Question

c# treeview控件 点击根节点后展开相应的子节点,如何实现

说的详细点,最好能把关键代码写出来

Answer 1

public static string parentid = "";
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
if (parentid != "")
{
TreeNode tn = TreeView1.FindNode(parentid);
tn.ExpandAll();
}
}
}
protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e)
{
parentid = TreeView1.SelectedNode.Parent.ValuePath; //取父节点的路径,用於保存状态,,,展开节点。
}

Answer 2

private System.Windows.Forms.TreeView tv_Demo;//声明
tv_Demo.Click += new System.EventHandler(tv_Demo_Click);/*绑定单击事件*/
//单击事件响应函数
private void tv_Demo_Click(object sender, EventArgs e)
{
string nodeText=tv_Demo.SelectedNode.Text;/*获得子节点的名称*/
}

Answer 3

<asp:TreeNode Expanded="False" SelectAction="Expand" Text="电子刊物" Value="1111d" ImageUrl="~/images/menu/file_folder.gif">
<asp:TreeNode ImageUrl="~/images/menu/file_folder.gif" Text="<a href='MyAffairs/MyElecBook.aspx ' target='rform' onclick='parent.UploadComplete();'>电子刊物浏览</a>" Value="1111d1" SelectAction="None">
</asp:TreeNode>
<asp:TreeNode ImageUrl="~/images/menu/file_folder.gif" Text="<a href='MyAffairs/ElecBook.aspx ' target='rform' onclick='parent.UploadComplete();'>电子刊物管理</a>" Value="1111d2" SelectAction="None">
</asp:TreeNode>
</asp:TreeNode>
看看这个实例对你有帮助没！

Answer 4

响应选择更改事件，调用expand方法