ASP.NET使用EasyUI-DataGrid + ashx + JQuery Ajax：实现数据的增删查改，查询和分页！

转自：http://www.cnblogs.com/lt-style/p/3457399.html

数据表：

学生表：学生编号、姓名、性别、班级编号、年龄

班级表：班级编号、班级名称

开发过程：

1.下载EasyUI的开发包

2.引用相关文件：

<link href="/CSS/easyui.css" rel="stylesheet" type="text/css" />
<link href="/CSS/demo.css" rel="stylesheet" type="text/css" />
<link href="/CSS/icon.css" rel="stylesheet" type="text/css" />
<script src="/Packages/jquery-1.6.4.min.js" type="text/javascript"></script>
<script src="/Packages/jquery.easyui.min.js" type="text/javascript"></script>
<script src="/Packages/EditStuInfo.js" type="text/javascript"></script>
<script src="/Packages/easyui-lang-zh_CN.js" type="text/javascript"></script>

3.引用相关图片文件：





要注意的是Css文件中的图片路路径，如果是使用默认的路径，那么图片文件应该放在css所在文件的同级目录，如果是其它目录，则要修改css中的图片路径

4.建立表格、对话框、及按钮：

<!--Search Begin-->
根据班级查询学生信息：
<select id="classNum_Search"></select>  
<a href="#" class="easyui-linkbutton" onclick="searchStuByClassNum()">查询</a>
<br />
<!--Search End-->

<!--StuInfo_Table Begin-->
<table id="dg" title="学生信息管理" class="easyui-datagrid" style="width:700px;height:365px"
url="/ashx/StudentInfo.ashx?Action=Load"
toolbar="#toolbar" pagination="true"
rownumbers="true" fitColumns="true" singleSelect="true">
<thead>
<tr>
<th field="Id" width="50">ID</th>
<th field="StuNum" width="50">学生编号</th>
<th field="StuName" width="50">姓名</th>
<th field="ClasName" width="50">班级</th>
<th field="StuGender" width="50">性别</th>
<th field="StuAge" width="50">年龄</th>
</tr>
</thead>
</table>
<div id="toolbar">
<a href="javascript:void(0)" class="easyui-linkbutton" iconCls="icon-add" plain="true" onclick="newUser()">添加</a>
<a href="javascript:void(0)" class="easyui-linkbutton" iconCls="icon-edit" plain="true" onclick="editUser()">编辑</a>
<a href="javascript:void(0)" class="easyui-linkbutton" iconCls="icon-remove" plain="true" onclick="destroyUser()">删除</a>
</div>
<!--StuInfo_Table End-->

<!--StuInfo_Dialog Begin-->
<div id="dlg" class="easyui-dialog" style="width:400px;height:280px;padding:10px 20px"
closed="true" buttons="#dlg-buttons">
<div class="ftitle">学生信息</div>
<form id="fm" method="post" novalidate action="">
<div class="fitem">
<label>学生编号:</label>
<input name="StuNum" class="easyui-validatebox"/>
</div>
<div class="fitem">
<label>姓名:</label>
<input name="StuName" class="easyui-validatebox" required="true"/>
</div>
<div class="fitem">
<label>班级:</label>
<select name="ClassNum" id="ClassNum" ></select>
</div>
<div class="fitem">
<label>性别:</label>
<input id="rdoMan" name="StuGender" type="radio" value="1" />男
<input id="rdoWuman" name="StuGender" type="radio" value="0" />女
</div>
<div class="fitem">
<label>年龄:</label>
<input name="StuAge" class="easyui-validatebox" required="true" />
</div>
</form>
</div>
<!--StuInfo_Dialog End-->

<div id="dlg-buttons">
<a href="javascript:void(0)" class="easyui-linkbutton" iconCls="icon-ok" onclick="saveUser()">保存</a>
<a href="javascript:void(0)" class="easyui-linkbutton" iconCls="icon-cancel" onclick="javascript:$('#dlg').dialog('close')">取消</a>
</div>
</div>

5.对数据操作的JS代码：

var url;

