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一棵好树,梅花树,后台生成前台htm树(asp.net c)

王朝asp·作者佚名  2006-01-10
窄屏简体版  字體: |||超大  

如果不用从后台生成前台htm静态树,则树的速度有点慢,所以我把梅花树改了下:

梅花树的资料:开发文档: http://www.meizz.com/Web/Article.asp?id=436

控件下载: http://www.meizz.com/Web/Download/MzTreeView10.rar

应用示例: http://www.meizz.com/Web/Demo/MzTreeView10.htm

首先模板treetemplate.htm文件如下:

<HTML>

<HEAD>

<title>tree</title>

<meta http-equiv="Content-Type" content="text/html; charset=gb2312">

<script language="JavaScript" src="MzTreeView10.js"></script>

<link href="menutree/menu.css" type="text/css" rel="stylesheet">

<style> A.MzTreeview { PADDING-LEFT: 3px; FONT-SIZE: 12px } </style>

</HEAD>

<body leftmargin="0" topmargin="2">

<SCRIPT LANGUAGE="JavaScript">

window.tree = new MzTreeView("tree");

tree.setIconPath("menutree/"); //可用相对路径

abcdefg

document.write(tree.toString()); //亦可用 obj.innerHTML = tree.toString();

//-->

</SCRIPT>

</body>

</HTML>

好了,下面是页面managertre.aspx的代码:

<%@ Page language="c#" Codebehind="managertree.aspx.cs" AutoEventWireup="false" Inherits="hualong.manager" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >

<HTML>

<HEAD>

<title>管理中心</title>

<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">

<meta content="C#" name="CODE_LANGUAGE">

<meta content="JavaScript" name="vs_defaultClientScript">

<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">

<LINK href="style.css" type="text/css" rel="stylesheet">

<script language="javascript">

<!--

function ShowJie()

{

TianJia.style.display = "";

}

function window.onload()

{

if(arr=document.cookie.match(/scrollTop=([^;]+)(;|$)/))

document.body.scrollTop=parseInt(arr[1]);

}

function window.onbeforeunload(){

document.cookie="scrollTop="+document.body.scrollTop;

}

//-->

</script>

</HEAD>

<body>

<form id="Form1" method="post" runat="server">

<br>

<table cellSpacing="0" cellPadding="0" width="350" border="0">

<tr>

<td align="center" width="50%"><INPUT onclick="ShowJie();" type="button" value="添加节点"></td>

<td align="center"><asp:button id="btnTree" runat="server" Text="生成树"></asp:button></td>

</tr>

</table>

<table id="TianJia" style="DISPLAY: none; BORDER-COLLAPSE: collapse" borderColor="#6595d6"

cellSpacing="1" cellPadding="0" width="1000" align="center" border="1">

<tr>

<td align="center" width="60"><asp:button id="btnAddOk" runat="server" Text="添加"></asp:button></td>

<td align="center" width="50"><asp:textbox id="txtId" runat="server" Wrap="False" Width="100%"></asp:textbox></td>

<td align="center" width="50"><asp:textbox id="txtParentId" runat="server" Wrap="False" Width="100%"></asp:textbox></td>

<td align="center" width="120"><asp:textbox id="txtText" runat="server" Wrap="False" Width="100%"></asp:textbox></td>

<td align="center" width="120"><asp:textbox id="txtHint" runat="server" Wrap="False" Width="100%"></asp:textbox></td>

<td align="center" width="60"><asp:textbox id="txtIcon" runat="server" Wrap="False" Width="100%"></asp:textbox></td>

<td align="center"><asp:textbox id="txtData" runat="server" Wrap="False" Width="100%"></asp:textbox></td>

<td align="center" width="150"><asp:textbox id="txtUrl" runat="server" Wrap="False" Width="100%"></asp:textbox></td>

<td align="center" width="50"><asp:textbox id="txtTarget" runat="server" Wrap="False" Width="100%"></asp:textbox></td>

<td align="center" width="120"><asp:textbox id="txtMethod" runat="server" Wrap="False" Width="100%"></asp:textbox></td>

</tr>

</table>

<TABLE id="Table1" cellSpacing="0" cellPadding="0" width="1000" align="center" border="0">

<TR>

<TD align="center" width="100%"><asp:datagrid id="dgTree" runat="server" Width="100%" DataKeyField="biaoshi_id" BorderWidth="1px"

