[英]Pass in an enum as a method parameter
我宣布了一個枚舉:
public enum SupportedPermissions
{
basic,
repository,
both
}
我也有像這樣的POCO:
public class File
{
public string Id { get; set; }
public string Name { get; set; }
public string Description { get; set; }
public SupportedPermissions SupportedPermissions { get; set; }
}
現在我想創建一個方法,我可以用它來創建一個新的File對象:
public string CreateFile(string id, string name, string description, Enum supportedPermissions)
{
file = new File
{
Name = name,
Id = id,
Description = description,
SupportedPermissions = supportedPermissions.basic
};
return file.Id;
}
我如何為枚舉創建參數以及如何在我的偽代碼SupportedPermissions = supportedPermissions.basic
分配它,以便我的File實例設置了SupportedPermissions?
更改CreateFile
方法的簽名以期望SupportedPermissions
值而不是plain Enum。
public string CreateFile(string id, string name, string description, SupportedPermissions supportedPermissions)
{
file = new File
{
Name = name,
Id = id,
Description = description,
SupportedPermissions = supportedPermissions
};
return file.Id;
}
然后,當您調用方法時,將SupportedPermissions
值傳遞給方法
var basicFile = CreateFile(myId, myName, myDescription, SupportedPermissions.basic);
如果要傳入要使用的值,則必須使用聲明的枚舉類型並直接使用提供的值:
public string CreateFile(string id, string name, string description,
/* --> */ SupportedPermissions supportedPermissions)
{
file = new File
{
Name = name,
Id = id,
Description = description,
SupportedPermissions = supportedPermissions // <---
};
return file.Id;
}
如果您想要使用固定值,則根本不需要任何參數。 相反,直接使用枚舉值。 語法類似於類的靜態成員:
public string CreateFile(string id, string name, string description) // <---
{
file = new File
{
Name = name,
Id = id,
Description = description,
SupportedPermissions = SupportedPermissions.basic // <---
};
return file.Id;
}
首先將方法參數Enum supportedPermissions
更改為SupportedPermissions supportedPermissions
。
然后像這樣創建你的文件
file = new File
{
Name = name,
Id = id,
Description = description,
SupportedPermissions = supportedPermissions
};
對你的方法的調用應該是
CreateFile(id, name, description, SupportedPermissions.basic);
public string CreateFile(string id, string name, string description, SupportedPermissions supportedPermissions)
{
file = new File
{
Name = name,
Id = id,
Description = description,
SupportedPermissions = supportedPermissions
};
return file.Id;
}
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