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

时间:2021-01-18 05:20:06

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);
}

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>

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='<%# Eval("ParentResourceID") %>' />
<asp:HiddenField ID="hfdLevel" runat="server" Value='<%# Eval("NameValues[Level]") %>' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>

.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 = ; 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
}