BorderColor="#6595D6" AutoGenerateColumns="False">

<EditItemStyle Wrap="False"></EditItemStyle>

<ItemStyle Wrap="False"></ItemStyle>

<HeaderStyle Wrap="False" HorizontalAlign="Center" Height="30px" ForeColor="White" VerticalAlign="Middle"

BackColor="#6595D6"></HeaderStyle>

<Columns>

<asp:EditCommandColumn ButtonType="LinkButton" UpdateText="更新" HeaderText="管理" CancelText="取消" EditText="编辑">

<HeaderStyle Wrap="False" HorizontalAlign="Center" Width="60px"></HeaderStyle>

<ItemStyle Wrap="False" HorizontalAlign="Center"></ItemStyle>

<FooterStyle Wrap="False"></FooterStyle>

</asp:EditCommandColumn>

<asp:ButtonColumn Text="删除" HeaderText="删除" CommandName="Delete">

<HeaderStyle Wrap="False" HorizontalAlign="Center" Width="50px"></HeaderStyle>

<ItemStyle Wrap="False" HorizontalAlign="Center"></ItemStyle>

</asp:ButtonColumn>

<asp:BoundColumn DataField="ID" HeaderText="ID">

<HeaderStyle Wrap="False" HorizontalAlign="Center" Width="50px"></HeaderStyle>

<ItemStyle Wrap="False" HorizontalAlign="Center"></ItemStyle>

</asp:BoundColumn>

<asp:BoundColumn DataField="parentId" HeaderText="父ID">

<HeaderStyle Wrap="False" HorizontalAlign="Center" Width="50px"></HeaderStyle>

<ItemStyle Wrap="False" HorizontalAlign="Center"></ItemStyle>

</asp:BoundColumn>

<asp:BoundColumn DataField="text" HeaderText="节点文本">

<HeaderStyle Wrap="False" HorizontalAlign="Center" Width="120px"></HeaderStyle>

<ItemStyle Wrap="False" HorizontalAlign="Center"></ItemStyle>

</asp:BoundColumn>

<asp:BoundColumn DataField="hint" HeaderText="节点提示">

<HeaderStyle Wrap="False" HorizontalAlign="Center" Width="120px"></HeaderStyle>

<ItemStyle Wrap="False" HorizontalAlign="Center"></ItemStyle>

</asp:BoundColumn>

<asp:BoundColumn DataField="icon" HeaderText="节点图标">

<HeaderStyle Wrap="False" HorizontalAlign="Center" Width="60px"></HeaderStyle>

<ItemStyle Wrap="False" HorizontalAlign="Center"></ItemStyle>

</asp:BoundColumn>

<asp:BoundColumn DataField="data" HeaderText="URL参数">

<HeaderStyle Wrap="False" HorizontalAlign="Center"></HeaderStyle>

<ItemStyle Wrap="False" HorizontalAlign="Center"></ItemStyle>

</asp:BoundColumn>

<asp:BoundColumn DataField="url" HeaderText="URL">

<HeaderStyle Wrap="False" HorizontalAlign="Center" Width="150px"></HeaderStyle>

<ItemStyle Wrap="False" HorizontalAlign="Center"></ItemStyle>

</asp:BoundColumn>

<asp:BoundColumn DataField="target" HeaderText="Target">

<HeaderStyle Wrap="False" HorizontalAlign="Center" Width="50px"></HeaderStyle>

<ItemStyle Wrap="False" HorizontalAlign="Center"></ItemStyle>

</asp:BoundColumn>

<asp:BoundColumn DataField="method" HeaderText="Method">

<HeaderStyle Wrap="False" HorizontalAlign="Center" Width="120px"></HeaderStyle>

<ItemStyle Wrap="False" HorizontalAlign="Center"></ItemStyle>

</asp:BoundColumn>

</Columns>

</asp:datagrid></TD>

</TR>

</TABLE>

</form>

</body>

</HTML>

下面是后台managertree.aspx.cs后台文件:

using System;

using System.Collections;

using System.ComponentModel;

using System.Data;

using System.IO;

using System.Data.SqlClient;

using System.Configuration;

using System.Drawing;

using System.Web;

using System.Web.SessionState;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.HtmlControls;

namespace hualong

{

/// <summary>

/// manager 的摘要说明。

/// </summary>

public class manager : System.Web.UI.Page

{

protected System.Web.UI.WebControls.Button btnTree;

