页面写出来了,不知道怎么写提交!希望哪为朋友个写个例子!谢谢!a.aspx <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title> </title>
<link href="Untitled-1.css" rel="stylesheet" type="text/css" />
</head>
<script language="javascript" type="text/javascript">
<!--
// ACLOUD 常用JS函数
function getBid(s){
return document.getElementById(s);
}
function getBmc(s){
return document.getElementByName(s);
} //显示分类列表
function showNext(sid,obj)
{
if(sid==null ¦ ¦ sid=="" ¦ ¦ sid.length <1)return;
var slt =getBid(obj);
var v = _Default.getNextClass(sid).value; // 类的名称
//alert(v);
//return;
if (v != null){
if(v != null && typeof(v) == "object" && v.Tables != null)
{
slt.length = 0;
slt.options.add;
//加了个“请选择”主要为了触发onchange事件
if(obj=="ddl2"){
}
for(var i=0; i <v.Tables[0].Rows.length; i++)
{
var txt = v.Tables[0].Rows[i].txt; //这个地方需要注意区分大小写
var vol = v.Tables[0].Rows[i].vol; //跟dataset表的列名称要一致
slt.options.add(new Option(txt,vol));
}
}
}
return;
}
-->
</script>
<body>
<form id="form1" runat="server">
<div class="table1">
<li>a </li>
<li>b </li>
<li>c </li>
<li>d </li>
<li>e </li> </div> <br />
<div class="table1">
<li> <asp:DropDownList ID="ddl1" runat="server" Width="70px">
</asp:DropDownList> </li>
<li> <asp:DropDownList ID="ddl2" runat="server" Width="70px">
</asp:DropDownList> </li>
<li> <asp:TextBox ID="TextBox1" runat="server" MaxLength="15" Width="90px"> </asp:TextBox> </li>
<li> <asp:TextBox ID="TextBox2" runat="server" Width="80px"> </asp:TextBox> </li>
<li> <asp:TextBox ID="TextBox3" runat="server" MaxLength="11" Width="80px"> </asp:TextBox> </li>
<li> <asp:Button ID="Button1" runat="server" Text="提交" /> </li> </div>
</form>
</body>
</html> a.aspx.cs using System;
using System.Data;
using System.Configuration;
using System.Data.OleDb;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls; public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
AjaxPro.Utility.RegisterTypeForAjax(typeof(_Default)); //必要的
if (!IsPostBack) BindDc();
} /// <summary>
/// 数据库连接
/// </summary>
/// <returns> </returns>
public OleDbConnection myConn()
{
string ConnStr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + System.Web.HttpContext.Current.Server.MapPath(ConfigurationManager.AppSettings["dbpath"]);
OleDbConnection conn = new OleDbConnection(ConnStr);
try
{
conn.Open();
return conn;
}
catch
{
throw;
}
} /// <summary>
/// 获取下级分类
/// </summary>
[AjaxPro.AjaxMethod]
public DataSet getNextClass(string cid)
{
//因为不希望页面可以知道字段名称 所以 as txt,id as vol 如果是sql ser 可以用 =
//页面获取的 列名称 必须跟这个一同样 而且区分大小写 一般都是这个地方容易疏忽了
//所以二级分类没变化
string sql = @"select cname as txt,id as vol from webclass where parentid=" + cid;
try
{
return getDs(sql);
}
catch
{
//throw;
return null;
}
}
/// <summary>
/// 返回一个DataSet
/// </summary>
/// <param name="SQL"> </param>
/// <returns> </returns>
public DataSet getDs(string SQL)
{
OleDbConnection conn = myConn();
DataSet Ds = new DataSet();
OleDbDataAdapter Da = new OleDbDataAdapter(SQL, conn);
try
{
Da.Fill(Ds);
return Ds;
}
catch
{
return null;
//throw;
} }
/// <summary>
/// //数据绑定
/// </summary>
private void BindDc()
{
//第一个
string sql = @"select * from webclass where Parentid=0";
ddl1.DataSource = getDs(sql);
ddl1.DataTextField = "cname";
ddl1.DataValueField = "id";
ddl1.DataBind();
if (ddl1.DataSource != null) ddl1.Attributes.Add("onchange", "showNext(this.options[selectedIndex].value,'ddl2');");
//可以先判断 DropDownList.SelectedItem.Value
//第二个
sql = @"select * from webclass where parentid=" + ddl1.SelectedItem.Value;
ddl2.DataSource = getDs(sql);
ddl2.DataTextField = "cname";
ddl2.DataValueField = "id";
ddl2.DataBind(); }
}
数据库结构
WebClassID CNAME ParentID1 aaa 0
2 bbb 0
3 111 1
4 222 3
提交的数据库
datumid breed type code name mobile
<head id="Head1" runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title> </title>
<link href="Untitled-1.css" rel="stylesheet" type="text/css" />
</head>
<script language="javascript" type="text/javascript">
<!--
// ACLOUD 常用JS函数
