从指数符号转换为非指数符号

Question

I have tried:

MessageBox.Show(System.Numerics.BigInteger.Parse("7.56e+011",
          NumberStyles.Float,
          CultureInfo.InvariantCulture));

But it continues to show 7.56e+011

Answer 1

You are looking to format the number. You can use String.Format to do so

string.Format("{0:F}",System.Numerics.BigInteger.Parse("7.56e+011",
          NumberStyles.Float,
          CultureInfo.InvariantCulture))

Running the following code

Gives you the following MessageBox

you can specify no decimal points by changing it to {0:F0} for the format.

Answer 2

    decimal dec = decimal.Parse("7.7583877127496407E-6", 
    System.Globalization.NumberStyles.Any);
    Console.WriteLine(dec);

Answer 3

Try

BigInteger num = System.Numerics.BigInteger.Parse("7.56e+011",
      NumberStyles.Float,
      CultureInfo.InvariantCulture);

String text = num.ToString("F5"); // New format string, here with 5 digits. 

Your solution does an implicit conversion from BigInteger back to string again, which uses the scientific notation if the exponent is large.