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实现CheckBox的三种选中状态(全选、半选、不选)在GridView中模拟树形的功能

度娘了很多帖子,只说三种状态要用图片替换来做,但没找到有用的例子,被逼自己写了一个

三方控件肯定是很多的,如jstree,可以直接用

由于公司的UDS限制,不能上传图片,只能文字说明了。

就是要在gridview中实现如下效果:一级、二级因为三级没有全部选中而显示半选状态

?一级
   ?二级
      三级1
       三级2

 

 

 

 

js↓

$(function(){        BindCheckNode();        $("span[name^=‘lblCheck‘]").click(checkBoxClick);     });function checkBoxClick()     {        var isChecked = $(this).attr("class") == "default" ? "checked"  : "default";        $(this).attr("class",isChecked);        //同步checkbox        $(this).next().children().eq(0).attr("checked",isChecked!="default");          var trNode = $(this).parent().parent();                childChange(trNode,isChecked);        parentChange(trNode,isChecked);      }//数据绑定时,对选中状态的节点做变更,如果有一个子节点没有选中,则为半选中状态       function BindCheckNode()       {           //判断选中状态的节点的子节点是否全部选中,           $("span[name^=‘lblCheck‘]").each(function(){                if($(this).attr("class")=="checked")                {                    var curNode = this.parentNode.parentNode;                    if(!CheckAll(curNode))                    {                        $(this).attr("class","checkHalf");                    }                 }            });       }                     //选中状态判断       function CheckAll(curNode)        {         var level = parseInt($(curNode).attr("level"));         var id = $(curNode).attr("id");         var nextNode = $(curNode).next();         while (nextNode != null && parseInt($(nextNode).attr("level")) > level) {            //每个节点都要循环它的所有子节点,判断是否选择             var nextCheck=$(nextNode).children().eq(0).children("span").eq(1);              if ($(nextCheck).attr("class") == "default") {                 return false;                }             nextNode = $(nextNode).next();         }         return true;      }          //checkbox点击后影响子节点     function childChange(curNode,className)     {        var level = parseInt($(curNode).attr("level"));        var nextNode = $(curNode).next();                //循环子节点        while(nextNode!=null && parseInt($(nextNode).attr("level") ) > level)        {            var nextCheck=$(nextNode).children().eq(0).children("span:eq(1)");             $(nextCheck).attr("class",className);            $(nextCheck).next().children().eq(0).attr("checked",className!="default");               nextNode=$(nextNode).next();          }      }          //checkbox点击后影响父节点     function parentChange(curNode, className)     {        var pid = $(curNode).attr("pid");        var parentNode = $("#"+pid);        if(!$(parentNode).attr("pid"))            return false;                var parentSpanCheck=$(parentNode).children().eq(0).children("span").eq(1);        var childList = $("tr[pid=‘"+pid+"‘]");        var flag = false;        var tempNode;        $.each(childList, function(i,item){            tempNode = $(item).children().eq(0).children("span").eq(1);            if($(tempNode).attr("class") != className)           {                flag = true;                 return;           }        });        if(flag)        {            $(parentSpanCheck).attr("class", "checkHalf");        }         else if(!flag && className == "checked")        {             $(parentSpanCheck).attr("class", "checked");        }        else        {             $(parentSpanCheck).attr("class", "default");        }        var parentSpanCheckClass=$(parentSpanCheck).attr("class");        $(parentSpanCheck).next().children().eq(0).attr("checked",parentSpanCheckClass!="default");           if(pid != "0")            changeParentState(parentNode, className);     }
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css↓  主要是背景图的移动,图片排列方式为 [全选][未选][半选]

 <style type="text/css">        .checked {background-position-x: 0px;}        .checkHalf{background-position-x: 23px;}        .default{background-position-x: 46px;}    </style>
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C#前台 ↓  已将多余的东西删掉,gridview中只有一列,跟上面的table相似,lbl_Space用来增加缩进的,保留原始的checkbox,因为在保存的时候需要遍历整个gridview,不管是后台还是js中修改span的class属性,遍历gridview的时候是获取不到的

<asp:GridView ID="dgResource" OnRowDataBound="dgResource_RowDataBound" DataKeyNames="ResourceID" runat="server" AutoGenerateColumns="False">                        <Columns>                            <asp:TemplateField>                                <HeaderStyle Wrap="False"></HeaderStyle>                                <ItemStyle Wrap="False"></ItemStyle>                                <ItemTemplate>                                    <asp:Label runat="server" ID="lbl_Space" ForeColor="#f5fbff" Text=<%# GetSpaceNameFromLevel(DataBinder.Eval(Container, "DataItem.NameValues[Level]").ToString()) %>>                                    </asp:Label>                                    <span id="lblCheck" name="lblCheck" runat="server" class="default" style="width: 23px;                                        height: 25px; background-image: url(../../Common/Images/Icons/checkboxButton.jpg);">                                    </span>                                   <div style="display:none;">                                    <asp:CheckBox runat="server" ID="chk_Query"></asp:CheckBox>                                   </div>                                      <asp:Label runat="server" Text=<%# DataBinder.Eval(Container, "DataItem.ResourceName") %>></asp:Label>                                    <asp:HiddenField ID="hfdPID" runat="server" Value=http://www.mamicode.com/<%# Eval("ParentResourceID") %> />                <asp:HiddenField ID="hfdLevel" runat="server" Value=http://www.mamicode.com/<%# Eval("NameValues[Level]") %> />                                </ItemTemplate>                            </asp:TemplateField>                        </Columns>                    </asp:GridView>
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.net ↓

protected void dgResource_RowDataBound(object sender, GridViewRowEventArgs e)        {            if (e.Row.RowType == DataControlRowType.DataRow)            {                string id = ParamUtil.getstring(dgResource.DataKeys[e.Row.RowIndex]["ResourceID"]);                string pid = (e.Row.FindControl("hfdPID") as HiddenField).Value;                string level = (e.Row.FindControl("hfdLevel") as HiddenField).Value;                string application = (e.Row.FindControl("hfdApplication") as HiddenField).Value;                //增加节点的属性                e.Row.Attributes.Add("id", id);                e.Row.Attributes.Add("pid", pid);                e.Row.Attributes.Add("level", level);        }}//点击保存时for (int i = 0; i < dgResource.Rows.Count; i++){    CheckBox chkQuery = (CheckBox)dgResource.Rows[i].FindControl("chk_Query");    //根据chkQuery的Checked即可获取是否选中,注:半选也算选中}
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实现CheckBox的三种选中状态(全选、半选、不选)在GridView中模拟树形的功能