複雜類型的SOAP序列化時發生InvalidOperationException異常

我遇到了SOAP序列化的問題，找到答案會很好。這裏是一個非常簡化的例子：複雜類型的SOAP序列化時發生InvalidOperationException異常

public void Test() 
{ 
    StringBuilder sb = new StringBuilder(); 
    StringWriter writer = new StringWriter(sb); 

    SoapReflectionImporter importer = new SoapReflectionImporter(); 
    XmlTypeMapping map = importer.ImportTypeMapping(typeof(A)); 
    XmlSerializer serializer = new XmlSerializer(map); 
    serializer.Serialize(writer, new A()); 
} 

[Serializable] 
public class A 
{ 
    public A() 
    { 
     BB = new B(); 
    } 

    public int a; 

    public B BB; 
} 
[Serializable] 
public class B 
{ 
    public int A1 { get; set; } 

    public int A2 { get; set; } 
}

如果我跑法測試（），然後我得到以下異常：System.InvalidOperationException: Token StartElement in state Epilog would result in an invalid XML document.

希望得到任何幫助。

來源

2009-06-18 Dmitry Lobanov

使用XmlWriter代替StringWriter並執行writer.WriteStartElement（「root」）;

這將工作：

Stream s = new MemoryStream(); 
XmlWriter writer = new XmlTextWriter(s, Encoding.UTF8); 

SoapReflectionImporter importer = new SoapReflectionImporter(); 
XmlTypeMapping map = importer.ImportTypeMapping(typeof(A)); 
XmlSerializer serializer = new XmlSerializer(map); 
writer.WriteStartElement("root"); 
serializer.Serialize(writer, new A()); 

StreamReader sr = new StreamReader(s); 
string data = sr.ReadToEnd();

來源

2009-06-18 09:38:29

謝謝，這有助於。但是我還有另外一個問題，這次是去分解。如果我重寫類A中的方法GetHashCode（）並嘗試訪問屬性BB，則在反序列化期間會出現NullReferenceException。不知何故屬性BB等於0，但它不應該。 – 2009-06-18 09:58:01

你可以發佈你的反序列化代碼嗎？我會看看 – 2009-06-18 12:09:55

剛一說明，如果流的位置未設定爲數據流的開始上方的例子將無法正常工作。像這樣：

Stream s = new MemoryStream(); 
XmlWriter writer = new XmlTextWriter(s, Encoding.UTF8); 

SoapReflectionImporter importer = new SoapReflectionImporter(); 
XmlTypeMapping map = importer.ImportTypeMapping(typeof(A)); 
XmlSerializer serializer = new XmlSerializer(map); 
writer.WriteStartElement("root"); 
serializer.Serialize(writer, new A()); 

s.Position = 0; 
StreamReader sr = new StreamReader(s); 
string data = sr.ReadToEnd();

來源

2010-08-31 10:46:23

複雜類型的SOAP序列化時發生InvalidOperationException異常

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