treeview 的应用
前台
<script src="js/jquery-1.4.1.min.js" type="text/javascript"></script>
<script type="text/javascript">
function CheckEvent(event)
{
evt=window.event||evt;
var objNode = evt.srcElement||evt.target;
if(objNode.tagName == "INPUT" && objNode.type== "checkbox")
{
var objParentDiv = objNode.id.replace("CheckBox","Nodes");
if(objNode.checked==true)
{
setChildCheckState(objParentDiv,true);
setParentCheckeState(objNode,true);
}
else
{
setChildCheckState(objParentDiv,false);
if(!HasOtherChecked(objNode)){
setParentCheckeState(objNode,false);
}
}
}
}
//判断是否有并行的其他节点被选中
function HasOtherChecked(objNode)
{
var objParentDiv = WebForm_GetParentByTagName(objNode, "div");
var chks = objParentDiv.getElementsByTagName("INPUT");
for(var i=0;i<chks.length;i++){
if(chks[i].checked && chks[i].id != objNode.id)
{
return true;
}
}
return false;
}
//设置父节点
function setParentCheckeState(objNode,chkstate)
{
try{
var objParentDiv = WebForm_GetParentByTagName(objNode, "div");
if(objParentDiv == null || objParentDiv == "undefined "){
return;
}
else{
var objParentChkId = objParentDiv.id.replace("Nodes","CheckBox");
var objParentCheckBox = document.getElementById(objParentChkId);
if(objParentCheckBox){
objParentCheckBox.checked = chkstate;
setParentCheckeState(objParentDiv,chkstate);
}
}
}
catch(e){}
}
//设置子节点
function setChildCheckState(nodeid,chkstate)
{
var node = document.getElementById(nodeid);
if(node){
var chks = node.getElementsByTagName("INPUT");
for(var i=0;i<chks.length;i++){
chks[i].checked = chkstate;
}
}
}
function client_OnTreeNodeChecked(event)
{
var TreeNode = event.srcElement || event.target ;
//这是加CheckBox的,改成TreeNode.type == "img "
if (TreeNode.tagName == "INPUT " && TreeNode.type == "checkbox ")
{
if(TreeNode.checked)
{
var checkTitle = TreeNode.title;
alert(checkTitle);
}
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TreeView ID="TreeView1" ExpandDepth="1" PopulateNodesFromClient="true"
OnTreeNodePopulate="TreeView1_TreeNodePopulate" ShowLines="true" ShowExpandCollapse="true"
runat="server">
</asp:TreeView>
<input id="Hidden1" type="hidden" runat="server" />
<asp:Button ID="Button1" runat="server" Text="Button"
onclick="Button1_Click" />
</div>
</form>
</body>
</html>
后台
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
PopulateRootLevel();
TreeView1.Attributes.Add("onclick", "CheckEvent(event)");
}
private void PopulateRootLevel()
{
DataTable dt = SqlHelper.dataTable("SELECT * FROM tb_classtype where fid=0");
PopulateNodes(dt, TreeView1.Nodes);
}
private void PopulateSubLevel(int parentid, TreeNode parentNode)
{
DataTable dt = SqlHelper.dataTable("SELECT * FROM tb_classtype where fid=" + parentid + "");
PopulateNodes(dt, parentNode.ChildNodes);
}
protected void TreeView1_TreeNodePopulate(object sender, TreeNodeEventArgs e)
{
PopulateSubLevel(Convert.ToInt32(e.Node.Value), e.Node);
}
string strurl = SqlHelper.ExecuteScalar("SELECT focusdata from tb_Customer where id=1 ").ToString();
private void PopulateNodes(DataTable dt, TreeNodeCollection nodes)
{
foreach (DataRow dr in dt.Rows)
{
TreeNode tn = new TreeNode();
tn.Text = dr["typename"].ToString();
tn.Value = dr["id"].ToString();
tn.ShowCheckBox = true;
nodes.Add(tn);
tn.PopulateOnDemand = true;
tn.SelectAction = TreeNodeSelectAction.Expand;
if (strurl.Length <= 0) continue;
foreach (var item in strurl.Split(','))
{
if (tn.Value == item)
tn.Checked = true;
}
}
}
private void CheckBox(TreeNode tnSelect)
{
if (TreeView1.CheckedNodes.Count > 0)
{
if (tnSelect.Checked)
{
for (int i = 0; i < tnSelect.ChildNodes.Count; i++)
{
TreeNode tnSelected = tnSelect.ChildNodes[i];
tnSelected.Checked = true;
CheckBox(tnSelected);
}
}
else
{
for (int i = 0; i < tnSelect.ChildNodes.Count; i++)
{
TreeNode tnSelected = tnSelect.ChildNodes[i];
tnSelected.Checked = false;
CheckBox(tnSelected);
}
}
}
}
protected void TreeView1_TreeNodeCheckChanged(object sender, TreeNodeEventArgs e)
{
CheckBox(e.Node);
}
protected void Button1_Click(object sender, EventArgs e)
{
string strSelect = TreeChecked(TreeView1.Nodes);
string strsql = "update tb_Customer set focusdata='" + strSelect + "' where id=1";
SqlHelper.ExecuteNonQuery(strsql);
}
public string chkString = "";
private string TreeChecked(TreeNodeCollection nodeschk)
{
foreach (TreeNode td in nodeschk)
{
if (td.Checked)
{
chkString += td.Value + ",";
}
if (td.ChildNodes.Count > 0)
TreeChecked(td.ChildNodes);
}
return chkString;
}
}
}
