AJax带数据库的三级联动

using System;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using ProjectManage.DataAccesslayer;
public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load（object sender EventArgs e）
    {
        AjaxPro.Utility.RegisterTypeForAjax（typeof（_Default））;

        if （!IsPostBack）
        {
            setProvince（）;
            ListItem listCity = new ListItem（“请选择“ “-1“）;
            ddlCity.Items.Insert（0 listCity）;
            ListItem listArea = new ListItem（“请选择“ “-1“）;
            ddlArea.Items.Insert（0 listArea）;
        }

    }
    private void setProvince（）
    {
        ddlProvince.DataSource = getdate（）;
        ddlProvince.DataTextField = “name“;
        ddlProvince.DataValueField = “pid“;
        ddlProvince.DataBind（）;
        ListItem listProvince = new ListItem（“请选择“ “-1“）;
        ddlProvince.Items.Insert（0 listProvince）;
    }

    public DataTable getdate（）
    {
        string strSql = “select * from cepro“;
        return SqlHelper.ExecuteDataset（Class1.ConnectionString CommandType.Text strSql）.Tables[0];
    }
    /// 

    /// 市
    /// 

    /// 
    /// 
    [AjaxPro.AjaxMethod（AjaxPro.HttpSessionStateRequirement.ReadWrite）]
    public string getParent（string parentID）
    {
        DataTable dtCity = getdate1（parentID）;
        string strCity = ““;
        for （int i = 0; i < dtCity.Rows.Count; i++）
        {
            strCity += dtCity.Rows[i][“name“].ToString（）.Trim（） + ““ + dtCity.Rows[i][“cid“].ToString（）.Trim（） + “-“;
            if （i == dtCity.Rows.Count - 1） strCity = strCity.Substring（0 strCity.Length - 1）;
        }
        return strCity;
    }
    /// 

    /// 县
    /// 

    /// 
    /// 
    [AjaxPro.AjaxMethod（AjaxPro.HttpSessionStateRequirement.ReadWrite）]
    public string getParentarea（string parentID）
    {
        DataTable dtCity = getdate2（parentID）;
        string strCity = ““;
        for （int i = 0; i < dtCity.Rows.Count; i++）
        {
            strCity += dtCity.Rows[i][“name“].ToString（）.Trim（） + ““ + dtCity.Rows[i][“cid“].ToString（）.Trim（） + “-“;
            if （i == dtCity.Rows.Count - 1） strCity = strCity.Substring（0 strCity.Length - 1）;
        }
        return strCity;
    }
    /// 

    /// 取市
    /// 

    /// 
    /// 
    public DataTable getdate1（string pid）
    {
        string strSql = “select * from cecity where pid=@pid“;
        SqlParameter[] _param =
        {
            new SqlParameter（“@pid“SqlDbType.VarChar）
        };
        _param[0].Value = pid;

 属性            大小     日期    时间   名称
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     文件        774  2009-03-04 10:27  shengshixianApp_CodeClass1.cs

     文件      74401  2009-03-04 10:30  shengshixianApp_CodeSqlHelper.cs

     文件     143360  2007-11-20 16:46  shengshixianinAjaxPro.2.dll

     文件         48  2009-03-04 10:24  shengshixianinAjaxPro.2.dll.refresh

     文件       5289  2009-03-04 12:18  shengshixianDefault.aspx

     文件       6020  2009-03-04 12:12  shengshixianDefault.aspx.cs

     文件       2244  2009-03-04 11:17  shengshixianWeb.config

     目录          0  2009-03-04 10:30  shengshixianApp_Code

     目录          0  2009-03-04 10:24  shengshixianApp_Data

     目录          0  2009-03-04 10:24  shengshixianin

     目录          0  2009-03-04 21:31  shengshixian

     文件        774  2009-03-04 10:27  shengshixianshengshixianApp_CodeClass1.cs

     文件      74401  2009-03-04 10:30  shengshixianshengshixianApp_CodeSqlHelper.cs

     文件     143360  2007-11-20 16:46  shengshixianshengshixianinAjaxPro.2.dll

     文件         36  2009-03-04 19:51  shengshixianshengshixianinAjaxPro.2.dll.refresh

     文件       5294  2009-03-04 18:56  shengshixianshengshixianDefault.aspx

     文件       6020  2009-03-04 12:12  shengshixianshengshixianDefault.aspx.cs

     文件       2234  2009-03-04 19:46  shengshixianshengshixianWeb.config

     目录          0  2009-03-04 10:30  shengshixianshengshixianApp_Code

     目录          0  2009-03-04 10:24  shengshixianshengshixianApp_Data

     目录          0  2009-03-04 10:24  shengshixianshengshixianin

     目录          0  2009-03-04 21:31  shengshixianshengshixian

     文件    3145728  2009-03-04 21:24  shengshixianshengshixiandatasheng.mdf

     文件    1048576  2009-03-04 21:24  shengshixianshengshixiandatasheng_log.ldf

     目录          0  2009-03-04 21:31  shengshixianshengshixiandata

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