【发布时间】：2011-05-08 19:50:45
【问题描述】：
我必须先将 xml 文件反序列化为 List，然后放大此列表并通过添加 1 个对象来序列化所有文件（为此需要放大）
来自 XML 的代码：
<?xml version="1.0"?>
<Person xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<name>Danie</name>
<lastName>McJackie</lastName>
<age>27</age>
</Person>
.cs 文件中的代码：我注释了出错的地方并复制了错误消息
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Xml;
using System.IO;
using System.Xml.Serialization;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
private List<Person> Deserialize(string path)
{
using (FileStream fs = new FileStream(path, FileMode.Open))
{
XmlSerializer ser = new XmlSerializer(typeof(List<Person>));
return (List<Person>)ser.Deserialize(fs);
//There is an error in XML document (2, 2).
// I got this error and don't know how to manage with it.
}
}
protected void Button1_Click(object sender, EventArgs e)
{
string path = Server.MapPath(Request.ApplicationPath + "/test.xml");
List<Person> people = File.Exists(path) ? Deserialize(path) :new List<Person>();
people.Add(new Person(TextBox1.Text, TextBox2.Text, int.Parse(TextBox3.Text)));
using (FileStream fs = File.OpenWrite(path))
{
XmlSerializer ser = new XmlSerializer(typeof(List<Person>));
ser.Serialize(fs, people);
}
}
}
至少要序列化的类：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
[Serializable]
public class Person
{
public string name;
public string lastName;
public int age;
public Person(string _name, string _lastName, int _age)
{
name = _name;
lastName = _lastName;
age = _age;
}
public Person()
{
}
}
异常详情：
System.InvalidOperationException was unhandled by user code
Message=There is an error in XML document (2, 2).
Source=System.Xml
StackTrace:
at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events)
at System.Xml.Serialization.XmlSerializer.Deserialize(Stream stream)
at _Default.Deserialize(String path) in e:\Programy c#\WebSites\ASP8\Default.aspx.cs:line 22
at _Default.Button1_Click(Object sender, EventArgs e) in e:\Programy c#\WebSites\ASP8\Default.aspx.cs:line 29
at System.Web.UI.WebControls.Button.OnClick(EventArgs e)
at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument)
at System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
InnerException: System.InvalidOperationException
Message=<Person xmlns=''> was not expected.
Source=_1r-cm1p
StackTrace:
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderList1.Read3_ArrayOfPerson()
InnerException:
这是我上次编辑时添加的内容
反序列化文件.cs：
string path = Server.MapPath(Request.ApplicationPath + "/test.xml");
using (FileStream fs = new FileStream(path, FileMode.Open))
{
XmlSerializer ser = new XmlSerializer(typeof(List<Person>));
List<Person> os = (List<Person>)ser.Deserialize(fs);
foreach (var i in os)
{
Label1.Text += i.Name + "<hr />" + i.LastName + "<hr />" + i.Age.ToString() + "<hr />";
}
fs.Close();
一切正常，感谢大家的帮助:)
【问题讨论】：
-
错误是什么？异常详情？
-
只是一个助手 - 稍微改变你的命名约定 _name 应该是你的私有成员，你的公共字符串名称应该是公共字符串名称（注意大写）
-
2,2 处的错误几乎总是意味着文件开头的回车 - 是这种情况吗？
标签： c# asp.net xml-serialization