关于(十六进制值 0x00)是无效的字符

       终于把自已恶搞一把，平时图省劲用山寨客户端向服务器提交数据，数据编码一直有问题。鄙人负责服务器的WCF接口开发，于是有一天测试WCF时填了自己的用户名，接下来报错

(十六进制值 0x00)是无效的字符 ，报应啊。

      我首先是把WCF返回的对象序列化一下，存入数据库。需要时反序列化，结果有些编码不对的对象在这时出了问题。百度了一些国内的解决方法，例如替换

'\0'或者写函数过滤，都解决不了问题。只能求助google中的英文资料了，结果是一很简单的事，用xmlTextReader把stringReader包装一下即可。

     总结，各类山寨客户端是测试的神器。好多错误信息抱的是中文错误，找不到中文资料时想法找到这个错误描述的英文原文，google之。

两种解决方法代码如下：

引用自http://baleinoid.com/whaly/2011/08/xml-deserialization-invalid-character/

Here is an example :

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public class MyObject { public string MyString { get ; set ; } } class Program { static void Main( string [] args) { XmlSerializerFactory fact = new XmlSerializerFactory(); XmlSerializer ser = fact.CreateSerializer( typeof (MyObject)); MyObject obj0 = new MyObject(); obj0.MyString = "Hello\0World" ; // Serialize the object StringWriter sw = new StringWriter(); ser.Serialize(sw, obj0); string xml = sw.ToString(); // We can check that in the xml a \0 is transformed in � Console.WriteLine(xml); // Classic use of XmlReader.Create StringReader sr1 = new StringReader(xml); XmlReader xr1 = XmlTextReader.Create(sr1); // xr1's type is XmlTextReaderImpl try { MyObject obj1 = (MyObject)ser.Deserialize(xr1); Console.WriteLine( "XmlReader [CheckCharacters({0})] : Success : {1}" , xr1.Settings.CheckCharacters, obj1.MyString); Console.WriteLine(obj1.MyString); } catch (Exception e) { Console.WriteLine( "XmlReader [CheckCharacters({0})] : Error : {1}" , xr1.Settings.CheckCharacters, e.InnerException); } // Using an XmlTextReader StringReader sr2 = new StringReader(xml); XmlTextReader xr2 = new XmlTextReader(sr2); // xr2.Settings is null MyObject obj2 = (MyObject)ser.Deserialize(xr2); Console.WriteLine( "XmlTextReader : Success : {0}" , obj2.MyString); // Using XmlReader with the good XmlReaderSettings StringReader sr3 = new StringReader(xml); XmlReaderSettings settings = new XmlReaderSettings(); settings.CheckCharacters = false ; // default value is true; XmlReader xr3 = XmlTextReader.Create(sr3, settings); // xr3.Settings.CheckCharacters is a read only and xr3's type is XmlTextReaderImpl MyObject obj3 = (MyObject)ser.Deserialize(xr3); Console.WriteLine( "XmlReader [CheckCharacters({0})] : Success : {1}" , xr3.Settings.CheckCharacters, obj3.MyString); } }