ASP.NET实现上传文件并修改其文件名

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原作者: [db:作者] 来自: [db:来源] 收藏邀请

<body>
<form >
四张图片的文件名为pic1,pic2,pic3,pic4
我上传的图片需要改成其中一张, 思路是先通过上传到服务器这些图片所在的文件夹IMAGE中，然后再修改文件名。
修改文件名的思路是先COPY在删除源文件。
后台代码如下：先要引用SYSTEM.IO

protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            imagebind();

        }

    }
    private void imagebind()
    {
        Image1.ImageUrl = "image/pic1.jpg";
        Image2.ImageUrl = "image/pic2.jpg";
        Image3.ImageUrl = "image/pic3.jpg";
        Image4.ImageUrl = "image/pic4.jpg";
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        tihuan(FileUpload1, "pic1.jpg");
    }
    protected void Button3_Click(object sender, EventArgs e)
    {
        tihuan(FileUpload2, "pic2.jpg");
    }
    protected void Button4_Click(object sender, EventArgs e)
    {
        tihuan(FileUpload3, "pic3.jpg");
    }
    protected void Button5_Click(object sender, EventArgs e)
    {
        tihuan(FileUpload4, "pic4.jpg");
    }
    private void tihuan(FileUpload myFileUpload,string newname)
    {
        bool b = Upload(myFileUpload); //
        if (!b)
        {
            return;
        }
        string OrignFile, NewFile;
        OrignFile = Server.MapPath(".") + "\\image\\"+myFileUpload.FileName;
        NewFile = Server.MapPath(".") + "\\image\\"+newname;
       File.Copy(OrignFile, NewFile, true);
        File.Delete(OrignFile);
    }
    private bool Upload(FileUpload myFileUpload)
    {
        bool flag = false;
        //是否允许上载
        bool fileAllow = false;
        //设定允许上载的扩展文件名类型
        string[] allowExtensions = { ".jpeg", ".gif", ".bmp", ".png", ".jpg", ".tiff" };

        //取得网站根目录路径
        string path = HttpContext.Current.Request.MapPath("image/");
        //检查是否有文件案
        if (myFileUpload.HasFile)
        {
            //myFileUpload.FileName = "pic1111111.jpg";
            //取得上传文件之扩展文件名，并转换成小写字母
            string fileExtension = System.IO.Path.GetExtension(myFileUpload.FileName).ToLower();
            //检查扩展文件名是否符合限定类型
            for (int i = 0; i < allowExtensions.Length; i++)
            {
                if (fileExtension == allowExtensions[i])
                {
                    fileAllow = true;
                }
            }

            if (fileAllow)
            {
                try
                {
                    //存储文件到文件夹
                    myFileUpload.SaveAs(path + myFileUpload.FileName);
                    flag = true;
                }
                catch (Exception ex)
                {
                    PubClass.ShowMessageBox(Page, ex.Message);
                    flag = false;
                }
            }
            else
            {
                PubClass.ShowMessageBox(Page, "不允许上载：" + myFileUpload.PostedFile.FileName + "，只能上传图片文件，请检查！");

                flag = false;
            }
        }
        else
        {
            PubClass.ShowMessageBox(Page, "请选择要上传的图片文件!");
            flag = false;
        }
        return flag;
    }

最关键的语言：
    string OrignFile, NewFile;
        OrignFile = Server.MapPath(".") + "\\image\\"+myFileUpload.FileName;
        NewFile = Server.MapPath(".") + "\\image\\"+newname;
       File.Copy(OrignFile, NewFile, true);
        File.Delete(OrignFile);
代码很简单，想法也很清楚。
请高手给给更简单的方式实现文件上传并修改文件名。谢谢