如何从类对象中获取JSON字符串

本文介绍了如何从类对象中获取JSON字符串的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我已经将静态从字符串更改为对象但没有成功。 输入mo，dy和yr存在。 我用一个字符串编写了一个工作类语句，包括：idd，datetime，col1，col2和col3。 如何获得一个类对象中的JSON字符串？ 错误代码：

I have changed the static from string to object with no success. The inputs mo, dy and yr exist. I have written a working class statement using a string including: idd, datetime, col1, col2 and col3. How do I get a JSON string out of a class object? Error Code:

[object Object]

Default.aspx.cs

Default.aspx.cs

public static string GetDate(string mo, string dy, string yr) { List<dataclass> returndata = new List<dataclass>(); dataclass dc = new dataclass(); var json = ""; string date1 = mo.ToString() + "/" + dy.ToString() + "/" + yr.ToString() + " 8:00 AM"; if (date1.Length > 6) { DataSet ds = new DataSet(); DataTable dt = new DataTable(); string connStr = ConfigurationManager.ConnectionStrings["jsonobject"].ConnectionString; string cmdStr = "SELECT * FROM [jsondata] WHERE [datetime1]=@datetime1;"; using (SqlConnection conn = new SqlConnection(connStr)) { using (SqlCommand cmd = new SqlCommand(cmdStr, conn)) { conn.Open(); cmd.Parameters.AddWithValue("@datetime1", date1); using (SqlDataAdapter da = new SqlDataAdapter(cmd)) { da.Fill(ds); dt = ds.Tables[0]; foreach (DataRow dr in dt.Rows) { dc.idd = dr["idd"].ToString(); dc.datetime = dr["datetime1"].ToString(); dc.col1 = dr["col1"].ToString(); dc.col2 = dr["col2"].ToString(); dc.col3 = dr["col3"].ToString(); returndata.Add(dc); } } } } System.Web.Script.Serialization.JavaScriptSerializer serializer = new System.Web.Script.Serialization.JavaScriptSerializer(); json = serializer.Serialize(returndata); } else { json = "mo,dy,yr were null"; } return json; }

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