c# - asp.net限制上传文件的大小

Question

我想将上传的文件大小限制在一定范围内。但是，这里的问题是我想在超过上传大小时提供弹出警报。但是，这里的网页反而显示如下错误

HTTP Error 404.13 - Not Found

请求过滤模块被配置为拒绝超过请求内容长度的请求。这是我的代码

 protected void Button1_Click(object sender, EventArgs e)
{
    if (fuDocpath.HasFiles)
    {
        try
        {
            DateTime now = DateTime.Now;
            lbldateStamp.Text = now.ToString("mm_dd_yyyy_hh_mm_ss");
            //string foldername = lblsessionID.Text + "_" + lbldateStamp.Text;
            string folderpath = (Server.MapPath("~/Uploaded_Files/") + lblsessionID.Text + "_" + lbldateStamp.Text + "/");
            Directory.CreateDirectory(folderpath);
            if (fuDocpath.PostedFile.ContentLength < 20970000)
            {
                try
                {
                    foreach (HttpPostedFile files in fuDocpath.PostedFiles)
                    {
                        string filename = Path.GetFileName(files.FileName);
                        string folderpath1 = folderpath + "/";
                        fuDocpath.SaveAs(folderpath1 + filename);
                        lblName.Text = lblName.Text + "|" + filename;
                        lblerror.Text = string.Empty;
                    }
                }
                catch (Exception eex)
                {
                    ClientScript.RegisterStartupScript(this.GetType(), "myalert", "alert('" + eex.Message + "')", true);
                }

            }
        }
        catch (Exception ex)
        {
            lblerror.Text = "File couldn't be uploaded." + ex.Message;
            lblName.Text = string.Empty;
        }
    }
}

Answer 1

看看这个 - How to increase the max upload file size in ASP.NET?

您可以在 web.config 中更改最大请求大小 - 默认为 4Mb