C#的中括号意思[DateTimeRange]public DateTime?PostTime{get{return _PostTime;}set{if (_PostTime = value){_PostTime = value;OnPropertyChanged("PostTime");}}}//public class DateTimeRange :ValidationAttribute{public override bool IsValid(object valu
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![C#的中括号意思[DateTimeRange]public DateTime?PostTime{get{return _PostTime;}set{if (_PostTime = value){_PostTime = value;OnPropertyChanged(](/uploads/image/z/54981-45-1.jpg?t=C%23%E7%9A%84%E4%B8%AD%E6%8B%AC%E5%8F%B7%E6%84%8F%E6%80%9D%5BDateTimeRange%5Dpublic+DateTime%3FPostTime%7Bget%7Breturn+_PostTime%3B%7Dset%7Bif+%28_PostTime+%3D+value%29%7B_PostTime+%3D+value%3BOnPropertyChanged%28%22PostTime%22%29%3B%7D%7D%7D%2F%2Fpublic+class+DateTimeRange+%3AValidationAttribute%7Bpublic+override+bool+IsValid%28object+valu)
C#的中括号意思[DateTimeRange]public DateTime?PostTime{get{return _PostTime;}set{if (_PostTime = value){_PostTime = value;OnPropertyChanged("PostTime");}}}//public class DateTimeRange :ValidationAttribute{public override bool IsValid(object valu
C#的中括号意思
[DateTimeRange]
public DateTime?PostTime
{
get
{
return _PostTime;
}
set
{
if (_PostTime = value)
{
_PostTime = value;
OnPropertyChanged("PostTime");
}
}
}
//
public class DateTimeRange :ValidationAttribute
{
public override bool IsValid(object value)
{
var datetime = value as DateTime?;
if (datetime.HasValue && datetime.Value > DateTime.Today)
return false;
return true;
}
public override string FormatErrorMessage(string name)
{
return "输入的时间超出范围!";
}
}
第一行中括号的用法及意义
C#的中括号意思[DateTimeRange]public DateTime?PostTime{get{return _PostTime;}set{if (_PostTime = value){_PostTime = value;OnPropertyChanged("PostTime");}}}//public class DateTimeRange :ValidationAttribute{public override bool IsValid(object valu
[DateTimeRange] 添加C#特性
public class DateTimeRange :ValidationAttribute 使得 DateTimeRange 继承了 ValidationAttribute 所以现在 DataTimeRange特性就具有了自定义验证功能