ASP.NET 2.0 Treeview Checkboxes - Check All - Javascript

在页面加入该函数
    <script language="javascript">
        <!--
           function client_OnTreeNodeChecked()
        {
        var obj = window.event.srcElement;
        var treeNodeFound = false;
        var checkedState;
        if (obj.tagName == "INPUT" && obj.type == "checkbox") {
        var treeNode = obj;
        checkedState = treeNode.checked;
        do
        {
        obj = obj.parentElement;
        } while (obj.tagName != "TABLE")
        var parentTreeLevel = obj.rows[0].cells.length;
        var parentTreeNode = obj.rows[0].cells[0];
        var tables = obj.parentElement.getElementsByTagName("TABLE");
        var numTables = tables.length
        if (numTables >= 1)
        {
        for (i=0; i < numTables; i++)
        {
        if (tables[i] == obj)
        {
        treeNodeFound = true;
        i++;
        if (i == numTables)
        {
        return;
        }
        }
        if (treeNodeFound == true)
        {
        var childTreeLevel = tables[i].rows[0].cells.length;
        if (childTreeLevel > parentTreeLevel)
        {
        var cell = tables[i].rows[0].cells[childTreeLevel - 1];
        var inputs = cell.getElementsByTagName("INPUT");
        inputs[0].checked = checkedState;
        }
        else
        {
        return;
        }
        }
        }
        }
        }
        }

//-->
</script>
在   <asp:TreeView ID="TreeView1" runat="server"  onclick="client_OnTreeNodeChecked();"
            ShowCheckBoxes="All" >
用onclick事件调用该函数即可实现复选框与下级复选框状态保持一致。