How to format a number as percentage without the percentage sign?

问题

How do I in .NET format a number as percentage without showing the percentage sign?

If I have the number 0.13 and use the format string {0:P0} the output is 13 %.

However I would like to get 13 instead, without having to multiply the number by 100 and using the format string {0:N0}.

(Background: In ASP.NET I have a GridView with a BoundField where I would like to display a number as percentage but without the percentage sign (%). How do I do that?)

Thanks for the answers. At the time of editing 4 out of 6 suggest what I would like to avoid, as explained above. I was looking for a way to use a format string only, and avoid multiplying by 100 and using {0:N0}, but the answers indicate that's impossible...

Solved by using the accepted solution by Richard:


public class MyCulture : CultureInfo
{
    public MyCulture()
        : base(Thread.CurrentThread.CurrentCulture.Name)
    {
        this.NumberFormat.PercentSymbol = "";
    }
}

Thread.CurrentThread.CurrentCulture = new MyCulture();

回答1:

Define a custom culture with its own NumberFormatInfo which returns String.Empty for its PercentSymbol property.

Then use that custom culture for impacted pages (or for the whole application). This could be done by cloning from the default so other regional settings are preserved.

回答2:

Why don't you just multiply the number by 100 and use your "{0:N0}" format string? That seems to me to be the easiest solution.

Unless you can come up with a viable reason why that's out of the question, that's my advice. It's not rocket science :-)

回答3:

but multiplying by 100 is exactly what you want!

protected void myGrdiView_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        myObjectType ot = (myObjectType)e.Row.DataItem;

        ot.myNumber = ot.myNumber * 100; // multiply by 100
    }
}

and in the HTML

<asp:BoundField DataType="myNumber" HeaderText="%" StringFormat="{0:N0}" />

回答4:

The MSDN* has this under "Custom Numeric Format Strings":

The presence of a '%' character in a format string causes a number to be multiplied by 100 before it is formatted. The appropriate symbol is inserted in the number itself at the location where the '%' appears in the format string. The percent character used is dependent on the current NumberFormatInfo class.

But the example shows that it also outputs the % sign - not what you want, but perhaps settable to nothing via the NumberFormatInfo class?

However, I agree with Pax and can't see why do don't go with the * 100 and {0:N0}

**Accessing from within Visual Studio so no link*

回答5:

How about this...

String.Format("{0:P0}",0.13).Replace("%","")

EDIT: This should work across cultures:

var percentSymbol = CultureInfo.CurrentCulture.NumberFormat.PercentSymbol;
String.Format("{0:P0}",0.13).Replace(percentSymbol,"")

There is also this solution which may be more elegant but slightly more code.

回答6:

How about a trim?

double d = .102;
string percent = d.ToString("P0").Trim(' ', '%');

回答7:

A points to consider first, a percentage displayed without a % is a number so lets ignore the percentage aspect. You want to know how to display a number that's 1 or less as 100 or less. I appreciate that it's bound so you can't modify it at display time so why not modify it at query time, i.e. SELECT (value*100) AS Percentage, ...?

回答8:

You could also try something like

string newString = "0.13".Replace("0.", string.Empty) + "%";

回答9:

Here is an example using NumberFormatInfo as @Richard suggested:

string.Format(new NumberFormatInfo { PercentSymbol = string.Empty }, "{0:0%}", 0.123); // => 12

回答10:

Here is another shorter and cleaner way to do it.

$"{rate * 100:F2}"

来源：https://stackoverflow.com/questions/939132/how-to-format-a-number-as-percentage-without-the-percentage-sign

标签

string-formatting