Question

I want to get line number of code which cause error. For example;

static void Main(string[] args)
{
    using (SqlConnection conn = new SqlConnection(bagcum))
    {
        SqlCommand cmd = conn.CreateCommand();
        cmd.CommandText = "DONTINSERT into GIVEMEERROR(CamNo,Statu) values (" + 23 + "," + 0 + ")";
        conn.Open();
        int n = cmd.ExecuteNonQuery();
    }
}

so As we know that code doesn’t work, it will throw exception Line number of code which is:

int n = cmd.ExecuteNonQuery();

So how can get that line number of using try-catch? I tried using a StackTrace class but it gives line number as 0:

static void Main(string[] args)
{
    try
    {
        using (SqlConnection conn = new SqlConnection(bagcum))
        {
            SqlCommand cmd = conn.CreateCommand();
            cmd.CommandText = "DONTINSERT into GIVEMEERROR(CamNo,Statu) values (" + 23 + "," + 0 + ")";
            conn.Open();
            int n = cmd.ExecuteNonQuery();
        }        
    }
    catch (Exception ex)
    {
        System.Diagnostics.StackTrace trace = new System.Diagnostics.StackTrace(ex, true);            
        Console.WriteLine("Line: " + trace.GetFrame(0).GetFileLineNumber());
    }
}

OUTPUT:

Line:0

Update:
Usually error line of code is 22 so I have to get that number.

Thanks

Answer 1

Try this simple hack instead:

First Add this (extension) class to your namespace(most be toplevel class):

public static class ExceptionHelper
{
    public static int LineNumber(this Exception e)
    {

        int linenum = 0;
        try
        {
            //linenum = Convert.ToInt32(e.StackTrace.Substring(e.StackTrace.LastIndexOf(":line") + 5));

            //For Localized Visual Studio ... In other languages stack trace  doesn't end with ":Line 12"
            linenum = Convert.ToInt32(e.StackTrace.Substring(e.StackTrace.LastIndexOf(' ')));

        }


        catch
        {
            //Stack trace is not available!
        }
        return linenum;
    }
}

And its done!Use LineNumber method whenever you need it:

try
{
//Do your code here
}
catch (Exception e)
{
int linenum = e.LineNumber();
}