[英]XML Response to Linq
我的XML響應如下所示：
"<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
<HotelAvailResponse xmlns="http://www.juniper.es/webservice/2007/">
<AvailabilityRS Url="http://xml.bookingengine.es"
TimeStamp="20130327T14:38:54.6916528+01:00"
IntCode="lCf65bPrG+x7VDLB0IquVNQgKloRA9+HOuhfHMj0BcE=">
<Results>
<HotelResult Code="7b0LYEzfsd0HH90sd" JPCode="JP003600" DestinationZone="39303" JPDCode="JPD000014">
<HotelInfo>
<Name>Hotel Test</Name>
<Description>A spacious, quiet, light and bright hotel, with a garden and fabulous views across the city.</Description>
<Images>
<Image>http://www.bookingengine.es/images/upload_p/hoteltest.jpeg</Image>
</Images>
<HotelCategory>1 1/2 Stars</HotelCategory>
<HotelType Type="SKI">Snow</HotelType>
<Address>c/tap</Address>
</HotelInfo>
<HotelOptions>
<HotelOption RatePlanCode="dcFZbKty1cJGKeRtgxIDGUZAprp1mua8ySl4iVIZ7NVKBF/PGk8lhZlN7Hcszjs2RwUR2Dxsrv5l0cZDORKz6frEmPdibqOyV2Jg4Dxz8/bF5gqPyQR8+z1LEu8LCVlS" Status="OK">
<Board Type="AD">Bed&Breakfast</Board>
<Prices>
<Price Type="S" Currency="USD">
<TotalFixAmounts Gross="353.65" Nett="353.65">
<Service Amount="321.5"/>
<ServiceTaxes Included="true" Amount="32.15"/>
<Commissions Included="true" Amount="0"/>
<HandlingFees Included="true" Amount="0"/>
<Discount Amount="-0"/>
</TotalFixAmounts>
</Price>
</Prices>
<HotelRooms>
<HotelRoom Units="1" Source="1" AvailRooms="12">
<Name>Double Room</Name>
<RoomCategory Type="DBL">Double Standard</RoomCategory>
</HotelRoom>
<HotelRoom Units="1" Source="2" AvailRooms="45">
<Name>Single</Name>
<RoomCategory Type="SGL">Single Standard</RoomCategory>
</HotelRoom>
</HotelRooms>
</HotelOption>
<HotelOption RatePlanCode="dcFZbKty1cJGKeRtgxIDGUZAprp1mua8ySl4iVIZ7NVKBF/PGk8lhZlN7Hcszjs2RwUR2Dxsrv5l0cZDORKz6frEmPdibqOyV2Jg4Dxz8/bmoX041DU9+3D3nHCEB/6vYKbVtJR2qaHwW9VnnWl/KA==" Status="OK">
<Board Type="AD">Bed&Breakfast</Board>
<Prices>
<Price Type="S" Currency="USD">
<TotalFixAmounts Gross="353.65" Nett="353.65">
<Service Amount="321.5"/>
<ServiceTaxes Included="true" Amount="32.15"/>
<Commissions Included="true" Amount="0"/>
<HandlingFees Included="true" Amount="0"/>
<Discount Amount="-0"/>
</TotalFixAmounts>
</Price>
</Prices>
<HotelRooms>
<HotelRoom Units="1" Source="1" AvailRooms="12">
<Name>Double Room</Name>
<RoomCategory Type="DBL">Double Standard</RoomCategory>
</HotelRoom>
<HotelRoom Units="1" Source="2" AvailRooms="11">
<Name>Double Room</Name>
<RoomCategory Type="DBL">Double Standard</RoomCategory>
</HotelRoom>
</HotelRooms>
<AdditionalElements>
<HotelOffers>
<HotelOffer>
<Name>Basic Discount 10%</Name>
</HotelOffer>
</HotelOffers>
</AdditionalElements>
</HotelOption>
</HotelOptions>
</HotelResult>
</Results>
</AvailabilityRS>
</HotelAvailResponse>
</soap:Body>
</soap:Envelope>"
我對此響應有此Linq，如下所示：
XNamespace ns = "http://schemas.xmlsoap.org/soap/envelope/";
