在C＃中将属性附加到序列化的json字符串

Question

我有一个要序列化的课程

public class DesignEntity
{
    public string DesignName { get; set; }
    public string DesignID { get; set; }
    [ScriptIgnore]
    public string designDetails { get; set; }
}

属性designDetails已经包含序列化的数据，因此无需再次对其进行序列化

DesignEntity designSessionEntity = null;
JavaScriptSerializer jSerializer = null;
string designJsonSession = "null";

designSessionEntity = new DesignEntity();
jSerializer = new JavaScriptSerializer();

designSessionEntity = /* */ // Get Values via some method
designJsonSession = jSerializer.Serialize(designSessionEntity); 
// Now append designDetails to resultant string json

我想追加designDetails到designJsonSession序列完成后。 我怎样才能达到同样的目的？

Answer 1

首先，向您的DesignEntity类添加一个字段。 谁的类型是designDetails json序列化的合同类。

public class DesignEntity
{
    public string DesignName { get; set; }
    public string DesignID { get; set; }
    /// new field
    public DesignDetailsObject DesignDetails { get; set; }
    [ScriptIgnore]
    public string designDetails { get; set; }
}

然后，照常获取对象，首先将json反序列化到该新字段中，然后对其进行序列化。

var designSessionEntity = new DesignEntity();
var jSerializer = new JavaScriptSerializer();

designSessionEntity = /// Get Values via some method

/// assign the design details with deserialized object
designSessionEntity.DesignDetails = jSerializer.Deserialize<DesignDetailsObject>(designSessionEntity.designDetails);

/// serialize it again
var designJsonSession = jSerializer.Serialize(designSessionEntity); 

瞧！

更新

如果您没有访问designDetails json进行序列化的类，则有两个选择。

1. 尝试从json结构中推断出该类， DesignDetailsObject自己创建DesignDetailsObject （推荐）。
2. 手动附加json字符串（我将尝试向您展示是否需要）-如果该类确实很繁琐，则不值得使用此方法。

代码段对于选项2：

public string JsonAppender ( string targetJson, List<string> fields, object value )
{
    var insertIndex = 0;
    foreach ( var field in fields )
    {
        var _fieldDescriptor = field + "\":";
        insertIndex += targetJson.Substring(insertIndex).IndexOf(_fieldDescriptor) + _fieldDescriptor.Length;
    }

    var lengthOfDefaultVal = targetJson.Substring(insertIndex).IndexOf("\"") - 1;

    return targetJson.Substring(0, insertIndex) + "\"" + value + "\"" + targetJson.Substring(insertIndex + lengthOfDefaultVal);
}

用法：

var fieldAppendedJson = JsonAppender(json, new List<string> { "designDetails " }, designSessionEntity.designDetails);