我如何获得一个字段的自定义属性值? [英] How do I get the custom attribute value of a field?
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问题描述
我使用FileHelpers写出来的固定长度的文件。
I am using FileHelpers to write out fixed length files.
public class MyFileLayout
{
[FieldFixedLength(2)]
private string prefix;
[FieldFixedLength(12)]
private string customerName;
public string CustomerName
{
set
{
this.customerName= value;
**Here I require to get the customerName's FieldFixedLength attribute value**
}
}
}
如上图所示,我想一个访问自定义属性属性的设定方法中值。
As shown above, I would like a access the custom attribute value inside the set method of the property.
我如何做到这一点?
推荐答案
您可以做到这一点使用反射。
You can do this using reflection.
using System;
using System.Reflection;
[AttributeUsage(AttributeTargets.Property)]
public class FieldFixedLengthAttribute : Attribute
{
public int Length { get; set; }
}
public class Person
{
[FieldFixedLength(Length = 2)]
public string fileprefix { get; set; }
[FieldFixedLength(Length = 12)]
public string customerName { get; set; }
}
public class Test
{
public static void Main()
{
foreach (var prop in typeof(Person).GetProperties())
{
var attrs = (FieldFixedLengthAttribute[])prop.GetCustomAttributes
(typeof(FieldFixedLengthAttribute), false);
foreach (var attr in attrs)
{
Console.WriteLine("{0}: {1}", prop.Name, attr.Length);
}
}
}
}
有关详细信息,请参阅<一个href=\"http://stackoverflow.com/questions/3925686/retrieve-custom-attribute-parameter-values\">this
for more information please refer this
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