C# 如何使用反射查找数据注释属性及其参数

我有一些数据注释属性，如下所示：

[StringLength(20, MinimumLength = 5, ErrorMessage = "First name must be between 5 and 20 characters")]

[StringLength(20, MinimumLength = 5, ErrorMessage = "First name must be between 5 and 20 characters")]
public string FirstName {get;set;}

如何使用反射查找数据注释属性及其参数

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谢谢

我想你有这样的东西：

[StringLength(20, MinimumLength = 5, ErrorMessage = "First name must be between 5 and 20 characters")]

[StringLength(20, MinimumLength = 5, ErrorMessage = "First name must be between 5 and 20 characters")]
public string FirstName {get;set;}

要从中获取属性和属性，请执行以下操作：

StringLengthAttribute strLenAttr = 
  typeof(Person).GetProperty("FirstName").GetCustomAttributes(
  typeof(StringLengthAttribute), false).Cast<StringLengthAttribute>().Single();


int maxLen = strLenAttribute.MaximumLength;

StringLengthAttribute strLenAttr=
typeof（Person）.GetProperty（“FirstName”）.GetCustomAttributes(
typeof（StringLengthAttribute），false.Cast（）.Single（）；
int maxLen=strLenAttribute.MaximumLength；