Reputation: 1112

How to keep zero decimal place for zero?

I used:

Result_TextBox.Text = result.ToString(".#######");  //result is double

But if the result is 100.0000000, it becomes 100. What should I use in order to keep the accuracy of 7 decimals place?

I tried:

Result_TextBox.Text = Math.round(result, 7);  //but this is effective at all, why?

Please help

Update: can someone explain "#" and "0"?

Upvotes: 0

Answers (4)

Reputation: 2057

There is a Standard numeric format strings for that.
You can use The Fixed-Point ("F") Format Specifier followed by a number to define the number of decimal digits.

Console.WriteLine(100.ToString("F7"));
// -> 100.0000000

Console.WriteLine(100.ToString("F3"));
// -> 100.000

Upvotes: 0

Reputation: 28771

This works

Result_TextBox.Text = result.ToString("#.0000000");

Upvotes: 2

Reputation: 3792

Use:

Result_TextBox.Text = result.ToString("0.0000000");

The second line doesn't work because you're trying to assign a numeric data type to a string without conversion.

Upvotes: 2

Reputation: 1333

Try:

result.ToString("0.0000000")

Upvotes: 1