前台JS调用后台函数问题

luckface 2012-03-31 05:10:40

前台页面

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="DownLoadFile._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></title>
<script type="text/javascript" src="js/jquery-1.7.1.min.js"></script>
</head>
<body>
<form id="form1" runat="server">
<div>
<input type="submit" value="提交" id="OK" />
<input visible="false" id="Hidden" />
</div>
</form>
<script>
$("#id").click()
{
document.write("<%ExportToExcel(); %>");
}
</script>
</body>
</html>

后台代码

public void ExportToExcel()
{
string strFile = " ";
string path = " ";
strFile = strFile + "export_ ";
strFile = strFile + DateTime.Now.ToString("yyyyMMddHHmm ");
strFile = strFile + ".xls ";
string fileName = strFile;
path = Server.MapPath("/") + "DownLoad\\" + fileName;
System.IO.FileStream fs = new FileStream(path, System.IO.FileMode.Create, System.IO.FileAccess.Write);
StreamWriter sw = new StreamWriter(fs, new System.Text.UnicodeEncoding());

/*DataRow[] myRow = dt.Select("");

//取得数据表各列标题，标题之间以\t分割，最后一个列标题后加回车符
for (int i = 0; i < dt.Columns.Count; i++)
{
sw.Write(dt.Columns[i].Caption.ToString() + "\t");
}
sw.Write("\n");
//逐行处理数据
foreach (DataRow row in myRow)
{
//在当前行中，逐列取得数据，数据之间以\t分割，结束时加回车符\n
for (int i = 0; i < dt.Columns.Count; i++)
{
sw.Write(row[i].ToString() + "\t");
}
sw.Write("\n");
}*/

sw.Flush();
sw.Close();
if (path != null)
{
//DownFile(path,fileName);
try
{
DownFile(path, fileName);
//DownFile(path, fileName);
}
catch (Exception e)
{
Response.Write("<script>alert('系统出现以下错误:\\n" + e.Message + "!\\n请尽快与管理员联系.')</script>");
}
}
}

private void DownFile(string path, string fileName)
{
//string fileName = "asd.txt";//客户端保存的文件名

//string filePath = Server.MapPath(path);//路径

FileInfo fileInfo = new FileInfo(path);

Response.Clear();

Response.ClearContent();

Response.ClearHeaders();

Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);

Response.AddHeader("Content-Length", fileInfo.Length.ToString());

Response.AddHeader("Content-Transfer-Encoding", "binary");

Response.ContentType = "application/octet-stream";

Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");

Response.WriteFile(fileInfo.FullName);

Response.Flush();

Response.End();
}

问题是：页面一加载就弹出下载提示！我想在点击按钮后再执行下载，
不用<asp:button 这种
就用上面的方法谢谢了

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