//添加
function newUser() {
$('#dlg').dialog('open').dialog('setTitle', '添加学生信息');
$('#fm').form('clear');

//获取最大的学生ID并加1
$.get("/ashx/StudentInfo.ashx?Action=GetMaxNum", function (data) {
$("#fm input[name='StuNum']").val(data).attr("readonly", "readonly");
});

//获取班级信息
$.get("/ashx/StudentInfo.ashx?Action=GetClassInfo", function (data) {
$("#ClassNum").html("").append(data);
$("#ClassNum").eq(0).attr("selected", "selected");
});

//默认性别男被选中
$("#fm input[name='StuGender']").eq(0).attr("checked", "checked");

url = '/ashx/StudentInfo.ashx?Action=Save';
}

//更新
function editUser() {
var row = $('#dg').datagrid('getSelected');
if (row) {
$('#dlg').dialog('open').dialog('setTitle', '编辑学生信息');
$('#fm').form('load', row);

//获取和设置班级的状态
$.get("/ashx/StudentInfo.ashx?Action=GetClassInfo", function (data) {
$("#ClassNum").html("").append(data);
$("#ClassNum option").each(function () {
if ($(this).text() == row.ClasName) {
$(this).attr("selected", "selected");
}
});

//.eq(0).attr("selected", "selected");
});

//获取和设置性别的选中状态
if (row.StuGender == "男") {
$("#fm input[name='StuGender']").eq(0).attr("checked", "checked");
}
else {
$("#fm input[name='StuGender']").eq(1).attr("checked", "checked");
}
url = '/ashx/StudentInfo.ashx?Action=Update&id=' + row.Id;

}
}

//保存
function saveUser() {
$('#fm').form('submit', {
url: url,
onSubmit: function () {
return $(this).form('validate');
},
success: function (result) {
if (result == "False") {
$.messager.show({
title: '友情提示',
msg: 'Sorry, 出错了,请重试 :('
});
} else {
$('#dlg').dialog('close');        // close the dialog
$('#dg').datagrid('reload');    // reload the user data
}
}
});
}

//删除
function destroyUser() {
var row = $('#dg').datagrid('getSelected');
if (row) {
$.messager.confirm('友情提示', '确定要删除数据吗，删除后将无法找回?', function (r) {
if (r) {
$.post('/ashx/StudentInfo.ashx', { "Action": "Delete", "id": row.Id }, function (result) {
if (result == "True") {
$('#dg').datagrid('reload');    // reload the user data
} else {
$.messager.show({    // show error message
title: '错误提示！',
msg: "服务器错误，请刷新重试 :("
});
}
});
}
});
}
}

//根据班级查询学生信息
function searchStuByClassNum() {
var classNum = $("#classNum_Search").val();
$('#dg').datagrid({
url: "/ashx/StudentInfo.ashx?Action=SearchStu",
queryParams: { "classNum": classNum }
})
};

//加载班级信息到查询列表中
$(function () {
$.get("/ashx/StudentInfo.ashx?Action=GetClassInfo", function (data) {
$("#classNum_Search").html("").append(data);
$("#classNum_Search option").eq(0).attr("selected", "selected");
});
})

6.后台数据处理文件 ashx

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Configuration;
using System.Text;

namespace TestStuMS.Ashx
{
/// <summary>
/// StudentInfo 的摘要说明
/// </summary>
public class StudentInfo : IHttpHandler
{
public BLL.Students bllStu = new BLL.Students();
public BLL.StuClass bllClass = new BLL.StuClass();

public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";

//获取请求的动作
string action = context.Request["Action"];
if (string.IsNullOrEmpty(action)) return;

switch (action)
{
case "Save"://添加
context.Response.Write(AddStuInfo(context));
break;
case "Delete"://删除
context.Response.Write(DeleteStuInfo(context));
break;
case "Update"://更新
context.Response.Write(UpdateStuInfo(context));
break;
case "Load"://加载与分页
context.Response.Write(BuildPager(context));
break;
case "GetMaxNum"://获取新学生编号
context.Response.Write(GetMaxNum()+1);
break;
case "GetClassInfo"://获取班级信息
context.Response.Write(GetClassInfo(context));
break;
case "SearchStu"://根据班级获取学生信息
context.Response.Write(GetStuInfoByClassNum(context));
break;
}

