asp.net treeview checkbox 相关问题

private void display()
{
dt = new tsorganize().organizeds();
dataview dv = new dataview(dt);
treenode nodes = new treenode();
nodes.text = "两岸咖啡";
nodes.value = "0";
if (dt.rows.count >= 1)
{
dv.rowfilter = "fparentid=''";
if (dv.count >= 1)
{
foreach (datarowview drrow in dv)
{
treenode nodel = new treenode();
nodel.text = drrow.row["forgname"].tostring();
nodel.value = drrow.row["forgno"].tostring();
nodes.childnodes.add(nodel);
nodelist(dv, nodel, drrow.row["forgno"].tostring());
}
}
}
treevlist.nodes.add(nodes);
}

//生成树
private void nodelist(dataview dv, treenode node, string parentid)
{
dv.rowfilter = "fparentid='" + parentid.tostring() + "'";
if (dv.count >= 1)
{
foreach (datarowview drrow in dv)
{
treenode nodel = new treenode();
nodel.text = drrow.row["forgname"].tostring();
nodel.value = drrow.row["forgno"].tostring();
node.childnodes.add(nodel);
nodelist(dv, nodel, drrow.row["forgno"].tostring());
}
}
}
============================================================
1.
treenodecollection tnc = treevlist.checkednodes;
//获取树中所有选定的节点
private void getchecknode(treenodecollection tnc)
{
foreach (treenode node in tnc)
{
if(node.checked)
{
if (node.childnodes.count == 0)
{
datarow dr = tblselchains.newrow();
dr["forgno"] = node.value;
dr["forgname"] = node.text.tostring();
tblselchains.rows.add(dr);
}
}
}
}

2.根据根据数据库中的值，给相应的节点的checked=true

/// <summary>
///dtploystore ：是表（保存从数据库中读取的数据）
/// <para></para>
/// </summary>
treenodecollection tnc = treevlist.nodes ;
if (dtploystore != null)
{
if (dtploystore.rows.count > 0)
{
for (int i = 0; i < dtploystore.rows.count; i++)
{
getselectedtreenode(tnc, dtploystore.rows[i]["forgno"].tostring());
}
}
}
/// <summary>
/// 遍历门店树，得到选中的节点
/// <para></para>
/// </summary>
/// <param name="tnc"></param>
public void getselectedtreenode(treenodecollection tnc,string checkdata)
{
foreach (treenode node in tnc)
{
if (node.checked)
{
node.checked = true;
break;
}
getselectedtreenode(node.childnodes, checkdata);
}
}

3.javascript实现选中父节点，子节点自动选中
///后台给treeview添加属性
/// this.treevlist.attributes.add("onclick", "ontreenodechecked()");

///下面是在前台javascript中编写的
function ontreenodechecked() {
var ele = window.event.srcelement;
if (ele.type == 'checkbox') {
var childrendivid = ele.id.replace('checkbox', 'nodes');
var div = document.getelementbyid(childrendivid);
if (div == null) return;
var checkboxs = div.getelementsbytagname('input');
for (var i = 0; i < checkboxs.length; i++) {
if (checkboxs[i].type == 'checkbox')
checkboxs[i].checked = ele.checked;
}
}
4.在 treeview上显示checkbox，其实很简单，只要设置 showcheckboxes="all"
如果我们想显示treeviw的设定层，我们可以设置 expanddepth="n" (n为数字，就是你想显示的层数，0为全部层）