TreeView右键菜单实例

最新推荐文章于 2022-02-25 14:21:45 发布

原创最新推荐文章于 2022-02-25 14:21:45 发布 · 637 阅读

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这个示例展示了如何在IEWebControl TreeView中添加一个右键菜单，提供添加、修改和删除节点的功能。通过JavaScript实现菜单的显示、高亮和点击事件处理，以及与TreeView控件交互操作。

一个IEWebControl TreeView右键菜单的例子，实现了添加、修改和删除功能，复制即可运行
更多TreeView的客户端操作参见
http://www.youkuaiyun.com/Develop/read_article.asp?id=22100

<%@ Register TagPrefix="iewc" Namespace="Microsoft.Web.UI.WebControls" Assembly="Microsoft.Web.UI.WebControls, Version=1.0.2.226, Culture=neutral, PublicKeyToken=31bf3856ad364e35" %>

<HTML>

<HEAD>

<title>TreeView控件右键菜单</title>

<style>

<!--

.skin

{

cursor:default;

font:menutext;

position:absolute;

text-align:left;

font-family: Arial, Helvetica, sans-serif;

font-size: 10pt;

width:120px;

background-color:menu;

border:1 solid buttonface;

visibility:hidden;

border:2 outset buttonhighlight;

}

.menuitems

{

padding-left:15px;

padding-right:10px;

}

-->

</style>

</HEAD>

<iewc:TreeView id="TreeView1" runat="server" ExpandLevel="3" HoverStyle="color:blue;background:#ffff00;">

<iewc:TreeNode Text="Node0" Expanded="True">

<iewc:TreeNode Text="Node3">

<iewc:TreeNode Text="Node5"></iewc:TreeNode>

<iewc:TreeNode Text="Node6"></iewc:TreeNode>

</iewc:TreeNode>

<iewc:TreeNode Text="Node4"></iewc:TreeNode>

</iewc:TreeNode>

<iewc:TreeNode Text="Node1" Expanded="True">

<iewc:TreeNode Text="Node7">

<iewc:TreeNode Text="Node8"></iewc:TreeNode>

</iewc:TreeNode>

<iewc:TreeNode Text="Node2" Expanded="True">

<iewc:TreeNode Text="Node9"></iewc:TreeNode>

<iewc:TreeNode Text="Node10">

<iewc:TreeNode Text="Node11"></iewc:TreeNode>

<iewc:TreeNode Text="Node12"></iewc:TreeNode>

</iewc:TreeNode>

</iewc:TreeView>

<hr>

</div>

</form>

var menuskin = "skin";

var node = null;

function hideMenu()

{

popupMenu.style.visibility = "hidden";

}

function highlighItem()

{

if (event.srcElement.className == "menuitems")

{

event.srcElement.style.backgroundColor = "highlight";

event.srcElement.style.color = "white";

}

function lowlightItem()

{

if (event.srcElement.className == "menuitems")

{

event.srcElement.style.backgroundColor = "";

event.srcElement.style.color = "black";

window.status = "";

}

function clickItem()

{

if (event.srcElement.className == "menuitems")

{

if(event.srcElement.getAttribute("func") == "add" && node != null)

{

var newNode=TreeView1.createTreeNode();

newNode.setAttribute("Text","new Node");

node.add(newNode);

}

else if (event.srcElement.getAttribute("func") == "delete" && node != null)

{

node.remove();

}

else if (event.srcElement.getAttribute("func") == "modify" && node != null)

{

node.setAttribute("Text","hgknight");

}

function TreeView1.oncontextmenu()

{

var nodeindex = event.treeNodeIndex;

if (typeof(nodeindex) == "undefined")

{

node = null;

return;

}

node = TreeView1.getTreeNode(nodeindex);

var rightedge = document.body.clientWidth-event.clientX;

var bottomedge = document.body.clientHeight-event.clientY;

if (rightedge <popupMenu.offsetWidth)

{

popupMenu.style.left = document.body.scrollLeft + event.clientX - popupMenu.offsetWidth;

}

else

{

popupMenu.style.left = document.body.scrollLeft + event.clientX;

}

if (bottomedge <popupMenu.offsetHeight)

{

popupMenu.style.top = document.body.scrollTop + event.clientY - popupMenu.offsetHeight;

}

else

{

popupMenu.style.top = document.body.scrollTop + event.clientY;

}

popupMenu.style.visibility = "visible";

return false;

}

</script>

</body>

</HTML>