本文实例讲述了asp.net TreeView递归循环子节点生成树形菜单的方法。分享给大家供大家参考,具体如下:
这里主要用到递归循环获取子结点
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/// <summary>
/// 生成根节点
/// </summary>
/// <param name="treeview"></param>
protected void BindTreeView( long ID, TreeView treeview)
{
DataTable dt = menuLogic.GetMenu2(ID, User.Identity.Name);
treeview.Nodes.Clear();
DataRow[] parentrow = dt.Select( "par_id=0" );
for ( int i = 0; i < parentrow.Length; i++)
{
TreeNode rootnode = new TreeNode();
rootnode.Text = parentrow[i][ "node_name" ].ToString(); //parentrow[i][3].ToString();
rootnode.Value = parentrow[i][ "ID" ].ToString(); //parentrow[i][1].ToString(); 主键
rootnode.Expanded = true ;
rootnode.Selected = false ;
rootnode.SelectAction = TreeNodeSelectAction.None;
treeview.Nodes.Add(rootnode);
CreateChildNode(rootnode, dt); //
}
}
/// <summary>
/// 生成子节点
/// </summary>
/// <param name="parentNode"></param>
/// <param name="datatable"></param>
protected void CreateChildNode(TreeNode parentNode, DataTable datatable)
{
DataRow[] rowlist = datatable.Select( "par_id=" + parentNode.Value);
for ( int i = 0; i < rowlist.Length; i++)
{
TreeNode node = new TreeNode();
if (datatable.Select( "par_id=" + rowlist[i][ "ID" ].ToString().Trim()).Length > 0)
{
node.Text = rowlist[i][ "node_name" ].ToString();
node.Value = rowlist[i][ "ID" ].ToString();
}
else
{
node.Text = "<a href=\"javascript:;\" onclick=\"OpenUrl('" + rowlist[i][ "url" ].ToString().Trim() + "',this)\">" + rowlist[i][ "node_name" ].ToString() + "</a>" ;
node.Value = rowlist[i][ "ID" ].ToString();
}
node.Expanded = false ;
node.Selected = false ;
node.SelectAction = TreeNodeSelectAction.None;
parentNode.ChildNodes.Add(node);
CreateChildNode(node, datatable); //递归调用
}
}
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希望本文所述对大家asp.net程序设计有所帮助。