[c#] 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?

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

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 ));
   

yourValue.ToString("0.00") will work.

// 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.

Use string interpolation decimalVar:0.00

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);
        }

double amount = 31.245678;
amount = Math.Floor(amount * 100) / 100;

You can use this

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

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

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);

Try this:

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

Output: 24.57

Simple solution:

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

//output: 123.45

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