格式化 Json

Question

我正在使用 Newtonsoft.Json

为此，我有以下代码，

    [WebMethod]
public static string GetData()
{
    string msg = string.Empty;
    string json;

    using (MySqlConnection con = new MySqlConnection("Server=localhost;Database=working_sample;uid=root;pwd=Tetra@123;pooling=false;"))
    {
        using (MySqlCommand cmd = new MySqlCommand("select * from json_example_table where subject='Swe'", con))
        {
            con.Open();
            cmd.ExecuteScalar();
            MySqlDataAdapter da = new MySqlDataAdapter(cmd);
            DataSet ds = new DataSet();
            da.Fill(ds);

            json = JsonConvert.SerializeObject(ds.Tables[0]); 
            // Using this I am getting single letter as output 
             // IN ASPX Code is as below.....
             success: function (data) {
                var objdata = $.parseJSON(data.d);
                var obj = data.d;
                 $('#txtname').val(obj[0]); // This is giving "[" as output


     //var settings = new JsonSerializerSettings { Formatting = Formatting.Indented };
     //string jsonn = JsonConvert.SerializeObject(ds, Formatting.None, settings);
        con.Close();
        }
    }

    return json;
}

我现在该怎么做才能获得正确的输出... 我已经尝试过格式化，但它给出的错误是

错误

  ambiguous ref btwn System.Xml.Formatting and System.Json.Formatting

请帮忙

Answer 1

当您使用Newtonsoft.Json 时，请使用正确的命名空间。 Formatting 属于 Newtonsoft.Json 命名空间，参考 Documentation

尝试指定命名空间，如Newtonsoft.Json.Formatting

 using Newtonsoft.Json;

 .....
 .....
 .....
 var settings = new JsonSerializerSettings 
                  { Formatting = Newtonsoft.Json.Formatting.Indented };