How Do I Convert Strings To Int

You have two options: use, as suggested, the TryParse methods, or handle the thrown exceptions. In either ways you should explicitely deal with possible invalid user inputs. For instance, you may show a message box explaining what are the format requirements for the given field.

int value;
if (Int32.TryParse("50", out value))
    Console.WriteLine(value);
else
    Console.WriteLine("Failed to parse the string value to integer.");

In addition to other answer like using TryParse, you also have to ensure that proper local. For example, if system decimal separator don't match separayor used in text box, you might get an exception (or wrong number if decimal separator is interpreted as thousand separator).

By the way, you have to tell us the text you used and if any locale is configured or you used the system one in which case, you have to know the language/region set in control panel.

http://www.dotnetperls.com/int-parse[^]


It may helps You,

Based on: .NET 4.5

C# program that uses int.Parse

using System;

class Program
{
static void Main()
{
// Convert string to number.
string text = "500";
int num = int.Parse(text);
Console.WriteLine(num);
}
}

int num = 5;
string str = num.ToString();

//It will work

try
{
int Hour=Convert.ToInt32(txtHour.Text.ToString());
int Min=Convert.ToInt32(txtMin.Text.ToString());
int Sec=Convert.ToInt32(txtSec.Text.ToString());
}
catch(Exception e)
{
Label1.Text="InValid Number";
}

Although I imagine your beginner since you ask that kind of question, and for beginners it might be irrelevant, but I would go with what JIGAR DAK said (Solution 9) because Convert.ToInt32() is way faster than int.Parse() or int.TryParse()