == model.Case);
        }

        if (model.CustomerID != null)
        {
            results = results
            .Where(s => s.Customers.CustomerID == model.CustomerID);<==== Doesnt Work
        }


        model.results = results.ToList();
        return View(model);
    }

.Where（s =＆gt; s.Customers.CustomerID == model.CustomerID）;＆lt; ====不起作用

它怎么能起作用？

Answer 1

您需要使用Any。例如：

if (model.CustomerID != null)
{
    results = results
        .Where(s => s.Customers.Any(c => c.CustomerID == model.CustomerID));
}