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仿google下拉提示

1.建立一aspx頁面，html代碼

<HTML>

<HEAD>

<title>WebForm1</title>

//城市------------------------------

function cityResult()

{

var city=document.getElementById("TextBox1");

WebForm1.GetCityList(city.value,get_city_Result_CallBack);

}

function get_city_Result_CallBack(response)

{

if (response.value != null)

{

//debugger;

document.getElementById("DropDownList1").style.display="block";

document.getElementById("DropDownList1").length=0;　　　　

　　　　 var ds = response.value;

if(ds != null && typeof(ds) == "object" && ds.Tables != null)

{

for(var i=0; i<ds.Tables[0].Rows.length; i++)

　　　　 {

　　　　 var name=ds.Tables[0].Rows[i].city;

　　　　　　 var id=ds.Tables[0].Rows[i].cityID;

　　　　　　 document.getElementById("DropDownList1").options.add(new Option(name,id));

　　　　 }

else

{

document.getElementById("DropDownList1").style.display="none";

}

return

}

function getData()

{

var province=document.getElementById("DropDownList1");

var pindex = province.selectedIndex;

var pValue = province.options[pindex].value;

var pText = province.options[pindex].text;

document.getElementById("<%=TextBox1.ClientID%>").innerText=pText;

}

</SCRIPT>

</HEAD>

<body>

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

<br>

<asp:DropDownList ID="DropDownList1" runat="server" Width="192px" style="display:none"></asp:DropDownList>

</form>

</body>

</HTML>

2.cs代碼

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;

namespace ajaxselect

{

/// <summary>

/// Summary description for WebForm1.

/// </summary>

public class WebForm1 : System.Web.UI.Page

{

protected System.Web.UI.WebControls.TextBox TextBox1;

protected System.Web.UI.WebControls.DropDownList DropDownList1;

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

{

Ajax.Utility.RegisterTypeForAjax(typeof(WebForm1));

if (!Page.IsPostBack)

{

this.TextBox1.Attributes.Add("onchange", "cityResult();");

this.DropDownList1.Attributes.Add("onclick", "getData();");

}

#region Web Form Designer generated code

override protected void OnInit(EventArgs e)

{

//

// CODEGEN: This call is required by the ASP.NET Web Form Designer.

//

InitializeComponent();

base.OnInit(e);

}

/// <summary>

/// Required method for Designer support - do not modify

/// the contents of this method with the code editor.

/// </summary>

private void InitializeComponent()

{

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

}

#endregion

#region GetCityList

[Ajax.AjaxMethod(Ajax.HttpSessionStateRequirement.Read)]

public DataSet GetCityList(int provinceid)

{

string sql = "select * from city where father like '%" + provinceid + "%'";

return GetDataSet(sql);

}

#endregion

#region GetDataSet

public static DataSet GetDataSet(string sql)

{

string ConnectionString = System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"];

SqlDataAdapter sda = new SqlDataAdapter(sql, ConnectionString);

DataSet ds = new DataSet();

sda.Fill(ds);

return ds;

}

#endregion

}

3.源代碼下載
4.數(shù)據(jù)庫腳本

CREATE TABLE [dbo].[city](

[id] [int] NOT NULL,

[cityID] [nvarchar](6) COLLATE Chinese_PRC_CI_AS NULL,

[city] [nvarchar](50) COLLATE Chinese_PRC_CI_AS NULL,

[father] [nvarchar](6) COLLATE Chinese_PRC_CI_AS NULL,

CONSTRAINT [PK_city] PRIMARY KEY CLUSTERED

(

[id] ASC

)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]

) ON [PRIMARY]

posted on 2008-01-04 11:47 幸福閱讀(39

posted on 2008-04-15 09:52 不后悔閱讀(894) 評論(0) 收藏舉報

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