“进程无法访问该文件，因为它正被另一个进程使用”与图像

I've seen many issues like this that have been solved and the problem was mostly due to streams not being disposed of properly.

我已经看到很多这样的问题已经解决了,问题主要是由于流没有被妥善处理。

My issue is slightly different, here follow a code snippet

我的问题略有不同,请按照代码段进行操作

 foreach (Images item in ListOfImages)
 {
      newPath = Path.Combine(newPath, item.ImageName + item.ImageExtension);
      File.Create(newPath);

      File.WriteAllBytes(newPath, item.File);
 }

Where Images is a custom struct and item.File is the raw data, byte[].

其中Images是自定义结构和item.File是原始数据byte []。

My issue is that at the line where the WriteAllBytes is called, an exception is thrown. The message reads:

我的问题是,在调用WriteAllBytes的行中,抛出异常。消息如下:

The process cannot access the file because it is being used by another process

该进程无法访问该文件,因为该文件正由另一个进程使用

Again I have no clue how am I going to somehow close the process.

我再也不知道如何以某种方式关闭这个过程。

7 个解决方案

#1

Since File.Create returns the stream i would dispose it properly:

由于File.Create返回流,我会正确处理它:

using(var stream = File.Create(newPath)){}
File.WriteAllBytes(newPath, item.File);

or you can use the stream to write to the file directly:

或者您可以使用流直接写入文件:

using (FileStream fs = File.Create(newPath))
{
    fs.Write(item.File, 0, item.File.Length);
}

or, probably the easiest, use File.WriteAllBytes alone:

或者,可能是最简单的,单独使用File.WriteAllBytes:

File.WriteAllBytes(newPath, item.File);

Creates a new file, writes the specified byte array to the file, and then closes the file. If the target file already exists, it is overwritten.

创建一个新文件,将指定的字节数组写入该文件,然后关闭该文件。如果目标文件已存在,则会被覆盖。

#2

You state that your problem has nothing to do with disposing streams but check this MSDN article:

您声明您的问题与处理流无关,但请查看此MSDN文章:

http://msdn.microsoft.com/en-us/library/d62kzs03.aspx

What does File.Create return? A FileStream!!!!

File.Create返回什么?一个FileStream !!!!

And, at the end of the day, why are you using File.Create if File.WriteAllBytes creates a file if this doesn't exist? ;)

并且,在一天结束时,如果File.WriteAllBytes创建一个文件,如果不存在,为什么还要使用File.Create? ;)

Creates a new file, writes the specified byte array to the file, and then closes the file. If the target file already exists, it is overwritten.

创建一个新文件,将指定的字节数组写入该文件,然后关闭该文件。如果目标文件已存在,则会被覆盖。

Check it on MSDN too: http://msdn.microsoft.com/en-us/library/system.io.file.writeallbytes.aspx

也可以在MSDN上查看它:http://msdn.microsoft.com/en-us/library/system.io.file.writeallbytes.aspx

#3

using (FileStream fs = 
new FileStream(filePath,
    FileMode.Open, FileAccess.Read, FileShare.ReadWrite))

Your log may be write locked, so try with FileShare.ReadWrite.

您的日志可能被写入锁定,因此请尝试使用FileShare.ReadWrite。

#4

The create method opens the file for writing and returns a FileStream object for you to work with. Just because you are not referencing it does not mean it does not need to be returned.

create方法打开要写入的文件,并返回一个FileStream对象供您使用。仅仅因为你没有引用它并不意味着它不需要返回。

foreach (Images item in ListOfImages)
                {
                    newPath = Path.Combine(newPath, item.ImageName + item.ImageExtension);
                    FileStream f = File.Create(newPath);

                    f.Write(item.File, 0, item.File.Length);
                }

#5

The File.WriteAllBytes creates the file if necessary. You can juts use:

如有必要,File.WriteAllBytes将创建该文件。你可以使用juts:

foreach (Images item in ListOfImages)
{
    newPath = Path.Combine(newPath, item.ImageName + item.ImageExtension);
    File.WriteAllBytes(newPath, item.File);
}

And are you combine path correctly?

你正确地组合路径吗?

#6

This is the most specific way to accomplish what you are trying to do:

这是完成您要执行的操作的最具体方法:

foreach (Images item in ListOfImages)
{
    using (System.IO.FileStream output = new System.IO.FileStream(Path.Combine(newPath, item.ImageName + item.ImageExtension),
        System.IO.FileMode.Create, System.IO.FileAccess.Write))
    {
        output.Write(item.File, 0, item.File.Length);
        output.Flush();
        output.Close();
    }
}

You also need to fix your logic for creating the path, which I have done in my example above. You were concatenating the newPath over and over again.

您还需要修复用于创建路径的逻辑,这是我在上面的示例中所做的。你一遍又一遍地连接newPath。

#7

Force the garbage collector to clean.

强制垃圾收集器清理。

GC.Collect();