如何查找屬性的值

Question

如何查找屬性的值？我需要檢查該值並將文本框maxlength設置爲該值。以下是我希望檢索的值的示例。

public class DogClass 
    { 
     [StringLength(5)] 
     public string LegalName 
     { 
     } 

Answer 1

您可以使用反射來獲取此信息。下面是一個應該讓你開始的片段。

protected void GetStringLength(object objDog) { 
    // loop through each property in object 
    foreach (PropertyInfo pi in objDog.GetType().GetProperties()) 
    { 
     // for each object property, get the SringLength tag (if there is one) 
     foreach (Attribute attribute in Attribute.GetCustomAttributes(pi, typeof(StringLengthAttribute), true)) 
      { 
       // we'll assume there is only one 
       var stringLenVal = (attribute as StringLengthAttribute).MaximumLength; 
       break; 
      } 
    } 
}