我正在使用TreeView控件。使用复选框从数据库绑定值。
将近三个孩子的父节点就像
一样Parent1
child1
child2
child3
Parent2
child1
child2
child3
我能够绑定来自3个表的数据都运行良好。当父节点检查所有相应的子节点时,我想要一个设施自动检查。如果我点击父节点1,则检查子节点123。如果我检查child1,则检查child2和child3。如果我检查孩子2所有孩子3项检查。怎么做?
先谢谢 Amrutha
答案 0 :(得分:2)
如果检查了父节点,则下面的javascript函数可用于检查所有子节点,如果至少检查了一个子节点,则检查父节点,否则取消选中它:
function OnTreeClick(evt) {
var src = window.event != window.undefined ? window.event.srcElement : evt.target;
var isChkBoxClick = (src.tagName.toLowerCase() == "input" && src.type == "checkbox");
var t = GetParentByTagName("table", src);
if (isChkBoxClick) {
var parentTable = GetParentByTagName("table", src);
var nxtSibling = parentTable.nextSibling;
if (nxtSibling && nxtSibling.nodeType == 1) {
if (nxtSibling.tagName.toLowerCase() == "div") {
CheckUncheckChildren(parentTable.nextSibling, src.checked);
}
}
CheckUncheckParents(src, src.checked);
}
}
function CheckUncheckChildren(childContainer, check) {
var childChkBoxes = childContainer.getElementsByTagName("input");
var childChkBoxCount = childChkBoxes.length;
for (var i = 0; i < childChkBoxCount; i++) {
childChkBoxes[i].checked = check;
}
}
function CheckUncheckParents(srcChild, check) {
var parentDiv = GetParentByTagName("div", srcChild);
var parentNodeTable = parentDiv.previousSibling;
if (parentNodeTable) {
var checkUncheckSwitch;
var isAllSiblingsChecked = AreAllSiblingsChecked(srcChild);
if (isAllSiblingsChecked) {
checkUncheckSwitch = true;
}
else {
checkUncheckSwitch = false;
}
var inpElemsInParentTable = parentNodeTable.getElementsByTagName("input");
if (inpElemsInParentTable.length > 0) {
var parentNodeChkBox = inpElemsInParentTable[0];
parentNodeChkBox.checked = checkUncheckSwitch;
CheckUncheckParents(parentNodeChkBox, checkUncheckSwitch);
}
}
}
function AreAllSiblingsChecked(chkBox) {
var parentDiv = GetParentByTagName("div", chkBox);
var childCount = parentDiv.childNodes.length;
var k = 0;
for (var i = 0; i < childCount; i++) {
if (parentDiv.childNodes[i].nodeType == 1) {
if (parentDiv.childNodes[i].tagName.toLowerCase() == "table") {
var prevChkBox = parentDiv.childNodes[i].getElementsByTagName("input")[0];
//if any of sibling nodes are not checked, return false
if (prevChkBox.checked) {
//add each selected node one value
k = k + 1;
}
}
}
}
//Finally check any one of child node is select if selected yes then return ture parent node check
if (k > 0) {
return true;
}
else {
return false;
}
}
function GetParentByTagName(parentTagName, childElementObj) {
var parent = childElementObj.parentNode;
while (parent.tagName.toLowerCase() != parentTagName.toLowerCase()) {
parent = parent.parentNode;
}
return parent;
}
我用这个javascript解决了我的问题。
答案 1 :(得分:0)
一个简单的递归函数可以做到这一点。
private bool checkTreeNodes(TreeNodeCollection nodes, bool parentChecked)
{
var isChecked = parentChecked;
foreach (TreeNode node in nodes)
{
if (node.Checked || parentChecked)
{
checkTreeNodes(node.Nodes, true);
node.Checked = true;
isChecked = true;
}
else
{
node.Checked = checkTreeNodes(node.Nodes, false);
isChecked = isChecked || node.Checked;
}
}
return isChecked;
}
使用它像:
checkTreeNodes(myTree.Nodes, false);