javascript实现的checkbox选中方法的代码如下:
<script language="javascript" type="text/javascript">
function postBackByObject()
{
var element = window.event.srcElement;
if(window.event.button==0)
if (!IsCheckBox(element))
return;
var isChecked = element.checked;
var tree = TV2_GetTreeById("TreeView");
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(tree,node,isChecked);
TV2_NodeOnChildNodeCheckedChanged(tree,parent,isChecked);
}
else
{
TV2_NodeSetChecked(tree,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;
}
//判断:只要该节点有一个字节点被选中,则该节点一定被选中
function TV2_NodeSetChecked(tree,node,isChecked)
{
var checkbox = TV2i_NodeGetCheckBox(node);
if(checkbox != null)
{
var childNodes = TV2_GetChildNodes(tree,node);
for(var i = 0; i < childNodes.length; i++)
{
var item = childNodes[i];
var value = TV2_NodeGetChecked(item);
if(value)
{
isChecked = true ;
break;
}
}
checkbox.checked = isChecked;
}
}
function IsCheckBox(element)
{
if(element == null)
return false;
return (element.tagName == "INPUT" && element.type.toLowerCase() == "checkbox");
}
function Isselectnode(element)
{
if(element == null)
return false;
return (element.tagName == "A" && element.class =="TreeView_0" );
}
//get tree
function TV2_GetTreeById(id)
{
return document.getElementById(id);
}
//////////////////////////////////////////////////////////////////////////////////////////////
//private mothods, with TV2i_ prefix
//////////////////////////////////////////////////////////////////////////////////////////////
//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);
}
function SelectType_onchange() {
if(SelectType.options(0).Text == "Calico")
;
}
</script>
服务器端代码
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
TreeView.Attributes.Add("onclick", "postBackByObject()");
if (Request.QueryString["BARCODE"] != null)
{
barcode = Request.QueryString["BARCODE"].ToString();
//判断是否是自己发起的任务
//disabledButton(Rid);
Bind();
}
if (Request.QueryString["flag"] != null)
{
if (Request.QueryString["flag"].ToString() == "1")
{
VisibleBtn();
}
}
}
}