我正在尝试从简单的XML文档中读取元素值并将它们绑定到一个对象,但是我遇到了XML文档的问题。我已经验证了它,并且可以确认文档本身没有问题,但是在结果上扩展了结果:
var nodes = from xDoc in xml.Descendants("RewriteRule")
select xmlSerializer.Deserialize(xml.CreateReader()) as Url;
显示“XML文档(0,0)中存在错误”
内部异常读取<RewriteRules xmlns=''> was not expected.
我不确定我在这里做错了什么?
我的XML如下:
<?xml version="1.0" encoding="utf-8" ?>
<RewriteRules>
<RewriteRule>
<From>fromurl</From>
<To>tourl</To>
<Type>301</Type>
</RewriteRule>
</RewriteRules>
加载XML文件并尝试对其进行反序列化的代码: -
public static UrlCollection GetRewriteXML(string fileName)
{
XDocument xml = XDocument.Load(HttpContext.Current.Server.MapPath(fileName));
var xmlSerializer = new XmlSerializer(typeof(Url));
var nodes = from xDoc in xml.Descendants("RewriteRule")
select xmlSerializer.Deserialize(xml.CreateReader()) as Url;
return nodes as UrlCollection;
}
我的网址对象类: -
[Serializable]
[XmlRoot("RewriteRule")]
public class Url
{
[XmlElement("From")]
public string From { get; set; }
[XmlElement("To")]
public string To { get; set; }
[XmlElement("Type")]
public string StatusCode { get; set; }
public Url()
{
}
public Url(Url url)
{
url.From = this.From;
url.To = this.To;
url.StatusCode = this.StatusCode;
}
}
谁能看到我在这里做错了什么?
由于
答案 0 :(得分:4)
我对from select
声明并不太熟悉,但您似乎只是传递了xml
,这是整个XDocument
,而不是XElement
你的RewriteRule
。这就是为什么您收到RewriteRules
未知的错误消息 - XmlSerializer
需要一个RewriteRule
。
我设法使用LINQ
重写您的代码(但如果您知道如何从from select
语句中获取单个元素,那么它应该同样有效。)
这可以为您提供正确的结果 - rr
是从XElement
返回的Descendants
:
public static IEnumerable<Url> GetRewriteXML()
{
XDocument xml = XDocument.Load(HttpContext.Current.Server.MapPath(fileName));
var xmlSerializer = new XmlSerializer(typeof(Url));
var nodes = xml.Descendants("RewriteRule")
.Select(rr => xmlSerializer.Deserialize(rr.CreateReader()) as Url);
return nodes;
}
答案 1 :(得分:3)
修改强> 您的Url类的名称不匹配。您需要将其重命名为“RewriteRule”或以这种方式定义:
[Serializable]
[System.Xml.Serialization.XmlRoot("RewriteRule")]
public class Url
{
[XmlElement("From")]
public string From { get; set; }
[XmlElement("To")]
public string To { get; set; }
[XmlElement("Type")]
public string StatusCode { get; set; }
public Url()
{
}
public Url(Url url)
{
url.From = this.From;
url.To = this.To;
url.StatusCode = this.StatusCode;
}
}
答案 2 :(得分:1)
当你将它直接反序列化为类的实例时,我的方法会被更多地使用。
如果你想使用XDocument,你可以像这样写。我不在我的代码中使用XDocument。因为我需要反序列化完整的xml包,所以我直接使用根节点的反序列化。因此,我已经建议将根节点放在上一篇文章的正确位置。
使用XDocument,您可以直接访问子部分。这是适用于您的目的的工作代码,但可能有其他人可以帮助您更优雅地设置此代码:
public static UrlCollection GetRewriteXML(string fileName)
{
XDocument xml = XDocument.Load(HttpContext.Current.Server.MapPath(fileName));
var urls = from s in xml.Descendants("RewriteRule")
select new
{
From = (string)s.Element("From").Value,
To = (string)s.Element("To").Value,
StatusCode = (string)s.Element("Type").Value
};
UrlCollection nodes = new UrlCollection();
foreach (var url in urls)
{
nodes.Add(new Url(url.From, url.To, url.StatusCode));
}
return nodes;
}
[Serializable]
public class Url
{
[XmlElement("From")]
public string From { get; set; }
[XmlElement("To")]
public string To { get; set; }
[XmlElement("Type")]
public string StatusCode { get; set; }
public Url()
{
}
public Url(string From, string To, string StatusCode)
{
this.From = From;
this.To = To;
this.StatusCode = StatusCode;
}
public Url(Url url)
{
url.From = this.From;
url.To = this.To;
url.StatusCode = this.StatusCode;
}
}