基于EasyUI的软件框架打造-树(Tree)封装

软件产品，最常用的控件，树(Tree)封装对使用更方便:





客户端：

//树 id:控件ID show:是否能维护树:true不能;false能;fun(node, checked)
_this.UI_Tree = function (uid, checkbox, isShow, fun) {
if (isShow) { //显示非维护模式
var _tree = $("#" + uid).tree({
method: "get",
animate: true,
checkbox: checkbox,
url: path + "exec.ashx?m=TreeBuild" + "&p={uid:" + escape(uid) + "'}"
});
} else { //维护模式
$("<div id='" + uid + "Menu' class='easyui-menu' style='width:120px;'><div onclick='' iconCls='icon-add'>添加</div><div onclick='' iconCls='icon-edit'>修改</div><div onclick='' iconCls='icon-remove'>删除</div></div>").appendTo("body");
$("#" + uid + "Menu").menu({
onClick: function (item) {
var node = $("#" + uid).tree("getSelected");
if (node != null) {
if (item.text == '添加') {
_this.exec("TreeAdd", { uid: uid, pid: node.id,text:"新记录" }, {}, null);
}
if (item.text == '修改') {
$("#" + uid).tree("beginEdit", node.target);
}
if (item.text == '删除') {
_this.exec("TreeDelete", { uid: uid, id: node.id }, {}, null);
}
}
else alert('请高亮选择一项');
}
});
var _tree = $("#" + uid).tree({
method: "get",
animate: true,
dnd: true,
checkbox: checkbox,
url: path + "exec.ashx?m=TreeBuild" + "&p={uid:" + escape(uid) + "'}",
onCheck: function (node, checked) { if (fun) fun(node, checked); },
onSelect: function (node) { if (fun) fun(node, true); },
onDblClick: function (node) { $("#" + uid).tree("beginEdit", node.target); },
onBeforeEdit: function (node) { if (node.id == 0) return false; },
onAfterEdit: function (node) {
_this.exec("TreeEdit", { uid: uid, id: node.id, newText: node.text }, {}, null);
},
onDrop: function (target, source, point) {
_this.exec("TreeMove", { uid: uid, target: $("#" + uid).tree('getNode', target).id, source: source.id, point: point }, {}, null);
},
onContextMenu: function (e, node) {
$("#" + uid + "Menu").menu("show", {
left: e.pageX,
top: e.pageY
});
}
});
}
}

服务器端：

public class TreeNode
{
public string id; //节点ID，这是很重要的加载远程数据
public string text;//文字显示节点
public bool state = false;//节点的状态，“开放open”或“关闭closed”，默认为“打开”。 当设置为“关闭”，该节点有子节点，并将它们远程加载
public bool isCheck = false;//指示节点是否被选中选中
public NameValueCollection attributes;//自定义属性可以被添加到一个节点
public ArrayList children;//一个数组节点有一些子节点
public TreeNode(string _id, string _text)
{
children = new ArrayList();
attributes = new NameValueCollection();
id = _id;
text = _text;
}
public void Add(TreeNode tn)
{
children.Add(tn);
}
public JsonObject Json
{
get
{
JsonArray ja_children = new JsonArray();
if (children.Count > 0)
{
for (int i = 0; i < children.Count; i++)
{
ja_children.Add((children[i] as TreeNode).Json);
}
}
string[] _name = new string[attributes.Count];
object[] _value = new object[attributes.Count];
for (int i = 0; i < attributes.Count; i++)
{
_name[i] = attributes.GetKey(i);
_value[i] = attributes[i];
}
JsonObject jo_attributes = new JsonObject(_name, _value);

string[] name = new string[] { "id", "text", "state", "isCheck", "attributes", "children" };
object[] value = new object[] { id, text, state ? "closed" : "open", isCheck, jo_attributes, ja_children };
return (new JsonObject(name, value));
}
}
public string toJson()
{
return JsonConvert.ExportToString(Json);
}
}
public class Tree
{
public string idField = "ID";
public string textField = "名称";
public string parentField = "ParentID";
public ArrayList nodes;
public Tree()
{
nodes = new ArrayList();
}
public Tree(string ParentID,DataTable dt)
{
nodes = new ArrayList();
DataRow[] drs = dt.Select(parentField + "=" + ParentID);
if (ParentID == "0")
{
TreeNode allNode = new TreeNode("0", "所有分类");
if (drs.Length > 0) allNode.state = false;
nodes.Add(allNode);
foreach (DataRow dr in drs)
{
TreeNode node = new TreeNode(dr[idField].ToString(), dr[textField].ToString());
node.state = dt.Select(parentField + "=" + dr[idField].ToString()).Length>0;
allNode.Add(node);
}
}
else
{
foreach (DataRow dr in drs)
{
TreeNode node = new TreeNode(dr[idField].ToString(), dr[textField].ToString());
node.state = dt.Select(parentField + "=" + dr[idField].ToString()).Length > 0;
nodes.Add(node);
}
}

}
public void Add(TreeNode tn)
{
nodes.Add(tn);
}
public string toJson()
{
JsonArray ja = new JsonArray();
if (nodes.Count > 0)
{
for (int i = 0; i < nodes.Count; i++)
{
ja.Add((nodes[i] as TreeNode).Json);
}
}
return JsonConvert.ExportToString(ja);
}
}