Formatting decimal xamarin

Question

I am new to c# and I couldn't find a way to format my numbers. I want to show only 2 digits after decimal.

namespace Dolar { public partial class MainPage : ContentPage { public MainPage() { InitializeComponent(); } private void Button_Clicked(object sender, EventArgs e) { XmlDocument doc1 = new XmlDocument(); doc1.Load("http://www.tcmb.gov.tr/kurlar/today.xml"); XmlElement root = doc1.DocumentElement; XmlNodeList nodes = root.SelectNodes("Currency"); foreach (XmlNode node in nodes) { var attributeKod = node.Attributes["Kod"].Value; if (attributeKod.Equals("USD")) { var a = node.SelectNodes("BanknoteSelling")[0].InnerText; var b = node.SelectNodes("BanknoteBuying")[0].InnerText; float c = float.Parse(a); float d = float.Parse(b); label2.Text = a; label3.Text = b; } var attributeKod1 = node.Attributes["Kod"].Value; if(attributeKod1.Equals("EUR")) { var a = node.SelectNodes("BanknoteSelling")[0].InnerText; var b = node.SelectNodes("BanknoteBuying")[0].InnerText; float c = float.Parse(a); float d = float.Parse(b); label4.Text = a; label5.Text = b; } } } } }

outputs are;

4.5173 //4.51 4.4992 //4.49 5.3131 //5.31 5.2919 //5.29

Kaj · Accepted Answer · 2018-06-08 13:17:22Z

you can format them like this :

String.Format("{0:0.00}", 4.5173); output will be // "4.51"

or : by using Math class :

float value = 4.5173; value = System.Math.Round(value,2);

StuartLC · Accepted Answer · 2018-06-08 13:19:05Z

Note that you aren't assigning your parsed float variables (c and d) to the textboxes. You can use the format specifier "0.00", like so:

var c = float.Parse(a); var d = float.Parse(b); label4.Text = c.ToString("0.00"); label5.Text = d.ToString("0.00");

You've also mixed implicit typed var variables and explicitly typed variables (e.g. float c). I would suggest sticking to var

ispiro · Accepted Answer · 2018-06-08 13:35:47Z

I would use the built in formats.

In your case it's i.ToString("F2") or even i.ToString("F2", CultureInfo.InvariantCulture) .

The 2 signifies 2 decimal places, and the F signifies the Fixed-Point Format.

See source: https://learn.microsoft.com/en-us/dotnet/standard/base-types/standard-numeric-format-strings#FFormatString

You should test this, however, as I'm not sure this is correct for Xamarin. It's for .Net.

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