求助~~~~按钮没有反应~~

[slily0210]

事件丢失？我做的将datagrid的数据导出到Excel，但是按钮没反应。不知道怎么处理，我有把按钮控件删了再添加，好像还是没用。求助高手~
我的代码:
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;
namespace Elect
{
/// <summary>
/// Teacher 的摘要说明。
/// </summary>
public class Teacher : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DropDownList DDL_Course;
protected System.Web.UI.WebControls.DataGrid DG_Student;
protected System.Web.UI.WebControls.HyperLink HyperLink1;
protected System.Web.UI.WebControls.Image Image1;
protected System.Web.UI.WebControls.HyperLink HyperLink2;
protected System.Web.UI.WebControls.Button BT_Submit;
protected DBAccess DB = new DBAccess();

private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
DB.CheckSession("UName","您已掉线或未尚登录！","Login.aspx");
if(!Page.IsPostBack)
{
DDL_Course_Bind();
DG_Student_Bind();
}
}
/// <summary>
/// 自定义函数，绑定DropDownList
/// </summary>
protected void DDL_Course_Bind()
{
//获取教师号
string TNo = Session["UName"].ToString().Trim();
string SelectStr = "Select CName from Course where CTNo = '" + TNo + "'";
DB.BindDropDownList(SelectStr,"CName","CName",DDL_Course);
}
/// <summary>
/// 自定义函数，绑定DataGrid
/// </summary>
protected void DG_Student_Bind()
{
string CName = DDL_Course.SelectedItem.Value.Trim();
string SelectStr = "Select SNo,SName,SSex,SClass from Student where SNo in (Select SNo from Elect where CName = '" + CName + "')";
DB.BindDataGrid(SelectStr,DG_Student);
}
#region Web 窗体设计器生成的代码
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.DDL_Course.SelectedIndexChanged += new System.EventHandler(this.DDL_Course_SelectedIndexChanged);
this.BT_Submit.Click += new System.EventHandler(this.BT_Submit_Click);
this.Load += new System.EventHandler(this.Page_Load);

}
#endregion

private void DDL_Course_SelectedIndexChanged(object sender, System.EventArgs e)
{
DG_Student_Bind();
}
private void BT_Submit_Click(object sender, System.EventArgs e)
{
Response.Clear();
Response.Buffer= false;
Response.Charset="GB2312";
Response.AppendHeader("Content-Disposition","attachment;filename=test.xls");
Response.ContentEncoding=System.Text.Encoding.GetEncoding("GB2312");
Response.ContentType = "application/ms-excel";
this.EnableViewState = false;
System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
this.DG_Student.RenderControl(oHtmlTextWriter);
Response.Write(oStringWriter.ToString());
Response.End();
}
}
}

[hmj]

这个东西没做过

[Jianyi]

没反映/?/?
是服务器事件没执行还是执行了但没有导出/?

Response.Clear();
Response.Buffer= false;
Response.Charset="GB2312";
Response.AppendHeader("Content-Disposition","attachment;filename=test.xls");
Response.ContentEncoding=System.Text.Encoding.GetEncoding("GB2312");
Response.ContentType = "application/ms-excel";
this.EnableViewState = false;

DG_Student_Bind(); //////////////////加上这一句试试


System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
this.DG_Student.RenderControl(oHtmlTextWriter);
Response.Write(oStringWriter.ToString());
Response.End();

[wucuilan827]

你调试一下，跟踪代码，看看哪里有错误了
要是删了再填加过，不应该是事件丢失的

[slily0210]

不行啊~~~~~~~什么道理哦~~~~~~

[slily0210]

搞定。原来要在自己的目录下面加个Excel的文件

[Jianyi]

搞定。原来要在自己的目录下面加个Excel的文件
---------------------------
这样也行 ~？没道理啊~~~~~