This is my string
string test = "255\r\n\r\n0\r\n\r\n-1\r\n\r\n255\r\n\r\n1\r";
In order to find n1 in this string I have to do this:
string test = @"255\r\n\r\n0\r\n\r\n-1\r\n\r\n255\r\n\r\n1\r";
But what if I declared my string like this as its content came from a text box:
string test = this.textbox.Text.ToString();
How would I then find n1 in the same scenario as the example above as the code below does not work.
string test = @this.textbox.Text.ToString();
Use Regex
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
string test1 = "255\r\n\r\n0\r\n\r\n-1\r\n\r\n255\r\n\r\n1\r";
string test2 = @"255\r\n\r\n0\r\n\r\n-1\r\n\r\n255\r\n\r\n1\r";
Console.WriteLine("First String");
MatchCollection matches = Regex.Matches(test1, @"\d+", RegexOptions.Singleline);
foreach (Match match in matches)
{
Console.WriteLine(match.Value);
}
Console.WriteLine("Second String");
matches = Regex.Matches(test2, @"\d+", RegexOptions.Singleline);
foreach (Match match in matches)
{
Console.WriteLine(match.Value);
}
Console.ReadLine();
}
}
}
In C# the @ symbol using for verbatim strings. Only when writing literals.
No need to apply it to variables. Just write:
string test = this.textbox.Text;
Please note that the ToString() call is not required.
sting"\n" is one character, so there is no "n1" there. So what exactly are you looking for? a newline followed by a 1?