ASP.NET:System.UnauthorizedAccessException - 访问路径被拒绝

Question

我有一个 ASP.NET Web 应用程序，它执行以下操作:

1. 读取 Excel 文件。
2. Excel 文件中会有一个图像 URL，该 URL 指向互联网上的某个位置。
3. 程序读取每个图像 URL 并将其存储到网络服务器中的临时文件夹中。
4. 然后应用程序会调整图像的大小(更改宽度和高度)。

5. 最后，应用程序会将图像保存到另一个文件夹。

   我遇到以下异常:

System.Net.WebException: An exception occurred during a WebClient request. ---> System.UnauthorizedAccessException: Access to the path '\abcserver\target03\3111\35644\www.testing.com\web\content\images\TempStorage\tempImage.jpg' is denied. at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy) at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access) at System.Net.WebClient.DownloadFile(Uri address, String fileName) --- End of inner exception stack trace ---
at ProcessImage.GetFileFromUrl(String imageFileUrl, String newFileName)
at uploadexceldata.UploadExcelData(String fileName)

 foreach (DataRow dr in dt.Rows) // Reading each excel row
            {

                if (dr[0].ToString() != "")
                {
                    id= "";
                    path = "";
                    manuId = "";


                    id= dr[0].ToString();
                    path = dr[1].ToString();
                    fileNameOnly = iProImg.GetFileNameOnly(path);
                    objDb.openConnection();
                    strSqlGroupInfo = "select ManufacturerID from  manufacturers where id='" + id+ "'";

                    dTblManu = objDb.BuildDT(strSqlGroupInfo); // To Fill data to Datatable
                    objDb.closeConnection();
                    if (dTblManu.Rows.Count > 0)
                    {
                        manuId = dTblManu.Rows[0][0].ToString();
                    }

                    if (manuId != "")
                    {
                        tempUploadPath = "images/TempStorage/";
                        tempUploadPath = Server.MapPath(tempUploadPath);
                        if (!Directory.Exists(tempUploadPath))
                        {
                            Directory.CreateDirectory(tempUploadPath);
                        }
                        tempFilePath = tempUploadPath + "\\tempImage.jpg";
                        tempFilePath = tempFilePath.Replace("/", "\\");

                        previewPath = Server.MapPath("images/previews/" + manuId);
                        thumbNailPath = Server.MapPath("images/thumbnails/" + manuId);

                        if (!Directory.Exists(previewPath))
                        {
                            Directory.CreateDirectory(previewPath);
                        }
                        if (!Directory.Exists(thumbNailPath))
                        {
                            Directory.CreateDirectory(thumbNailPath);
                        }
                        fileNameOnly = "\\preview" + id+ ".jpg";
                        fileNameOnly = fileNameOnly.Replace("/", "\\");
                        previewPath = previewPath + fileNameOnly;
                        tempPartialPathP = "images\\previews\\" + manuId + fileNameOnly;

                        fileNameOnly = "\\thumbnail" + id+ ".jpg";
                        thumbNailPath = thumbNailPath + fileNameOnly;
                        tempPartialPathT = "images\\thumbnails\\" + manuId + fileNameOnly;


                        try
                        {

                            iProImg.GetFileFromUrl(path, tempFilePath);
                            rowCounter++;
                            iProImg.ReSizeImage(tempFilePath, previewPath, previewSize);
                            iProImg.ReSizeImage(previewPath, thumbNailPath, thumbNailSize);

                        }
                        catch (Exception ec)
                        {

                            errorRowCount++;
                            iLog.LogErrorToFile("uploadExcel", ec.ToString(), "path : " + path + ",tempFilePath :" + tempFilePath);


                        }
                        finally
                        {
                            if(File.Exists(tempFilePath))
                            {
                            File.Delete(tempFilePath);
                            }
                        }
                    } // If manuid!=""
                }  //if (dr[0].ToString() != "")

有人对如何解决此异常有任何建议吗？

Answer 1

尝试将您读取/保存文件的 .Net 用户的访问权限设置为“完全控制”。