Adding Validation to our Album Forms 添加类属性的一些验证特性

Adding Validation to our Album Forms

We’ll use the following Data Annotation attributes:

• Required – Indicates that the property is a required field
• DisplayName – Defines the text we want used on form fields and validation messages
• StringLength – Defines a maximum length for a string field
• Range – Gives a maximum and minimum value for a numeric field
• Bind – Lists fields to exclude or include when binding parameter or form values to model properties
• ScaffoldColumn – Allows hiding fields from editor forms

示例：
[ScaffoldColumn(false)]   //这个就是是否自动插入隐藏值
[DisplayName("书号")] 
[Required(ErrorMessage="书号是必须的")] 
[StringLength(160)]  //长度最长为160
[Required(ErrorMessage="Price is required")] 
[Range(0.01,100.00,ErrorMessage="价格必须在 0.01-- 100.00之间")]