方法引发错误,因为文件被另一个进程访问
本文关键字:另一个 进程 访问 文件 因为 错误 方法 | 更新日期: 2023-09-27 18:11:00
此函数不起作用,因为另一个进程正在使用它。
函数必须读取文件,对其数据执行某些操作,并将结果写入该文件。
private void changeToolStripMenuItem_Click(object sender, EventArgs e)
{
LB2.Visible = true;
TB2.Visible = true;
SaveFileDialog save = new SaveFileDialog();
if (save.ShowDialog() == DialogResult.OK)
{
double maxlen;
BinaryReader read = new BinaryReader(new FileStream(save.FileName, FileMode.Open));
BinaryWriter w = new BinaryWriter(new FileStream(save.FileName, FileMode.Create));
Find(read, out maxlen);
while (read.BaseStream.Position < read.BaseStream.Length)
{
double A = read.ReadDouble();
if (A > 0)
{
read.BaseStream.Seek(-8, SeekOrigin.Current);
w.Write(Find(read, out maxlen));
}
else
w.Write(A);
}
read.BaseStream.Close();
w.BaseStream.Close();
}
}
我的心理调试感觉表明,使用的是FILE
您收到错误是因为您在创建BinaryWriter
之前没有关闭BinaryReader
而不是这个
BinaryReader read = new BinaryReader(new FileStream(save.FileName, FileMode.Open));
BinaryWriter w = new BinaryWriter(new FileStream(save.FileName, FileMode.Create));
...
read.BaseStream.Close();
w.BaseStream.Close();
做这个
BinaryReader read = new BinaryReader(new FileStream(save.FileName, FileMode.Open));
...
read.BaseStream.Close();
BinaryWriter w = new BinaryWriter(new FileStream(save.FileName, FileMode.Create));
...
w.BaseStream.Close();
您似乎打开了同一个文件两次?
BinaryReader read = new BinaryReader(new FileStream(save.FileName, FileMode.Open));
BinaryWriter w = new BinaryWriter(new FileStream(save.FileName, FileMode.Create));
BinaryReader read = new BinaryReader(new FileStream(save.FileName, FileMode.Open));
BinaryWriter w = new BinaryWriter(new FileStream(save.FileName, FileMode.Create));
相同的文件。BinaryWriter
可能会遇到异常,但我不完全确定,因为您还没有向我们展示。您需要关闭BinaryReader
,然后才能对该文件执行其他操作。
我会这样做,以确保您的流正在关闭
using( BinaryReader read = new BinaryReader(new FileStream(save.FileName, FileMode.Open)))
{
using( BinaryWriter w = new BinaryWriter(new FileStream(save.FileName, FileMode.Create)) )
{
// CODE HERE
}
}
听起来你遇到了一个例外,你没有关闭你的流媒体/读者/作者。
将其更改为:
var fs=new FileStream(save.FileName, FileMode.OpenOrCreate);
BinaryReader read=new BinaryReader(fs);
BinaryWriter w=new BinaryWriter(fs);
并删除:
w.BaseStream.Close();