这个方法的类怎么写呀

Question

你要把这个 Page_Load 事件写成一个类?

Answer 1

这就是ASPX文件后台类的Load事件的方法呀，要是单独建一个类的话，就直接从Page继承，最好是建一个ASPX文件了

Answer 2

在html中写的格式
onclick="__doPostBack('Button2','');"

Answer 3

写类也不是直接写showlist()呀，class List
{
previde static void  showlist()
{
................
}
}然后调用List.showlist();

Answer 4

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using Microsoft.Web.UI.WebControls;private void Page_Load(object sender, System.EventArgs e)
  {
   // 在此处放置用户代码以初始化页面
   if(!Page.IsPostBack){
    Button del=newButton();
    del=(Button)Page.FindControl("delButton");
    del.Attributes.Add("onclick","return confirm('确定删除');");
    showlist();
    }
  }
private void showlist()
  {
   //绑定TreeView
  //infobase io=new infobase();   
   DropDownList1.Items.Clear();
   ListItem list=new ListItem();
   list.Value="0";
   list.Text="全部类别";
   DropDownList1.Items.Add(list);   //添加根节点
   TreeView1.Nodes.Clear();
   TreeNode node=new TreeNode();
   node.Text="类别列表";
   node.Target="0";
   node.Expanded=true;
   TreeView1.Nodes.Add(node);   
   treeShow(0,node);
   TreeView1.DataBind();
  }  private void treeShow(int parterid,TreeNode treenode){//递归类别
   //  
   DataSet ds=returnDataset(parterid);
   if (ds!=null)
   {
    for(int i=0;i<ds.Tables[0].Rows.Count;i++)
    {
     TreeNode node=new TreeNode();
     node.Target=ds.Tables[0].Rows[i]["id"].ToString();
     node.Text=ds.Tables[0].Rows[i]["name"].ToString();
     treenode.Nodes.Add(node);
     node.Expanded=true;
     DataSet ds2=returnDataset(Int32.Parse(ds.Tables[0].Rows[i]["id"].ToString()));
     if (ds2.Tables[0].Rows.Count>0)
     {
      treeShow(Int32.Parse(ds.Tables[0].Rows[i]["id"].ToString()),node);
     }
    }
   }
  }  private DataSet returnDataset(int parterid){
   OleDbConnection conn=new OleDbConnection();
   conn.ConnectionString=("server=localhost;database=pubs;uid=sa;pwd=sa");
   OleDbDataAdapter cmd;
   DataSet ds=new DataSet();
   try
   {
    conn.Open();
    cmd=new OleDbDataAdapter("select * from treeview where parterid="+parterid+" order by createtime asc"conn);
    cmd.Fill(ds);
   }
   catch(Exception ex)
   {
    Response.Write(ex.ToString());
    Response.End();
   }
   finally{
    conn.Dispose();
   }
   return ds;
  }  private void button1_Click(object sender, System.EventArgs e)
  {//添加节点
   if (TextBox1.Text!="")
   {
    TreeNode treenode=TreeView1.GetNodeFromIndex(TreeView1.SelectedNodeIndex);
    string[] treedepth=treenode.GetNodeIndex().Split('.');
    if(treenode.Target!=null)
    {
     int depth=treedepth.Length-1;//获得深度
     int parterid=Int32.Parse(treenode.Target);//获得父类ID
     string classname=TextBox1.Text;//获得类名
     OleDbConnection conn=new OleDbConnection();
     conn.ConnectionString=("server=localhost;database=pubs;uid=sa;pwd=sa");
     conn.Open();
     OleDbCommand cmd=new OleDbCommand();
     cmd.CommandType=CommandType.Text;
     cmd.Connection=conn;
     cmd.CommandText="";
     try
     {
      cmd.ExecuteNonQuery();
      Response.Write("添加成功");
      Response.End();
     }
     catch(Exception ex)
     {
      Response.Write(ex.ToString());
      Response.End();
     }
     finally
     {
      cmd.Dispose();
      conn.Dispose();
     }
    }
    else{
    //Response.Write(treenode.Target+"123<br>");
    }
   }
   else{
   Response.Write("请填写类别并选择节点");
   }
   }  private void button3_Click(object sender, System.EventArgs e)
  {//修改节点
   if (TextBox1.Text!="")
   {
    TreeNode treenode=TreeView1.GetNodeFromIndex(TreeView1.SelectedNodeIndex);
    int id=Int32.Parse(treenode.Target);
    string classname=TextBox1.Text;
    if(treenode.Target!=null)
    {
     OleDbConnection conn=new OleDbConnection();
     conn.ConnectionString=("server=localhost;database=pubs;uid=sa;pwd=sa");
     conn.Open();
     OleDbCommand cmd=new OleDbCommand();
     cmd.CommandType=CommandType.Text;
     cmd.Connection=conn;
     cmd.CommandText="";
     try
     {
      cmd.ExecuteNonQuery();
      Response.Write("修改成功");
      Response.End();
     }
     catch(Exception ex)
     {
      Response.Write(ex.ToString());
      Response.End();
     }
     finally
     {
      cmd.Dispose();
      conn.Dispose();
     }
    }
    else{}
   }
   else
   {
    Response.Write("请填写类别并选择节点");
   }
  }  private void button2_Click(object sender, System.EventArgs e)
  {//删除   
   TreeNode treenode=TreeView1.GetNodeFromIndex(TreeView1.SelectedNodeIndex);
   int id=Int32.Parse(treenode.Target);
   if (treenode.Target!="0")
   {      
   }
   else{
    Response.Write("不能删除根节点");    
   }
  }
 麻烦看一下，需要什么类呢