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程序演示地址:http://www.718.com.cn/other/Example.aspx 在网上看到了一些无刷新的联动控件。下下了测试以后,显示英文和数字可以,但是不可以显示中文,后来把从网上down下来的文件做了一个翻修改,做了一个省市的联动控件。给大家共享一下。可以显示中文了。 <%@ Page language="c#" Codebehind="Example.aspx.cs" AutoEventWireup="false" Inherits="Webs.other.Example" %> <HTML> <HEAD> <title>Example</title> <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1"> <meta name="CODE_LANGUAGE" Content="C#"> <meta name="vs_defaultClientScript" content="JavaScript"> <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5"> <script> function load(state){ var drp2 = document.getElementById("DropDownList2"); for (i = drp2.length; i >= 0; i--){ drp2.options.remove(i); }
var oHttpReq = new ActiveXObject("MSXML2.XMLHTTP"); var oDoc = new ActiveXObject("MSXML2.DOMDocument");
oHttpReq.open("POST", "getData.aspx?state="+state, false); oHttpReq.send(""); result = oHttpReq.responseText; oDoc.loadXML(result); items1 = oDoc.selectNodes("//CITY/Table/Id"); items2 = oDoc.selectNodes("//CITY/Table/shiname");
var itemsLength=items1.length; for(i=0;i<itemsLength;i++)
//将小类的类名和编号赋予DropDownList2 { var newOption = document.createElement("OPTION"); newOption.text=items2[i].text; newOption.value=items1[i].text; drp2.options.add(newOption); } } window.onload = function(){load(''''1'''');}
</script> </HEAD> <body MS_POSITIONING="FlowLayout"> <form id="Form1" method="post" runat="server"> <asp:DropDownList id="DropDownList1" runat="server"></asp:DropDownList> <asp:DropDownList id="DropDownList2" runat="server"></asp:DropDownList> <asp:TextBox id="TH" runat="server"></asp:TextBox> <asp:Button id="Button1" runat="server" Text="Button"></asp:Button> </form> </body> </HTML>
cs源文件: 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 Webs.other { /// <summary> /// Example 的摘要说明。 /// </summary> public class Example : System.Web.UI.Page { protected System.Web.UI.WebControls.DropDownList DropDownList1; protected System.Web.UI.WebControls.TextBox TH; protected System.Web.UI.WebControls.Button Button1; protected System.Web.UI.WebControls.DropDownList DropDownList2; 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(!this.IsPostBack) { // 建立数据源加载第一个DropDownList,也可以默认加载第二个 SqlConnection con = new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings.Get("connStr1")); SqlDataAdapter da = new SqlDataAdapter("select Id,shengname from Province",con); DataSet ds = new DataSet(); da.Fill(ds); this.DropDownList1.DataSource = ds; this.DropDownList1.DataTextField = "shengname"; this.DropDownList1.DataValueField = "Id"; this.DropDownList1.DataBind(); // 这里是绑定客户端事件,当第一个DropDownList的选项改变时激发下面的事件onchange,这个事件将调用一个客户端方法load() this.DropDownList1.Attributes.Add("onchange","load(this.options[this.selectedIndex].value)"); } } #region Web Form Designer generated code 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.Button1.Click += new System.EventHandler(this.Button1_Click); this.Load += new System.EventHandler(this.Page_Load); } #endregion private void Button1_Click(object sender, System.EventArgs e) { TH.Text=this.Request.Form["DropDownList2"].ToString(); } } }
getdata源文件 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 System.Xml; using System.Configuration; using System.Text; namespace Webs.other { /// <summary> /// GetData 的摘要说明。 /// </summary> public class GetData : System.Web.UI.Page { private void Page_Load(object sender, System.EventArgs e) { // 在此处放置用户代码以初始化页面 //Response.Write(Request["state"]); int shengNo=int.Parse(Request["state"].ToString()); SqlConnection con = new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings.Get("connStr1")); SqlDataAdapter da = new SqlDataAdapter("select Id,shiname from City where Shengid=''''"+shengNo+"''''",con); DataSet ds = new DataSet("CITY"); da.Fill(ds); XmlTextWriter writer = new XmlTextWriter(Response.OutputStream,Encoding.UTF8); writer.Formatting = Formatting.Indented; writer.Indentation = 4; writer.IndentChar = '''' ''''; writer.WriteStartDocument(); ds.WriteXml(writer); writer.Flush(); Response.End(); writer.Close(); } #region Web Form Designer generated code 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.Load += new System.EventHandler(this.Page_Load); } #endregion } }
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