fileupload控件上传文件

protected void Page_Load(object sender, EventArgs e)
    {
        if (IsPostBack)
        {
            Boolean fileOK = false;
            String path = Server.MapPath("192.168.0.222/root/");
            if (file1.HasFile)
            {
                String fileExtension =
                    System.IO.Path.GetExtension(file1.FileName).ToLower();
                String[] allowedExtensions = { ".gif", ".png", ".jpeg", ".jpg" };
                for (int i = 0; i < allowedExtensions.Length; i++)
                {
                    if (fileExtension == allowedExtensions[i])
                    {
                        fileOK = true;
                    }
                }
            }

            if (fileOK)
            {
                try
                {
                    file1.PostedFile.SaveAs(path
                        + file1.FileName);
                    lbcg.Text = "File uploaded!";
                }
                catch (Exception ex)
                {
                    lbcg.Text = "文件无法上传.";
                }
            }
            else
            {
                lbcg.Text = "系统不能接受这种类型的文件！"; 
 
            }
        }

    }

各位大牛帮我看下，哪里有问题！始终文件上传不成功，但是又没有报错?
[解决办法]
为什么要写在PageLoad里面呢 建一个button出来试试
[解决办法]
单点调试，看是哪行代码出问题啊

参考http://blog.csdn.net/sweetqueen1/article/details/5897012