最简单的上传文件

protected void BtnLoad_Click(object sender, EventArgs e)
{
if (this.FileUpload1.FileName == "")
{
Response.Write("<script>alert('没有上传文件')</script>");
return;
}
DataAccess.dataDR datadr = new dataDR();
datadr.delete("delete from dbo.autozhesuanxisubiao");
string fileName = DateTime.Now.ToString("yyMMddhhmmss") + ".xls";
string path = Server.MapPath("~/upload/excel/") + fileName;
FileUpload1.SaveAs(path);

if (path != null)
{
DataAccess.LoadSourceToDataAccess.loadAutoZhesSuangXiShu(path);
Response.Write("<script>alert('上传成功！')</script>");
}
else
{
Response.Write("<script>alert('没有上传文件')</script>");
}
}