DataTable/集合 转 Json

前端用的jqueryUI框架获取json格式数据绑定显示表格。

后端通过WebService获取的数据是DataTable。

现将获取DataTable转Json，也支持将数据集合转Json。

一。项目中引用：Newtonsoft.Json

二。功能代码，很简单：

using System;
using System.Data;

namespace WebApplication1.Common
{
public class DataTableToModel
{

public static DataTable GetData()
{
　　DataTable dt = new DataTable();
　　dt.Columns.Add("UserId", typeof(Int32));
　　dt.Columns.Add("UserName", typeof(string));
　　dt.Columns.Add("Education", typeof(string));
　　dt.Columns.Add("Location", typeof(string));
　　dt.Rows.Add(1, "Satinder Singh", "Bsc Com Sci", "Mumbai");
　　dt.Rows.Add(2, "Amit Sarna", "Mstr Com Sci", "Mumbai");
　　dt.Rows.Add(3, "Andrea Ely", "Bsc Bio-Chemistry", "Queensland");
　　dt.Rows.Add(4, "Leslie Mac", "MSC", "Town-ville");
　　dt.Rows.Add(5, "Vaibhav Adhyapak", "MBA", "New Delhi");
　　return dt;
}

/// <summary>
/// 用于视图层数据表绑定信息
/// </summary>
/// <typeparam name="T"></typeparam>
public class ViewBaseModel<T> where T : class
{
　　public int total { get; set; }
　　public int page { get; set; }
　　public int records { get; set; }
　　public T rows { get; set; }
}

/// <summary>
/// 将DataTable中指定列数据 转 Json
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="dataList"></param>
/// <param name="columnNames"></param>
/// <returns></returns>
public static string Convert<T>(ViewBaseModel<T> dataList) where T :class {
　　return Newtonsoft.Json.JsonConvert.SerializeObject(dataList);
}

/// <summary>
/// 将DataTable中指定列数据 转 Json
/// </summary>
/// <param name="total">总页数</param>
/// <param name="page">指定页序号，起始为1</param>
/// <param name="records">数据总数</param>
/// <param name="dTable">数据集合</param>
/// <param name="columnNames">显示DataTable中指定列</param>
/// <returns>返回json格式数据</returns>
public static string ConvertTable(int total, int page, int records, DataTable dTable, params string[] columnNames) {

　　if (dTable == null || dTable.Rows.Count <= 0)
　　{
　　return string.Empty;
　　}

　　if (columnNames != null && columnNames.Length > 0)
　　{
　　dTable = dTable.DefaultView.ToTable(false, columnNames);
　　}

　　return ConvertCollection(total, page, records, dTable);
}

/// <summary>
/// 将数据集合 转 Json
/// </summary>
/// <typeparam name="T">指定类型集合</typeparam>
/// <param name="total">总页数</param>
/// <param name="page">指定页序号，起始为1</param>
/// <param name="records">数据总数</param>
/// <param name="dataCollection">类型集合对象</param>
/// <returns></returns>
public static string ConvertCollection<T>(int total, int page, int records, T dataCollection) where T:class
{
　　if (dataCollection == null)
　　{
　　　　return string.Empty;
　　}

　　var jsonModel = new ViewBaseModel<T>();
　　jsonModel.page = page;
　　jsonModel.records = records;
　　jsonModel.total = total;
　　jsonModel.rows = dataCollection;

　　return Newtonsoft.Json.JsonConvert.SerializeObject(jsonModel);
　　}
}
}

三。外部调用：

1.

DataTable dtable = Common.DataTableToModel.GetData();
if (dtable == null || dtable.Rows.Count <= 0)
{
return View();
}

DataTable newTable = dtable.DefaultView.ToTable(false, "UserName");
var jsonModel = new Common.DataTableToModel.ViewBaseModel<DataTable>();
jsonModel.page = 1;
jsonModel.records = 1200;
jsonModel.total = 100;
jsonModel.rows = newTable;

ViewBag.Data = Common.DataTableToModel.Convert(jsonModel);

2.

　　ViewBag.Data = Common.DataTableToModel.ConvertTable(1, 1, 1, Common.DataTableToModel.GetData());

3.

public class dataRows {
　　public int sid { get; set; }
　　public string uname { get; set; }
　　public DateTime addTime { get; set; }
}

var drList = new List<dataRows> {
　　new dataRows() { addTime=DateTime.Now, sid=1, uname="test111"},
　　new dataRows() { addTime=DateTime.Now, sid=2, uname="test222"},
　　new dataRows() { addTime=DateTime.Now, sid=3, uname="test333"}
};

ViewBag.Data = Common.DataTableToModel.ConvertCollection<List<dataRows>>(1, 1, 1,drList);

原文：http://www.cnblogs.com/shouwu/p/5093488.html