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扩展 easyui 控件系列：为datagrid 增加过滤行

此功能还为真正完成，起到抛砖引玉的效果，发动大家的力量把这个功能完善起来，效果图如下：

基本上就是扩展了 datagrid.view 中的onAfterRender 这个事件，具体代码如下：

$.extend($.fn.datagrid.defaults.view,{
            onAfterRender:function(target){
                var dc = $.data(target,'datagrid').dc;
                if(dc.header2.find('[filter="true"]').length == 0){
                    var header = dc.header1; //固定列表头
                    var header2 = dc.header2; // 常规列表头
                    var filterRow = $('<tr></tr>');
                    var opts = $.data(target,'datagrid').options;
                    var columns = opts.columns;
                    var frozenColumns = opts.frozenColumns;

                    $.each(frozenColumns[0],function(){
                        if(!this.checkbox){
                            var w = header.find('[field="'+this.field+'"] > div').width();

                            filterRow.append('<td><input style="'+w+'px"/></td>');
                        }
                        else{
                            header.find('.datagrid-header-check').parent().attr('rowspan',2)
                        }
                    });
                    header.find('tbody').append(filterRow);
                    filterRow = $('<tr filter="true"></tr>');

                    $.each(columns[0],function(){
                        var w = header2.find('[field="'+this.field+'"] > div').width();
                        if(this.hfilter){
                            var a = $('<input field="'+this.field+'" class="easyui-combobox" style="'+w+'px" />');
                            filterRow.append($('<td></td>').append(a));
                            a.data('options',this.hfilter);
                        }else{
                            filterRow.append('<td><input style="'+w+'px"/></td>');
                        }

                    });

                    header2.find('tbody').append(filterRow);

                    var dgData = $(target).datagrid('getData').rows;

                    header2.find('input[field]').each(function(){
                        var opts = $(this).data('options');
                        var field = $(this).attr('field');
                        $.extend(opts.options,{
                            onSelect:function(item){
                                var d = _.filter(dgData,function(row){
                                    return row[field].indexOf(item[opts.options.textField]) > -1;
                                });

                                $(target).datagrid('loadData',d);
                            }
                        });

                        $(this)[opts.type](opts.options);
                    })
                }
            }
        });

在定义列时，我们加上个自定义的属性

{ title: '部门名称', field: 'depname',  120,hfilter:{type:'combobox',options:{data:roleData,valueField:'KeyId',textField:'RoleName'}} }

红色字体就是自定义的属性，用来定义过滤行中的控件的

在使用的时候，扩展的代码要放到Datagrid 初始化的前边！

示例DEMO 完整代码

<!DOCTYPE html>
<html>
<head>
    <title></title>
    <link rel="stylesheet" type="text/css" href="../../jquery-easyui-1.3.3/themes/2013/easyui.css">
    <link rel="stylesheet" type="text/css" href="../../jquery-easyui-1.3.3/themes/icon.css">
    <link rel="stylesheet" type="text/css" href="../../jquery-easyui-1.3.3/themes/default/lookup.css">

    <script type="text/javascript" src="../../jquery-easyui-1.3.3/jquery-1.10.2.min.js"></script>
    <script type="text/javascript" src="../../jquery-easyui-1.3.3/jquery-migrate-1.2.1.min.js"></script>
    <script type="text/javascript" src="../../jquery-easyui-1.3.3/jquery.easyui.min.js"></script>

    <script src="../../jquery-easyui-1.3.3/locale/easyui-lang-zh_CN.js"></script>
    <script src="../../jquery-easyui-1.3.3/underscore-min.js"></script>

