<asp:FileUpload>上传一张图片并且重命名

aspx

<asp:FileUpload ID="FileUpload1" runat="server" />
           <asp:Label ID="lblImg" runat="server" Text=""></asp:Label>

cs

using System.IO;

public void getDataa()
    {
        Boolean fileOK = false;
        //获取上传的文件名 
        string fileName = this.FileUpload1.FileName;
        //获取物理路径 
        String path = Server.MapPath("~/upload/");
        //获取文件的类型
        string Extension = Path.GetExtension(FileUpload1.PostedFile.FileName);
        //判断上传控件是否上传文件 
        if (FileUpload1.HasFile)
        {
            //判断上传文件的扩展名是否为允许的扩展名".gif", ".png", ".jpeg", ".jpg" ,".bmp" 
            String fileExtension = Path.GetExtension(fileName).ToLower();
            String[] Extensions = { ".gif", ".png", ".jpeg", ".jpg", ".bmp", ".JPG" };
            for (int i = 0; i < Extensions.Length; i++)
            {
                if (fileExtension == Extensions[i])
                {
                    fileOK = true;
                }
            }
        }
        //如果上传文件扩展名为允许的扩展名，则将文件保存在服务器上指定的目录中 
        if (fileOK)
        {
            try
            {
                string NewFilePath = DateTime.Now.ToString("yyyyMMddHHmmssffff") + Extension;  //重命名图片，也可以用图片原有的名字
                this.FileUpload1.PostedFile.SaveAs(path + NewFilePath);
                //string ImgPath = "../upload/" + NewFilePath;  //获取上传好的图片的路径
                //将字符串存入数据库对应的字段即可
                lblImg.Text = "../upload/" + NewFilePath;
            }
            catch (Exception ex)
            {
                
                Response.Write("<script> alert('文件不能上传，原因：" + ex.Message+"');window.location.href=window.location.href; </script> ");
            }
        }
        else
        {

Response.Write("<script> alert('不能上传这种类型的文件');window.location.href=window.location.href; </script> ");
           
        }
    }