一个节点都是checkbox的treeview如何使某一个节点选中后其子节点都自动默认选中？

Question

把一个treeview的checkboxs属性设为true使其节点都变成checkbox之后，想实现使某一个节点选中后其子节点都自动默认选中该怎么做呢？大家帮忙，谢谢拉！！

Answer 1

private void treeView1_AfterCheck(object sender, TreeViewEventArgs e)
        {
            foreach (System.Windows.Forms.TreeNode node in e.Node.Nodes)
            {
                node.Checked = e.Node.Checked;
            }
        }

Answer 2

private void treeView1_AfterCheck(object sender, TreeViewEventArgs e)
        {
            foreach (System.Windows.Forms.TreeNode node in e.Node.Nodes)
            {
                node.Checked = true;
            }
        }

Answer 3

<script language ="javascript" type="text/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>
.cs代码
TreeView1.Attributes.Add("onclick", "return client_OnTreeNodeChecked();");

Answer 4

private void treeView1_AfterChec(objectsender,
                                  System.Windows.Forms.TreeViewEventArgs e)
{
        //遍历选种节点的集合                  
      foreach (TreeNode node in e.Node.Nodes)
      {
         //选种状态取非
node.Checked = !node.Checked;
      }
}

Answer 5

思路://规则1：取消选定
//规则1.1：检查是否有子节点，需清除所有子节点的选定状态；
//规则1.2：检查是否有父节点，如有，则根据兄弟节点的选定状态修改父节点的选定状态
//规则2：选定
//规则2.1：检查是否有子节点，设置所有子节点为选定状态
//规则2.2：检查是否有父节点，如有，则根据兄弟节点的选定状态修改父节点的选定状态可参看
http://blog.csdn.net/am2004/archive/2007/05/22/1621349.aspx