asp.net上传控件使用

 protected void Button1_Click(object sender, EventArgs e)
    {
        string str = "";
        if (FileUpload1.HasFile)
        {
            try
            {
                if (FileUpload1.PostedFile.ContentLength < 10240)
                {

                    FileUpload1.SaveAs("e:\\" + FileUpload1.FileName);
                    str += "上传的文件名字为" + FileUpload1.FileName + "<br/>";
                    str += "文件来自" + FileUpload1.PostedFile.FileName + "<br/>";
                    str += "文件大小" + FileUpload1.PostedFile.ContentLength + "<br/>";
                    str += "文件的类型为" + FileUpload1.PostedFile.ContentType + "<br/>";
                    Label1.Text = "文件上传成功，相应信息如下：" + str;
                }
                else
                {
                    Response.Write("<script>alert('文件大小超出范围!')</script>");
                }

            }
            catch (Exception ex)
            {
                Label1.Text = ex.Message;
            }
        }

    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        string name = FileUpload2.FileName;
        string size = FileUpload2.PostedFile.ContentLength.ToString();
        string type = FileUpload2.PostedFile.ContentType;
        string path = Server.MapPath("images\\") + name;
        string tp = name.Substring(name.LastIndexOf("."));
        if (type.Substring(0, 5) == "image")
        {
            FileUpload2.SaveAs(path);
            Label2.Text = "文件名：" + name + "<br/>" + "大小：" + size + "<br/>" + "文件类型：" + type + "<br/>" + "后缀：" + tp + "<br/>" + "保存路径：" + path + "<br/>";
        }
    }