AjaxPro.Utility.RegisterTypeForAjax DropDownList三级联动

执行的类：

public   class  AjaxMethod
{
    [AjaxPro.AjaxMethod(AjaxPro.HttpSessionStateRequirement.Read)]
    public DataSet GetDepartmentList(string CorpCd)
    {
        ChooseEmployeeDSTableAdapters.DepartmentsTableAdapter adapter = new ChooseEmployeeDSTableAdapters.DepartmentsTableAdapter();
        ChooseEmployeeDS.DepartmentsDataTable table = adapter.GetData(CorpCd);

        DataSet ds = new DataSet();
        ds.Tables.Add(table);

        return ds;
    }

    [AjaxPro.AjaxMethod(AjaxPro.HttpSessionStateRequirement.Read)]
    public DataSet GetItemList(string DepartmentCd)
    {
        ChooseEmployeeDSTableAdapters.ProjectsTableAdapter adapter = new ChooseEmployeeDSTableAdapters.ProjectsTableAdapter();
        ChooseEmployeeDS.ProjectsDataTable table = adapter.GetData(DepartmentCd);

        DataSet ds = new DataSet();
        ds.Tables.Add(table);

        return ds;
    }

}

调用的页面.CS

using System;
using System.Data;
using System.Configuration;
using System.Collections;
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 BITOC.Portal.Lib;

public partial class Employee_ChooseEmployee : PortalBasePage
{

    protected void Page_Load(object sender, EventArgs e)
    {
        AjaxPro.Utility.RegisterTypeForAjax(typeof(AjaxMethod), this);


        if (!Page.IsPostBack && !Page.IsCallback)
        {
            ddlCorp.Attributes.Add("onclick", "DepartmentResult();");
            ddlDepartment.Attributes.Add("onclick", "ItemResult();");
        }else    {
            string corp=Request.Form["corp"];         

             string depart=Request.Form["ddlDepartment"];

           }

　　　　　　
    }
}

调用的页面.ASPX

<% @ Page Language = " C# "  EnableEventValidation = " false "  AutoEventWireup = " true "  CodeFile = " ChooseEmployee.aspx.cs "  Inherits = " Employee_ChooseEmployee "   %>

<! 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 runat = " server " >
     < title </ title >
    
     < script type = " text/javascript " >
    
    function DepartmentResult()
     {
        var ddlCorp = document.getElementById("ddlCorp");
        AjaxMethod.GetDepartmentList(ddlCorp.value,get_Department_Result_CallBack);

        ItemResult();
    }
    
    function get_Department_Result_CallBack(response)
     {
        if (response.value != null)
        {
            document.all("ddlDepartment").length=0;　　　　
            var ds = response.value;
            if(ds != null && typeof(ds) == "object" && ds.Tables != null)
            {
                document.all("ddlDepartment").options.add(new Option("", ""));
                
                for(var i=0; i<ds.Tables[0].Rows.length; i++)
                {
                    var name=ds.Tables[0].Rows[i].NameChs;
                    var id=ds.Tables[0].Rows[i].DepartmentCd;
                    document.all("ddlDepartment").options.add(new Option(name,id));
                }
            }
        }
        return;
    }
    
    
    function ItemResult()
     {
        var ddlDepartment = document.getElementById("ddlDepartment");
        AjaxMethod.GetItemList(ddlDepartment.value, get_item_Result_CallBack);
    }
    
    
    function get_item_Result_CallBack(response)
     {
        if (response.value != null)
        {
            document.all("ddlItem").length=0;　　　　
            var ds = response.value;
            if(ds != null && typeof(ds) == "object" && ds.Tables != null)
            {
                document.all("ddlItem").options.add(new Option("", ""));
                
                for(var i=0; i<ds.Tables[0].Rows.length; i++)
                {
                    var name = ds.Tables[0].Rows[i].Name;
                    var id = ds.Tables[0].Rows[i].ProjectCd;
                    document.all("ddlItem").options.add(new Option(name,id));
                }
            }
        }
        return;
    }


    function Check_Item()
     {
        if(document.all("ddlCorp") != null)
        {
            if(document.all("ddlCorp").value == "")
            {
                alert('');
                return false;
            }
        }
        
    }
     </ script >
</ head >
< body onload = " DepartmentResult();ItemResult(); " >
     < form id = " form1 "  runat = " server " >
     < div >
     < table style = " height: 30px " >
         < tr >
             < td style = " width:100px; " >
                 < asp:Literal ID = " Literal1 "  runat = " server " > 姓名 </ asp:Literal ></ td >
             < td style = " width:300px; " >
                 < asp:TextBox ID = " txtUserName "  runat = " server "  Width = " 120px " ></ asp:TextBox >
                 & nbsp; & nbsp;
                 < asp:CheckBox ID = " chkAccord "
                    runat = " server "  Text = " 前端一致 "   /></ td >
         </ tr >
     </ table >
     </ div >
     < asp:Panel ID = " Panel1 "  runat = " server "  Height = " 1px "  Width = " 125px " >
     < table style = " height: 30px " >
         < tr >
             < td style = " width:100px; " >
                 < asp:Literal ID = " Literal2 "  runat = " server " > 公司 / 部 门</ asp:Literal ></ td >
             < td style = " width:400px; " >
                 < asp:DropDownList ID = " ddlCorp "  runat = " server "  Width = " 240px "  DataSourceID = " ObjectDataSource1 "  DataTextField = " NameChs "  DataValueField = " CompanyCd " >
                 </ asp:DropDownList >& nbsp; & nbsp;  & nbsp;
                 < asp:DropDownList ID = " ddlDepartment "  runat = " server "  Width = " 120px "  DataSourceID = " ObjectDataSource3 "  DataTextField = " NameChs "  DataValueField = " DepartmentCd " >
                 </ asp:DropDownList >
                 < asp:ObjectDataSource ID = " ObjectDataSource1 "  runat = " server "  OldValuesParameterFormatString = " original_{0} "
                    SelectMethod = " GetData "  TypeName = " ChooseEmployeeDSTableAdapters.CompaniesTableAdapter " >
                 </ asp:ObjectDataSource >
                 & nbsp; & nbsp;
                 < asp:ObjectDataSource ID = " ObjectDataSource3 "  runat = " server "  OldValuesParameterFormatString = " original_{0} "
                     SelectMethod = " Query "  TypeName = " ChooseEmployeeDSTableAdapters.DepartmentsTableAdapter "  OnSelected = " ObjectDataSource3_Selected " >
                 </ asp:ObjectDataSource >
             </ td >
         </ tr >
     </ table >
     </ asp:Panel >
     < div style = " height:30px " >
     < table style = " height: 30px " >
         < tr >
             < td style = " width:100px; " >
                 < asp:Literal ID = " Literal3 "  runat = " server " >? 目 </ asp:Literal ></ td >
             < td style = " width:300px; " >
                 < asp:DropDownList ID = " ddlItem "  runat = " server "  Width = " 180px "  DataSourceID = " ObjectDataSource4 "  DataTextField = " Name "  DataValueField = " ProjectCd " >
                 </ asp:DropDownList >& nbsp;
                 < asp:ObjectDataSource ID = " ObjectDataSource4 "  runat = " server "  OldValuesParameterFormatString = " original_{0} "
                    SelectMethod = " Query "  TypeName = " ChooseEmployeeDSTableAdapters.ProjectsTableAdapter " >
                 </ asp:ObjectDataSource >
             </ td >
         </ tr >
     </ table >
     </ div >
     </ form >
</ body >
</ html >