Problem with reading a File

[john20]

Hi All,

I have a problem in my page. i am using below code to read the content of a file.

in the page load method i am writing this code.

Dim sLine() As String = File.ReadAllLines(sLicenseFile)


it works fine when single user access the page.

But problem occurs when another user try to access the page then it kill the prosessing of first use.


any idea why this is happening.

and if i remove this line of code then application works fine. both the user can access the application at the same time.


what else i can do to read the file. i have tried 'Streamreader' also but the same problem.

Dim objSR As StreamReader = New StreamReader(sLicenseFile)
Dim sLine As String = objSR.ReadLine()
objSR.Close()
objSR = Nothing



please shed some light on it

Thanks

-john

[DonBytes]

Been a long time since I did anything in VB but the File class has a method called OpenRead if I recall correctly.

So perhaps something like this would work:

Using objSR As StreamReader = New StreamReader(File.OpenRead(sLicenseFile))
 
End Using

and then use objSR.ReadToEnd()

Also there is a FileStream class where you can specify FileAccess which might help if the above code doesn't.

[joedeene]

Hi All,

I have a problem in my page. i am using below code to read the content of a file.

in the page load method i am writing this code.

Dim sLine() As String = File.ReadAllLines(sLicenseFile)


it works fine when single user access the page.

But problem occurs when another user try to access the page then it kill the prosessing of first use.


any idea why this is happening.

and if i remove this line of code then application works fine. both the user can access the application at the same time.


what else i can do to read the file. i have tried 'Streamreader' also but the same problem.

Dim objSR As StreamReader = New StreamReader(sLicenseFile)
Dim sLine As String = objSR.ReadLine()
objSR.Close()
objSR = Nothing



please shed some light on it

Thanks

-john

hmm, by doing "objSR = Nothing" im wondering if that cancels the "Dim objSR As StreamReader = New StreamReader(sLicenseFile)" maybe? or possibly something when you *REDIM* it as a new streamreader...

joedeene

[PRR]

"I have a problem in my page. i am using below code to read the content of a file.

in the page load method i am writing this code.

Dim sLine() As String = File.ReadAllLines(sLicenseFile)"

as long as readin a file is concerned ... simultaneously read cannot/should not cause prroblems


"it works fine when single user access the page.
But problem occurs when another user try to access the page then it kill the prosessing of first use."


" and if i remove this line of code then application works fine. both the user can access the application at the same time."


what else i can do to read the file. i have tried 'Streamreader' also but the same problem.

Dim objSR As StreamReader = New StreamReader(sLicenseFile)
Dim sLine As String = objSR.ReadLine()
objSR.Close()
objSR = Nothing

// You need not do that .... better way as DonBytes explained use using

public static void Read()
        {
            //if (b == false)
            //{
            //    Thread.Sleep(1);
            //    b = true;
            //}
 
            string s = string.Empty;
            using (StreamReader sr = new StreamReader(@"C:\1.txt"))
            {
                while (sr.Peek() >=0)
                {
                    //s = sr.ReadToEnd();
                    s = sr.ReadLine();
                    Thread.Sleep(10);
                    Console.WriteLine(s);
                }
            }
 
 
        }
 
//
// main 
 
          Thread t = new Thread(new ThreadStart(Program.Read));
 
            Thread t1 = new Thread(new ThreadStart(Program.Read));
 
            t.Start();
            t1.Start();
 
            Console.ReadLine();
 
 

Reading shouldn't be an issue....

[john20]

Hi Guys,

Many thnaks for replying. i have tried writing code with 'Using' but same problem.

Dim line As String = String.Empty
Using fs As System.IO.FileStream = New FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read)
Using reader As New StreamReader(fs)
While line IsNot Nothing
line = reader.ReadLine()
If line IsNot Nothing Then
lines.Add(line)
End If
End While
End Using
End Using

Any other suggestion will be appriciated.

Thanks

[PRR]

public void Read1()// Call with object ... dont use static....
        {
//if u use static these may get affected...
            string path = @"C:\1.txt";
            string result = string.Empty;
            String line = String.Empty;
                using(System.IO.FileStream fs   = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read))
                {
 
                    using(StreamReader reader =new  StreamReader(fs))
                    {
                        //While line IsNot Nothing
 
                        while (reader.Peek() >=0)
                        {
                            line=reader.ReadLine();
                            result += " " + line;// use string.builder
                            Thread.Sleep(100);
                        }       
 
                    }
                }
                Console.WriteLine(result);
 
        }