C#如何实现下载文件保存到本地上面去

public void btnTemplate_Click(object sender, EventArgs e)
{

string strResult = string.Empty;
string strPath = Server.MapPath("~/uploadfile/");
string strFile = string.Format(@"{0}\{1}", strPath, "base.xls");

using (FileStream fs = new FileStream(strFile, FileMode.Open))
{
byte[] bytes = new byte[(int) fs.Length];
fs.Read(bytes, 0, bytes.Length);
fs.Close();
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode("base.xlsx", System.Text.Encoding.UTF8));
Response.BinaryWrite(bytes);
Response.Flush();
Response.End();
}
}
strPath:模板存放路径