protected System.Web.UI.WebControls.TextBox txtId;

protected System.Web.UI.WebControls.TextBox txtParentId;

protected System.Web.UI.WebControls.Button btnAddOk;

protected System.Web.UI.WebControls.TextBox txtHint;

protected System.Web.UI.WebControls.TextBox txtIcon;

protected System.Web.UI.WebControls.TextBox txtData;

protected System.Web.UI.WebControls.TextBox txtUrl;

protected System.Web.UI.WebControls.TextBox txtTarget;

protected System.Web.UI.WebControls.TextBox txtMethod;

protected System.Web.UI.WebControls.TextBox txtText;

protected System.Web.UI.WebControls.DataGrid dgTree;

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(!IsPostBack)

{

BindData();

}

}

#region Web 窗体设计器生成的代码

override protected void OnInit(EventArgs e)

{

//

// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。

//

InitializeComponent();

base.OnInit(e);

}

/// <summary>

/// 设计器支持所需的方法 - 不要使用代码编辑器修改

/// 此方法的内容。

/// </summary>

private void InitializeComponent()

{

this.btnTree.Click += new System.EventHandler(this.btnTree_Click);

this.btnAddOk.Click += new System.EventHandler(this.btnAddOk_Click);

this.dgTree.CancelCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dgTree_CancelCommand);

this.dgTree.EditCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dgTree_EditCommand);

this.dgTree.UpdateCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dgTree_UpdateCommand);

this.dgTree.DeleteCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dgTree_DeleteCommand);

this.Load += new System.EventHandler(this.Page_Load);

}

#endregion

private void BindData()

{

string connString = ConfigurationSettings.AppSettings["connStr1"].ToString();

SqlConnection conn = new SqlConnection(connString);

SqlCommand comm = new SqlCommand("select_treeview_pwqzc",conn);

comm.CommandType = CommandType.StoredProcedure;

conn.Open();

dgTree.DataSource = comm.ExecuteReader();

dgTree.DataBind();

conn.Close();

}

private void dgTree_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

{

dgTree.EditItemIndex = e.Item.ItemIndex;

BindData();

}

private void dgTree_CancelCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

{

dgTree.EditItemIndex = -1;

BindData();

}

private void btnTree_Click(object sender, System.EventArgs e)

{

string str;//用他来包含所有树的节点信息

string connectstring = System.Configuration.ConfigurationSettings.AppSettings["connStr1"].ToString();

System.Data.SqlClient.SqlConnection conn = new System.Data.SqlClient.SqlConnection(connectstring);

System.Data.SqlClient.SqlDataAdapter adapter = new System.Data.SqlClient.SqlDataAdapter("select_treeview_pwqzc",conn);

try

{

System.Text.StringBuilder node = new System.Text.StringBuilder();

conn.Open();

System.Data.DataSet dataset = new System.Data.DataSet();

dataset.Tables.Add("treeview");

adapter.Fill(dataset,"treeview");

foreach(System.Data.DataRow row in dataset.Tables[0].Rows)

{

node.Append("\r\n tree.nodes[\""+ row["parentId"].ToString() + "_" + row["id"] + "\"] = \"");

node.Append("text:" + row["text"].ToString().Replace("\0xE",";") + ";");

node.Append(row["hint"] != DBNull.Value && row["hint"].ToString() != string.Empty ? "hint:" + row["hint"].ToString().Replace("\0xE",";") + ";" : string.Empty);

node.Append(row["icon"] != DBNull.Value && row["icon"].ToString() != string.Empty ? "icon:" + row["icon"].ToString().Replace("\0xE",";") + ";" : string.Empty);

node.Append(row["data"] != DBNull.Value && row["data"].ToString() != string.Empty ? "data:" + row["data"].ToString().Replace("\0xE",";") +Server.UrlEncode(row["text"].ToString())+ ";" : string.Empty);

node.Append(row["url"] != DBNull.Value && row["url"].ToString() != string.Empty ? "url:" + row["url"].ToString().Replace("\0xE",";") + ";" : string.Empty);

node.Append(row["target"] != DBNull.Value && row["target"].ToString() != string.Empty ? "target:" + row["target"].ToString().Replace("\0xE",";") + ";" : string.Empty);

node.Append(row["method"] != DBNull.Value && row["method"].ToString() != string.Empty ? "method:" + row["method"].ToString().Replace("\0xE",";") + ";" : string.Empty);

node.Append("\"");

