}
dr.Close ();

}

private void TreeView1_SelectedIndexChange(object sender,
Microsoft.Web.UI.WebControls.TreeViewSelectEventArgs e)
{
TreeNode NewNode=TreeView1.GetNodeFromIndex
(TreeView1.SelectedNodeIndex);
string strNodeId=NewNode.ID .ToString ();
SqlDataReader dr;
SqlCommand myCommand;
int intVOrderLen=strNodeId.Length+2;
string strSel = "select * from bas_enterprise where
len(vieworder)="+intVOrderLen+" and vieworder like '%"+strNodeId+"__%'
order by vieworder";
myCommand = new SqlCommand (strSel, myConnection);
dr=myCommand.ExecuteReader();
NewNode.Nodes .Clear();
while (dr.Read ())
{
TreeNode pNode=new TreeNode ();
pNode.Text =dr["EntpName"].ToString ();
pNode.ID =dr["ViewOrder"].ToString ();
NewNode.Nodes.Add (pNode);
}
dr.Close ();
TreeView1.ExpandLevel=1;
}

8、在treeview中如何查找一个值，并选中它？

问题:
各位，在已经建好的树中如何查找一个文本或者是treenodes的id，找到后选中它？

答案:
for(int i=0;i<TreeView1.Nodes.Count;i++)
if(TreeView1.Nodes[i]==TextBox1.Text)
{
string index1=TreeView1.Nodes[i].GetNodeIndex();//取得index
TreeView1.SelectedNodeIndex=index1;
　　　 }

9、如何取得TreeView中各项的值？？

private void TreeView1_SelectedIndexChange(object sender,
Microsoft.Web.UI.WebControls.TreeViewSelectEventArgs e)
{
Microsoft.Web.UI.WebControls.TreeNode
NewNode=TreeView1.GetNodeFromIndex(TreeView1.SelectedNodeIndex);
Label1.Text =NewNo

如果通过代码要在父结点中增加子节点,代码如何实现?
父节点代码如下:
TreeNode pNode = new TreeNode();
pNode.ID = "Root";
pNode.Text = strNodeName;
TreeView1.Nodes.Add(pNode);
如果要在根结点"Root"下面再增加子节点,如何写代码?
TreeView1.Nodes.AddAt(pNode);这种方式好象不行.
TreeView1.Nodes[0].Nodes.Add(pNewNode);

/*************.Cs 中的代码****************************

string strScript="<script language=\"javascript\" >";
strScript+=" function GetNode() \n"+"{ \n";
strScript+=" alert(TreeView1.getTreeNode(TreeView1.clickedNodeIndex).getAttribute('Text'));\n" ;
strScript+=" alert(TreeView1.getTreeNode(TreeView1.clickedNodeIndex).getAttribute('CheckBox'));\n";
strScript+=" alert(TreeView1.getTreeNode(TreeView1.clickedNodeIndex).getAttribute('Checked'));\n";
strScript+=" if (TreeView1.getTreeNode(TreeView1.clickedNodeIndex).getAttribute('Checked'))\n";
strScript+=" TreeView1.getTreeNode(TreeView1.clickedNodeIndex).setAttribute('Checked','false');\n";
strScript+=" else \n";
strScript+=" TreeView1.getTreeNode(TreeView1.clickedNodeIndex).setAttribute('Checked','true');\n";
strScript+=" \n } \n";
strScript+="</script>";
if(! this.IsClientScriptBlockRegistered("myjs"))
{
this.RegisterClientScriptBlock("myjs",strScript);
}