LINQ to XML LIKE子句

时间:2011-04-19 06:07:26

标签: c# linq-to-xml traversal

给出以下XML

<?xml version="1.0"?>
<Message>
      <ArrayOfStock xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
            <Stock>
                  <StockID>9cddb639-25ee-4415-be07-3109e5ae9883</StockID>
                  <Description>Stock Item 0</Description>
            </Stock>
            <Stock>
                  <StockID>f89f02f9-b359-48c8-8d2f-3a950837f4fb</StockID>
                  <Description>Stock Item 1</Description>
            </Stock>
            <Stock>
                  <StockID>3338ec80-f59e-4979-a04c-f7d52e386bb7</StockID>
                  <Description>Stock Item 2</Description>
            </Stock>
      </ArrayOfStock>
</Message>

有没有更好/更正确的方法来返回消息的子项WHERE子项的名称以“ArrayOf”开头呢?

IEnumerable<XElement> array = from arrayOfX 
                              in document.Root.Elements() 
                              where arrayOfX.Name.ToString().IndexOf("ArrayOf") > -1
                              select arrayOfX;

PS:对于边缘情况也存在问题,其中IndexOf()将为String.Empty值返回0。 (虽然不确定那些在格式良好的XML中是否真的有可能 - 不要认为它是?)

2 个答案:

答案 0 :(得分:3)

答案 1 :(得分:0)

返回模拟xml结构的对象的更好方法是什么?是。创建一个对xml结构进行建模的类,并将xml序列化为:

[XmlRootAttribute("ArrayOfStocks")]
public class Stocks 
{     
    [XmlArrayItem(typeof(Stock))]     
    public Stock[] Stocks { get; set; }  
}
public class Stock
{
    public StockID { get; set; }

    public Description { get; set; }
}
    public class Message
    {
        public Stocks { get; set; }

        public static Message Load( string xml )
        {
                var deserializer = new XmlSerializer( typeof( Stocks ) );
                Stocks stocks = null;
                using( TextReader textReader = new StringReader( data ) )
                {
                    stocks = (Stocks)deserializer.Deserialize( textReader );
                }

                return stocks;
        }
    }

然后您可以通过以下方式访问股票阵列:

var message = Message.Load( "<xml>" );
foreach( var stock in message.Stocks )
{
   Console.WriteLine( stock );
}

然后,在你的'边缘案例'中,你不必担心它。 Stocks数组将只是空出来。