treeview怎么使用?解释清楚立刻给分

Question

treeview怎么使用?解释清楚立刻给分

Answer 1

详细查看
http://blog.csdn.net/kingwkb/archive/2006/01/25/588389.aspx

Answer 2

private void BuildTree()
{
int i = 0;
int j = 0;
Guid ParentID = Guid.Empty;

TreeNode oTNode = new TreeNode();
oTNode.Type = "AddrTypes";
oTNode.Text = SetLanguage();

Hashtable tblNodes = new Hashtable(); ///build a list of Nodes, Key=ClassID, Value=Index
TreeNode oNode;
string[] orderBy = {"VendorCode", "VendorName"};
e2PrintDALC.VendorTypeCollection oVendorTypes = e2PrintDALC.VendorType.LoadCollection(orderBy, true);

///loop throught the Class table to build the Nodes and the List
TreeNode[] oNodes = new TreeNode[oVendorTypes.Count]; ///build an array of Nodes to hold all AddrTypes
foreach (e2PrintDALC.VendorType oVendorType in oVendorTypes)
{
oNode = new TreeNode();
oNode.Type = oVendorType.VendorTypeId.ToString();
oNode.Text = oVendorType.VendorCode;
oNode.NavigateUrl = "VendorType_PaneCenter.aspx?act=show&id=" + oVendorType.VendorTypeId.ToString();
oNode.Target = "fraPaneCenter";
oNodes[i] = oNode;
tblNodes.Add(oVendorType.VendorTypeId.ToString(), i);
++i;
}

///loop throught the Class table again to put the Nodes into proper hirearchy position
foreach (e2PrintDALC.VendorType oVendorType in oVendorTypes)
{
i = (int) tblNodes[oVendorType.VendorTypeId.ToString()];
ParentID = oVendorType.ParentVendorType;

if (tblNodes[ParentID.ToString()] == null)
{
j = 0;
}
else
{
j = (int) tblNodes[ParentID.ToString()];
} if (ParentID != Guid.Empty)
{
oNodes[j].Nodes.Add(oNodes[i]);
}
}

///loop throught the Class table again to put the Top Nodes into TreeView
foreach (e2PrintDALC.VendorType oVendorType in oVendorTypes)
{
i = (int) tblNodes[oVendorType.VendorTypeId.ToString()];
ParentID = oVendorType.ParentVendorType;

if (ParentID == Guid.Empty)
{
if (oNodes[i] != null) oTNode.Nodes.Add(oNodes[i]);
}
}
tvwTemplateTree.Nodes.Add(oTNode);
}

Answer 3

他是按照一个一个的节点的添加，然后可以相应的选择不同的节点进行不同的操作，就像csdn一样，左侧是一个树，右侧是一个grid页，根据节点的data不同，进行不同的操作

Answer 4

到这里看看吧，当初我就是从这里学会的：）
http://dev.csdn.net/article/73/73452.shtm

Answer 5

再推荐一个：http://www.drlzf.com/DogNet/ASP/200411/89.html

Answer 6

pageload中：
TreeView1.Nodes.Clear();
int li_len;
tree_str[] tvparent;  //调用struct tree_str
tvparent=new tree_str[1000];
li_len=0; string s_sql_1="select  qymc  from cq_zycqdjb  where  bsm='"+bsm.Text.ToString()+"'";
OracleCommand myCommand1=new OracleCommand(s_sql_1,myConnection);
OracleDataReader objDataReader1=myCommand1.ExecuteReader();
lal_1=new ArrayList();
while (objDataReader1.Read())
{
li_len++;
tvparent[li_len - 1].frame=1;   //frame 结构变量
tvparent[li_len - 1].tv=new TreeNode();
tvparent[li_len - 1].tv.Text=objDataReader1["qymc"].ToString()+"[]";
// lal_1.Add(objDataReader1["qymc"].ToString());
get_child_1(tvparent[li_len - 1]);
TreeView1.Nodes.Add(tvparent[li_len - 1].tv);   //tv  结构变量
}
ViewState["treeview1"]=lal_1;   //把TreeView1的值放在ArrayList lal_1里
DataSet myData1=new DataSet();
myCommand1.Dispose();
objDataReader1.Close();
然后再做三个函数
1.
private void GetAllNodeText(TreeNodeCollection tnc)  //递归算法
{
foreach(TreeNode tv in tnc)
{

if(tv.Nodes.Count!=0)
GetAllNodeText(tv.Nodes);
// Response.Write(tv.NodeData.ToString());
// Response.Write(tv.Nodes.ToString());
}

