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.net json 和 Datatable 相互转化

2017-04-11 00:33 344 查看

　/// <summary>
　　/// 页面加载时
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void Page_Load(object sender, EventArgs e)
{
//判断是否异步请求
if (Request.QueryString["ajax"] == "1")
{
ProcessRequest();
}
}

/// <summary>
/// 处理异步请求
/// </summary>
private void ProcessRequest()
{
Response.ContentType = "text/html";

string json = Request.Form["json"];
//反序列化DataTable
DataTable newdtb = Json2Dtb(json);

//序列化DataTable为JSON
string back = Dtb2Json(newdtb);
Response.Write(back);
Response.End();
}

/// <summary>
/// DataTable转Json
/// </summary>
/// <param name="dtb"></param>
/// <returns></returns>
private string Dtb2Json(DataTable dtb)
{
JavaScriptSerializer jss = new JavaScriptSerializer();
ArrayList dic = new ArrayList();

foreach (DataRow row in dtb.Rows)
{
Dictionary<string, object> drow = new Dictionary<string, object>();
foreach (DataColumn col in dtb.Columns)
{
drow.Add(col.ColumnName, row[col.ColumnName]);
}
dic.Add(drow);
}

return jss.Serialize(dic);
}

/// <summary>
/// Json转DataTable
/// </summary>
/// <param name="json"></param>
/// <returns></returns>
private DataTable Json2Dtb(string json)
{
JavaScriptSerializer jss = new JavaScriptSerializer();
ArrayList dic = jss.Deserialize<ArrayList>(json);
DataTable dtb = new DataTable();

if (dic.Count > 0)
{
foreach (Dictionary<string, object> drow in dic)
{
if (dtb.Columns.Count == 0)
{
foreach (string key in drow.Keys)
{
dtb.Columns.Add(key, drow[key].GetType());
}
}

DataRow row = dtb.NewRow();
foreach (string key in drow.Keys)
{

row[key] = drow[key];
}
dtb.Rows.Add(row);
}
}
return dtb;
}

前端页面

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>

<script type="text/javascript" src="js/jquery-1.4.2.min.js"></script>

<script type="text/javascript" src="js/json2.js"></script>

<script type="text/javascript">
//onload
$(function() {
//点击botton1
$("#botton1").click(function() {
var url = "default.aspx?ajax=1";
var dtb = generateDtb();
console.log(dtb);
//序列化对象
var postdata = JSON.stringify(dtb);
console.log(postdata);
//异步请求
$.post(url, { json: postdata }, function(json) {
createTable(json);
}, "json")

});
});

//生成DataTable对象
function generateDtb() {
var dtb = new Array();
for (var i = 0; i < 10; i++) {
var row = new Object();
row.col1 = i;
row.col2 = i % 2 == 0 ? true : false;
row.col3 = i + "he\nll\"ow";
dtb.push(row);
}
return dtb;
}

//显示Json中的数据
function createTable(json) {
var table = $("<table border='1'></table>");
for (var i = 0; i < json.length; i++) {
o1 = json[i];
var row = $("<tr></tr>");
for (key in o1) {
var td = $("<td></td>");
td.text(o1[key].toString());
td.appendTo(row);
}
row.appendTo(table);
}
table.appendTo($("#back"));
}

</script>

</head>
<body>
qqq
<form id="form1" runat="server">
<div>
<input id="botton1" type="button" value="button" />
<div id="back">
</div>
</div>
</form>
</body>
</html>

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