1.system.globalization.numberformatinfo provider = new system.globalization.numberformatinfo();
provider.numberdecimaldigits =intdeclength; //要設定的小數字數
double strcashamt=convert.todouble(this.txtcashamt.text); //先把控制項內的值轉成double
this.txtcashamt.text = strcashamt.tostring("n",provider); //再利用tostring函式格式化小數字數
2.保留n位,四捨五入 .
decimal d= decimal.round(decimal.parse("0.55555"),2);
3.保留n位四捨五入
math.round(0.55555,2)
4,保留n位四捨五入
double dbdata = 0.55555;
string str1 = dbdata.tostring("f2");//fn 保留n位，四捨五入
5.保留n位四捨五入
string result = string.format("", 0.55555);//2位
string result = string.format("", 0.55555);//3位
6. 保留n位四捨五入 (不錯)
double s=0.55555;
result=s.tostring("#0.00");//點後面幾個0就保留幾位
c#下如果顯示保留小數字數，及百分號的解決方法:
1、用numberformatinfo類來解決:
system.globalization.numberformatinfo provider = new system.globalization.numberformatinfo();
provider.percentdecimaldigits = 2;//小數點保留幾位數.
provider.percentpositivepattern = 2;//百分號出現在何處.
double result = (double)1 / 3;//一定要用double型別.
response.write(result.tostring("p", provider));
2、用tostring方法.:
public string getrate(double hcount, double task)
double db = (hcount / task) * 100;
if (hcount >= task)
else
return rvalue;
} string str1 = string.format("",56789); //result: 56,789.0
string str2 = string.format("",56789); //result: 56,789.00
string str3 = string.format("",56789); //result: 56,789.000
string str8 = string.format("",56789); //result: 56789.0
string str9 = string.format("",56789); //result: 56789.00
string str11 =(56789 / 100.0).tostring("#.##"); //result: 567.89
string str12 =(56789 / 100).tostring("#.##"); //result: 567
C 保留小數字數的方法集錦
1.system.globalization.numberformatinfo provider new system.globalization.numberformatinfo provider.numberdecimaldigits intdeclength 要設定的小數字數 double s...
C 保留小數字數的方法集錦
c 保留小數字數的方法集錦 1.system.globalization.numberformatinfo provider new system.globalization.numberformatinfo provider.numberdecimaldigits intdeclength 要設定...
C 保留小數字數的方法集錦
1.system.globalization.numberformatinfo provider new system.globalization.numberformatinfo provider.numberdecimaldigits intdeclength 要設定的小數字數 double s...