...........
语句没什么区别了......
这样带来的是严重的性能问题..
一次查询出来所有记录,然后通过程序进行递归算法,进行数据的转化.
量的时候,但是,一次只能显示一级,每次都要ajax请求下一级.
这样设计,主要是考虑方便前台后台的扩展,FId字段是一个为了方便前台查询而设计的,这样设计的好处就是如果查询比如顶级菜单下的所有产品,只需要根据模糊查询前缀匹配,就能把所有的产品都查询出来,设计的字段还是有点小,IsLeaf是为了判断
<!DOCTY
PE ht
ML P
ubLIC "-//W3C//DTD XHTML 1.0 Trans
ITional//EN" "http://www.w3.
org/TR/xhtml1/DTD/xhtml1
-transitional.dtd">
<html
XMlns="http://www.w3.org/1999/xhtml">
<head>
<title>产品类别管理</title>
<
;meta http-equiv="content-type" content="text/html; charset=UTF-8" />
<link
href="../css/demo.css" rel="stylesheet" type="text/css" />
<script src="../scripts/
jquery-1.6.2.min.js" type="text/javascript"></script>
<script src="../scripts/miniui/miniui.js" type="text/javascript"></script><link href="../scripts/miniui/themes/default/miniui.css" rel="stylesheet" type="text/css" />
<link href="../scripts/miniui/themes/icons.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div class="mini-toolbar">
<
h1>产品类别管理</h1>
<div class="mini-panel" title="产品类别管理" iconCls="icon-add" style="width:100%;h
eight:500px;"
showToolbar="true" showCollapseButton="true" showFooter="true"
>
<!--toolbar-->
<div
PRoperty="toolbar">
</div>
<!--footer-->
<div property="footer">
</div>
<!--body-->
<ul id="tree1" class="mini-tree" url="Data/GetProductInfo.ashx?method=GetProductType" style="width:100%;height:100%;padding:5px;"
showTreeIcon="true" textField="text" i
DField="id" contextMenu="
#treeMenu"
>
</ul>
<ul id="treeMenu" class="mini-menu" style="dis
play:none;" onbeforeopen="onBeforeOpen">
<!-- <li n
ame="move" iconCls="icon-move" onclick="onMoveNode">移动节点</li>-->
<li class="separator"></li>
<li name="addNode" onclick="onAddNode" iconCls="icon-add">插入节点</li>
<li name="edit" iconCls="icon-edit" onclick="onEditNode">编辑节点</li>
<li name="remove" iconCls="icon-remove" onclick="onRemoveNode">删除节点</li>
<li name="cancel" iconCls="icon-cancel" onclick="onCancel">取消</li>
<li class="separator"></li>
</ul>
</div>
<
br /><br />
</div>
<script type="text/javascript">
mini.parse();
VAR AddTpye="add";
function onCancel(e){
var tree=mini.get("tree1");
var node=tree.getSelectedNode();
tree.isE
xpandedNode (node);
}
function onAddBefore(e) {
AddType="before";
AddItem(e);
}
function onAddAfter(e)
{
AddType="after";
AddItem(e);
}
function AddItem(e) {
var tree = mini.get("tree1");
var node = tree.getSelectedNode();
var newNode = {id:0,text:"空",pid:node.id};
mini.p
rompt("请输入类别内容:", "请输入",
function (action, value) {
if (action
== "ok"){
$.ajax({
url:"Data/GetProductInfo.ashx",
type:"post",
data:"method=AddProductType&am
p;text="+value+"&pid="+node.id+"&IsLeaf="+tree.isLeaf(node),
success:function(msg){
if(msg){
alert("添加成功!");
TreeLoad();
// newNode.text=value;
// if(node!=null){
//
// tree.addNode(newNode, AddType, node);
// }
}
else
alert("添加失败!");
}
});
}
else {
newNode.text="空";
}
});
}
//刷新树
function TreeLoad(){
$.ajax({
url:"Data/GetProductInfo.ashx?method=GetProductType",
type:"json",
success:function(json){
var tree = mini.get("tree1");
// alert(json);
var data= eval("("+json+")");
tree.loadData(data);
}
});
}
function onAddNode(e) {
