asp.Net+ajax単純ページングインスタンス分析

7955 ワード

本文の例はaspを述べた.Net+ajax単純ページング実装方法.皆さんの参考にしてください.具体的には以下の通りです.
ここには2つあります.aspxファイル、Defaultと申します.aspx、AjaxOperationsという名前です.aspxは、最初はいくつかのテストデータを表示し、次はページングを処理するために使用されます.jsフォルダの下にはtestJsもあります.jsのファイルです.ajax操作の核心部分です.いいですね.code is cheapです.コードを見てください:

/*testJs.js*/
//       document.getElementById /document.all
function $(s) { if (document.getElementById) { return eval('document.getElementById("' + s + '")'); } else { return eval('document.all.' + s); } }
//    XMLHttpRequest  ,   ajax   
function createXMLHTTP() {
 var xmlHttp = false;
 var arrSignatures = ["MSXML2.XMLHTTP.5.0", "MSXML2.XMLHTTP.4.0",
       "MSXML2.XMLHTTP.3.0", "MSXML2.XMLHTTP",
       "Microsoft.XMLHTTP"];
 for (var i = 0; i < arrSignatures.length; i++) {
  try {
   xmlHttp = new ActiveXObject(arrSignatures[i]);
   return xmlHttp;
  }
  catch (oError) {
   xmlHttp = false; //ignore
  }
 }
 // throw new Error("MSXML is not installed on your system."); 
 if (!xmlHttp && typeof XMLHttpRequest != 'undefined') {
  xmlHttp = new XMLHttpRequest();
 }
 return xmlHttp;
}
//window.onload = showPages(1, 10, 100);
//cP    , tP    ,tN     
function showPages(cP, tP, tN) {
 //          
 if (cP >= tP) {
  cP = tP;
 }
 //      1 
 if (cP < 1) {
  cP = 1;
 }
 var trPg = $("trPager");
 var newCellOne = trPg.insertCell(0);
 newCellOne.width = "20%";
 var newCellTwo = trPg.insertCell(1);
 newCellTwo.width = "15%";
 newCellTwo.id = "pgSummary";
 var newCellThree = trPg.insertCell(2);
 newCellThree.width = "45%";
 newCellThree.id = "pgNumContext";
 var newCellFour = trPg.insertCell(3)
 newCellFour.width = "20%";
 newCellTwo.innerHTML = " " + tN + "   " + cP + "/" + tP + " ";
 var pageHtml = " トップページ";
 pageHtml += " ページ";
 for (var i = 1; i < tP + 1; i++) {
  var numColor = "";
  if (i == 1) numColor = "red";
  pageHtml += "" + i + "";
 }
 pageHtml += " のページ";
 pageHtml += "  ページ";
 pageHtml += "  " +
   "";
 newCellThree.innerHTML = pageHtml;
}
//       js  ,                     
function forward() {
 if (!(/^([-]){0,1}([0-9]){1,}$/.test($("pgNumber").value))) {
  //        
  alert("        !");
  $("pgNumber").focus();
  $("pgNumber").select();
 }
 else
  gotoPage($("pgNumber").value);
}
//                
function handleEnterOnPgNumber() {
 if (event.keyCode == 13) {
  forward();
  return false;
 }
 return true;
}
function gotoPage(oNum) { //      0      (  ,  )
 if (oNum > 0) {
  var totalNumber = parseInt($("totalNum").innerText); //    
  var curPgNumber = parseInt($("cuPgNumber").innerText);
  var totalPgNumber = parseInt($("sumPgNumber").innerText); //    
  if (parseInt(oNum) <= totalPgNumber) {
   chgPages(oNum, totalPgNumber, totalNumber);
   for (var k = 1; k < totalPgNumber + 1; k++) {
    $("numPg" + k).style.color = "";
   }
   $("numPg" + oNum).style.color = "red";
   getPagerInfo(oNum);
  }
  else {
   alert("        !");
   $("pgNumber").focus();
   $("pgNumber").select();
   return;
  }
 }
}
function goToNextPrev(oNum) {
 var addNum = parseInt(oNum);
 var totalNumber = parseInt($("totalNum").innerText); //    
 var curPgNumber = parseInt($("cuPgNumber").innerText);
 var totalPgNumber = parseInt($("sumPgNumber").innerText); //    
 //         ,          //          ,         
 if ((curPgNumber + addNum) > 0 && (curPgNumber + addNum) <= totalPgNumber) {
  chgPages(parseInt(curPgNumber + addNum), totalPgNumber, totalNumber);
  for (var k = 1; k < totalPgNumber + 1; k++) {
   $("numPg" + k).style.color = "";
  }
  $("numPg" + parseInt(curPgNumber + addNum)).style.color = "red";
  getPagerInfo(parseInt(curPgNumber + addNum));
 }
}
function chgPages(cuPg, toPg, tNum) {
 // $("totalNum").innerHTML = tNum;
 $("cuPgNumber").innerHTML = cuPg;
 //$("sumPgNumber").innerHTML = toPg;
}
function getPagerInfo(oNum) { //     ,    
 var xmlReq = createXMLHTTP();
 xmlReq.open("post", "/AjaxOperations.aspx?pgNumber=" + oNum, true);
 xmlReq.onreadystatechange = function() {
  if (xmlReq.readyState == 4) {
   if (xmlReq.status == 200) {
    //xmlReq.responseText         
    $("tbTest").innerHTML = xmlReq.responseText;
   }
   else {
    $("tbTest").innerHTML = "       ,   ...";
    //alert("Connect the server failed!");
   }
  }
 }
 xmlReq.send(null);
}


Default.aspx:





 
 
 


 </code></pre> 1ページ<br>Default.aspx.cs: <pre><code>
using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebTest2008
{
 public partial class Default : System.Web.UI.Page
 {
  protected void Page_Load(object sender, EventArgs e)
  {
  }
 }
}

</code></pre>  <br>AjaxOperations.aspx:  <pre><code>
    
 </code></pre>  <br>AjaxOperations.aspx.cs: <pre><code>
using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebTest2008
{
 public partial class AjaxOperations : System.Web.UI.Page
 {
  protected void Page_Load(object sender, EventArgs e)
  {
   if (!string.IsNullOrEmpty(Request["pgNumber"]))
   {
    //int pgNum = Convert.ToInt32(Request["pgNumber"]);
    Response.Write(" " + Request["pgNumber"] + " ");
   }
  }
 }
}

</code></pre>  <br>Okは、 のマシン(vs 2008)でテストに  し、  なajaxページング  が  しました.<br>  で べたajaxプログラム  に  つことを っています.</disable_script></code></pre><div class="container-fluid p-0">

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