【原】EasyUI ComboGrid 集成分页、按键示例

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需求：

1、下拉框下拉时出现表格；

2、表格带分页功能；

3、可以使用向上键、向下键在表格中移动选择行数据；

4、可以使用回车键在表格中选中行数据；

5、在下拉框的文本框中输入内容，能查询表格；

6、下拉框的文本框的内容变化时，表格数据按分页设置显示

效果如下：

图1、

图2、

图3、

图4、

思路：

很简单，分拆为combo、datagrid、pagination三个组件分别操作，注意结合的操作就好。

在制作的过程中，比较头痛的是整合，大体上代码中都加了注释，有些情况大家自己试一下就明白为什么要那样做了，

比如：在分页的页改变事件中要设置表格的pageSize，是为了在文本框变化时，能强制表格按分页的pageSize显示数据。

代码：

1、html代码

<!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>
<title></title>
<link href="style/js/easyui/themes/metro-green/easyui.css" rel="stylesheet" type="text/css" />
<link href="style/js/easyui/themes/icon.css" rel="stylesheet" type="text/css" />
<script src="style/js/easyui/jquery.min.js" type="text/javascript"></script>
<script src="style/js/easyui/jquery.easyui.min.js" type="text/javascript"></script>
<script src="style/js/easyui/locale/easyui-lang-zh_CN.js" type="text/javascript"></script>
<script src="style/js/biz/comboGridBiz.js" type="text/javascript"></script>
</head>
<body>
<h3>EasyUI ComboGrid 集成分页示例</h3>
<div><input id="cg" style="width:150px" /><input type="text" id="txtGender" /></div>
<input type="hidden" id="hdKeyword" />
</body>
</html>

2、js代码

$(function () {
$('#cg').combogrid({
panelWidth: 400,
idField: 'PersonId', //ID字段
textField: 'PersonName', //显示的字段
url: "ashx/ComboGridHandler.ashx?action=search",
fitColumns: true,
striped: true,
editable: true,
pagination: true, //是否分页
rownumbers: true, //序号
collapsible: false, //是否可折叠的
fit: true, //自动大小
method: 'post',
columns: [[
{ field: 'PersonId', title: '用户编号', width: 80, hidden: true },
{ field: 'PersonName', title: '用户名称', width: 150 },
{ field: 'Gender', title: '用户性别', width: 150 }
]],
keyHandler: {
up: function () { //【向上键】押下处理
//取得选中行
var selected = $('#cg').combogrid('grid').datagrid('getSelected');
if (selected) {
//取得选中行的rowIndex
var index = $('#cg').combogrid('grid').datagrid('getRowIndex', selected);
//向上移动到第一行为止
if (index > 0) {
$('#cg').combogrid('grid').datagrid('selectRow', index - 1);
}
} else {
var rows = $('#cg').combogrid('grid').datagrid('getRows');
$('#cg').combogrid('grid').datagrid('selectRow', rows.length - 1);
}
},
down: function () { //【向下键】押下处理
//取得选中行
var selected = $('#cg').combogrid('grid').datagrid('getSelected');
if (selected) {
//取得选中行的rowIndex
var index = $('#cg').combogrid('grid').datagrid('getRowIndex', selected);
//向下移动到当页最后一行为止
if (index < $('#cg').combogrid('grid').datagrid('getData').rows.length - 1) {
$('#cg').combogrid('grid').datagrid('selectRow', index + 1);
}
} else {
$('#cg').combogrid('grid').datagrid('selectRow', 0);
}
},
enter: function () { //【回车键】押下处理
//设置【性别】文本框的内容为选中行的的性别字段内容
$('#txtGender').val($('#cg').combogrid('grid').datagrid('getSelected').Gender);
//选中后让下拉表格消失
$('#cg').combogrid('hidePanel');
},
query: function (keyword) { //【动态搜索】处理
//设置查询参数
var queryParams = $('#cg').combogrid("grid").datagrid('options').queryParams;
queryParams.keyword = keyword;
$('#cg').combogrid("grid").datagrid('options').queryParams = queryParams;
//重新加载
$('#cg').combogrid("grid").datagrid("reload"); $('#cg').combogrid("setValue", keyword);
//将查询条件存入隐藏域
$('#hdKeyword').val(keyword);
}
},
onSelect: function () { //选中处理
$('#txtGender').val($('#cg').combogrid('grid').datagrid('getSelected').Gender);
}
}); //取得分页组件对象
var pager = $('#cg').combogrid('grid').datagrid('getPager'); if (pager) {
$(pager).pagination({
pageSize: 10, //每页显示的记录条数，默认为10
pageList: [10, 5, 3], //可以设置每页记录条数的列表
beforePageText: '第', //页数文本框前显示的汉字
afterPageText: '页共 {pages} 页',
displayMsg: '当前显示 {from} - {to} 条记录共 {total} 条记录',
//选择页的处理
onSelectPage: function (pageNumber, pageSize) {
//按分页的设置取数据
getData(pageNumber, pageSize);
//设置表格的pageSize属性，表格变化时按分页组件设置的pageSize显示数据
$('#cg').combogrid("grid").datagrid('options').pageSize = pageSize;
//将隐藏域中存放的查询条件显示在combogrid的文本框中
$('#cg').combogrid("setValue", $('#hdKeyword').val());
$('#txtGender').val('');
},
//改变页显示条数的处理
//（处理后还是走onSelectPage事件，所以设置也写到onSelectPage事件中了）
onChangePageSize: function () { },
//点击刷新的处理
onRefresh: function (pageNumber, pageSize) {
//按分页的设置取数据
getData(pageNumber, pageSize);
//将隐藏域中存放的查询条件显示在combogrid的文本框中
$('#cg').combogrid("setValue", $('#hdKeyword').val());
$('#txtGender').val('');
}
});
} var getData = function (page, rows) {
$.ajax({
type: "POST",
url: "ashx/ComboGridHandler.ashx?action=search",
data: "page=" + page + "&rows=" + rows + "&keyword=" + $('#hdKeyword').val(),
error: function (XMLHttpRequest, textStatus, errorThrown) {
alert(textStatus);
$.messager.progress('close');
},
success: function (data) {
$('#cg').combogrid('grid').datagrid('loadData', data);
}
});
};
});

