比较两个列表并返回常用条目

Question

我有一个供应商列表.我还有一个供应商ID列表.

    public List<SAP_Vendor> Vendors { get; set; }
    public List<string> SubcontractVendorIDs { get; set; }

我想返回List<SAP_Vendor>其中的ID位于SubcontractVendorIDs列表中的供应商.

List<SAP_Vendor> SubcontractVendors = Vendors.Select(??).ToList();

要么

List<SAP_Vendor> SubcontractVendors = Vendors.Where(??).ToList();

Answer 1

使用谓词中的Contains()方法Where():

List<SAP_Vendor> SubcontractVendors = Vendors.Where(v=> SubcontractVendorIDs.Contains(v.VendorID)).ToList();

Answer 2

您可以执行内部联接:

var query = from vendor in Vendors
            join id in SubcontractVendorIDs on vendor.ID equals id
            select vendor;

List<SAP_Vendor> subcontractVendors = query.ToList();