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  • <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> ");
               
            }
        }

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  • 原文地址:https://www.cnblogs.com/huichao1314/p/5421128.html
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