}

#region 方法

//添加
private bool AddStuInfo(HttpContext context)
{
//stuNum:1201009
//stuName:星期三
//classNum:1201
//stuGender:男
//stuAge:20

Model.Students model= new Model.Students();
model.StuNum = int.Parse(context.Request["StuNum"]);
model.ClassNum = int.Parse(context.Request["ClassNum"]);
model.StuName = context.Request["StuName"];
model.StuGender = context.Request["StuGender"]=="1"?true:false;
model.StuAge = int.Parse(context.Request["StuAge"]);

return bllStu.Add(model);//如果是成功则返回True否则返回False
}

//更新
private bool UpdateStuInfo(HttpContext context)
{
Model.Students model = new Model.Students();
model.Id = int.Parse(context.Request["id"]);
model.StuNum = int.Parse(context.Request["StuNum"]);
model.ClassNum = int.Parse(context.Request["ClassNum"]);
model.StuName = context.Request["StuName"];
model.StuGender = context.Request["StuGender"] == "1" ? true : false;
model.StuAge = int.Parse(context.Request["StuAge"]);

return bllStu.Update(model);
}

//删除
private bool DeleteStuInfo(HttpContext context)
{
int Id = int.Parse(context.Request["id"]);
return bllStu.Delete(Id);
}

//分页
private string BuildPager(HttpContext context)
{
int pageIndex = int.Parse(context.Request["page"]);
int pageSize = int.Parse(context.Request["rows"]);

List<Model.Students> stuList = bllStu.GetModelList("");
List<Model.StuClass> classList = bllClass.GetModelList("");

//获取学生信息
var stuInfo = stuList.Join(classList,
s => s.ClassNum,
c => c.ClassNum,
(s, c) => new { s.Id, s.StuNum, s.StuName, c.ClasName, StuGender = s.StuGender == true ? "男" : "女", s.StuAge }
);

//查询分页数据
var pageData = stuInfo.Where(s => s.Id > 0)
.OrderByDescending(s => s.Id)
.Skip((pageIndex-1) * pageSize)
.Take(pageSize).ToList();

var data = new { total = stuInfo.Count(), rows = pageData };

//序列化成JSON格式数据
System.Web.Script.Serialization.JavaScriptSerializer jss = new System.Web.Script.Serialization.JavaScriptSerializer();

return jss.Serialize(data);

}

//获取班级信息
private string GetClassInfo(HttpContext context)
{
List< Model.StuClass> classList =  bllClass.GetModelList("");
StringBuilder sb = new StringBuilder();

foreach (var stuClass in classList)
{
sb.Append("<option value='" + stuClass.ClassNum + "'>" + stuClass.ClasName + "</option>");
}

return sb.ToString();
}

//获取学生最大ID(以便新添加的ID保持唯一)
private int GetMaxNum()
{
return bllStu.GetMaxStuNum();
}

//根据班级获取学生信息
private string GetStuInfoByClassNum(HttpContext context)
{
int classNum = int.Parse(context.Request["classNum"]);

List<Model.Students> stuList = bllStu.GetModelList("ClassNum=" + classNum);
List<Model.StuClass> classList = bllClass.GetModelList("");

//根据班级获取学生信息
var stuInfo = stuList.Join(classList,
s => s.ClassNum,
c => c.ClassNum,
(s, c) => new {s.ClassNum, s.Id, s.StuNum, s.StuName, c.ClasName, StuGender = s.StuGender == true ? "男" : "女", s.StuAge }
).Where(i=>i.ClassNum==classNum);

//序列化成JSON格式数据
System.Web.Script.Serialization.JavaScriptSerializer jss = new System.Web.Script.Serialization.JavaScriptSerializer();

return jss.Serialize(stuInfo.ToList());

}

#endregion

public bool IsReusable
{
get
{
return false;
}
}
}
}

7.效果图：