easyui combogrid下拉表格的分页/按键/动态搜索

2018/02/27 10:07
阅读数 35

作者:xfl4629712  《  easyui combogrid下拉表格的分页/按键/动态搜索  》

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

  1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
  2 <html xmlns="http://www.w3.org/1999/xhtml">
  3 <head>
  4     <title></title>
  5     <link rel="external nofollow" href="style/js/easyui/themes/metro-green/easyui.css" rel="stylesheet" type="text/css" />
  6     <link rel="external nofollow" href="style/js/easyui/themes/icon.css" rel="stylesheet" type="text/css" />
  7     <script src="style/js/easyui/jquery.min.js" type="text/javascript"></script>
  8     <script src="style/js/easyui/jquery.easyui.min.js" type="text/javascript"></script>
  9     <script src="style/js/easyui/locale/easyui-lang-zh_CN.js" type="text/javascript"></script>
 10     <script src="style/js/biz/comboGridBiz.js" type="text/javascript"></script>
 11 </head>
 12 <body>
 13     <h3>EasyUI ComboGrid 集成分页示例</h3>
 14     <div><input id="cg" style="width:150px" /><input type="text" id="txtGender" /></div>
 15     <input type="hidden" id="hdKeyword" />
 16 </body>
 17 </html>

2、js代码。

  1 $(function () {
  2     $('#cg').combogrid({
  3         panelWidth: 400,
  4         idField: 'PersonId',        //ID字段    
  5         textField: 'PersonName',    //显示的字段    
  6         url: "ashx/ComboGridHandler.ashx?action=search",
  7         fitColumns: true,
  8         striped: true,
  9         editable: true,
 10         pagination: true,           //是否分页  
 11         rownumbers: true,           //序号  
 12         collapsible: false,         //是否可折叠的  
 13         fit: true,                  //自动大小  
 14         method: 'post',
 15         columns: [[
 16                     { field: 'PersonId', title: '用户编号', width: 80, hidden: true },
 17                     { field: 'PersonName', title: '用户名称', width: 150 },
 18                     { field: 'Gender', title: '用户性别', width: 150 }
 19                 ]],
 20         keyHandler: {
 21             up: function () {               //【向上键】押下处理  
 22                 //取得选中行  
 23                 var selected = $('#cg').combogrid('grid').datagrid('getSelected');
 24                 if (selected) {
 25                     //取得选中行的rowIndex  
 26                     var index = $('#cg').combogrid('grid').datagrid('getRowIndex', selected);
 27                     //向上移动到第一行为止  
 28                     if (index > 0) {
 29                         $('#cg').combogrid('grid').datagrid('selectRow', index - 1);
 30                     }
 31                 } else {
 32                     var rows = $('#cg').combogrid('grid').datagrid('getRows');
 33                     $('#cg').combogrid('grid').datagrid('selectRow', rows.length - 1);
 34                 }
 35             },
 36             down: function () {             //【向下键】押下处理  
 37                 //取得选中行  
 38                 var selected = $('#cg').combogrid('grid').datagrid('getSelected');
 39                 if (selected) {
 40                     //取得选中行的rowIndex  
 41                     var index = $('#cg').combogrid('grid').datagrid('getRowIndex', selected);
 42                     //向下移动到当页最后一行为止  
 43                     if (index < $('#cg').combogrid('grid').datagrid('getData').rows.length - 1) {
 44                         $('#cg').combogrid('grid').datagrid('selectRow', index + 1);
 45                     }
 46                 } else {
 47                     $('#cg').combogrid('grid').datagrid('selectRow', 0);
 48                 }
 49             },
 50             enter: function () {             //【回车键】押下处理  
 51                 //设置【性别】文本框的内容为选中行的的性别字段内容  
 52                 $('#txtGender').val($('#cg').combogrid('grid').datagrid('getSelected').Gender);
 53                 //选中后让下拉表格消失  
 54                 $('#cg').combogrid('hidePanel');
 55             },
 56             query: function (keyword) {     //【动态搜索】处理  
 57                 //设置查询参数  
 58                 var queryParams = $('#cg').combogrid("grid").datagrid('options').queryParams;
 59                 queryParams.keyword = keyword;
 60                 $('#cg').combogrid("grid").datagrid('options').queryParams = queryParams;
 61                 //重新加载  
 62                 $('#cg').combogrid("grid").datagrid("reload");
 63 
 64                 $('#cg').combogrid("setValue", keyword);
 65                 //将查询条件存入隐藏域  
 66                 $('#hdKeyword').val(keyword);
 67             }
 68         },
 69         onSelect: function () {              //选中处理  
 70             $('#txtGender').val($('#cg').combogrid('grid').datagrid('getSelected').Gender);
 71         }
 72     });
 73 
 74     //取得分页组件对象  
 75     var pager = $('#cg').combogrid('grid').datagrid('getPager');
 76 
 77     if (pager) {
 78         $(pager).pagination({
 79             pageSize: 10,               //每页显示的记录条数,默认为10  
 80             pageList: [10, 5, 3],       //可以设置每页记录条数的列表  
 81             beforePageText: '第',       //页数文本框前显示的汉字  
 82             afterPageText: '页    共 {pages} 页',
 83             displayMsg: '当前显示 {from} - {to} 条记录   共 {total} 条记录',
 84             //选择页的处理  
 85             onSelectPage: function (pageNumber, pageSize) {
 86                 //按分页的设置取数据  
 87                 getData(pageNumber, pageSize);
 88                 //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  
 89                 $('#cg').combogrid("grid").datagrid('options').pageSize = pageSize;
 90                 //将隐藏域中存放的查询条件显示在combogrid的文本框中  
 91                 $('#cg').combogrid("setValue", $('#hdKeyword').val());
 92                 $('#txtGender').val('');
 93             },
 94             //改变页显示条数的处理  
 95             //(处理后还是走onSelectPage事件,所以设置也写到onSelectPage事件中了)  
 96             onChangePageSize: function () { },
 97             //点击刷新的处理  
 98             onRefresh: function (pageNumber, pageSize) {
 99                 //按分页的设置取数据  
100                 getData(pageNumber, pageSize);
101                 //将隐藏域中存放的查询条件显示在combogrid的文本框中  
102                 $('#cg').combogrid("setValue", $('#hdKeyword').val());
103                 $('#txtGender').val('');
104             }
105         });
106     }
107 
108     var getData = function (page, rows) {
109         $.ajax({
110             type: "POST",
111             url: "ashx/ComboGridHandler.ashx?action=search",
112             data: "page=" + page + "&rows=" + rows + "&keyword=" + $('#hdKeyword').val(),
113             error: function (XMLHttpRequest, textStatus, errorThrown) {
114                 alert(textStatus);
115                 $.messager.progress('close');
116             },
117             success: function (data) {
118                 $('#cg').combogrid('grid').datagrid('loadData', data);
119             }
120         });
121     };
122 });

