ajaxpro的使用有关问题

2012-01-20

ajaxpro的使用问题我的项目中使用了ajaxpro是为了加载页面时，显示“请稍等……”，但在后台的方法中绑定gridvie

ajaxpro的使用问题
我的项目中使用了ajaxpro是为了加载页面时，显示“请稍等……”，但在后台的方法中绑定gridview去不显示数据。这是我的代码
页面
<%@ 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 runat="server">
<title>无标题页</title>
<script language="JavaScript" type="text/JavaScript">

</script>
</head>
<body onload="Working()">
<form id="form1" runat="server"><div id="div2" runat="server" style="z-index: 1; left: 430px; position: absolute;
top: 245px;">
<input type="image" src="busy.gif" />
  请稍等……
</div>
<div id="div1" >
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None">
<Columns>
<asp:BoundField DataField="name" HeaderText="name" />
<asp:BoundField DataField="sex" HeaderText="sex" />
<asp:BoundField DataField="mark4" HeaderText="mark4" />
<asp:BoundField DataField="year4" HeaderText="year4" />
</Columns>
<FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
<RowStyle BackColor="#FFFBD6" ForeColor="#333333" />
<SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="Navy" />
<PagerStyle BackColor="#FFCC66" ForeColor="#333333" HorizontalAlign="Center" />
<HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
<AlternatingRowStyle BackColor="White" />
</asp:GridView>
<asp:DropDownList ID="DropDownList1" runat="server">
</asp:DropDownList></div>
</form>
</body>
</html>
后台
using System;
using System.Data;
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 System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
AjaxPro.Utility.RegisterTypeForAjax
(typeof(_Default));
if (!IsPostBack)
{
// aaa();
}

}

[AjaxPro.AjaxMethod]

public string aaa()
{
DataSet ds = new DataSet();
try
{
SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["conn"].ConnectionString);
SqlDataAdapter da = new SqlDataAdapter("select top 10 * from tblperson", con);

da.Fill(ds, "tblperson");
this.DropDownList1.DataTextField = "name";
this.DropDownList1.DataValueField = "name";
this.DropDownList1.DataSource = ds;
this.DropDownList1.DataBind();

this.GridView1.DataSource = ds;
this.GridView1.DataBind();
}
catch (Exception e){

Response.Write(e);
}
return "123";
}

}

[解决办法]
两个错误
一、using没有引用ajaxpro
二、你不能在后台用ajax方法对服务器控件进行操作，那是无效的，你应该是返回一个结果集(如DataSet)给前台用js操作
按你上面的操作，你最后的"123"都返回不到前台的

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ajaxpro的使用有关问题