将DataTable或Ilist<>转换成JSON格式

using System;

using System.Data;

using System.Text;

using System.Collections.Generic;

using System.Reflection;



/// <summary>

/// 将DataTable或Ilist<>转换成JSON格式

/// </summary>

public class ToJson

{

    public ToJson()

    {



    }



//DataTable转成Json

    public static string DataTableToJson(string jsonName, DataTable dt)

    {

        StringBuilder Json = new StringBuilder();

        Json.Append("{\"" + jsonName + "\":[");

        if (dt.Rows.Count > 0)

        {

            for (int i = 0; i < dt.Rows.Count; i++)

            {

                Json.Append("{");

                for (int j = 0; j < dt.Columns.Count; j++)

                {

                    Json.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":\"" + dt.Rows[i][j].ToString() + "\"");

                    if (j < dt.Columns.Count - 1)

                    {

                        Json.Append(",");

                    }

                }

                Json.Append("}");

                if (i < dt.Rows.Count - 1)

                {

                    Json.Append(",");

                }

            }

        }

        Json.Append("]}");

        return Json.ToString();

    }



//List转成json

    public static string ObjectToJson<T>(string jsonName, IList<T> IL)

    {

        StringBuilder Json = new StringBuilder();

        Json.Append("{\"" + jsonName + "\":[");

        if (IL.Count > 0)

        {

            for (int i = 0; i < IL.Count; i++)

            {

                T obj = Activator.CreateInstance<T>();

                Type type = obj.GetType();

                PropertyInfo[] pis = type.GetProperties();

                Json.Append("{");

                for (int j = 0; j < pis.Length; j++)

                {

                    Json.Append("\"" + pis[j].Name.ToString() + "\":\"" + pis[j].GetValue(IL[i], null) + "\"");

                    if (j < pis.Length - 1)

                    {

                        Json.Append(",");

                    }

                }

                Json.Append("}");

                if (i < IL.Count - 1)

                {

                    Json.Append(",");

                }

            }

        }

        Json.Append("]}");

        return Json.ToString();

    }

}