Question

hi i have the following code:

        private void Textparsing()
        {               
            using (StreamReader sr = new StreamReader(Masterbuildpropertiespath))                 
            {                    
                String line;
                line = sr.ReadLine();
                while ((line != null))
                {
                    if (line.StartsWith("Exec_mail"))
                    {
                        ExecmailCheckBox.IsChecked = true;
                    }
                }                 
            }
}

When i use this function, it seems that the application just hangs there without doing anything. Is this something wrong with the while loop here?

EDIT 1:

the code i am using now has the error: ‘System.IO.StreamReader’ does not contain a definition for ‘Readline’ and no extension method ‘Readline’ accepting a first argument of type ‘System.IO.StreamReader’ could be found

code:

        private void Textparsing()
        {               
            using (StreamReader sr = new StreamReader(Masterbuildpropertiespath))                 
            {                    
                    while (sr.Peek() >= 0)
                    {
                        if (sr.Readline().StartsWith("Exec_mail"))
                        {
                            ExecmailCheckBox.IsChecked = true;
                        }
                    }              
            }               
}

error is found in this line:

if (sr.Readline().StartsWith("Exec_mail"))

Answer 1

Use StreamReader.Peek() to determine the end of file:

private void Textparsing()
{
    using (StreamReader sr = new StreamReader(Masterbuildpropertiespath))
    {
        while (sr.Peek()>=0)              
        {
            if (sr.ReadLine().StartsWith("Exec_mail"))
            {
                ExecmailCheckBox.IsChecked = true;   
            }
        }
    }
}

EDIT:

I ran the code with a sample text file located at D:\aa.txt with 4 lines of text in it as:
Exec_mail
abcd
Exec_mail
efgh
Exec_mail

using this code:

private void Textparsing()
{
    using (StreamReader sr = new StreamReader(@"D:\aa.txt")) 
    {
        while (sr.Peek() >= 0)
        { 
            if (sr.ReadLine().StartsWith("Exec_mail")) 
            {
                MessageBox.Show("yes");
            } 
        } 
    } 
}

And it showed yes three times.