使用where子句中的where子句进行Linq查询会导致错误

Question

var largeset =
        from inv in context.Invoices
        join line in context.InvoiceLines on inv.InvoiceId equals line.InvoiceId
        into Lines from linejoin in Lines
        join track in context.Tracks on linejoin.TrackId equals track.TrackId
        into Tracks
        select new
        {
            Invoice = inv,
            Line = Lines,
            Track = Tracks
        };

// Filter by search term
if (!string.IsNullOrEmpty(SearchTerm))
{
    largeset = largeset.Where(x =>
            x.Invoice.Customer.LastName.StartsWith(SearchTerm) ||
            x.Invoice.Customer.FirstName.StartsWith(SearchTerm) ||
            x.Track.Where(t => t.Name.Contains(SearchTerm)).Count > 0);
}

此代码段的最后一行

x.Track.Where(t => t.Name.Contains(SearchTerm)).Count > 0

导致错误

  

错误CS0019运营商'＆gt;'不能应用于类型的操作数   '方法组'和'int'

提前致谢。

Answer 1

  

https://msdn.microsoft.com/en-us/library/bb338038(v=vs.100).aspx

您需要使用VK_FORMAT_B8G8R8A8_UNORM调用方法Count，而不是仅仅引用成员名称，就好像它是属性一样。