How to round currency in gridview to significant figures?

Question

I have a gridview pulling from a SQL table and it contains varying dollar figures. They're in thousands, millions or billions. I'm currently using {0:c0} but I'm interested in slimming this down so that I will show only three significant figures.

For instance, I'd like $3,411,216,512.07 to display as $3.41B; while $1,066,555.54 would be displayed as $1.07M.

Is there a simple way to do this in ASP.NET or do I need to break out the jQuery? Or alternatively, should I do it in C# OnRowDataBound?

Answer 1

您可以将数字转换为字符串，抓取前四个字符（假设是无单位，逗号等的纯数字），将其转换回数字，四舍五入，然后计算原始字符串的长度，以确定在哪里放置小数点以及用什么标记，例如B，M，K等。我建议在服务器端进行设置，除非您想在浏览器中执行此操作，否则我认为这样做没有意义它以某种方式互动。

Answer 2

I'd do it in OnRowDataBound. Check to see if your number is bigger than a billion, divide it by a billion, string.format a "B" on the end of it and the currency symbol on the front then return. Check to see if the number is greater than a million... etc

You could probably write an algorithm to dynamically handle it, but as this is money and it's probably limited to trillions doing it manually should be much faster.

Answer 3

    if(n>999999)
    {
    string number = Convert.ToString(n.slice[0,3]) + "M";
    ... 
//> (apply it to your datatable and then show it (in datagridview if that's
//> what you're using)
    }
   else if (n>...)

Repeat that for cases where it's over a Bilion,etc but there is still the need to check where the comma is going to be. I'm not sure how to do it. That's just how you can get the first 3 numbers as you wanted and applying "B" or "M".