在C＃中將屬性附加到序列化的json字符串

Question

我有一個要序列化的課程

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

屬性designDetails已經包含序列化的數據，因此無需再次對其進行序列化

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。 我怎樣才能達到同樣的目的？

Answer 1

首先，向您的DesignEntity類添加一個字段。 誰的類型是designDetails json序列化的合同類。

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，照常獲取對象，首先將json反序列化到該新字段中，然后對其進行序列化。

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

如果您沒有訪問designDetails json進行序列化的類，則有兩個選擇。

1. 嘗試從json結構中推斷出該類， DesignDetailsObject自己創建DesignDetailsObject （推薦）。
2. 手動附加json字符串（我將嘗試向您展示是否需要）-如果該類確實很繁瑣，則不值得使用此方法。

代碼段對於選項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);