gridview问题！

[Project与项目管理]

大家好，请问有没有知道如何用Gridview,或者其他数据库控件做出一个有树状扩展功能的并且是多列的视图出来呢？简单地说就是能显示多列数据的Treeview或者是带有TREEview功能的grid

[liuping234232783]

public partial class left : System.Web.UI.Page
{
//验证用户名及绑定Tree父类;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
if (Session["username"] == null)
{
Response.Write("<script language=javascript>window.top.location=\"default.aspx\";</script>");

}
else
{
DataView dv = drv("select * from menuctl where parentid='0'");

foreach (DataRowView datav in dv)
{
TreeNode tn = new TreeNode();

tn.Text = datav["cname"].ToString();

tn.Value = datav["nodeid"].ToString();

tn.Expanded = false;

tn.SelectAction = TreeNodeSelectAction.Expand;

TreeView1.Nodes.Add(tn);

addchildnode(tn);
}
}
}
}
//绑定子类及超连接;
private void addchildnode(TreeNode tn)
{
int bid = Convert.ToInt32(tn.Value);

DataView dv = drv("select * from menuctl where parentid='"+bid+"'");

foreach (DataRowView datav in dv)
{
TreeNode ctn = new TreeNode();

ctn.Text = datav["cname"].ToString();

ctn.Value = datav["nodeid"].ToString();

ctn.NavigateUrl = datav["url"].ToString();

ctn.Target = "rform";

tn.ChildNodes.Add(ctn);
}
}
//Tree数据源;
private DataView drv(string query)
{
SqlConnection pr = new SqlConnection(ConfigurationManager.ConnectionStrings["mycon"].ToString());

pr.Open();

SqlDataAdapter sda = new SqlDataAdapter(query,pr);

DataSet ds = new DataSet();

sda.Fill(ds, "tree");

pr.Close();

return ds.Tables["tree"].DefaultView;
}
//获取子类信息;
protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e)
{
string a = TreeView1.SelectedNode.Value.ToString();

Response.Write(a);

}

[Project与项目管理]

这是不是只能展示出一个节点数据，如果能显示出多列数据就好了，树控件的缺点就是只能显示单节点数据！

[pdsnet]

帮顶~