问题描述
我有一个属性，我想将文本从资源文件加载到属性中.
I have an attribute and i want to load text to the attribute from a resource file.
[IntegerValidation(1, 70, ErrorMessage = Data.Messages.Speed)]
private int i_Speed;
但我不断得到"属性参数必须是属性参数类型的常量表达式、typeof表达式或数组创建表达式"
But I keep getting "An attribute argument must be a constant expression, typeof expression or array creation expression of an attribute parameter type"
如果我添加一个字符串而不是 Data.Messages.Text，它会完美运行，例如:
It works perfectly if i add a string instead of Data.Messages.Text, like:
[IntegerValidation(1, 70, ErrorMessage = "Invalid max speed")]
有什么想法吗?
推荐答案
编译时属性值被硬编码到程序集中.如果你想在执行时做任何事情，你需要使用一个常量作为key，然后将一些代码放入属性类本身来加载资源.
Attribute values are hard-coded into the assembly when you compile. If you want to do anything at execution time, you'll need to use a constant as the key, then put some code into the attribute class itself to load the resource.
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