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//翻页调用
function pagecallback(index, jq) {
inittable(index);
}
//请求数据
function inittable(pageindex) {
$.ajax({
type: "post",
datatype: "json",
url: 'supplyajax.aspx', //提交到一般处理程序请求数据
data: "type=show&random=" + math.random() + "&pageindex=" + (pageindex + 1) + "&pagesize=" + pagesize, //提交两个参数：pageindex(页面索引)，pagesize(显示条数)
error: function () { alert('error data'); }, //错误执行方法
success: function (data) {
$("#result tr:gt(0)").remove(); //移除id为result的表格里的行，从第二行开始（这里根据页面布局不同页变）
var json = data; //数组
var html = "";
$.each(json.data, function (index, item) {
//循环获取数据
var id = item.id;
var name = item.name;
var sex = item.sex;
html += "<tr><td>" + id + "</td><td>" + name + "</td><td>" + sex + "</td></tr>";
});
$("#result").append(html); //将返回的数据追加到表格
}
});
}
});
</script>
</head>
<body>
<form id="form1" runat="server">
<table id="result" cellspacing="0" cellpadding="0">
<tr>
<th>
编号
</th>
<th>
姓名
</th>
<th>
性别
</th>
</tr>
</table>
<div id="pagination">
</div>
</form>
</body>
</html>
public partial class ajaxjson : system.web.ui.page
{
public string pagecount = string.empty; //总条目数
protected void page_load(object sender, eventargs e)
{
if (!ispostback)
{
string url = "/supplyajax.aspx";
string strresult = getrequestjsonstring(url, "type=getcount");
pagecount = strresult.tostring();
}
}
#region 后台获取ashx返回的数据
/// <summary>
/// 后台获取ashx返回的数据
/// </summary>
/// <param name="relativepath">地址</param>
/// <param name="data">参数</param>
/// <returns></returns>
public static string getrequestjsonstring(string relativepath, string data)
{
string requesturl = getrequesturl(relativepath, data);
try
{
webrequest request = webrequest.create(requesturl);
request.method = "get";
streamreader jsonstream = new streamreader(request.getresponse().getresponsestream());
string jsonobject = jsonstream.readtoend();
return jsonobject;
}
catch
{
return string.empty;
}
}
public static string getrequesturl(string relativepath, string data)
{
string absolutepath = httpcontext.current.request.url.absoluteuri;
string hostnameandport = httpcontext.current.request.url.authority;
string applicationdir = httpcontext.current.request.applicationpath;
stringbuilder sbrequesturl = new stringbuilder();
sbrequesturl.append(absolutepath.substring(0, absolutepath.indexof(hostnameandport)));
sbrequesturl.append(hostnameandport);
sbrequesturl.append(applicationdir);
sbrequesturl.append(relativepath);
if (!string.isnullorempty(data))
{
sbrequesturl.append("?");
sbrequesturl.append(data);
}
return sbrequesturl.tostring();
}
#endregion
}
public partial class supplyajax : system.web.ui.page
{
protected static list<student> studentlist = new list<student>();
protected static int recordcount = 0;
protected static datatable dt = createdt();
protected void page_load(object sender, eventargs e)
{
switch (request["type"])
{
case "show":
#region 分页配置
//具体的页面数
int pageindex;
int.tryparse(request["pageindex"], out pageindex);
//页面显示条数
int pagesize = convert.toint32(request["pagesize"]);
if (pageindex == 0)
{
pageindex = 1;
}
#endregion
datatable pageddt = getpagedtable(dt, pageindex, pagesize);
list<student> list = new list<student>();
foreach (datarow dr in pageddt.rows)
{
student c = new student();
c.id = (int32)dr["id"];
c.name = dr["name"].tostring();
c.sex = dr["sex"].tostring();
list.add(c);
}
string json = new javascriptserializer().serialize(list);//这个很关键，否则error
stringbuilder builder = new stringbuilder();
builder.append("{");
builder.append("\"recordcount\":" + recordcount + ",");
builder.append("\"data\":");
builder.append(json);
builder.append("}");
response.contenttype = "application/json";
response.write(builder.tostring());
break;
case "getcount":
response.write(dt.rows.count);
break;
case "add":
break;
case "update":
break;
case "delete":
break;
}
response.end();
}
#region 模拟数据
private static datatable createdt()
{
datatable dt = new datatable();
dt.columns.add(new datacolumn("id", typeof(int)) { defaultvalue = 0 });
dt.columns.add(new datacolumn("name", typeof(string)) { defaultvalue = "1" });
dt.columns.add(new datacolumn("sex", typeof(string)) { defaultvalue = "男" });
for (int i = 1; i <= 1000; i++)
{
dt.rows.add(i, "张三" + i.tostring().padleft(4, '0'));
}
recordcount = dt.rows.count;
return dt;
}
#endregion
/// <summary>
/// 对datatable进行分页,起始页为1
/// </summary>
/// <param name="dt"></param>
/// <param name="pageindex"></param>
/// <param name="pagesize"></param>
/// <returns></returns>
public static datatable getpagedtable(datatable dt, int pageindex, int pagesize)
{
if (pageindex == 0)
return dt;
datatable newdt = dt.copy();
newdt.clear();
int rowbegin = (pageindex - 1) * pagesize;
int rowend = pageindex * pagesize;
if (rowbegin >= dt.rows.count)
return newdt;
if (rowend > dt.rows.count)
rowend = dt.rows.count;
for (int i = rowbegin; i <= rowend - 1; i++)
{
datarow newdr = newdt.newrow();
datarow dr = dt.rows[i];
foreach (datacolumn column in dt.columns)
{
newdr[column.columnname] = dr[column.columnname];
}
newdt.rows.add(newdr);
}
return newdt;
}
/// <summary>
/// 获取总页数
/// </summary>
/// <param name="sumcount">结果集数量</param>
/// <param name="pagesize">页面数量</param>
/// <returns></returns>
public static int getpagecount(int sumcount, int pagesize)
{
int page = sumcount / pagesize;
if (sumcount % pagesize > 0)
{
page = page + 1;
}
return page;
}
public struct student
{
public int id;
public string name;
public string sex;
}
}
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