c# - 在 c# 中使用 file.move 时文件锁定...如何停止或修复此问题

Question

代码:

        String tempFile = Path.GetTempFileName(), read = "";
        TextReader pending = new StreamReader("c:\\pending.txt");
        TextWriter temp = new StreamWriter(tempFile);

        read = pending.ReadLine();

        while ((read = pending.ReadLine()) != null)
        {
            temp.WriteLine(read);
        }

        pending.Close();
        temp.Close();

        File.Delete("c:\\pending.txt");
        File.Move(tempFile, "c:\\pending.txt");

pending.txt 文件如果不存在则在程序启动时创建。此代码删除文件的第一行。当我调试代码时，我注意到

        File.Move(tempFile, "c:\\pending.txt");

锁定文件，我不能再写入了。

Answer 1

您应该在 using 语句中关闭您的 StreamReader 和 StreamWriter，如下所示:

String tempFile = Path.GetTempFileName(), read = "";
using(TextReader pending = new StreamReader("c:\\pending.txt"))
using(TextWriter temp = new StreamWriter(tempFile))
{

    read = pending.ReadLine();

    while ((read = pending.ReadLine()) != null)
    {
        temp.WriteLine(read);
    }
}

File.Delete(@"c:\pending.txt");
File.Move(tempFile, @"c:\pending.txt");