Question

I.m通过写入文件流创建.jpg文件：

                using (FileStream fs = new FileStream(FileName, FileMode.CreateNew, FileAccess.Write))
                {
                    fs.Write(image, 0, image.Length);
                }

我遇到的问题是，在某些情况下，文件是使用错误的访问权限创建的，更确切地说，似乎没有任何所有者。 “无法显示当前所有者。”在高级安全设置下。唯一不同的是内容本身。我究竟做错了什么？使用FileStream时设置访问权限在哪里？

这是整个代码

       public void SaveImage(string path)
    {
        try
        {
            //Get the files data
            List<byte[]> files = GetFiles();

            if (files.Count == 0)
                throw new Exception("No data");

            //Calculate the path name
            string FileDirectory = Path.GetDirectoryName(path);
            if (FileDirectory.Length > 0)
                FileDirectory += "\\";

            string FileNameBase = Path.GetFileNameWithoutExtension(path);
            string FileExtension = Path.GetExtension(path);
            string FinalFileName = "";

            if (files.Count == 1)
            {
                FinalFileName = FileDirectory + FileNameBase + FileExtension;
                while (File.Exists(FinalFileName))
                {
                    FileNameBase = FileNameBase + DateTime.Now.ToString("yyyyMMddHHmmss");
                    FinalFileName = FileDirectory + FileNameBase + FileExtension;
                }
            }
            else
            {
                FinalFileName = FileDirectory + FileNameBase + "(1)" + FileExtension;
                while (File.Exists(FinalFileName))
                {
                    FileNameBase = FileNameBase + DateTime.Now.ToString("yyyyMMddHHmmss");
                    FinalFileName = FileDirectory + FileNameBase + "(1)" + FileExtension;
                }
            }

            for (int i = 0; i < files.Count; i++)
            {
                byte[] image = files[i];
                if (files.Count > 1)
                    FinalFileName = FileDirectory + FileNameBase + "(" + (i + 1).ToString() + ")" + FileExtension;
                else
                    FinalFileName = FileDirectory + FileNameBase + FileExtension;

                if (image.Length == 0)
                    throw new Exception("No data");

                //Store the image in the specified path
                using (FileStream fs = new FileStream(FinalFileName, FileMode.CreateNew, FileAccess.Write))
                {
                    fs.Write(image, 0, image.Length);
                }
            }
        }
        catch (FaultException<string> ex)
        {
            throw new SdkException(ex.Message, ex.Code, ex.Detail);
        }
        catch (FaultException ex)
        {
            throw new SdkException(ex.Message, ex.Code, "");
        }

    }

Answer 1

也许你在文件创建不好的时候会遇到异常？您可以在此处找到有关文件系统权限的更多信息： http://msdn.microsoft.com/en-us/library/system.security.accesscontrol.filesystemrights.aspx

Filestream和windows用户权限

1 个答案: