正在使用的文件即使使用close(), append也不能工作
本文关键字:append 也不能 工作 文件 close | 更新日期: 2023-09-27 17:53:29
我一直试图写这个为了列出我的文件夹,追加部分不起作用,它重写了整个东西,如果我试图列出其他东西而不退出应用程序,它会给出"文件正在使用"错误这对我来说没有意义,因为我在每个循环结束时使用close()。
我检查了几乎所有的微软文档和大量的帖子,但还是没有找到我的答案。
显示错误的图片
提前感谢!
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
namespace Anime_Lister
{
public partial class Anime0Lister : Form
{
public void Appen()
{
using (System.IO.StreamWriter file = new System.IO.StreamWriter(path0save.Text, true))
{
DirectoryInfo directory = new DirectoryInfo(path0tb.Text);
DirectoryInfo[] directory0Arr = directory.GetDirectories();
foreach (DirectoryInfo dir in directory0Arr)
{
String Parent = Convert.ToString(dir.Parent);
String Name = Convert.ToString(dir.Name);
String Root = Convert.ToString(dir.Root);
File.AppendAllText(path0save.Text, Parent);
File.AppendAllText(path0save.Text, " || ");
File.AppendAllText(path0save.Text, Name + System.Environment.NewLine);
File.AppendAllText(path0save.Text, Root + System.Environment.NewLine);
}
}
}
public void Writer()
{
using (System.IO.StreamWriter file = new System.IO.StreamWriter(path0save.Text))
{
DirectoryInfo directory = new DirectoryInfo(path0tb.Text);
DirectoryInfo[] directory0Arr = directory.GetDirectories();
foreach (DirectoryInfo dir in directory0Arr)
{
String Parent = Convert.ToString(dir.Parent);
String Name = Convert.ToString(dir.Name);
String Root = Convert.ToString(dir.Root);
file.Write(Parent);
file.Write(" || ");
file.WriteLine(Name);
file.WriteLine(Root);
}
}
}
public void Browser()
{
FolderBrowserDialog address = new FolderBrowserDialog();
if (address.ShowDialog() == System.Windows.Forms.DialogResult.OK)
path0tb.Text = address.SelectedPath;
}
public void Browser2()
{
if (saveFileDialog1.ShowDialog() == DialogResult.OK)
{
path0save.Text = saveFileDialog1.FileName;
}
}
public Anime0Lister()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
//_____________________________________________________________List
{
try
{
if (existing0file.Checked == true)
{
Appen();
}
else
{
Writer();
}
}
catch (Exception Fail)
{
MessageBox.Show(Fail.Message);
}
}
}
}
}
像StreamWriter
这样的一次性对象应该总是包含在Using语句中,以确保即使在发生异常的情况下,该对象也被关闭,其未管理的资源被释放以供重用。该语言为您提供了一个特定的语句,(使用语句),但是,在您的具体情况下,如果您使用StreamWriter
打开文件,那么您不能使用File.AppendAllText
,因为此方法试图自己打开文件并发现它"在使用中"由先前打开的StreamWriter
public void Appen()
{
using(System.IO.StreamWriter file = new System.IO.StreamWriter(path0save.Text, true))
{
DirectoryInfo directory = new DirectoryInfo(path0tb.Text);
DirectoryInfo[] directory0Arr = directory.GetDirectories();
foreach (DirectoryInfo dir in directory0Arr)
{
// No need for those Convert.ToString.
// The DirectoryInfo properties used are already strings.
file.Write(dir.Parent);
file.Write(" || ");
file.WriteLine(dir.Name);
file.WriteLine(dir.Root);
// or just in one line
//file.WriteLine(string.Concat(dir.Parent,
// " || ",
// dir.Name,
// Environment.NewLine,
// dir.Root));
}
}
}