Checking if a variable is of data type double

Question

I need to check if a variable I have is of the data type double. This is what I tried:

try
{
    double price = Convert.ToDouble(txtPrice.Text);
}
c         


        

Answer 1

So if I get your question right, you mean you only want to allow numbers right? If that's true, then maybe this will help you.

string Str = textBox1.Text.Trim();
double Num;
bool isNum = double.TryParse(Str, out Num);
if (isNum)
MessageBox.Show(Num.ToString());
else
MessageBox.Show("Invalid number");