我有一个名为 ClientCreditResolutionPlanActionType 的 SQL 查找表,我想将其转换为 enum在 c# .
非常基本的要求,对吧?对。
我的 table ,现在enum ,但是,有多个列,或者现在,描述属性需要与它一起使用:
- 状态图标
- 状态文本
- 打字
所以我想我可以做...
namespace System.ComponentModel
{
class StatusIconAttribute : Attribute
{
public string StatusIcon;
public StatusIconAttribute(string statusIcon) { StatusIcon = statusIcon; }
}
class StatusTextAttribute : Attribute
{
public string StatusText;
public StatusTextAttribute(string statusText) { StatusText = statusText; }
}
class TypeTextAttribute : Attribute
{
public string TypeText;
public TypeTextAttribute(string typeText) { TypeText = typeText; }
}
}
...在我的Extensions.cs 类中...
public static class EnumExtensions
{
public static string GetStatusIcon(this Enum value)
{
var type = value.GetType();
string name = Enum.GetName(type, value);
if (name == null) { return null; }
var field = type.GetField(name);
if (field == null) { return null; }
var attr = Attribute.GetCustomAttribute(field, typeof(StatusIconAttribute)) as StatusIconAttribute;
if (attr == null) { return null; }
return attr.StatusIcon;
}
public static string GetStatusText(this Enum value)
{
var type = value.GetType();
string name = Enum.GetName(type, value);
if (name == null) { return null; }
var field = type.GetField(name);
if (field == null) { return null; }
var attr = Attribute.GetCustomAttribute(field, typeof(StatusTextAttribute)) as StatusTextAttribute;
if (attr == null) { return null; }
return attr.StatusText;
}
public static string GetTypeText(this Enum value)
{
var type = value.GetType();
string name = Enum.GetName(type, value);
var type = value.GetType();
string name = Enum.GetName(type, value);
if (name == null) { return null; }
var field = type.GetField(name);
if (field == null) { return null; }
var attr = Attribute.GetCustomAttribute(field, typeof(TypeTextAttribute)) as TypeTextAttribute;
if (attr == null) { return null; }
return attr.TypeText;
}
}
...最后在我的其他项目中使用它:
namespace ClientSystemServiceLibrary.Enums
{
[DataContract]
public enum ClientCreditResolutionPlanActionType
{
[EnumMember]
[TypeText("New resolution plan submitted.")]
[StatusText("New Plan")]
[StatusIcon("star.png")]
NewPlan = 1,
[EnumMember]
[TypeText("Resolution plan waiting on approval.")]
[StatusText("Under Review")]
[StatusIcon("review.png")]
UnderReview = 2,
[EnumMember]
[TypeText("Resolution plan approved.")]
[StatusText("Approved")]
[StatusIcon("check.png")]
Approved = 3,
[EnumMember]
[TypeText("Resolution plan rejected.")]
[StatusText("Rejected")]
[StatusIcon("cross.png")]
Rejected = 4,
[EnumMember]
[TypeText("New resolution plan comment submitted.")]
[StatusText("New Comment")]
[StatusIcon("message.png")]
NewComment = 5
}
}E
除了,我认为是错误的,因为我收到了这些错误消息:
'System.CompenentModel.TypeTextAttribute' is inaccessible due to its protection level
和
The type or namespace name 'TypeText' could not be found (are you missing a using directive or an assembly reference?)
所有 3 个都一样......
最佳答案
默认情况下,所有类都是内部的。如果您希望其他程序集可以访问它们,您应该指定“public”访问修饰符。像这样:
public class TypeTextAttribute : Attribute
{
public string TypeText;
public TypeTextAttribute(string typeText) { TypeText = typeText; }
}
关于c# - 如何向枚举添加多个属性?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28708537/