C# testing to see if a string is an integer?

Question

I\'m just curious as to whether there is something built into either the C# language or the .NET Framework that tests to see if something is an integer

if (x         


        

Answer 1

If you only want to check whether it's a string or not, you can place the "out int" keywords directly inside a method call. According to dotnetperls.com website, older versions of C# do not allow this syntax. By doing this, you can reduce the line count of the program.

string x = "text or int";
if (int.TryParse(x, out int output))
{
  // Console.WriteLine(x);
  // x is an int
  // Do something
}
else
{
  // x is not an int
}

If you also want to get the int values, you can write like this.

Method 1

string x = "text or int";
int value = 0;
if(int.TryParse(x, out value))
{
  // x is an int
  // Do something
}
  else
{
  // x is not an int
}

Method 2

string x = "text or int";
int num = Convert.ToInt32(x);
Console.WriteLine(num);

Referece: https://www.dotnetperls.com/parse