}
2.
public void get_child(tree_str tv_now)  //逐层找child
{
TreeNode tn=tv_now.tv;
            string ls_text=tn.Text.ToString().Substring(0,tn.Text.LastIndexOf("["));
//   string ls_text=tn.Text.ToString();
// Response.Write(ls_text); string ls_parent="";
TreeNode tn_parent=(TreeNode)tn.Parent;
if(tn_parent!=null) ls_parent=tn_parent.Text.Substring(0,tn_parent.Text.LastIndexOf("["));
// if(tn_parent!=null) ls_parent=tn_parent.Text;
string ls_sql_1=""; tree_str tv_child=new tree_str();
   ls_sql_1="select  distinct czrmc,tzje  from cq_zyczrb where  bsm=(select bsm  from  cq_zycqdjb where qymc='"+ls_text+"')";  //在where语句中使用select
OracleConnection myConnection=new OracleConnection(ConfigurationSettings.AppSettings["ConnectionString"]);
myConnection.Open();
OracleCommand myCommand1=new OracleCommand(ls_sql_1,myConnection);
OracleDataReader objDataReader1=myCommand1.ExecuteReader();
while (objDataReader1.Read())
{
                string ls_ctext=objDataReader1[0].ToString();
// Response.Write(ls_ctext);
string ls_sql_1a="";
ls_sql_1a="select tzje  from cq_zyczrb  where   czrmc='"+ls_ctext+"' and  bsm=(select bsm  from  cq_zycqdjb where qymc='"+ls_text+"') ";
OracleConnection myConnection1=new OracleConnection(ConfigurationSettings.AppSettings["ConnectionString"]);
myConnection1.Open();
OracleCommand myCommand1a=new OracleCommand(ls_sql_1a,myConnection1);
OracleDataReader objDataReader1a=myCommand1a.ExecuteReader();
while(objDataReader1a.Read())
{
string tzje=objDataReader1a[0].ToString();
// Response.Write(tzje);
string ls_sql_1b="";
ls_sql_1b="select gqbl  from cq_zyczrb  where   czrmc='"+ls_ctext+"' and  bsm=(select bsm  from  cq_zycqdjb where qymc='"+ls_text+"') ";
OracleConnection myConnection2=new OracleConnection(ConfigurationSettings.AppSettings["ConnectionString"]);
myConnection2.Open();
OracleCommand myCommand1b=new OracleCommand(ls_sql_1b,myConnection2);
OracleDataReader objDataReader1b=myCommand1b.ExecuteReader();
while(objDataReader1b.Read())
{
string  gqbl=objDataReader1b[0].ToString();
// Response.Write(gqbl);
if(ls_ctext==ls_parent) continue;
tv_child.frame=tv_now.frame+1;
tv_child.tv=new TreeNode();
string ls_ctext_1=ls_ctext+"[投资金额："+tzje+"股权比例："+gqbl+"%"+"]";                        ls_ctext=ls_ctext_1.Substring(0,ls_ctext_1.LastIndexOf("["));
// Response.Write(ls_ctext);
tv_child.tv.Text=ls_ctext_1;
tv_now.tv.Nodes.Add(tv_child.tv);
lal_1.Add(ls_ctext);
get_child_1(tv_child);     //递归
// Response.Write("tv_child.tv.Text.Substring(0,ls_ctext_1.LastIndexOf("[")");
   
}
myCommand1b.Dispose();
objDataReader1b.Dispose();
myConnection2.Close();
}
myCommand1a.Dispose();
objDataReader1a.Dispose();
myConnection1.Close();
}
myCommand1.Dispose();
objDataReader1.Close();
myConnection.Close();
}
3.
private void expand(TreeNode tv)  //展开所有的父节点
{
if(tv.Nodes.Count>0)
{
tv.Expanded=true;
foreach(TreeNode tempNode in tv.Nodes)
{
expand(tempNode);
}
}
}

Answer 7

http://time-is-life.cnblogs.com/articles/329691.html