Implement code using ajax pagination in jQuery_jquery

Function introduction: The main function is to display data in pages. The page number to be displayed on each page can be configured in the configuration file. Multi-condition joint queries can be made. Here is just a simple query. Welcome to make suggestions. If you have any questions, please correct me. Take a look at this rendering, it’s not refreshed! !

Please see the source code for specific implementation:

1. aspx page

Copy code The code is as follows:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="AjaxPage.aspx.cs" Inherits="MeasurementWellCurve.UI.AjaxPage" %>

Number:value="Query" />

< ;tr>


< th>
Wellbore storage constant C

Test number	Formation permeability K	Skin coefficient S	Clogging Ratio		Detection radius	Fitting formation pressure	Boundary distance	Pressure coefficient	Composite energy storage ratio	Operation

Totaldata[] pages/total[0]Page

Homepage Previous page Next page Last page

2. Specific implementation of JS

Copy code The code is as follows:

var pageIndex = 1; //Page index
var where = " where 1=1";
$(function() {
BindData();
// GetTotalCount (); //Total number of records
//GetPageCount(); //Total number of pages bound
//First page button click event
$("#first").click(function () {
pageIndex = 1;
$("#lblCurent").text(1);
BindData();
});
//Previous page button click event
$("#previous").click(function() {
if (pageIndex != 1) {
pageIndex--;
$("#lblCurent").text(pageIndex) ;
}
BindData();
});
//Next page button click event
$("#next").click(function() {
var pageCount = parseInt($("#lblPageCount").text());
if (pageIndex != pageCount) {
pageIndex ;
$("#lblCurent").text(pageIndex);
}
BindData();
});
//Last page button click event
$("#last").click(function() {
var pageCount = parseInt($("#lblPageCount").text());
pageIndex = pageCount;
BindData();
});
//Query
$("#btnSearch" ).click(function() {
where = " where 1=1";
var csbh = $("#txtCSBH").val();
if (csbh != null && csbh ! = NaN) {
pageIndex = 1;
where = " and csbh like '%" csbh "%'";
}
BindData();
});
} )
//The AJAX method obtains data and displays it on the page
function BindData() {
$.ajax({
type: "get", //Use the get method to access the background
dataType: "json", //Return data in json format
url: "../AjaxService/JgcsService.ashx", //Backend address to be accessed
data: { "pageIndex": pageIndex, "where ": where }, //Data to be sent
ajaxStart: function() { $("#load").show(); },
complete: function() { $("#load") .hide(); }, //Hide the loading prompt when the AJAX request is completed
success: function(msg) {//msg is the returned data, do data binding here
var data = msg.table;
if (data.length != 0) {
var t = document.getElementById("tb_body"); //Get the table displaying data
while (t.rows.length != 0) {
t.removeChild(t.rows[0]); //If the table already has rows when reading data. Always delete
}
}
$.each(data, function(i, item) {
$("#jgcsTable").append("" item .CSBH "" item.K " " item.C
" " item.S " < /td>" item.DSB " " item.TCBJ
"" item.LHDCYL " < td>" item.BJJL "" item.YLXS
" " item.FCTH " "
""id='btnInsert 'style='border-width:0px;' />");
})
},
error: function() {
var t = document.getElementById("tb_body"); //Get the table to display data
while (t.rows.length != 0) {
t.removeChild(t.rows[0 ]); //If the table already has rows when reading data. Always delete
}
alert("Loading data failed");
} //Loading failed, request error handling
//ajaxStop:$("#load").hide()
});
GetTotalCount();
GetPageCount();
bindPager();
}
// Footer attribute settings
function bindPager() {
/ /Fill distribution control information
var pageCount = parseInt($("#lblPageCount").text()); //Total number of pages
if (pageCount == 0) {
document.getElementById(" lblCurent").innerHTML = "0";
}
else {
if (pageIndex > pageCount) {
$("#lblCurent").text(1);
}
else {
$("#lblCurent").text(pageIndex); //Current page
}
}
document.getElementById("first").disabled = (pageIndex = = 1 || $("#lblCurent").text() == "0") ? true : false;
document.getElementById("previous").disabled = (pageIndex <= 1 || $( "#lblCurent").text() == "0") ? true : false;
document.getElementById("next").disabled = (pageIndex >= pageCount) ? true : false;
document .getElementById("last").disabled = (pageIndex == pageCount || $("#lblCurent").text() == "0") ? true : false;
}
//AJAX method Get the total number of pages
function GetPageCount() {
var pageCount;
$.ajax({
type: "get",
dataType: "text",
url: " ../AjaxService/JgcsService.ashx",
data: { "wherePageCount": where }, //"wherePageCount" where, I personally recommend not using this method
async: false,
success: function( msg) {
document.getElementById("lblPageCount").innerHTML = msg;
}
});
}
//AJAX method to get the total number of records
function GetTotalCount() {
var pageCount;
$.ajax({
type: "get",
dataType: "text",
url: "../AjaxService/JgcsService.ashx",
data: { "whereCount": where },
async: false,
success: function(msg) {
document.getElementById("lblToatl").innerHTML = msg;
}
});
}

