GridView 树形结构分组的功能

在“会飞的鱼”博客中看到GridView实现树形结构的代码，经过修改，添加了树形结构中的复选框功能，欢迎吐槽。

源地址：http://www.cnblogs.com/chhuic/archive/2012/05/11/2495577.html

<script type="text/javascript">
        //树节点相关控制
        <!--
        function hideChildren(node) {
            var level = parseInt(node.getAttribute("level"));
            var nextNode = node.nextSibling;
            while (nextNode != null && parseInt(nextNode.getAttribute("level")) > level) {
                nextNode.style.display = "none"; nextNode = nextNode.nextSibling;               
            }
        }
        function showChildren(node) {
            var level = parseInt(node.getAttribute("level"));
            var id = node.getAttribute("id");
            var nextNode = node.nextSibling;
            while (nextNode != null && parseInt(nextNode.getAttribute("level")) > level) {
                if (nextNode.getAttribute("pid") == id) {
                    if (node.getAttribute("expand") == "1") {
                        nextNode.style.display = "";
                        showChildren(nextNode);
                    }
                    else {
                        nextNode.style.display = "none";
                    }
                }
                nextNode = nextNode.nextSibling;
            }
        }
        function setExpand(sender) {
            var curNode = sender.parentNode.parentNode;
            if (curNode.getAttribute("expand") == "1") {
                curNode.setAttribute("expand", "0");
                sender.src = "../../Common/Images/Down.gif";
                hideChildren(curNode);
            }
            else {
                curNode.setAttribute("expand", "1");
                sender.src = "../../Common/Images/Top.gif";
                showChildren(curNode);
            }
        } 
        function setCheck(sender){
            var curNode = sender.parentNode.parentNode;
            if (curNode.getAttribute("expand") == "1") {
                var level = parseInt(curNode.getAttribute("level"));
                var nextNode = curNode.nextSibling;
                while (nextNode != null && parseInt(nextNode.getAttribute("level")) > level) {
                     
                    var a=nextNode.firstChild.firstChild;
                    a.checked = sender.checked;
                    nextNode = nextNode.nextSibling; 
                }
                
            }
        }
        //-->
    </script>

<asp:GridView ID="gvList" runat="server" AutoGenerateColumns="False" CssClass="datatbl"
                Style=" 900px" DataKeyNames="ID,PID,Level,HasChild,processName,process,content" TreeColumnIndex="0"
                OnRowDataBound="gvList_RowDataBound">
                <Columns>
                    <asp:TemplateField HeaderText="检查编号">
                        <ItemTemplate>
                            <asp:CheckBox ID="cboProcess" onclick="setCheck(this)" runat="server" />
                            <asp:Label ID="Label1" runat="server" Text='<%# Bind("process") %>'></asp:Label>
                        </ItemTemplate>
                        <HeaderStyle Width="200px" />
                    </asp:TemplateField>
                    <asp:BoundField HeaderText="检查内容" DataField="content">
                        <HeaderStyle Width="700px" />
                    </asp:BoundField>
                    <asp:BoundField DataField="level" HeaderText="level" Visible="False" />
                </Columns>
                <EmptyDataTemplate>
                    <div class="tip">
                        暂无记录！</div>
                </EmptyDataTemplate>
                <HeaderStyle HorizontalAlign="Center" CssClass="head"></HeaderStyle>
                <PagerStyle HorizontalAlign="Right"></PagerStyle>
                <AlternatingRowStyle CssClass="alter"></AlternatingRowStyle>
                <RowStyle CssClass="item"></RowStyle>
            </asp:GridView>

protected void gvList_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                # region 生成树形结构
                string id = gvList.DataKeys[e.Row.RowIndex]["ID"].ToString();
                string pid = gvList.DataKeys[e.Row.RowIndex]["PID"].ToString();
                string level = gvList.DataKeys[e.Row.RowIndex]["Level"].ToString();
                string checkNo = gvList.DataKeys[e.Row.RowIndex]["process"].ToString();

                
                //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);
                e.Row.Attributes.Add("expand", "1");
                int indent = (int.Parse(level) - 1) * 20;
                //判断是否有子节点
                if (gvList.DataKeys[e.Row.RowIndex]["HasChild"].ToString() == "1")
                {
                    //设置父节点前面的图片和点击事件
                    HtmlImage img = new HtmlImage();
                    img.Src = "../../Common/Images/Top.gif";
                    img.Attributes.Add("onclick", "setExpand(this)");
                    img.Style.Add("cursor", "pointer");
                    e.Row.Cells[0].Controls.AddAt(0, img);
                    e.Row.Cells[0].Style["font-weight"] = "bold";
                    indent += 5;
                }
                else
                {
                    indent += 16;
                }

                e.Row.Cells[0].Style["padding-left"] = indent + "px";
                e.Row.Cells[0].Controls.Add(new LiteralControl(e.Row.Cells[0].Text));
                # endregion
                e.Row.Attributes["onmouseover"] = "style.backgroundColor='#F2FDDB'";
                e.Row.Attributes["onmouseout"] = "style.backgroundColor=''";
            }

        }