}

str = node.ToString();

dataset.Dispose();

}

finally

{

conn.Close();

}

StreamReader sr = new StreamReader(Server.MapPath(".")+"\\bbs\\treetemplate.htm",System.Text.Encoding.GetEncoding("gb2312"));//读取模板

string str1 = sr.ReadToEnd();

str1 = str1.Replace("abcdefg",str);//替换摸板里面的字符串

sr.Close();//关闭sr

StreamWriter sw = new StreamWriter(Server.MapPath(".")+"\\bbs\\left.htm",false,System.Text.Encoding.GetEncoding("gb2312"));//写入文件left.htm

sw.Write(str1);

sw.Flush();

sw.Close();

Response.Write("<script language=\"javascript\">alert('生成树成功!');</script>");

}

private void btnAddOk_Click(object sender, System.EventArgs e)

{

if(txtId.Text.Trim()=="" || txtParentId.Text.Trim()=="")

{

Page.RegisterStartupScript("","<script>alert('节点值与父节点值不能为空!而且只能够是整数!');document.getElementById('TianJia').style.display='';</script>");

return;

}

else

{

string connString = ConfigurationSettings.AppSettings["connStr1"].ToString();

SqlConnection conn = new SqlConnection(connString);

string selString = "select Count(id) from treeview where ID = @id";

SqlCommand comm = new SqlCommand(selString,conn);

comm.Parameters.Add(new SqlParameter("@id",SqlDbType.Int));

comm.Parameters["@id"].Value = Convert.ToInt32(txtId.Text.Trim());

conn.Open();

int i = (int)comm.ExecuteScalar();

conn.Close();

if(i>0)

{

Page.RegisterStartupScript("","<script>alert('已经存在相同ID值的节点,请重新输入!');document.getElementById('TianJia').style.display='';</script>");

return;

}

else

{

string insertString = "insert into treeview(ID,parentId,text,hint,icon,data,url,target,method) values(@ID,@parentId,@text,@hint,@icon,@data,@url,@target,@method)";

//插入数据库命令

SqlCommand comm1 = new SqlCommand(insertString,conn);

comm1.Parameters.Add(new SqlParameter("@ID",SqlDbType.Int));

comm1.Parameters.Add(new SqlParameter("@parentId",SqlDbType.Int));

comm1.Parameters.Add(new SqlParameter("@text",SqlDbType.VarChar,255));

comm1.Parameters.Add(new SqlParameter("@hint",SqlDbType.VarChar,255));

comm1.Parameters.Add(new SqlParameter("@icon",SqlDbType.VarChar,50));

comm1.Parameters.Add(new SqlParameter("@data",SqlDbType.VarChar,255));

comm1.Parameters.Add(new SqlParameter("@url",SqlDbType.VarChar,255));

comm1.Parameters.Add(new SqlParameter("@target",SqlDbType.VarChar,50));

comm1.Parameters.Add(new SqlParameter("@method",SqlDbType.VarChar,255));

//上面都是添加参数,下面是给参数赋值

comm1.Parameters["@ID"].Value = Convert.ToInt32(txtId.Text.Trim());

comm1.Parameters["@parentId"].Value = Convert.ToInt32(txtParentId.Text.Trim());

comm1.Parameters["@text"].Value = txtText.Text.Trim();

comm1.Parameters["@hint"].Value = txtHint.Text.Trim();

comm1.Parameters["@icon"].Value = txtIcon.Text.Trim();

comm1.Parameters["@data"].Value = txtData.Text.Trim();

comm1.Parameters["@url"].Value = txtUrl.Text.Trim();

comm1.Parameters["@target"].Value = txtTarget.Text.Trim();

comm1.Parameters["@method"].Value = txtMethod.Text.Trim();

conn.Open();

comm1.ExecuteNonQuery();//执行更新命令

conn.Close();

Response.Write("<script>alert('插入数据成功!');</script>");

BindData();//再次绑定数据

}

}

}

private void dgTree_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

{

string connString = ConfigurationSettings.AppSettings["connStr1"].ToString();//连接数据库

SqlConnection conn = new SqlConnection(connString);

string delString = "delete from treeview where biaoshi_id=@biaoshi_id";//删除语句

SqlCommand comm = new SqlCommand(delString,conn);

comm.Parameters.Add(new SqlParameter("@biaoshi_id",SqlDbType.Int));//添加参数并且给参数赋值

comm.Parameters["@biaoshi_id"].Value = dgTree.DataKeys[e.Item.ItemIndex];//把单击删除按钮这行的主键值给参数赋值

conn.Open();

comm.ExecuteReader();//执行删除命令

conn.Close();

