Summarize C # Keep decimal places

This article to introduce C # keep decimal places, may be a lot of people do not understand C # to keep decimal places, no relationship, after reading this article you must have a lot of harvest, I hope this article can teach you more things.

1. A simple example

    System.Globalization.NumberFormatInfo Provider = new System.Globalization.NumberFormatInfo ();   
    Provider. Numberdecimaldigits =intdeclength; The number of decimal digits to be set   
    strcashamt=convert.todouble (This.txtCashAmt.Text);///First turn the value in the control to double   
     
    This.txtCashAmt.Text = strcashamt.tostring ("N", provider); Using the ToString function to format decimal numbers  

The 2.c# retains the decimal bit n bit, rounded.

    Decimal d= Decimal. Round (decimal. Parse ("0.55555"), 2);  

3.c# Keep decimal bit n-bit rounded

Math.Round (0.55555,2)  

4,c# Keep decimal bit n-bit rounded

    Double dbdata = 0.55555;   
    String str1 = Dbdata. ToString ("F2");//fn keep n bit, rounded  

5.c# Keep decimal bit n-bit rounded

    string result = String.Format ("{0:n2}", 0.55555);//2-bit   
     
    String result = String.Format ("{0:n3}", 0.55555);//3-bit  

6. C # Keep decimal n-bit rounded

Double s=0.55555;   

C # preserves the number of decimal digits, and the solution for the percent semicolon:

1, with the NumberFormatInfo class to solve:

    System.Globalization.NumberFormatInfo Provider = new System.Globalization.NumberFormatInfo ();   
     
    Provider. Percentdecimaldigits = 2;//A decimal point to retain several digits.   
    Provider. Percentpositivepattern = where 2;//percent signs appear.   
    Double result = (double) 1/3;//Be sure to use double type.   
    Response.Write (Result. ToString ("P", provider));  

2, with the ToString method.:

public string getrate (double Hcount, double Task)   
{   
string rValue;   
String temp = "";   
 
if (task = = 0)   
{   
task = 1;   
}   
 
Double db = (hcount/task) *;   
 
if (Hcount >= Task)   
{   
rValue = "100%";   
}   
else   
{   
RValue = db. ToString ("#0. #0") + "%";   
}   
return rValue;   
}   
 
String str1 = String.Format ("{0:n1}", 56789); result:56,789.0   
String str2 = String.Format ("{0:n2}", 56789);//result:56,789.00   
String str3 = String.Format ("{0:n3}", 56789); result:56,789.000   
String str8 = String.Format ("{0:f1}", 56789);//result:56789.0   
String STR9 = String.Format ("{0:f2}", 56789); result:56789.00   
String str11 = (56789/100.0). ToString ("#.##"); result:567.89   
String str12 = (56789/100). ToString ("#.##"); result:567