3、ashx代码

/// <summary>
/// ComboGridHandler 的摘要说明
/// </summary>
public class ComboGridHandler : IHttpHandler
{
/// <summary>
///
/// </summary>
/// <param name="context"></param>
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "application/json";
string action = context.Request.Params["action"]; //页数
int PageNum = Convert.ToInt32(context.Request["page"]);
//每一页多少条数据
int Record = Convert.ToInt32(context.Request["rows"]); //模拟数据
List<Person> list = MockData(); Dictionary<string, object> resultDic = new Dictionary<string, object>(); switch (action)
{
case "search": var condition = context.Request["keyword"] ?? string.Empty; List<Person> result = (from item in list
where item.PersonName.Contains(condition) //条件查询
select item).ToList<Person>(); resultDic.Add("total", result.Count);
resultDic.Add("rows", (result.Skip(Record * (PageNum - )).Take(Record)).ToList()); break;
} JavaScriptSerializer serializer = new JavaScriptSerializer(); context.Response.Write(serializer.Serialize(resultDic));
} public bool IsReusable
{
get
{
return false;
}
} /// <summary>
/// 模拟数据
/// </summary>
/// <returns></returns>
public List<Person> MockData()
{
List<Person> list = new List<Person>() {
new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "叶宇", Gender = "女" },
new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "张兄家", Gender = "男" },
new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "张洋", Gender = "男" },
new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "洪自军", Gender = "男" },
new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "王生杰", Gender = "男" },
new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "吴庆庆", Gender = "男" },
new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "武建昌", Gender = "男" },
new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "刘瑞", Gender = "男" },
new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "张辽", Gender = "男" },
new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "张颌", Gender = "男" },
new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "刘备", Gender = "男" },
new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "刘禅", Gender = "男" },
new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "刘表", Gender = "男" },
new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "张震岳", Gender = "男" },
new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "张学友", Gender = "男" },
new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "张信哲", Gender = "男" },
new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "张悬", Gender = "女" },
new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "张惠妹", Gender = "女" }
}; return list;
}