您好几天前刚刚参加过LINQ-XML,想知道我做错了什么,或者是不可能做到这一点。我已经四处寻找并且没有任何与我有关的问题,而且我现在已经捣乱了一下。
XML:
<catalog>
<product description="Cardigan Sweater" product_image="cardigan.jpg">
<catalog_item gender="Men's">
<item_number>QWZ5671</item_number>
<price>39.95</price>
<size description="Medium">
<color_swatch image="red_cardigan.jpg">Red</color_swatch>
<color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
</size>
<size description="Large">
<color_swatch image="red_cardigan.jpg">Red</color_swatch>
<color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
</size>
</catalog_item>
<catalog_item gender="Women's">
<item_number>RRX9856</item_number>
<price>42.50</price>
<size description="Small">
<color_swatch image="red_cardigan.jpg">Red</color_swatch>
<color_swatch image="navy_cardigan.jpg">Navy</color_swatch>
<color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
</size>
<size description="Medium">
<color_swatch image="red_cardigan.jpg">Red</color_swatch>
<color_swatch image="navy_cardigan.jpg">Navy</color_swatch>
<color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
<color_swatch image="black_cardigan.jpg">Black</color_swatch>
</size>
<size description="Large">
<color_swatch image="navy_cardigan.jpg">Navy</color_swatch>
<color_swatch image="black_cardigan.jpg">Black</color_swatch>
</size>
<size description="Extra Large">
<color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
<color_swatch image="black_cardigan.jpg">Black</color_swatch>
</size>
</catalog_item>
和查询:
var query =
from size in
(
from catalogItem in cardigan.Descendants("catalog_item")
where catalogItem.Attribute("gender").Value == "Men's"
select catalogItem.Descendants("size")
)
select size.Elements("color_swatch");
这基本上让我得到了男士们的所有color_swatch,但我一直试图看看我是否可以获得男士大号的所有color_swatch。
提前致谢。
答案 0 :(得分:0)
只需将您的查询更改为
即可 var query =
from size in
(
from catalogItem in cardigan.Descendants("catalog_item")
where catalogItem.Attribute("gender").Value == "Men's"
select catalogItem.Descendants("size")
)
where size.Attribute("description") == "Large"
select size.Elements("color_swatch");
这样可行,因为您首先获得适用于男性的所有“尺寸”项目,然后从该列表中过滤那些仅抓取“大”的项目。
答案 1 :(得分:0)
var query =
from catalogItem in cardigan.Descendants("catalog_item")
where catalogItem.Attribute("gender").Value == "Men's"
from size in catalogItem.Descendants("size")
where size.Attribute("description").Value == "Large"
select size.Elements("color_swatch");
花了大约8个小时,但我明白了!
我去了,基本上得到了几个复杂的xml样本。我想这就是你学习的方式。 :)
谢谢你们:)