的LINQ to XML查询问题

Question

这里是我的XML：

<?xml version="1.0" ?> 
<AddressValidateResponse> 
    <Address ID="0"> 
    <FirmName>FIRM NAME, INC</FirmName> 
    <Address2>123 MAIN ST</Address2> 
    <City>SOME PLACE</City> 
    <State>CA</State> 
    <Zip5>90028</Zip5> 
    <Zip4>1467</Zip4> 
    </Address> 
    <Address ID="1"> 
    <Error> 
     <Number>-2147219401</Number> 
     <Source>SOURCE INFO HERE</Source> 
     <Description>Address Not Found.</Description> 
     <HelpFile /> 
     <HelpContext>1000440</HelpContext> 
    </Error> 
    </Address> 
    <Address ID="2"> 
    <FirmName>FIRM NAME, INC</FirmName> 
    <Address2>123 MAIN ST</Address2> 
    <City>SOME PLACE</City> 
    <State>CA</State> 
    <Zip5>90028</Zip5> 
    <Zip4>1467</Zip4> 
    </Address> 
    <Address ID="3"> 
    <FirmName>FIRM NAME, INC</FirmName> 
    <Address2>123 MAIN ST</Address2> 
    <City>SOME PLACE</City> 
    <State>CA</State> 
    <Zip5>90028</Zip5> 
    <Zip4>1467</Zip4> 
    </Address> 
    <Address ID="4"> 
    <Error> 
     <Number>-2147219401</Number> 
     <Source>SOURCE INFO HERE</Source> 
     <Description>Address Not Found.</Description> 
     <HelpFile /> 
     <HelpContext>1000440</HelpContext> 
    </Error> 
    </Address> 
</AddressValidateResponse> 

我需要创建两个列表。一个具有有效地址，另一个具有错误块。在上面的例子中，第一个列表将包含3个地址，第二个列表包含两个地址。不知道如何正确过滤查询。谢谢。

我能得到它与下面的工作，但我怀疑有一个更有效的方式做同样的事情：

var errors = from d in xDoc.Descendants("Address") 
         from e in d.Elements("Error") 
         where e.Element("Description").Value.Trim().ToUpper().Contains("ADDRESS NOT FOUND") 
         select new AddressObject 
         { 
          Order = (int)d.Attribute("ID"), 
          StreetAddress = "NO MATCH FOUND", 
          OtherAddress = String.Empty, 
          City = String.Empty, 
          State = String.Empty, 
          ZipCode = String.Empty, 
          ZipPlus4 = String.Empty 
         }; 

      errorList = errors.ToList(); 

    var addresses = from a in xDoc.Descendants("Address") 
         from b in a.Elements("FirmName") 
         where b.Value != String.Empty 
         select new AddressObject 
         { 
          Order = (int)a.Attribute("ID"), 
          StreetAddress = (string)a.Element("Address2") ?? String.Empty, 
          OtherAddress = (string)a.Element("Address1") ?? String.Empty, 
          City = (string)a.Element("City") ?? String.Empty, 
          State = (string)a.Element("State") ?? String.Empty, 
          ZipCode = (string)a.Element("Zip5") ?? String.Empty, 
          ZipPlus4 = (string)a.Element("Zip4") ?? String.Empty 
         }; 

    validList = addressess.ToList(); 

Answer 1

你可以尝试这样的事情 - 似乎，就必须有一个更有效的方式，但我想不出它现在...

string xmlContent = @"<?xml version=""1.0"" ?> 
<AddressValidateResponse> 
    <Address ID=""0""> 
    <FirmName>FIRM NAME, INC</FirmName> 
    <Address2>123 MAIN ST</Address2> 
    <City>SOME PLACE</City> 
    <State>CA</State> 
    <Zip5>90028</Zip5> 
    <Zip4>1467</Zip4> 
    </Address> 
    <Address ID=""1""> 
    <Error> 
     <Number>-2147219401</Number> 
     <Source>SOURCE INFO HERE</Source> 
     <Description>Address Not Found.</Description> 
     <HelpFile /> 
     <HelpContext>1000440</HelpContext> 
    </Error> 
    </Address> 
    <Address ID=""2""> 
    <FirmName>FIRM NAME, INC</FirmName> 
    <Address2>123 MAIN ST</Address2> 
    <City>SOME PLACE</City> 
    <State>CA</State> 
    <Zip5>90028</Zip5> 
    <Zip4>1467</Zip4> 
    </Address> 
    <Address ID=""3""> 
    <FirmName>FIRM NAME, INC</FirmName> 
    <Address2>123 MAIN ST</Address2> 
    <City>SOME PLACE</City> 
    <State>CA</State> 
    <Zip5>90028</Zip5> 
    <Zip4>1467</Zip4> 
    </Address> 
    <Address ID=""4""> 
    <Error> 
     <Number>-2147219401</Number> 
     <Source>SOURCE INFO HERE</Source> 
     <Description>Address Not Found.</Description> 
     <HelpFile /> 
     <HelpContext>1000440</HelpContext> 
    </Error> 
    </Address> 
</AddressValidateResponse>"; 

XDocument doc = XDocument.Parse(xmlContent); 

var errors = doc.Descendants("Address").Where(a => a.Descendants("Error").Count() > 0).ToList(); 
var real = doc.Descendants("Address").Where(a => a.Descendants("Error").Count() == 0).ToList(); 

基本上，你检查每个<Address>的XElement多少子元素与Error名称包含 - 0表示“真正的“地址，> 0表示错误条目。