反序列化派生類型

我想我終於明白了XmlSerialization，但是我最後的方法讓我覺得它就像一個新手。我的意圖是創建一個序列化和反序列化某種配置的框架。所以我創建了一個配置類如下：反序列化派生類型

/// <summary> 
/// Application-wide configurations that determine how to transform the features. 
/// </summary> 
[XmlRoot(Namespace = "baseNS")] 
public class Config 
{ 
    /// <summary> 
    /// List of all configuration-settings of this application 
    /// </summary> 
    [System.Xml.Serialization.XmlElement("Setting")] 
    public List<Setting> Settings = new List<Setting>(); 
}

現在我需要某種配置，它定義了一個自定義設置列表。

/// <summary> 
/// Application-wide configurations that determine how to transform the features. 
/// </summary> 
[System.Xml.Serialization.XmlRoot("Config", Namespace = "baseNS")] 
[System.Xml.Serialization.XmlInclude(typeof(BW_Setting))] 
public class BW_Config : Config { 
    // nothing to add, only needed to include type BW_Setting 
} 


/// <summary> 
/// Provides settings for one single type of source-feature specified by the <see cref="CQLQuery"/>-property. Only one target-featureType is possible for every setting. 
/// However settings for different targetTypes may have the same source-type provided. 
/// </summary> 
[System.Xml.Serialization.XmlRoot("Setting", Namespace = "anotherNS")] 
public class BW_Setting : Setting { 
    // add and modify some attributes 
}

據我所知，我在基類（設置）上放置了XmlInclude屬性。因此設置和BW_Setting駐留在不同的程序集中，後者取決於前者我不能使用這種方法，因爲我會得到一個圓形引用。

這是實際的串行代碼：

XmlSerializer ser = new XmlSerializer(typeof(BW_Config)); 
BW_Config c = new BW_Config(); 
c.Settings.Add(new BW_Setting()); 
((BW_Setting)c.Settings[0]).CQLQuery = "test";

現在執行上面時，我得到錯誤"Type BW_Setting was not expected. Use XmlInclude..." 我可以更改自定義組件中的一切，但因此基地之一屬於框架我不能更改。你能幫我做序列化（和反序列化）嗎？

來源

2014-10-22 HimBromBeere

我終於得到它通過定義一些覆蓋工作：

// determine that the class BW_Setting overrides the elements within "Settings" 
XmlAttributeOverrides overrides = new XmlAttributeOverrides(); 
overrides.Add(
    typeof(Config), 
    "Settings", new XmlAttributes { 
     XmlElements = { 
      new XmlElementAttribute("Setting", typeof(BW_Setting)) } }); 
XmlSerializer ser = new XmlSerializer(typeof(Config), overrides);

這將產生以下輸出

<?xml version="1.0"?> 
<Config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="baseNS"> 
    <Setting id="0"> 
    <CQLQuery>test</CQLQuery> 
    </Setting> 
</Config>

只有不愉快的事情是，XML的標籤設置內的命名空間丟失。然而反序列化也是有效的，所以不那麼煩人。

來源

2014-10-22 11:24:18 HimBromBeere

反序列化派生類型

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