var hotels = (from hotelData in data.Descendants(ns + "Envelope").Descendants(ns + "Body").Descendants("HotelAvailResponse").Descendants("HotelAvailResult").Descendants("Results").Descendants("HotelResult")
select new Hotel
{
Code = hotelData.Attribute("Code").Value,
JpCode =
hotelData.Attributes().Any(x => x.Name == "JPCode")
? hotelData.Attribute("JPCode").Value
: "",
DestinationZone =
hotelData.Attribute("DestinationZone") != null
? hotelData.Attribute("DestinationZone").Value
: string.Empty,
JpdCode = hotelData.Attribute("JPDCode").Value,
//HotelName = Convert.ToString(hotelData.Element("Item").Value),
//Rating = Convert.ToInt32(hotelData.Element("StarRating").Value),
HotelInfo = (from hi in hotelData.Descendants("HotelInfo")
select new HotelInfo
{
Name = hi.Element("Name").Value,
Description = hi.Element("Description").Value,
Image = (from img in hi.Descendants("Images") select new Imagez { Images = img.Element("Image").Value }).ToList(),
HotelCategory = hi.Element("Name").Value,
HotelType = hi.Element("Description").Value,
Address = hi.Element("Description").Value,
}
).ToList(),
HotelOptions = (from ho in hotelData.Descendants("HotelOptions")
select new HotelOptions()
{
HotelOption = ho.Element("HotelOption").Attribute("RatePlanCode").Value,
Board = ho.Element("Board").Attribute("Type").Value,
Prices = (from pr in ho.Descendants("Prices") select new Prices() { Price = pr.Element("Price").Value,
TotalFixAmounts = (from tfa in pr.Descendants("TotalFixAmounts") select new TotalFixAmounts()
{ Service = tfa.Element("Service").Attribute("Amount").Value,
ServiceTaxes = tfa.Element("ServiceTaxes").Attribute("Included").Value,
AmountServiceTaxes = tfa.Element("ServiceTaxes").Attribute("Amount").Value,
Commissions = tfa.Element("Commissions").Attribute("Included").Value,
AmountCommissions = tfa.Element("Commissions").Attribute("Amount").Value,
HandlingFees = tfa.Element("HandlingFees").Attribute("Included").Value,
AmountHandlingFees = tfa.Element("HandlingFees").Attribute("Amount").Value,
Discount = tfa.Element("Amount").Attribute("Included").Value,
}).ToList(),
}).ToList(),
}).ToList(),
}).ToList();
return hotels;
我沒有錯誤，也沒有任何異常，但是返回的酒店數量為0。我是Linq的初學者。 任何幫助將不勝感激，並且已經連續7個小時了，我正在尋找幫助並嘗試將其完成。 現在我感到死胡同了。
提前致謝。
您發布的代碼存在一些問題。
第一個問題是代碼沒有考慮分配給<HotelResult>的名稱空間。 命名空間為http://wwww.juniper.es/webservice/2007/ ，並且繼承自<HotelAvailResponse>元素。 您可以將名稱空間視為xmlns屬性：
<HotelAvailResponse xmlns="http://www.juniper.es/webservice/2007/">
這就是您的LINQ查詢未返回任何內容的原因-它正在尋找具有XML命名空間http://schemas.xmlsoap.org/soap/envelope的 <HotelAvailResponse> ，並且該節點不存在，因此您得到一個空集合。 每次調用Descendants或Element ，都需要包含名稱空間（即ns + "ElementName" ）。
在代碼正常運行之前，第二個問題並不明顯，但是下面的語句
HotelOptions = (from ho in hotelData.Descendants(ns + "HotelOption")
將導致<HotelOption>和<Board>僅出現一次（即列表1），而不出現兩次。 <price>信息和<TotalFixAmounts>正確填充-我不確定為什么，但可能與<TotalFixAmounts>的嵌套列表有關。 可以通過將選擇更改為<HotelOption>來輕松解決，如下所示：
