数据库动态添加treeview的节点

  
    

   
     
   
      1 
   
     数据表:deptTree

   
      2 
   
     

   
      3 
   
     deptId 
   
     int
   
      

   
      4 
   
     

   
      5 
   
     

   
      6 
   
     deptName nvchar 

   
      7 
   
     

   
      8 
   
     

   
      9 
   
     parentId 
   
     int
   
     

   
     10 
   
     

   
     11 
   
     

   
     12 
   
     nodeValue nvchar 

   
     13 
   
     

   
     14 
   
     代码部分： 

   
     15 
   
     

   
     16 
   
     

   
     17 
   
      
   
     private
   
      DataView dvDept 
   
     =
   
      
   
     null
   
     ;

   
     18 
   
     

   
     19 
   
      
   
     private
   
      DataView dvMember 
   
     =
   
      
   
     null
   
     ;

   
     20 
   
      
   
     protected
   
      
   
     void
   
      Page_Load(
   
     object
   
      sender, EventArgs e)

   
     21 
   
      {

   
     22 
   
      CreateTable();

   
     23 
   
      AddTree(
   
     -
   
     1
   
     , (TreeNode)
   
     null
   
     );

   
     24 
   
      }

   
     25 
   
     

   
     26 
   
      
   
     private
   
      
   
     void
   
      CreateTable()

   
     27 
   
      {

   
     28 
   
     

   
     29 
   
      
   
     try
   
     

   
     30 
   
      {

   
     31 
   
      OleDbConnection con 
   
     =
   
      DataBase.Con;

   
     32 
   
      OleDbCommand cmd 
   
     =
   
      
   
     new
   
      OleDbCommand();

   
     33 
   
      cmd.Connection 
   
     =
   
      con;

   
     34 
   
      
   
     //
   
     cmd.CommandText = "select department.departmentId,department.departmentName,managerId,department.higherDepartmentId,member.memberId,member.name from department,member where department.departmentId=member.departmentId ";
   
     

   
     35 
   
      
   
      cmd.CommandText 
   
     =
   
      
   
     "
   
     select * from deptTree
   
     "
   
     ;

   
     36 
   
      OleDbDataAdapter da 
   
     =
   
      
   
     new
   
      OleDbDataAdapter();

   
     37 
   
      da.SelectCommand 
   
     =
   
      cmd;

   
     38 
   
      DataSet ds 
   
     =
   
      
   
     new
   
      DataSet();

   
     39 
   
      da.Fill(ds, 
   
     "
   
     deptTree
   
     "
   
     );

   
     40 
   
      dvDept 
   
     =
   
      ds.Tables[
   
     "
   
     deptTree
   
     "
   
     ].DefaultView;

   
     41 
   
      con.Close();

   
     42 
   
     

   
     43 
   
      OleDbConnection co 
   
     =
   
      DataBase.Con;

   
     44 
   
      OleDbCommand cm 
   
     =
   
      
   
     new
   
      OleDbCommand();

   
     45 
   
      cm.Connection 
   
     =
   
      co;

   
     46 
   
      
   
     //
   
     cmd.CommandText = "select department.departmentId,department.departmentName,managerId,department.higherDepartmentId,member.memberId,member.name from department,member where department.departmentId=member.departmentId ";
   
     

   
     47 
   
     
   
      cm.CommandText 
   
     =
   
      
   
     "
   
     select departmentId,memberId,name from member order by departmentId
   
     "
   
     ;

   
     48 
   
      OleDbDataAdapter daa 
   
     =
   
      
   
     new
   
      OleDbDataAdapter();

   
     49 
   
      daa.SelectCommand 
   
     =
   
      cm;

   
     50 
   
      DataSet dss 
   
     =
   
      
   
     new
   
      DataSet();

   
     51 
   
      daa.Fill(dss, 
   
     "
   
     dvMember
   
     "
   
     );

   
     52 
   
      dvMember 
   
     =
   
      dss.Tables[
   
     "
   
     dvMember
   
     "
   
     ].DefaultView;

   
     53 
   
      co.Close();

   
     54 
   
     

   
     55 
   
      

   
     56 
   
      

   
     57 
   
      }

   
     58 
   
      
   
     catch
   
      (Exception ex)

   
     59 
   
      {

   
     60 
   
      Response.Write(
   
     "
   
     数据库错误，错误原因：
   
     "
   
      
   
     +
   
      ex.Message);

   
     61 
   
      Response.End();

   
     62 
   
      }

   
     63 
   
      }

   
     64 
   
      

   
     65 
   
      
   
     public
   
      
   
     void
   
      AddTree(
   
     int
   
      parentId, TreeNode pNode)

   
     66 
   
      {

   
     67 
   
      dvDept.RowFilter 
   
     =
   
      
   
     "
   
     parentId=
   
     "
   
      
   
     +
   
      parentId;

   
     68 
   
      
   
     foreach
   
      (DataRowView row 
   
     in
   
      dvDept)

   
     69 
   
      {

   
     70 
   
      TreeNode Node 
   
     =
   
      
   
     new
   
      TreeNode();

   
     71 
   
      
   
     if
   
      (pNode 
   
     ==
   
      
   
     null
   
     ) 
   
     //
   
     当节点的父节点为空，则添加当前节点为根节点
   
     

   
     72 
   
     
   
      {

   
     73 
   
      Node.Text 
   
     =
   
      row[
   
     "
   
     deptName
   
     "
   
     ].ToString() ;

   
     74 
   
      Node.Value 
   
     =
   
      row[
   
     "
   
     nodeValue
   
     "
   
     ].ToString();

   
     75 
   
      TreeView1.Nodes.Add(Node);

   
     76 
   
      Node.Expanded 
   
     =
   
      
   
     true
   
     ;

   
     77 
   
      AddTree(Int32.Parse(row[
   
     "
   
     deptId
   
     "
   
     ].ToString()), Node); 
   
     //
   
     再次递归
   
     

   
     78 
   
     
   
      }

   
     79 
   
      
   
     else
   
     

   
     80 
   
      {

   
     81 
   
      
   
     //
   
     添加当前节点的子节点
   
     

   
     82 
   
     
   
      Node.Text 
   
     =
   
      
   
     "
   
     <a href='#' onDblClick=\
   
     "
   
     abc(
   
     '
   
     " + row["nodeValue"].ToString() + "
   
     '
   
     ,
   
     '
   
     " + row["deptName"].ToString() + "
   
     '
   
     )\
   
     "
   
     >
   
     "
   
      
   
     +
   
      row[
   
     "
   
     deptName
   
     "
   
     ].ToString() 
   
     +
   
      
   
     "
   
     </a>
   
     "
   
     ;

   
     83 
   
      Node.Value 
   
     =
   
      row[
   
     "
   
     nodeValue
   
     "
   
     ].ToString();

   
     84 
   
      pNode.ChildNodes.Add(Node);

   
     85 
   
      Node.Expanded 
   
     =
   
      
   
     true
   
     ; 
   
     //
   
     节点状态展开
   
     

   
     86 
   
     
   
      AddTree(Int32.Parse(row[
   
     "
   
     deptId
   
     "
   
     ].ToString()), Node); 
   
     //
   
     再次递归
   
     

   
     87 
   
     
   
      }

   
     88 
   
      }

   
     89 
   
     

   
     90 
   
      } 

   
     91 
   
     

   
     92 
   
      

   
     93 
   
     

   
     94