I am trying to open a txt file in a project using the .openfile command within the IO namespace, this works fine but when I try and use it on a file that is being written to it wont let me!! That is understandable but notepad seems to manage it!! Can I do this by opening it in read only mode or something??
File Access
- Thread starter Leeus
- Start date
You shouldnt have a problem. This works
C#:
//my own messagebox and own Read File method:
a.MB.ShowDialog(a.Files.ReadText("D:\\test.txt"));
//the Read File method in class a, class Files (my own classes):
/// <summary>
/// Reads a text file from disk.
/// </summary>
public static string ReadText(string path)
{
string s="";
Stream F=new FileStream(path, FileMode.Open, FileAccess.Read);
if(F.Length> long.MaxValue)
{
int onebyte= 0;
int bytesR= 0;
byte[]c= new Byte[ulong.MaxValue];
while(true)
{
onebyte= F.ReadByte();
if(onebyte==-1) {F.Close(); s= Encoding.ASCII.GetString(c, 0, c.Length); return s;}
c[bytesR]= (byte)onebyte; ++bytesR;
}
}
if(F.Length> int.MaxValue)
{
int onebyte= 0;
int bytesR= 0;
byte[]c= new Byte[F.Length];
while(true)
{
onebyte= F.ReadByte();
if(onebyte==-1) {F.Close(); s= Encoding.ASCII.GetString(c, 0, c.Length); return s;}
c[bytesR]= (byte)onebyte; ++bytesR;
}
}
byte[]b=new Byte[F.Length];
F.Read(b, 0, Convert.ToInt32(F.Length));
s= Encoding.ASCII.GetString(b);
F.Close();
return s;
}
PlausiblyDamp
Administrator
Notepad opens the file, reads it in and then closes the file straight away - this stops it keeping the file locked.
The file we are talking about is a 1.3 gig text file, notepad takes an age to open it!
I cant see how to adapt it for my code??
And then I have to do a readline to read the text file in, this is within a look until readline = nothing
I cant see how to adapt it for my code??
Code:
txtfilename.Text = txttype.Text & txtdate.Text & ".LOG"
Dim filelocation As String = "c:\mail\Log\" & txtfilename.Text
Dim sr As New System.IO.StreamReader(filelocation)And then I have to do a readline to read the text file in, this is within a look until readline = nothing
Notepad takes ages but opens the file the VB program gives this error!
"The process cannot access the file "c:\mail\Log\PT030928.LOG" because it is being used by another process." I have adapted the code as follows but still doesnt work!
"The process cannot access the file "c:\mail\Log\PT030928.LOG" because it is being used by another process." I have adapted the code as follows but still doesnt work!
Code:
Dim sr As New StreamReader(New FileStream(filelocation, FileMode.Open, FileAccess.Read))PlausiblyDamp
Administrator
have you tried
Code:
Dim sr As New StreamReader(New FileStream(filelocation, FileMode.Open, FileAccess.Read, FileShare.Read ))tuningd
Member
I dont know it is possible but could you copy the file and open the copied version that is not being written to?