HotelOption = (from ho in hotelData.Descendants("HotelOption")
現在ho將是<HotelOption>節點及其子節點的集合，這兩個節點都將被處理，並且嵌套列表也將被處理。
接下來，您的LINQ語句存在一些問題，這些問題將引發空引用異常（假設名稱空間問題已得到糾正）。 這些是：
Board = ho.Element("Board").Attribute("Type").Value;
ho是所有<HotelOptions>節點及其子級的集合-但是<Board>是<HotelOption>的子級，而<HotelOption>本身是<HotelOptions>的子<HotelOptions> 。 使用XML時，請記住它本質上是分層的.Element(elementName)將訪問具有該名稱的第一個元素，該元素是父元素的子元素（不是子元素，也不是子元素）。 一個相當簡單的解決方案是將<HotelOption>添加到語句中：
Board = ho.Element(ns + "HotelOption").Element(ns + "Board").Attribute("Type").Value;
這里發生類似的問題：
TotalFixAmounts = (from tfa in pr.Descendants("Prices") select new
pr是<Prices>節點的集合，但是select語句中引用的元素是<Price>子元素，而不是<Prices>子元素。 Element(elementName)將獲取父元素的第一個子節點，並且<Prices>除了<Price>之外沒有其他子節點。
最后，沒有<Amount>元素是<TotalFixAmounts>的子元素，因此以下行還將引發null引用異常：
Discount = tfa.Element("Amount").Attribute("Included").Value;
代替您使用的兩個三元運算符，我建議使用(string) -顯式強制轉換將安全地處理缺少的元素或屬性。 如果缺少元素或屬性，則代碼不會失敗，它將對該屬性沒有任何值。
因此，將所有這些放在一起，您將得到：
XNamespace ns = "http://www.juniper.es/webservice/2007/";
var hotels = (from hotelData in data.Root.Descendants(ns + "HotelResult")
select new Hotel
{
Code = (string)hotelData.Attribute("Code"),
JpCode = (string)hotelData.Attribute("JPCode"),
DestinationZone = (string)hotelData.Attribute("DestinationZone"),
JpdCode = (string)hotelData.Attribute("JPDCode"),
HotelInfo = (from hi in hotelData.Descendants(ns + "HotelInfo")
select new HotelInfo
{
Name = (string)hi.Element("Name"),
Description = (string)hi.Element(ns + "Description"),
Image = (from img in hi.Descendants(ns + "Images")
select new Imagez
{
Images = (string)img.Element(ns + "Image")
}).ToList(),
HotelCategory = (string)hi.Element(ns + "Name"),
HotelType = (string)hi.Element(ns + "Description"),
Address = (string)hi.Element(ns + "Description"),
}).ToList(),
HotelOptions = (from ho in hotelData.Descendants(ns + "HotelOption")
select new HotelOptions
{
HotelOption = ho.Attribute("RatePlanCode").Value,
Board = ho.Element(ns + "Board").Attribute("Type").Value,
Prices = (from pr in ho.Descendants(ns + "Prices")
select new Price
{
Price = (string)pr.Element(ns + "Price"),
TotalFixAmounts = (from tfa in pr.Descendants(ns + "Price").Descendants(ns + "TotalFixAmounts")
select new TotalFixAmounts
{
Service = tfa.Element(ns + "Service").Attribute("Amount").Value,
ServiceTaxes = tfa.Element(ns + "ServiceTaxes").Attribute("Included").Value,
AmountServiceTaxes = tfa.Element(ns + "ServiceTaxes").Attribute("Amount").Value,
Commissions = tfa.Element(ns + "Commissions").Attribute("Included").Value,
AmountCommissions = tfa.Element(ns + "Commissions").Attribute("Amount").Value,
HandlingFees = tfa.Element(ns + "HandlingFees").Attribute("Included").Value,
AmountHandlingFees = tfa.Element(ns + "HandlingFees").Attribute("Amount").Value
}).ToList(),
}).ToList(),
}).ToList(),
}).ToList();
注意，對Descendants或Element每個引用都在其中包含名稱空間ns 。
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