文件上传保存文件夹而不是文件

Posted 2023-03-22

【中文标题】文件上传保存文件夹而不是文件

【英文标题】：File upload saving the folder instead of the file

【发布时间】：2022-01-15 02:32:57

【问题描述】：

我正在使用 Telerik 的 ASP.NET RadAsyncpload 将文件上传到 DB，这与普通的 fileUpload 非常相似。

我的问题是，当使用变量存储数据时，它保存为“null”。在替代方案中，我尝试使用 Server.MapPath，这是为了保存文件夹位置而不是文件。

我做错了什么？

//partial class declarations
   (...)
   string Ficheiro = string.Empty;
   string FileTipo = string.Empty;
   byte[] fileBytes = null;

//Save method, triggered by save button after upload
  public void SaveFile(object sender, EventArgs e)
    
        ListagemTimesheet model = new ListagemTimesheet();
      
        model.IDRecursoHumano = Convert.ToInt32(rdpInvestigadorE.Text);
        model.IDEstadoTimesheet = Convert.ToInt32(rcbEstado.SelectedValue);
        model.Observações = Obervaçoestxt.Text;
        model.AssinaturaTimesheet = txtAssinaturaTimesheet.Text;
        model.DataEnvio = DataEnvio.SelectedDate.Value;

        if (Objecto.ID > 0)
        
            model.ID = Convert.ToInt32(FileID.Text);

            if (!string.IsNullOrEmpty(Ficheiro) && FileTipo != null)
            

                model.FileName = Path.GetFileNameWithoutExtension(Ficheiro); //FileName
                model.FileTipo = Path.GetExtension(FileTipo); //FileExtension
                model.FileContent = fileBytes; //Content null
                model.FileContent = Encoding.ASCII.GetBytes(HttpContext.Current.Server.MapPath("~/TargetFiles/ + model.FileName")); //Content saved is location of the folder

//Upload method
public void RadAsyncUpload1_FileUploaded(object sender, FileUploadedEventArgs e)
    
        RadAsyncUpload1.Visible = false;
        Stream fileStream = e.File.InputStream;
        Ficheiro = e.File.FileName; // sintaxe metodo
        FileTipo = e.File.ContentType;
        e.IsValid = true;
        byte[] fileBytes = new byte[fileStream.Length - 1 + 1];
        fileStream.Read(dados, 0, System.Convert.ToInt32(fileStream.Length));
        fileStream.Close();
    

【参考方案1】：

您似乎正在将文件数据读入名为 dados 的局部变量中，但从未分配给全局变量。

您的文件数据最有可能进入fileBytes 变量，以使您的SaveFile 函数能够读取该值。 所以你应该将fileStream 直接读入你的fileBytes 变量中。

...
byte[] fileBytes = new byte[fileStream.Length - 1 + 1];
...

完整代码

//Save method, triggered by save button after upload
  public void SaveFile(object sender, EventArgs e)
    
        ListagemTimesheet model = new ListagemTimesheet();
      
        model.IDRecursoHumano = Convert.ToInt32(rdpInvestigadorE.Text);
        model.IDEstadoTimesheet = Convert.ToInt32(rcbEstado.SelectedValue);
        model.Observações = Obervaçoestxt.Text;
        model.AssinaturaTimesheet = txtAssinaturaTimesheet.Text;
        model.DataEnvio = DataEnvio.SelectedDate.Value;

        if (Objecto.ID > 0)
        
            model.ID = Convert.ToInt32(FileID.Text);

            if (!string.IsNullOrEmpty(Ficheiro) && FileTipo != null)
            

                model.FileName = Path.GetFileNameWithoutExtension(Ficheiro); //FileName
                model.FileTipo = Path.GetExtension(FileTipo); //FileExtension
                model.FileContent = fileBytes; // This will now be the data loaded from the filestream in your RadAsyncUpload1_FileUploaded function
                
                // This returns the path in the content because Encoding.ASCII.GetBytes simply changes the string path to a byte array
                //model.FileContent = Encoding.ASCII.GetBytes(HttpContext.Current.Server.MapPath("~/TargetFiles/ + model.FileName")); //Content saved is location of the folder

//Upload method
public void RadAsyncUpload1_FileUploaded(object sender, FileUploadedEventArgs e)
    
        RadAsyncUpload1.Visible = false;
        Stream fileStream = e.File.InputStream;
        Ficheiro = e.File.FileName; // sintaxe metodo
        FileTipo = e.File.ContentType;
        e.IsValid = true;
        
        // Read the file stream into your fileBytes variable
        byte[] fileBytes = new byte[fileStream.Length - 1 + 1];
        fileStream.Read(fileBytes, 0, System.Convert.ToInt32(fileStream.Length));
        fileStream.Close();
    

【讨论】：

不幸的是，FileContent 被保存为空。所以肯定还缺什么

我知道我犯了一个小错误，声明 fileStream.Read(dados, 0, System.Convert.ToInt32(fileStream.Length)); 应该改为 fileStream.Read(fileBytes, 0, System.Convert.ToInt32(fileStream.Length));

是的，我注意到了。我也是我的小姐。但是问题仍然存在，您对它可能是什么有其他想法？

【参考方案2】：

已解决！ 我错过了将流复制到变量fileBytes。

public void RadAsyncUpload1_FileUploaded(object sender, FileUploadedEventArgs e)
    
            RadAsyncUpload1.Visible = false; //false
            var liItem = new htmlGenericControl("li");
            Ficheiro = e.File.FileName; // sintaxe metodo
            FileTipo = e.File.ContentType;
            e.IsValid = true;
            e.File.InputStream.Position = 0;
            fileBytes = new byte[e.File.InputStream.Length];
            for (int totalBytesCopied = 0; totalBytesCopied < e.File.InputStream.Length; )
                totalBytesCopied += e.File.InputStream.Read(fileBytes, totalBytesCopied, Convert.ToInt32(e.File.InputStream.Length) - totalBytesCopied); //conversao para bytes
            e.File.InputStream.Close();

            if (File.Exists("~/App_Data/RadUploadTemp"))
            
                e.IsValid = false;
                e.File.SaveAs(Server.MapPath(
                    Path.Combine(RadAsyncUpload1.TargetFolder, e.File.GetNameWithoutExtension() + "1" + e.File.GetExtension())));