3、ashx代码

  1 /// <summary>
  2 /// ComboGridHandler 的摘要说明
  3 /// </summary>
  4 public class ComboGridHandler : IHttpHandler
  5 {
  6     /// <summary>
  7     ///
  8     /// </summary>
  9     /// <param name="context"></param>
 10     public void ProcessRequest(HttpContext context)
 11     {
 12         context.Response.ContentType = "application/json";
 13         string action = context.Request.Params["action"];
 14 
 15         //页数
 16         int PageNum = Convert.ToInt32(context.Request["page"]);
 17         //每一页多少条数据
 18         int Record = Convert.ToInt32(context.Request["rows"]);
 19 
 20         //模拟数据
 21         List<Person> list = MockData();
 22         Dictionary<string, object> resultDic = new Dictionary<string, object>();
 23 
 24         switch (action)
 25         {
 26             case "search":
 27                 var condition = context.Request["keyword"] ?? string.Empty;
 28                 List<Person> result = (from item in list
 29                             where item.PersonName.Contains(condition)    //条件查询
 30                             select item).ToList<Person>();
 31                 resultDic.Add("total", result.Count);
 32                 resultDic.Add("rows", (result.Skip(Record * (PageNum - 1)).Take(Record)).ToList());
 33                 break;
 34         }
 35 
 36         JavaScriptSerializer serializer = new JavaScriptSerializer();
 37         context.Response.Write(serializer.Serialize(resultDic));
 38     }
 39 
 40     public bool IsReusable
 41     {
 42         get
 43         {
 44             return false;
 45         }
 46     }
 47 
 48     /// <summary>
 49     /// 模拟数据
 50     /// </summary>
 51     /// <returns></returns>
 52     public List<Person> MockData()
 53     {
 54         List<Person> list = new List<Person>() {
 55             new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "叶宇", Gender = "女" },
 56             new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "张兄家", Gender = "男" },
 57             new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "张洋", Gender = "男" },
 58             new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "洪自军", Gender = "男" },
 59             new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "王生杰", Gender = "男" },
 60             new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "吴庆庆", Gender = "男" },
 61             new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "武建昌", Gender = "男" },
 62             new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "刘瑞", Gender = "男" },
 63             new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "张辽", Gender = "男" },
 64             new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "张颌", Gender = "男" },
 65             new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "刘备", Gender = "男" },
 66             new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "刘禅", Gender = "男" },
 67             new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "刘表", Gender = "男" },
 68             new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "张震岳", Gender = "男" },
 69             new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "张学友", Gender = "男" },
 70             new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "张信哲", Gender = "男" },
 71             new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "张悬", Gender = "女" },
 72             new Person(){ PersonId = Guid.NewGuid().ToString(), PersonName = "张惠妹", Gender = "女" }
 73         };
 74         return list;
 75     }
 76 }

4、实体类代码

  1 [Serializable]
  2 public class Person
  3 {
  4     public string PersonId { get; set; }
  5 
  6     public string PersonName { get; set; }
  7 
  8     public string Gender { get; set; }
  9 }
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