Leave only two decimal places after the dot

public void LoadAveragePingTime()
{
try
{
PingReply pingReply = pingClass.Send("logon.chronic-domination.com");
double AveragePing = (pingReply.RoundtripTime / 1.75);


label4.Text = (AveragePing.ToString() + "ms");
}
catch (Exception)
{
label4.Text = "Server is currently offline.";
}
}

Currently my label4.Text get's something like: "187.371698712637".

I need it to show something like: "187.37"

Only two posts after the DOT. Can someone help me out?

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最佳答案

string.Format is your friend.

String.Format("{0:0.00}", 123.4567);      // "123.46"
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// just two decimal places
String.Format("{0:0.00}", 123.4567);      // "123.46"
String.Format("{0:0.00}", 123.4);         // "123.40"
String.Format("{0:0.00}", 123.0);         // "123.00"

http://www.csharp-examples.net/string-format-double/

edit

No idea why they used "String" instead of "string", but the rest is correct.

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If you want to take just two numbers after comma you can use the Math Class that give you the round function for example :

float value = 92.197354542F;
value = (float)System.Math.Round(value,2);         // value = 92.2;

Hope this Help
Cheers

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double amount = 31.245678;
amount = Math.Floor(amount * 100) / 100;
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Alternatively, you may also use the composite operator F then indicating how many decimal spots you wish to appear after the decimal.

string.Format("{0:F2}", 123.456789);     //123.46
string.Format("{0:F3}", 123.456789);     //123.457
string.Format("{0:F4}", 123.456789);     //123.4568

It will round up so be aware of that.

I sourced the general documentation. There are a ton of other formatting operators there as well that you may check out.

Source: https://msdn.microsoft.com/en-us/library/dwhawy9k(v=vs.110).aspx

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You can use this

"String.Format("{0:F2}", String Value);"

Gives you only the two digits after Dot, exactly two digits.

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Try This

public static string PreciseDecimalValue(double Value, int DigitsAfterDecimal)
{
string PreciseDecimalFormat = "{0:0.0}";


for (int count = 2; count <= DigitsAfterDecimal; count++)
{
PreciseDecimalFormat = PreciseDecimalFormat.Insert(PreciseDecimalFormat.LastIndexOf('}'), "0");
}
return String.Format(PreciseDecimalFormat, Value);
}
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Using the property of String

double value = 123.456789;
String.Format("{0:0.00}", value);

Note: This can be used to display only.

Using System.Math

double value = 123.456789;
System.Math.Round(value, 2);
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Use string interpolation decimalVar:0.00

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Try this:

double result = Math.Round(24.576938593,2);
MessageBox.Show(result.ToString());

Output: 24.57

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Simple solution:

double totalCost = 123.45678;
totalCost = Convert.ToDouble(String.Format("{0:0.00}", totalCost));


//output: 123.45
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yourValue.ToString("0.00") will work.
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double doublVal = 123.45678;

There are two ways.

  1. for display in string:

    String.Format("{0:0.00}", doublVal );

  2. for geting again Double 

    doublVal = Convert.ToDouble(String.Format("{0:0.00}", doublVal ));

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