[英]Parse Hierarchial Linq to XML
我正在嘗試解析此數據:
<Product>
<ProductName>Climate Guard</ProductName>
<Tag>ClimateGuard</Tag>
<SupportPage>~/Support/ClimateGuard.aspx</SupportPage>
<ProductPage>~/Products/ClimateGuard.aspx</ProductPage>
<ProductCategories>
<ProductCategory>Climate Guard</ProductCategory>
<PartNumbers>
<PartNumber Primary="true">CLIMATE GUARD</PartNumber>
<PartNumber>CLIMATEGUARD LT</PartNumber>
<PartNumber>CLIMATE GUARD STARTER KIT</PartNumber>
<PartNumber>SENSOR MODULE</PartNumber>
<PartNumber>SWCH INP MODULE</PartNumber>
<PartNumber>TEMP SENSOR</PartNumber>
<PartNumber>HUMIDITY SENSOR</PartNumber>
<PartNumber>DOOR CONTACT</PartNumber>
<PartNumber>MOTION SENSOR</PartNumber>
<PartNumber>FLOOD DETECTOR</PartNumber>
<PartNumber>SMOKE DETECTOR</PartNumber>
<PartNumber>TILT SENSOR</PartNumber>
<PartNumber>SENSOR CABLE</PartNumber>
<PartNumber>PWR INP CABLE</PartNumber>
<PartNumber>100FT 2-WIRE</PartNumber>
<PartNumber>RJ25 COUPLER</PartNumber>
</PartNumbers>
</ProductCategories>
<Downloads>
<Download>
<Version>1.0.27</Version>
<Url>~/Files/Downloads/ClimateGuard_Firmware_1_0_27.bin</Url>
<Comment>Firmware</Comment>
</Download>
<Download>
<Version>1.0.6</Version>
<Url>~/Files/Downloads/ClimateGuard_BuiltInModule_1_0_6.bin</Url>
<Comment>Built-in Module</Comment>
</Download>
<Download>
<Version>1.0.2</Version>
<Url>~/Files/Downloads/ClimateGuard_SensorModule_1_0_2.bin</Url>
<Comment>Sensor Module</Comment>
</Download>
<Download>
<Version>1.0.0</Version>
<Url>~/Files/Downloads/ClimateGuard_SwitchInputModule_1_0_0.bin</Url>
<Comment>Switch Input Module</Comment>
</Download>
</Downloads>
</Product>
我正在嘗試獲取零件編號列表,但是,只有第一個出現:
產品類別氣候防護部件號氣候防護
我的零件號代碼有什么問題:
public List<Products> GetProducts()
{
XElement myElement = XElement.Load(HttpContext.Current.Server.MapPath("~/App_Data/products.xml"));
var query = from a in myElement.Elements("Product")
select new Products
{
ProductName = a.Element("ProductName").Value,
Tag = a.Element("Tag").Value,
SupportPage = a.Element("SupportPage").Value,
ProductPage = a.Element("ProductPage").Value,
ProductCategories = from b in a.Elements("ProductCategories")
select new ProductCategories
{
ProductCategory = b.Element("ProductCategory").Value,
//PartNumbers = GetPartNumbers(myElement.Elements("Product").Elements("ProductCategories").Elements("PartNumbers").Elements("PartNumber"))
PartNumbers = from c in b.Elements("PartNumbers")
select new PartNumbers
{
PartNumber = c.Element("PartNumber").Value
}
},
Downloads = from bb in a.Elements("Downloads").Elements("Download")
select new Downloads
{
Comment = bb.Element("Comment").Value,
Url = bb.Element("Url").Value,
Version = bb.Element("Version").Value
},
};
return query.ToList();
}
所有類型(ProductName,Tag等)都是字符串。 PartNumbers是一個IEnumerable。
當前,您沒有獲得PartNumber
元素值的集合,而是僅獲得其父PartNumbers
元素,且其內部的第一個PartNumber
子元素的值。 如果要使用PartNumbers
類而不是簡單的字符串值列表,則它應類似於:
public class PartNumbers
{
// list instead of single value
public List<string> Numbers { get; set; }
}
並且應該這樣解析:
PartNumbers = new PartNumbers {
Numbers = b.Element("PartNumbers").Elements()
.Select(c => (string)c).ToList()
}
順便說一句,為什么選擇如此奇怪的范圍變量名稱( b
用於ProductCategories
元素, a
用於產品等)? 您也可以使用簡單的List<string>
來存儲部件號(無需為此創建類):
PartNumbers = b.Element("PartNumbers").Elements().Select(c => (string)c).ToList()
您可能已經忘記了ToList()
的ProductCategories
, PartNumbers
和Downloads
。
public List<Products> GetProducts()
{
XElement myElement = XElement.Load(HttpContext.Current.Server.MapPath("~/App_Data/products.xml"));
var query = from a in myElement.Elements("Product")
select new Products
{
ProductName = a.Element("ProductName").Value,
Tag = a.Element("Tag").Value,
SupportPage = a.Element("SupportPage").Value,
ProductPage = a.Element("ProductPage").Value,
ProductCategories = (from b in a.Elements("ProductCategories")
select new ProductCategories
{
ProductCategory = b.Element("ProductCategory").Value,
//PartNumbers = GetPartNumbers(myElement.Elements("Product").Elements("ProductCategories").Elements("PartNumbers").Elements("PartNumber"))
PartNumbers = (from c in b.Elements("PartNumbers")
select new PartNumbers
{
PartNumber = c.Element("PartNumber").Value
}).ToList()
}).ToList(),
Downloads = (from bb in a.Elements("Downloads").Elements("Download")
select new Downloads
{
Comment = bb.Element("Comment").Value,
Url = bb.Element("Url").Value,
Version = bb.Element("Version").Value
}).ToList(),
};
return query.ToList();
}
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