BindData();//重新绑定数据

}

private void dgTree_UpdateCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

{

//更新数据

string connString = ConfigurationSettings.AppSettings["connStr1"].ToString();//连接数据库

SqlConnection conn = new SqlConnection(connString);

//先看是不是有ID重复的节点

string selString = "select Count(*) from treeview where ID=@ID";

SqlCommand comm = new SqlCommand(selString,conn);

comm.Parameters.Add(new SqlParameter("@ID",SqlDbType.Int));//添加参数并且给参数赋值

comm.Parameters["@ID"].Value = Convert.ToInt32((e.Item.Cells[2].Controls[0] as TextBox).Text.Trim());//把单击更新按钮这行的ID值给参数赋值

conn.Open();

int i = (int)comm.ExecuteScalar();

conn.Close();

if(i>0)//如果存在相同的节点值

{

Page.RegisterStartupScript("","<script>alert('已经存在相同ID值的节点,请重新输入!');document.getElementById('TianJia').style.display='';</script>");

return;

}

else

{

string updateString = "update treeview set ID=@ID,parentId=@parentId,text=@text,hint=@hint,icon=@icon,data=@data,url=@url,target=@target,method=@method where biaoshi_id=@biaoshi_id";

//更新数据库命令

SqlCommand comm1 = new SqlCommand(updateString,conn);

comm1.Parameters.Add(new SqlParameter("@biaoshi_id",SqlDbType.Int));//添加参数并且给参数赋值

comm1.Parameters["@biaoshi_id"].Value = dgTree.DataKeys[e.Item.ItemIndex];//把单击删除按钮这行的主键值给参数赋值

comm1.Parameters.Add(new SqlParameter("@ID",SqlDbType.Int));

comm1.Parameters.Add(new SqlParameter("@parentId",SqlDbType.Int));

comm1.Parameters.Add(new SqlParameter("@text",SqlDbType.VarChar,255));

comm1.Parameters.Add(new SqlParameter("@hint",SqlDbType.VarChar,255));

comm1.Parameters.Add(new SqlParameter("@icon",SqlDbType.VarChar,50));

comm1.Parameters.Add(new SqlParameter("@data",SqlDbType.VarChar,255));

comm1.Parameters.Add(new SqlParameter("@url",SqlDbType.VarChar,255));

comm1.Parameters.Add(new SqlParameter("@target",SqlDbType.VarChar,50));

comm1.Parameters.Add(new SqlParameter("@method",SqlDbType.VarChar,255));

//上面都是添加参数,下面是给参数赋值

comm1.Parameters["@ID"].Value = Convert.ToInt32((e.Item.Cells[2].Controls[0] as TextBox).Text.Trim());

comm1.Parameters["@parentId"].Value = Convert.ToInt32((e.Item.Cells[3].Controls[0] as TextBox).Text.Trim());

comm1.Parameters["@text"].Value = (e.Item.Cells[4].Controls[0] as TextBox).Text.Trim();

comm1.Parameters["@hint"].Value = (e.Item.Cells[5].Controls[0] as TextBox).Text.Trim();

comm1.Parameters["@icon"].Value = (e.Item.Cells[6].Controls[0] as TextBox).Text.Trim();

comm1.Parameters["@data"].Value = (e.Item.Cells[7].Controls[0] as TextBox).Text.Trim();

comm1.Parameters["@url"].Value = (e.Item.Cells[8].Controls[0] as TextBox).Text.Trim();

comm1.Parameters["@target"].Value = (e.Item.Cells[9].Controls[0] as TextBox).Text.Trim();

comm1.Parameters["@method"].Value = (e.Item.Cells[10].Controls[0] as TextBox).Text.Trim();

conn.Open();

comm1.ExecuteNonQuery();//执行更新命令

conn.Close();

Response.Write("<script>alert('更新数据成功!');</script>");

dgTree.EditItemIndex = -1;//让编辑状态取消

BindData();//再次绑定数据

}

}

}

}

我在数据表中添加了一个字段biaoshi_id,他是标识列,自动递增.

 
 
 
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靜靜地坐在廢墟上,四周的荒凉一望無際,忽然覺得,淒涼也很美
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