在 .NET 中更改文件上载时的文件名 (asp)

本文关键字：文件名 asp 上载 NET 文件 | 更新日期: 2023-09-27 17:57:11

如何在上传时更改文件名？

我有这样的代码：

<%@ WebHandler Language="C#" Class="Upload" %>
using System;
using System.Web;
using System.IO;
public class Upload : IHttpHandler {
   public void ProcessRequest(HttpContext context) {
       HttpPostedFile oFile = context.Request.Files["Filedata"];
     string newFileName1 = HttpContext.Current.Server.MapPath(@context.Request["orderID"]);
     string newFileName2 = HttpContext.Current.Server.MapPath(@context.Request["productCombinationString"]);
     string newName;
       if(newFileName2 != "" && newFileName2 != null && newFileName2 != "<!--@Ecom:productCombinationString-->") {
           newName = newFileName1 + newFileName2 + oFile.ContentType;
       } else {
           newName = newFileName1 + oFile.ContentType; 
       }
     string sDirectory = HttpContext.Current.Server.MapPath(@context.Request["folder"]);
     oFile.SaveAs(sDirectory + "/" + oFile.FileName);
     if (!Directory.Exists(sDirectory)) Directory.CreateDirectory(sDirectory);
     context.Response.Write("1");
   }
   public bool IsReusable {
      get { return false; }
   }
}

如果我将 oFile.文件名更改为新名称，它不起作用......问题出在哪里？:)谢谢

在 .NET 中更改文件上载时的文件名 (asp)

您可以将自定义文件名与目录一起传递给SaveAs方法

oFile.SaveAs(sDirectory + "/" + "abc");

尝试：

 // Get the extension of the uploaded file.
 string fileName = Server.HtmlEncode(FileUpload1.FileName);
   string extension = System.IO.Path.GetExtension(fileName);
 string newName;
       if(newFileName2 != "" && newFileName2 != null && newFileName2 != "<!--@Ecom:productCombinationString-->") {
           newName = newFileName1 + newFileName2 + extension ;
       } else {
           newName = newFileName1 + extension ; 
       }
    oFile.SaveAs(sDirectory + "/" + newName );

我没有尝试过这段代码，但我确实想指出原始代码中的两件事：

第一个是这个操作顺序：

 oFile.SaveAs(sDirectory + "/" + oFile.FileName);
 if (!Directory.Exists(sDirectory)) Directory.CreateDirectory(sDirectory);

我相信应该是这个。 在上面的序列中，存在保存到不存在的文件夹中的潜在边缘情况。 这可确保创建文件夹：

 if (!Directory.Exists(sDirectory))
 {
      Directory.CreateDirectory(sDirectory);
 }
 oFile.SaveAs(sDirectory + "/" + oFile.FileName);

另一件事是您可能会遇到/作为路径分隔符的问题。我认为做这样的事情应该安全得多：

 var saveLocation = Path.Combine(sDirectory, oFile.FileName);
 oFile.SaveAs(saveLocation);

我希望这有帮助！

这是我

在保存图像时使用的示例，请查看"另存为"部分

////saving file in the physical folder;
FileUpload FileUpload1 = file_Image;
string virtualFolder = "~/Resourceimages/";
string physicalFolder = HostingEnvironment.MapPath(virtualFolder);
string PhotoName = ((string)Session["UserName"] + (string)Session["UserSurname"]);
FileUpload1.SaveAs(physicalFolder + PhotoName + FileUpload1.FileName);
string location = virtualFolder + PhotoName + FileUpload1.FileName;
webservice.UpdateResourceImage((int)Session["UserID"], location);
lbl_Result.Text = "Your file " + FileUpload1.FileName + " has been uploaded.";
Image1.Visible = true;
Image1.ImageUrl = location;

string uploadFolder = Request.PhysicalApplicationPath + "UploadFile''";
        if (FileUpload1.HasFile)
        {
            string extension = Path.GetExtension(FileUpload1.PostedFile.FileName);
            FileUpload1.SaveAs(uploadFolder + "Test"+ extension);
            Label1.Text = "File uploaded successfully as: " + "Test"+ extension;
        }
        else
        {
            Label1.Text = "First select a file.";
        }

private string UpdateFilename(string filename)
    {
        try
        {
            filename = Server.HtmlEncode(FUJD.FileName);
            string extension = System.IO.Path.GetExtension(filename);
            filename = filename.Replace(extension, "");
            return filename + '-' + DateTime.Now.ToString("yyyyMMddHHmmss") + extension;
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }
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