Question

C#里面treeview中，用JavaScript怎么得到的选中子节点的父节点，并且把父节点选中

每个节点前面有个checkBox，我想实现选中子节点时，自动选中父节点。
我只实现了取消父节点时，就取消所有子节点.这是我的代码，请大家看看。因为好久没有来百度了，没有积分了，抱歉了，大家，谢谢大家
var objchild = divID.children;
var count = objchild.length;

for(var i=0;i<objchild.length;i++)
{
var tempObj = objchild[i];
if(tempObj.tagName=="INPUT" && tempObj.type == "checkbox")
{
tempObj.checked = T;
}
setChildChecked(tempObj,T,false);
}

Answer 1

<script language="javascript" type="text/javascript">
function HandleCheckbox()
{
var element = event.srcElement;
if (element.tagName == "INPUT" && element.type == "checkbox")
{
var checkedState = element.checked;
while (element.tagName != "TABLE") // Get wrapping table
{
element = element.parentElement;
}
var parentElement = element;

if(checkedState)
{
CheckParents(element);
}

element = element.nextSibling; //element.tagName = DIV

if (element != null) // If no childrens then exit
{
var childTables = element.getElementsByTagName("TABLE");

for (var tableIndex = 0; tableIndex < childTables.length; tableIndex++)
{
CheckTable(childTables[tableIndex], checkedState);
}
}
if(checkedState == false)
{
UnCheckParents(parentElement);
}

}
}

// Uncheck the parents of the given table, Can remove the recurse (redundant)
function CheckParents(table)
{
if (table == null || table.rows[0].cells.length == 2) // This is the root
{
return;
}
var parentTable = table.parentElement.previousSibling;
CheckTable(parentTable, true);
CheckParents(parentTable);
}

// Check the parents of the given table, Can remove the recurse (redundant)
function UnCheckParents(table)
{

if (table == null || table.rows[0].cells.length == 2) // This is the root
{
return;
}
var parentTable = table.parentElement.previousSibling;

var checkedCount =GetCheckedCount(table.parentElement);
if(checkedCount == 0)
{
CheckTable(parentTable, false);
}
UnCheckParents(parentTable);
}

// Handle the set of checkbox checked state
function CheckTable(table, checked)
{
var checkboxIndex = table.rows[0].cells.length - 1;
var cell = table.rows[0].cells[checkboxIndex];
var checkboxes = cell.getElementsByTagName("INPUT");
if (checkboxes.length == 1)
{
checkboxes[0].checked = checked;
}

}
//Get checked children count
function GetCheckedCount(table)
{
var checkedCount = 0;
var element = table.nextSibling;
var childTable = table.getElementsByTagName("TABLE");

for(var tableIndex = 0;tableIndex < childTable.length; tableIndex++)
{
var childTables = childTable[tableIndex];
var checkboxIndex = childTables.rows[0].cells.length - 1;
var cell = childTables.rows[0].cells[checkboxIndex];
var checkboxes = cell.getElementsByTagName("INPUT");
if (checkboxes.length == 1 && checkboxes[0].checked == true)
{
checkedCount++;
}
}
return checkedCount;
}
</script>

<asp:TreeView ID="roles" onclick="HandleCheckbox();" runat="server" ShowCheckBoxes="All"
CssClass="noborder" Height="150px" Width="350px" ExpandDepth="1">
</asp:TreeView>