Convert String to Integer
c#, string
Solution
Rather than using `Convert.ToInt32(string)` you should consider using `Int32.TryParse(string, out int)` instead. The TryParse methods are there to help deal with user-provided input in a safer manner. The most likely cause of your error is that the substring you are returning has an invalid string representation of an integer value.
string str = line.Substring(0,1);
int i = -1;
if (Int32.TryParse(str, out i))
{
Console.WriteLine(i);
}
Problem
Possible Duplicate: how can I convert String to Int ? Hi, I have the following problem converting string to an integer: ``` string str = line.Substring(0,1); //This picks an integer at offset 0 from string 'line' ``` So now string str contains a single integer in it. I am doing the following: ``` int i = Convert.ToInt32(str); ``` i should be printing an integer if I write the following statement right? ``` Console.WriteLine(i); ``` It compiles without any error but gives the following error on runtime: An unhandled exception of type 'System.FormatException' occurred in mscorlib.dll Additional information: Input string was not in a correct format. Any help please?