方法一:
decimal d= decimal.Round(decimal.Parse("0.55555"),);
方法二:
Math.Round(0.55555,)
方法三:
double dbdata = 0.55555;
string str1 = dbdata.ToString("f2");//fN 保留N位,四舍五入
方法四:
string result = String.Format("{0:N2}", 0.55555);//2位 string result = String.Format("{0:N3}", 0.55555);//3位
方法五:
double s=0.55555;
result=s.ToString("#0.00");//点后面几个0就保留几位

C#保留小数位N位,四舍五入

 public string getRate(double hcount, double task)
{
string rValue;
string temp = ""; if (task == )
{
task = ;
} double db = (hcount / task) * ; if (hcount >= task)
{
rValue = "100%";
}
else
{
rValue = db.ToString("#0.#0") + "%";
}
return rValue;
} string str1 = String.Format("{0:N1}",); //result: 56,789.0
string str2 = String.Format("{0:N2}",); //result: 56,789.00
string str3 = String.Format("{0:N3}",); //result: 56,789.000
string str8 = String.Format("{0:F1}",); //result: 56789.0
string str9 = String.Format("{0:F2}",); //result: 56789.00
string str11 =( / 100.0).ToString("#.##"); //result: 567.89
string str12 =( / ).ToString("#.##"); //result: 567

C#保留小数,用toString方法

 用NumberFormatInfo类来解决:

     System.Globalization.NumberFormatInfo provider = new System.Globalization.NumberFormatInfo();

     provider.PercentDecimalDigits = ;//小数点保留几位数.
provider.PercentPositivePattern = ;//百分号出现在何处.
double result = (double) / ;//一定要用double类型.
Response.Write(result.ToString("P", provider));

C#保留小数位数,及百分号的解决方法

04-27 05:10