序列化为JSON以每行获取一个对象

Question

Is it possible to serialize object collection in a way that we get one JSON object per line? Like this:

{tag1: value1, tag2: value2}, 
{tag1: value3, tag2: value6}, 
{tag1: value4, tag2: value7}, 
{tag1: value5, tag2: value8}

As I know, I can serialize to have "pretty" and indented JSON or one-line JSON, which is not what I need.

Answer 1

It sounds like you want newline-delimited JSON . It's the same as what you have in your question but without the trailing commas.

You can make a simple helper method to create this format using Json.Net like this:

public static string Serialize(IEnumerable items)
{
    StringBuilder sb = new StringBuilder();
    foreach (var item in items)
    {
        sb.AppendLine(JsonConvert.SerializeObject(item));
    }
    return sb.ToString();
}

Better yet, just stream the items directly to your file:

public static void SerializeToFile(IEnumerable items, string fileName, bool append = true)
{
    using (StreamWriter sw = new StreamWriter(fileName, append))
    using (JsonWriter writer = new JsonTextWriter(sw))
    {
        var ser = new JsonSerializer();
        foreach (var item in items)
        {
            ser.Serialize(writer, item);
            writer.WriteWhitespace(Environment.NewLine);
        }
    }
}