function getBid(s){
return document.getElementById(s);
}
function getBmc(s){
return document.getElementByName(s);
} //显示分类列表
function showNext(sid,obj)
{
if(sid==null ¦ ¦ sid=="" ¦ ¦ sid.length <1)return;
var slt =getBid(obj);
var v = _Default.getNextClass(sid).value; // 类的名称
//alert(v);
//return;
if (v != null){
if(v != null && typeof(v) == "object" && v.Tables != null)
{
slt.length = 0;
slt.options.add;
//加了个“请选择”主要为了触发onchange事件
if(obj=="ddl2"){
}
for(var i=0; i <v.Tables[0].Rows.length; i++)
{
var txt = v.Tables[0].Rows[i].txt; //这个地方需要注意区分大小写
var vol = v.Tables[0].Rows[i].vol; //跟dataset表的列名称要一致
slt.options.add(new Option(txt,vol));
}
}
}
return;
}
-->
</script>
<body>
<form id="form1" runat="server">
<div class="table1">
<li>a </li>
<li>b </li>
<li>c </li>
<li>d </li>
<li>e </li> </div> <br />
<div class="table1">
<li> <asp:DropDownList ID="ddl1" runat="server" Width="70px">
</asp:DropDownList> </li>
<li> <asp:DropDownList ID="ddl2" runat="server" Width="70px">
</asp:DropDownList> </li>
<li> <asp:TextBox ID="TextBox1" runat="server" MaxLength="15" Width="90px"> </asp:TextBox> </li>
<li> <asp:TextBox ID="TextBox2" runat="server" Width="80px"> </asp:TextBox> </li>
<li> <asp:TextBox ID="TextBox3" runat="server" MaxLength="11" Width="80px"> </asp:TextBox> </li>
<li> <asp:Button ID="Button1" runat="server" Text="提交" /> </li> </div>
</form>
</body>
</html> a.aspx.cs using System;
using System.Data;
using System.Configuration;
using System.Data.OleDb;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls; public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
AjaxPro.Utility.RegisterTypeForAjax(typeof(_Default)); //必要的
if (!IsPostBack) BindDc();
} /// <summary>
/// 数据库连接
/// </summary>
/// <returns> </returns>
public OleDbConnection myConn()
{
string ConnStr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + System.Web.HttpContext.Current.Server.MapPath(ConfigurationManager.AppSettings["dbpath"]);
OleDbConnection conn = new OleDbConnection(ConnStr);
try
{
conn.Open();
return conn;
}
catch
{
throw;
}
} /// <summary>
/// 获取下级分类
/// </summary>
[AjaxPro.AjaxMethod]
public DataSet getNextClass(string cid)
{
//因为不希望页面可以知道字段名称 所以 as txt,id as vol 如果是sql ser 可以用 =
//页面获取的 列名称 必须跟这个一同样 而且区分大小写 一般都是这个地方容易疏忽了
//所以二级分类没变化
string sql = @"select cname as txt,id as vol from webclass where parentid=" + cid;
try
{
return getDs(sql);
}
catch
{
//throw;
return null;
}
}
/// <summary>
/// 返回一个DataSet
/// </summary>
/// <param name="SQL"> </param>
/// <returns> </returns>
public DataSet getDs(string SQL)
{
OleDbConnection conn = myConn();
DataSet Ds = new DataSet();
OleDbDataAdapter Da = new OleDbDataAdapter(SQL, conn);
try
{
Da.Fill(Ds);
return Ds;
}
catch
{
return null;
//throw;
} }
/// <summary>
/// //数据绑定
/// </summary>
private void BindDc()
{
//第一个
string sql = @"select * from webclass where Parentid=0";
ddl1.DataSource = getDs(sql);
ddl1.DataTextField = "cname";
ddl1.DataValueField = "id";
ddl1.DataBind();
if (ddl1.DataSource != null) ddl1.Attributes.Add("onchange", "showNext(this.options[selectedIndex].value,'ddl2');");
//可以先判断 DropDownList.SelectedItem.Value
//第二个
sql = @"select * from webclass where parentid=" + ddl1.SelectedItem.Value;
ddl2.DataSource = getDs(sql);
ddl2.DataTextField = "cname";
ddl2.DataValueField = "id";
ddl2.DataBind(); }
}
数据库结构
WebClassID CNAME ParentID1 aaa 0
2 bbb 0
3 111 1
4 222 3
提交的数据库
datumid breed type code name mobile
直接双击进去 然后在里面寫代码!
if (!Page.IsPostBack)
{
this.ddlProvince.Attributes.Add("onchange", "ddl_getcity(this);return false;");
this.ddlCity.Attributes.Add("onchange", "ddl_getarea(this);return false;");
provincebind(ddlProvince);
}
public void provincebind(DropDownList ddl)
{
string sql = "select provinceID,province from Province";
DataSet ds = getDataSet(sql);
ddl.DataSource = ds;
ddl.DataValueField = "provinceID";
ddl.DataTextField = "province";
ddl.DataBind();
}
忘了说是 Access 数据库的