AddType="add";
AddItem(e);
}
function onEditNode(e) {
var tree = mini.get("tree1");
var node = tree.getSelectedNode();
mini.prompt("请输入类别内容:", "请输入",
function (action, value) {
if (action == "ok") {
$.ajax({
url:"Data/GetProductInfo.ashx",
type:"post",
data:"method=SaveProductType&id="+node.id+"&text="+value+"&pid="+node.pid+"&IsLeaf="+tree.isLeaf(node),
success:function(msg){
if(msg){
alert("保存成功!");
tree.setNodeText(node,value);
//TreeLoad();
}
else
alert("保存失败!");
}
});
}
});
}
function onRemoveNode(e) {
var tree = mini.get("tree1");
var node = tree.getSelectedNode();
if (node) {
if (confirm("确定删除选中节点?")) {
//这里提交到
服务器 $.ajax({
url:"Data/GetProductInfo.ashx",
type:"post",
data:"method=RemoveProductType&id="+node.id,
success:function(msg){
if(msg){
tree.removeNode(node);
alert("删除成功!");
}
else{
alert("删除失败!");
}
}
});
}
}
}
function onBeforeOpen(e) {
var menu = e.sender;
var tree = mini.get("tree1");
var node = tree.getSelectedNode();
// if (node
&& node.id == "-1") { //如果根节点(总根目录,那么阻止菜单显示)
// e.cancel = true;
// //阻止浏览器默认右键菜单
// e.htmlEvent.p
reventDefault();
// return;
// }
////////////////////////////////
var editItem = mini.getbyName("edit", menu);
var removeItem = mini.getbyName("remove", menu);
var addNodeItem=mini.getbyName("addNode",menu);
//var moveItem=mini.getbyName("move",menu);
editItem.show();
removeItem.show();
addNodeItem.show();
if (node.id == "-1") {//总根目录
removeItem.hide();
// moveItem.hide();
}
}
</script>
</body>
</html>
/// <summary>
/// 工艺品类别树转化为json格式
/// </summary>
/// <returns></returns>
public string craftTypeTreeToJson()
{
//传递的json格式
IEnumerable<crafttype> craftTypeList = new crafttypeDAL().ListAll();
StringBuilder sb = new StringBuilder("[");
for
each (crafttype root in craftTypeList)
{
if (root.Belongsid == -1)
{
sb.Append("{id:\"" + root.ID + "\",text:\"" + root.Name + "\"");
sb.Append(",pid:\"-1\"");//添加父节点
sb.Append(",expanded:\"false\"");
if (root.IsLeaf == "0")//如果是不是叶子节点,那么,就要递归添加children:[{xxx},内容
{
sb.Append(",children:");
GetLeafTree(ref sb, (int)root.ID, craftTypeList);//递归追加叶子
}
sb.Append("},");
}
}
sb.Remove(sb.Length - 1, 1); //去除掉最后一个多余的,
sb.Append("]");
return Common.FormatToJson.MiniUiToJsonForTree(sb.ToString(), "工艺品类别");
}
/// <summary>
/// 递归获得父级ID下的所有类别json数据
/// </summary>
/// <param name="sb">json字符串</param>
/// <param name="parentID">父级id</param>
/// <param name="craftTypeList">类别信息集合</param>
public void GetLeafTree(ref StringBuilder sb,int parentID,IEnumerable<crafttype> craftTypeList)
{
sb.Append("[");
foreach (crafttype leaf in craftTypeList)
{
if (leaf.Belongsid == parentID) //根据双亲节点查找叶子
{
sb.Append("{id:\"" + leaf.ID + "\",text:\"" + leaf.Name + "\"");
sb.Append(",pid:\"" + parentID + "\"");//添加父节点
sb.Append(",expanded:\"false\"");
if (leaf.IsLeaf == "0")//如果是不是叶子节点,那么,就要递归添加children:[{xxx},内容
{
sb.Append(",children:");
GetLeafTree(ref sb,(int)leaf.ID, craftTypeList);//递归追加叶子
}
sb.Append("},");
}
}
sb.Remove(sb.Length - 1, 1); //去除掉最后一个多余的,
sb.Append("]");
}
这个确实ajax一次性把数据全部加载进去,这样对性能有严重的损失,不过考虑是后台,所以,没做处理,不过最好还是用第二种方法设计,那种方法是最好的解决方法,也适合前台的数据展示.