c# - 使用 Linq 从 XML 填充类

Question

我有以下 XML

<?xml version="1.0" encoding="utf-8"?>
<Applications   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
                xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<Blocks>
    <Block Name="block1">
        <Attributes>
            <Tag>Attribute1</Tag>
            <Layer>layer1</Layer>
        </Attributes>
        <Attributes>
            <Tag>Attribute2</Tag>
            <Layer>layer2</Layer>
        </Attributes>
    </Block>
    <Block Name="block2">
        <Attributes>
            <Tag>Attribute1</Tag>
            <Layer>layer0</Layer>
        </Attributes>
    </Block>
</Blocks>
</Applications>

我想使用 linq 语句来捕获所有细节并使用以下类填充列表。即列表

public class Block
{    
public string Tag { get; set; }
    public string Layer { get; set; }
}

我试过...

List<Block> data =
(from a in xdoc.Root.Elements("Blocks")
where (string)a.Attribute("Name") == "block1"
select new Block
{
    Tag = (string)a.Element("Tag"),
    Layer = (string)a.Element("Layer")
}).ToList();

你能看出我哪里出错了吗，linq 的新手。

Answer 1

尝试:

LAMBDA 语法:

xdoc.Root.Elements("Blocks").Elements("Block")
    .Where(w => (string)w.Attribute("Name") == "block1")
    .Elements("Attributes")
    .Select(s => new Block
    {
        Tag = (string)s.Element("Tag"),
        Layer = (string)s.Element("Layer")
    });

如果要使用查询语法:

from a in (from b in xdoc.Root.Elements("Blocks").Elements("Block")
        where (string)b.Attribute("Name") == "block1"
        select b).Elements("Attributes")
        select  new Block
        {
            Tag = (string)a.Element("Tag"),
            Layer = (string)a.Element("Layer")
        };