</head>
<body>


    <table id=userlist></table>


    <script>
       
        var userData ={"total":6,"rows":[{"KeyId":1,"UserName":"admin2","Password":"93BCC5699183BED3AD5E3C050ADEF183","PassSalt":"K6FqbXXK","Email":"hxl_apple@163.com","IsAdmin":false,"IsDisabled":false,"TrueName":"疯狂秀才","DepartmentId":4,"Mobile":"","QQ":"","Remark":"","AddTime":null,"MenusJson":null,"ConfigJson":"{"theme":{"title":"默认皮肤","name":"default"},"showType":"menubutton","gridRows":"40"}","depname":"生产部","Departments":"4,15"},{"KeyId":9,"UserName":"admin","Password":"7D34608F3723F586DC28FC5D88BCECC6","PassSalt":"ZWvu4jSn","Email":"hxl_apple@163.com","IsAdmin":true,"IsDisabled":false,"TrueName":"疯狂秀才","DepartmentId":3,"Mobile":"18668088525","QQ":"1055818239","Remark":"系统默认帐号，不可删除","AddTime":null,"MenusJson":null,"ConfigJson":"{"theme":{"title":"流行灰","name":"gray"},"showType":"Accordion2","gridRows":"20","showValidateCode":false}","depname":"综合办公室","Departments":"3,15"},{"KeyId":10,"UserName":"test","Password":"5C7E95836A99FB74723F54C43511154A","PassSalt":"RGVJejaR","Email":"","IsAdmin":false,"IsDisabled":false,"TrueName":"Test1","DepartmentId":1,"Mobile":"","QQ":"","Remark":"","AddTime":null,"MenusJson":null,"ConfigJson":null,"depname":"幸福集团","Departments":"3,4,15,5"},{"KeyId":12,"UserName":"ddd","Password":"7A3C56FA5A59953C058E7525FA0F754F","PassSalt":"O8RnCnaH","Email":"","IsAdmin":false,"IsDisabled":false,"TrueName":"ddd","DepartmentId":0,"Mobile":"","QQ":"","Remark":"","AddTime":null,"MenusJson":null,"ConfigJson":null,"depname":"","Departments":""},{"KeyId":13,"UserName":"eee","Password":"2FE5DFAE3F8AC41F907FCF8B1C1579D7","PassSalt":"vKbkyBib","Email":"","IsAdmin":false,"IsDisabled":false,"TrueName":"eeee","DepartmentId":3,"Mobile":"","QQ":"","Remark":"","AddTime":null,"MenusJson":null,"ConfigJson":null,"depname":"综合办公室","Departments":""},{"KeyId":15,"UserName":"007","Password":"9E704A8699D72ADA11A7EB7BF07739FA","PassSalt":"bcLJiqHB","Email":"","IsAdmin":false,"IsDisabled":false,"TrueName":"007","DepartmentId":1,"Mobile":"","QQ":"","Remark":"","AddTime":null,"MenusJson":null,"ConfigJson":null,"depname":"幸福集团","Departments":""}]}
        var roleData = [{"KeyId":2,"RoleName":"生产部","Sortnum":2,"Remark":"工程师","IsDefault":0,"Navigations":null,"Users":null,"Departments":""},
            {"KeyId":3,"RoleName":"幸福集团","Sortnum":1,"Remark":"6666","IsDefault":0,"Navigations":null,"Users":null,
                "Departments":"1,3,4,15,5,9,10,11,12,13,14,8"},
            {"KeyId":17,"RoleName":"综合办公室","Sortnum":1,"Remark":"","IsDefault":1,"Navigations":null,"Users":null,"Departments":"1,4,15"},{"KeyId":20,"RoleName":"普通用户","Sortnum":3,"Remark":"","IsDefault":0,"Navigations":null,"Users":null,"Departments":"1,3,4,15,5,9,10,11,12,13,14,8"}]


        $.extend($.fn.datagrid.defaults.view,{
            onAfterRender:function(target){
                var dc = $.data(target,'datagrid').dc;
                if(dc.header2.find('[filter="true"]').length == 0){
                    var header = dc.header1; //固定列表头
                    var header2 = dc.header2; // 常规列表头
                    var filterRow = $('<tr></tr>');
                    var opts = $.data(target,'datagrid').options;
                    var columns = opts.columns;
                    var frozenColumns = opts.frozenColumns;

                    $.each(frozenColumns[0],function(){
                        if(!this.checkbox){
                            var w = header.find('[field="'+this.field+'"] > div').width();

                            filterRow.append('<td><input style="'+w+'px"/></td>');
                        }
                        else{
                            header.find('.datagrid-header-check').parent().attr('rowspan',2)
                        }
                    });
                    header.find('tbody').append(filterRow);
                    filterRow = $('<tr filter="true"></tr>');

                    $.each(columns[0],function(){
                        var w = header2.find('[field="'+this.field+'"] > div').width();
                        if(this.hfilter){
                            var a = $('<input field="'+this.field+'" class="easyui-combobox" style="'+w+'px" />');
                            filterRow.append($('<td></td>').append(a));
                            a.data('options',this.hfilter);
                        }else{
                            filterRow.append('<td><input style="'+w+'px"/></td>');
                        }

                    });

                    header2.find('tbody').append(filterRow);

                    var dgData = $(target).datagrid('getData').rows;

                    header2.find('input[field]').each(function(){
                        var opts = $(this).data('options');
                        var field = $(this).attr('field');
                        $.extend(opts.options,{
                            onSelect:function(item){
                                var d = _.filter(dgData,function(row){
                                    return row[field].indexOf(item[opts.options.textField]) > -1;
                                });

                                $(target).datagrid('loadData',d);
                            }
                        });

                        $(this)[opts.type](opts.options);
                    })
                }
            }
        });



        $(function(){
            $('#userlist').datagrid({
                toolbar:'#toolbar',
                data:userData,
                fit:true,
                title:'用户列表',
                selectOnCheck:false,
                checkOnSelect:true,
                singleSelect:true,
                //tools:[{iconCls:'icon-add'}],
                frozenColumns:[[
                    {checkbox:true},
                    { title: 'ID', field: 'KeyId',  40, sortable: true },
                    { title: '用户名', field: 'UserName',  100, sortable: true }
                ]],

                columns:[[
                    { title: '真实姓名', field: 'TrueName',  100, sortable: true },
                    { title: '部门名称', field: 'depname',  120,hfilter:{type:'combobox',options:{data:roleData,valueField:'KeyId',textField:'RoleName'}} },
                    { title: '邮箱', field: 'Email',  100, sortable: true },
                    {
                        title: '超管',
                        field: 'IsAdmin',
                         60,
                        align: 'center',
                        formatter: function (v, d, i) {
                            if (d.UserName == "admin")
                                return '';
                            return v ? '√':'x'
                        }
                    },
                    {
                        title: '状态',
                        field: 'IsDisabled',
                         60,
                        align: 'center',
                        formatter: function (v, d, i) {
                            if (d.UserName == "admin")
                                return '';
                            return v ? '√':'x'
                        }
                    },{title:'描述',field:'Remark',160}
                ]],
                pagination: true,
                pageSize:20,
                rowStyler: function (index, row, css) {
                    if (row.UserName=="admin") {
                        return 'font-weight:bold;';
                    }
                }

            });
        });



    </script>


</body>
</html>

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原文地址：https://www.cnblogs.com/hxling/p/3289277.html