using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Text;
using System.Threading;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Text;
using System.Threading;
namespace Ticket2
{
public partial class FileWrite : System.Web.UI.Page
{
public static string cityPath = HttpContext.Current.Server.MapPath("~/city.txt");
{
public partial class FileWrite : System.Web.UI.Page
{
public static string cityPath = HttpContext.Current.Server.MapPath("~/city.txt");
protected void Page_Load(object sender, EventArgs e)
{
FileInfo fi = new FileInfo(cityPath);
{
FileInfo fi = new FileInfo(cityPath);
if (IsFileLocked(fi))
{
Response.Write("目前檔案被鎖住");
}
else
{
StreamWriter sw = null;
try
{
//寫入文字檔
using (sw = new StreamWriter(cityPath, false, Encoding.UTF8))
{
for (int i = 1; i <= 500; i++)
{
sw.WriteLine("city" + i);
Thread.Sleep(10);
}
}
}
catch (Exception)
{
sw.Close();
}
{
Response.Write("目前檔案被鎖住");
}
else
{
StreamWriter sw = null;
try
{
//寫入文字檔
using (sw = new StreamWriter(cityPath, false, Encoding.UTF8))
{
for (int i = 1; i <= 500; i++)
{
sw.WriteLine("city" + i);
Thread.Sleep(10);
}
}
}
catch (Exception)
{
sw.Close();
}
Response.Write("寫入完成");
}
}
fi = null;
}
}
//判斷檔案是否被鎖住
protected virtual bool IsFileLocked(FileInfo file)
{
FileStream stream = null;
protected virtual bool IsFileLocked(FileInfo file)
{
FileStream stream = null;
try
{
if (file.Exists)
{
stream = file.Open(FileMode.Open, FileAccess.ReadWrite, FileShare.None);
}
}
catch (IOException)
{
//檔案被鎖住
return true;
}
finally
{
if (stream != null) { stream.Close(); }
}
{
if (file.Exists)
{
stream = file.Open(FileMode.Open, FileAccess.ReadWrite, FileShare.None);
}
}
catch (IOException)
{
//檔案被鎖住
return true;
}
finally
{
if (stream != null) { stream.Close(); }
}
return false;
}
}
}
}
}
}
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