3. Code in general handler ashx

Copy code The code is as follows:

public class JgcsService : IHttpHandler
{
readonly int pageSize = 15;
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/ plain";
//Do not let the browser cache
context.Response.Buffer = true;
context.Response.ExpiresAbsolute = DateTime.Now.AddDays(-1);
context.Response. AddHeader("pragma", "no-cache");
context.Response.AddHeader("cache-control", "");
context.Response.CacheControl = "no-cache";
string result = "";
//Total number of records
if (!string.IsNullOrEmpty(context.Request["whereCount"]))
{
string where = context.Request.Params ["whereCount"].ToString();
result = Jgcs.GetToatlNum(where).ToString();
}
//Total number of pages
if (!string.IsNullOrEmpty(context. Request["wherePageCount"]))
{
string where = context.Request.Params["wherePageCount"].ToString();
int count = Jgcs.GetToatlNum(where);
string pageCount = Math.Ceiling((double)count / (double)pageSize).ToString();
result = pageCount;
}
//Paging data
if (!string.IsNullOrEmpty(context .Request.Params["pageIndex"])
&& !string.IsNullOrEmpty(context.Request.Params["where"]))
{
string where = context.Request.Params["where" ].ToString();
int pageIndex = Convert.ToInt32(context.Request.Params["pageIndex"]);
result = GetJsonString(where, pageIndex);
}
context.Response .Write(result);
}
///

/// Return json string
///

/// Query conditions
/// Page index
/// json string< /returns>
protected string GetJsonString(string where, int pageIndex)
{
DataTable dt = Jgcs.GetInfo("csbh", where, pageIndex, pageSize);
return JsonHelper.DataTable2Json(dt , "table");
}
public bool IsReusable
{
get
{
return false;
}
}
}

4. You can read or leave the paging query method. You know how to do this. I will give you a simple example to start the process. Don’t write like this in terms of processing when applying. I only post it as a reference
Paging method

Copy code The code is as follows:

///

/// Paging query method
///

/// Sort field
/// Query conditions
/// Current page
/// Page size
///
public static DataTable GetInfo(string orderFile, string where, int pageNumber, int pageSize)
{
DBHelper db = new DBHelper();
string str = @"with TestInfo as
(
select row_number() over(order by {0} desc) as rowNumber,* from
( select CSBH,K,C,S,DSB,TCBJ,LHDCYL,BJJL,BJLX,YLXS,FCTH,KHM1,KHM2,QKCS from YW_JGCS) temp {1}
)
select * from TestInfo
where rowNumber between (({2}-1)*{3} 1) and {2}*{3}";
string strSql = string.Format(str, orderFile, where, pageNumber, pageSize);
try
{
db.DBOpen();
return db.DbDataSet(strSql);
}
catch (Exception ex)
{
throw ex;
}
finally
{
db.DBClose();
}
}
///

/// Total number of result parameters
///

///
///
public static int GetToatlNum(string where)
{
DBHelper db = new DBHelper();
string strSql = string.Format(@"select count(*) from (select CSBH,K,C,S,DSB, TCBJ,LHDCYL,BJJL,BJLX,YLXS,FCTH,KHM1,KHM2,QKCS from YW_JGCS) temp {0}", where);
try
{
db.DBOpen();
return (int)db.ExecuteScalar(strSql);
}
catch (Exception ex)
{
throw ex;
}
finally
{
db.DBClose ();
}
}

Okay, that’s all the code