listview中的checkbox
在listview表头中有个checkbox，当选中时候激发事件，就向普通的checkbox不在listview表头中就会激发checkbox_change事件一样，在listview表头中的checkbox选中时候应该激发什么事件，有的说是激发itemchecked事件，但是在asp.net的webform中没有这个事件啊，前台后台怎么写，各位大哥，小弟先谢了
[解决办法]
前台代码：
<script type="text/javascript">
var getFocus = function (elem) {
elem.select();
}
function OnTreeNodeChecked() {
var element = element = window.event.srcElement;
if (!IsCheckBox(element))
return;
var isChecked = element.checked;
var tree = TV2_GetTreeById("tvwCategory");
var node = TV2_GetNode(tree, element);
TV2_SetChildNodesCheckStatus(node, isChecked);
var parent = TV2_GetParentNode(tree, node);
TV2_NodeOnChildNodeCheckedChanged(tree, parent, isChecked);
}
//set child nodes checkbox status
function TV2_SetChildNodesCheckStatus(node, isChecked) {
var childNodes = TV2i_GetChildNodesDiv(node);
if (childNodes == null)
return;
var inputs = WebForm_GetElementsByTagName(childNodes, "INPUT");
if (inputs == null || inputs.length == 0)
return;
for (var i = 0; i < inputs.length; i++) {
if (IsCheckBox(inputs[i]))
inputs[i].checked = isChecked;
}
}
//change parent node checkbox status after child node changed
function TV2_NodeOnChildNodeCheckedChanged(tree, node, isChecked) {
if (node == null)
return;
var childNodes = TV2_GetChildNodes(tree, node);
if (childNodes == null || childNodes.length == 0)
return;
var isAllSame = true;
for (var i = 0; i < childNodes.length; i++) {
var item = childNodes[i];
var value = TV2_NodeGetChecked(item);
if (isChecked != value) {
isAllSame = false;
break;
}
}
var parent = TV2_GetParentNode(tree, node);
if (isAllSame) {
TV2_NodeSetChecked(node, isChecked);
TV2_NodeOnChildNodeCheckedChanged(tree, parent, isChecked);
}
else {
TV2_NodeSetChecked(node, false);
TV2_NodeOnChildNodeCheckedChanged(tree, parent, false);
}
}
//get node relative element(etc. checkbox)
function TV2_GetNode(tree, element) {
var id = element.id.replace(tree.id, "");
id = id.toLowerCase().replace(element.type, "");
id = tree.id + id;
var node = document.getElementById(id);
if (node == null) //leaf node, no "A" node
return element;
return node;
}
//get parent node
function TV2_GetParentNode(tree, node) {
var div = WebForm_GetParentByTagName(node, "DIV");
//The structure of node: <table>information of node</table><div>child nodes</div>
var table = div.previousSibling;
if (table == null)
return null;
return TV2i_GetNodeInElement(tree, table);
}
//get child nodes array
function TV2_GetChildNodes(tree, node) {
if (TV2_NodeIsLeaf(node))
return null;
var children = new Array();
var div = TV2i_GetChildNodesDiv(node);
var index = 0;
for (var i = 0; i < div.childNodes.length; i++) {
var element = div.childNodes[i];
if (element.tagName != "TABLE")
continue;
var child = TV2i_GetNodeInElement(tree, element);
if (child != null)
children[index++] = child;
}
return children;
}
function TV2_NodeIsLeaf(node) {
return !(node.tagName == "A"); //Todo
}
function TV2_NodeGetChecked(node) {
var checkbox = TV2i_NodeGetCheckBox(node);
return checkbox.checked;
}
function TV2_NodeSetChecked(node, isChecked) {
var checkbox = TV2i_NodeGetCheckBox(node);
if (checkbox != null)
checkbox.checked = isChecked;
}
function IsCheckBox(element) {
if (element == null)
return false;
return (element.tagName == "INPUT" && element.type.toLowerCase() == "checkbox");
}
//get tree
function TV2_GetTreeById(id) {
return document.getElementById(id);
}
//get div contains child nodes
function TV2i_GetChildNodesDiv(node) {
if (TV2_NodeIsLeaf(node))
return null;
var childNodsDivId = node.id + "Nodes";
return document.getElementById(childNodsDivId);
}
//find node in element
function TV2i_GetNodeInElement(tree, element) {
var node = TV2i_GetNodeInElementA(tree, element);
if (node == null) {
node = TV2i_GetNodeInElementInput(tree, element);
}
return node;
}
//find "A" node
function TV2i_GetNodeInElementA(tree, element) {
var as = WebForm_GetElementsByTagName(element, "A");
if (as == null || as.length == 0)
return null;
var regexp = new RegExp("^" + tree.id + "n\\d+$");
for (var i = 0; i < as.length; i++) {
if (as[i].id.match(regexp)) {
return as[i];
}
}
return null;
}
//find "INPUT" node
function TV2i_GetNodeInElementInput(tree, element) {
var as = WebForm_GetElementsByTagName(element, "INPUT");
if (as == null || as.length == 0)
return null;
var regexp = new RegExp("^" + tree.id + "n\\d+");
for (var i = 0; i < as.length; i++) {
if (as[i].id.match(regexp)) {
return as[i];
}
}
return null;
}
//get checkbox of node
function TV2i_NodeGetCheckBox(node) {
if (IsCheckBox(node))
return node;
var id = node.id + "CheckBox";
return document.getElementById(id);
}
</script>
</head>
<body>
<form id="form1" runat="server" target="frameContent">
<div id="hid">
<asp:HiddenField ID="hide" runat="server" />
<asp:TreeView ID="tvwCategory" runat="server" Height="85%" Width="400px" ShowLines="True"
OnClick="OnTreeNodeChecked(this)">
<Nodes>
<asp:TreeNode ShowCheckBox="True" Text="新建节点" Value="新建节点">
<asp:TreeNode ShowCheckBox="True" Text="新建节点" Value="新建节点">
<asp:TreeNode ShowCheckBox="True" Text="新建节点" Value="新建节点">
<asp:TreeNode ShowCheckBox="True" Text="新建节点" Value="新建节点" Expanded="False"></asp:TreeNode>
</asp:TreeNode>
<asp:TreeNode ShowCheckBox="True" Text="新建节点" Value="新建节点">
<asp:TreeNode ShowCheckBox="True" Text="新建节点" Value="新建节点" Expanded="False"></asp:TreeNode>
<asp:TreeNode ShowCheckBox="True" Text="新建节点" Value="新建节点" Expanded="False"></asp:TreeNode>
</asp:TreeNode>
</asp:TreeNode>
</asp:TreeNode>
</Nodes>
<NodeStyle ImageUrl="~/Resource/images/fatcow_145.png" />
<ParentNodeStyle ImageUrl="~/Resource/images/fatcow_145.png" />
<RootNodeStyle ImageUrl="~/Resource/images/fatcow_217.png" />
</asp:TreeView>
</div>
</form>
</body>
</html>
[解决办法]
代码写的好乱...
