c#Math.Round保留两位小数，结果能除尽，不保留小数点后的.00

[qq_41132238]

Math.Round(((decimal)submintNum / releaseNum) * 100, 2, MidpointRounding.AwayFromZero)
我想求大神告诉我，我想要的结果是75.00% 可是结果是75%，为什么后面的小数不见了，但是如果除不尽的话后面的两位小数是在的
例如28.67%

[娃都会打酱油了]

你转成string的代码在哪里，你round 2的话后面肯定会有2个0的

[娃都会打酱油了]

Console.WriteLine("{0}%",Math.Round(0.05m * 100, 2, MidpointRounding.AwayFromZero));

[Laplace_Primitives]

可能牵扯到一个数字的格式化输出问题

[Hello World,]

显示时候格式化，比如：(0.75).ToString("P2");

[非我莫属One]

objcet.ToString("0.00#");

[qq_41132238]

List<Task> list = TaskManager.SelectAsList(sqlStr.ToString());
List<MyTask> myTaskList = new List<MyTask>();
myTaskList = MyTaskManager.SelectFieldsAsList(string.Format("1=1"), "ObjectID,TaskID,IsSubmit,Score");

foreach (Task item in list)
{
item.ReviewedWork = myTaskList.Where(q => item.ObjectID == q.TaskID && q.IsSubmit && q.Score > 0)
.Select(q => q.ObjectID).Count();

item.WorkNum = myTaskList.Where(q => item.ObjectID == q.TaskID && q.IsSubmit).Select(q => q.ObjectID).Count();

item.WorkCompletedNum = myTaskList.Where(q => item.ObjectID == q.TaskID && q.IsSubmit).Select(q => q.ObjectID).Count();

item.WorkNotCompletedNum = myTaskList.Where(q => item.ObjectID == q.TaskID && !q.IsSubmit).Select(q => q.ObjectID).Count();

item.ScoreANum = myTaskList.Where(q => q.TaskID == item.ObjectID && q.IsSubmit && q.Score <= 100 && q.Score >= 85).Select(q => q.ObjectID).Count();

item.ScoreBNum = myTaskList.Where(q => q.TaskID == item.ObjectID && q.IsSubmit && q.Score < 85 && q.Score >= 70).Select(q => q.ObjectID).Count();

item.ScoreCNum = myTaskList.Where(q => q.TaskID == item.ObjectID && q.IsSubmit && q.Score < 70 && q.Score >= 60).Select(q => q.ObjectID).Count();

item.ScoreDNum = myTaskList.Where(q => q.TaskID == item.ObjectID && q.IsSubmit && q.Score < 60 && q.Score >= 40).Select(q => q.ObjectID).Count();
item.ScoreENum = myTaskList.Where(q => q.TaskID == item.ObjectID && q.IsSubmit && q.Score < 40 && q.Score > 0).Select(q => q.ObjectID).Count();
item.ScoreFNum = myTaskList.Where(q => q.TaskID == item.ObjectID && !q.IsSubmit && q.Score == 0).Select(q => q.ObjectID).Count();
item.TotalNum = myTaskList.Where(q => q.TaskID == item.ObjectID).Select(q => q.ObjectID).Count();
if (item.WorkCompletedNum != 0)
{
item.ScoreARatio = Math.Round(((double)item.ScoreANum / item.WorkCompletedNum) * 100, 2);
item.ScoreBRatio = Math.Round(((double)item.ScoreBNum / item.WorkCompletedNum) * 100, 2);
item.ScoreCRatio = Math.Round(((double)item.ScoreCNum / item.WorkCompletedNum) * 100, 2);
item.ScoreDRatio = Math.Round(((double)item.ScoreDNum / item.WorkCompletedNum) * 100, 2);
item.ScoreERatio = Math.Round(((double)item.ScoreENum / item.WorkCompletedNum) * 100, 2);

}
item.ScoreFRatio = -1;
if (item.TotalNum != 0)
{
item.ScoreFRatio = Math.Round(((double)item.ScoreFNum / item.TotalNum) * 100, 2);
}
}
result.aaData = list;
return JsonHelper.ToJson(result);

[qq_41132238]

我转的是json，并不是string

[娃都会打酱油了]

那就是json将0去除了，无所谓的，毕竟json无法区别是float,double还是decimal，如果你那么在意后面的0，直接返回字符串就行了

[qq_41132238]

好的，谢谢