我的 XML 文件:
<?xml version="1.0" encoding="utf-8"?>
<ArrayOfCustomer xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<Customer>
<CustomerId>1f323c97-2015-4a3d-9956-a93115c272ea</CustomerId>
<FirstName>Aria</FirstName>
<LastName>Stark</LastName>
<DOB>1999-01-01T00:00:00</DOB>
</Customer>
<Customer>
<CustomerId>c9c326c2-1e27-440b-9b25-c79b1d9c80ed</CustomerId>
<FirstName>John</FirstName>
<LastName>Snow</LastName>
<DOB>1983-01-01T00:00:00</DOB>
</Customer>
</ArrayOfCustomer>
my attempt :
XElement toEdit =
(XElement)doc.Descendants("ArrayOfCustomer")
.Descendants("Customer")
.Where(x => Guid.Parse((x.Descendants("CustomerId") as XElement).Value) == customer.CustomerId)
.First<XElement>();
这会抛出以下异常:
Object reference not set to an instance of an object.
1) x
不是一个 XElement
吗?
2) 这个 where lambda 表达式用于选择 Xml 节点是否正确?
3) 当然,你会如何根据 CustomerId
找到这个节点?