jquery通过递归为easyui生成无限级别的下拉树
该示例用jquery+easyui来生成下拉树的数据,通过ws传递一个datatable的json数据,然后将此数据在Js中生成easyui tree插件用的json数据,再加载到树上。
easyui的版本是jQuery EasyUI 1.2.5
获取第一级数据:
function BindTree() {
var gov = $("#dropCity").val();
var grade = $("#dropGrade").val();
var subject = $("#dropSubject").val();
var term = $("#dropTerm").val();
var edition = $("#dropEdition").val();
var week = $("#hidCurWeek").val();
$.ajax({
type: "POST",
contentType: "application/json",
url: "Handler/SysWeekSet.aspx/GetUnitList",
data: "{gov:'" + gov + "',grade:'" + grade + "',subject:'" + subject + "',term:'" + term + "',edition:'" + edition + "',week:'" + week + "'}",
dataType: "json",
success: function(data) {
var list = eval(data.d);
var jsonstr = "[";
for (var i = 0; i < list.length; i++) {
if (list[i].CODELEVEL == "1") {
if (jsonstr == "[")
jsonstr += "{\"id\":\"" + list[i].UNIT_CODE + "\",\"text\":\"" + list[i].UNIT_NAME + "\"" + BindChildNode(list, list[i].UNIT_CODE) + "}";
else
jsonstr += ",{\"id\":\"" + list[i].UNIT_CODE + "\",\"text\":\"" + list[i].UNIT_NAME + "\"" + BindChildNode(list, list[i].UNIT_CODE) + "}";
}
}
jsonstr += "]";
$('#treeUnit').tree("loadData", eval(jsonstr));
},
error: function() {
$.messager.alert('提醒', '数据传输失败');
}
});
}
var gov = $("#dropCity").val();
var grade = $("#dropGrade").val();
var subject = $("#dropSubject").val();
var term = $("#dropTerm").val();
var edition = $("#dropEdition").val();
var week = $("#hidCurWeek").val();
$.ajax({
type: "POST",
contentType: "application/json",
url: "Handler/SysWeekSet.aspx/GetUnitList",
data: "{gov:'" + gov + "',grade:'" + grade + "',subject:'" + subject + "',term:'" + term + "',edition:'" + edition + "',week:'" + week + "'}",
dataType: "json",
success: function(data) {
var list = eval(data.d);
var jsonstr = "[";
for (var i = 0; i < list.length; i++) {
if (list[i].CODELEVEL == "1") {
if (jsonstr == "[")
jsonstr += "{\"id\":\"" + list[i].UNIT_CODE + "\",\"text\":\"" + list[i].UNIT_NAME + "\"" + BindChildNode(list, list[i].UNIT_CODE) + "}";
else
jsonstr += ",{\"id\":\"" + list[i].UNIT_CODE + "\",\"text\":\"" + list[i].UNIT_NAME + "\"" + BindChildNode(list, list[i].UNIT_CODE) + "}";
}
}
jsonstr += "]";
$('#treeUnit').tree("loadData", eval(jsonstr));
},
error: function() {
$.messager.alert('提醒', '数据传输失败');
}
});
}
获取下级别数据并进行递归:
function BindChildNode(source,parcode) {
var result="";
for (var i = 0; i < source.length; i++) {
if(source[i].PARENTCODE==parcode)
{
if(result=="")
{
result=",\"children\":[";
result += "{\"id\":\"" + source[i].UNIT_CODE + "\",\"text\":\"" + source[i].UNIT_NAME + "\",\"checked\":" + source[i].ISSELECT + "" + BindChildNode(source, source[i].UNIT_CODE) + "}";
}
else
{
result += ",{\"id\":\"" + source[i].UNIT_CODE + "\",\"text\":\"" + source[i].UNIT_NAME + "\",\"checked\":" + source[i].ISSELECT + "" + BindChildNode(source, source[i].UNIT_CODE) + "}";
}
}
}
if(result!="")
result +="]";
return result;
}
var result="";
for (var i = 0; i < source.length; i++) {
if(source[i].PARENTCODE==parcode)
{
if(result=="")
{
result=",\"children\":[";
result += "{\"id\":\"" + source[i].UNIT_CODE + "\",\"text\":\"" + source[i].UNIT_NAME + "\",\"checked\":" + source[i].ISSELECT + "" + BindChildNode(source, source[i].UNIT_CODE) + "}";
}
else
{
result += ",{\"id\":\"" + source[i].UNIT_CODE + "\",\"text\":\"" + source[i].UNIT_NAME + "\",\"checked\":" + source[i].ISSELECT + "" + BindChildNode(source, source[i].UNIT_CODE) + "}";
}
}
}
if(result!="")
result +="]";
return result;
}