How to get the position or line throwing exception

Nepethya Rana

I just started learning the IO class and i would like to know How to get the position or line throwing exception while reading the text file and display the message? I would be thankful if you could help me out.

4 Replies

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ali tuncer10y ago
Accepted answer
put another variable to count linenumber :
int linenumber = 1;
while(txtIn.Peek() !=-1)
{
   if(col[0].Length < 5)
   {
      //add to products..
   }
   else
   {
      Console.WriteLine(linenumber) // this line does not get included
   }
   linenumber++;
}
0
Nepethya Rana10y ago
I could not reproduce the exception i was getting but its something like this.
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Nepethya Rana10y ago
string path = @"C:\Folder\product.txt";
StreamReader txtIn = new StreamReader(
new FileStream(path, FileMode.OpenOrCreate, FileAccess.Read)
);
List ps = new List();

while(txtIn.Peek() !=-1)
{
Product p = new Product();
string row = txtIn.ReadLine();
string[] col = row.Split('*');
try
{
if(col[0].Length < 5)
{
p.Code = col[0];
p.Name = col[1];
p.Price = Convert.ToDecimal(col[2]);
ps.Add(p);
}
}
catch(Exception ex)
{
throw ex;
}
}
txtIn.Close();

foreach(var i in ps)
{
Console.WriteLine(i.Code + "\t" + i.Name+ "\t" + i.Price);
}
}
}
product.txt :
003*Tablet*600
004678*Camera*800
005*TV*500

Now since line 2 record has col[0] > 5 , its not get included. So how would i figure which line is missing now? while reading it?
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Rahul Chavan10y ago
I believe you will not get any error while reading any particular file. You will get error like file not found. Unable to read the file. You can use generic exception to identify the error.
If you are able to recreate the error then please post the code to access further.
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