C# 理解枚举
我试图弄清楚枚举是如何工作的,我试图创建一个函数来写入注册表,使用枚举作为注册表的根,但有点困惑C# 理解枚举,c#,enums,C#,Enums,我试图弄清楚枚举是如何工作的,我试图创建一个函数来写入注册表,使用枚举作为注册表的根,但有点困惑 public enum RegistryLocation { ClassesRoot = Registry.ClassesRoot, CurrentUser = Registry.CurrentUser, LocalMachine = Registry.LocalMachine, User
public enum RegistryLocation
{
ClassesRoot = Registry.ClassesRoot,
CurrentUser = Registry.CurrentUser,
LocalMachine = Registry.LocalMachine,
Users = Registry.Users,
CurrentConfig = Registry.CurrentConfig
}
public void RegistryWrite(RegistryLocation location, string path, string keyname, string value)
{
// Here I want to do something like this, so it uses the value from the enum
RegistryKey key;
key = location.CreateSubKey(path);
// so that it basically sets Registry.CurrentConfig for example, or am i doing it wrong
..
}
问题是,您正在尝试使用类初始化枚举值,并将枚举值用作类,但这是无法做到的。发件人: 批准的枚举类型有byte、sbyte、short、ushort、int、, uint、long或ulong 您可以做的是将该枚举作为标准枚举,然后让一个方法基于该枚举返回正确的RegistryKey 例如:
public enum RegistryLocation
{
ClassesRoot,
CurrentUser,
LocalMachine,
Users,
CurrentConfig
}
public RegistryKey GetRegistryLocation(RegistryLocation location)
{
switch (location)
{
case RegistryLocation.ClassesRoot:
return Registry.ClassesRoot;
case RegistryLocation.CurrentUser:
return Registry.CurrentUser;
case RegistryLocation.LocalMachine:
return Registry.LocalMachine;
case RegistryLocation.Users:
return Registry.Users;
case RegistryLocation.CurrentConfig:
return Registry.CurrentConfig;
default:
return null;
}
}
public void RegistryWrite(RegistryLocation location, string path, string keyname, string value) {
RegistryKey key;
key = GetRegistryLocation(location).CreateSubKey(path);
}
问题是,您正在尝试使用类初始化枚举值,并将枚举值用作类,但这是无法做到的。发件人: 批准的枚举类型有byte、sbyte、short、ushort、int、, uint、long或ulong 您可以做的是将该枚举作为标准枚举,然后让一个方法基于该枚举返回正确的RegistryKey 例如:
public enum RegistryLocation
{
ClassesRoot,
CurrentUser,
LocalMachine,
Users,
CurrentConfig
}
public RegistryKey GetRegistryLocation(RegistryLocation location)
{
switch (location)
{
case RegistryLocation.ClassesRoot:
return Registry.ClassesRoot;
case RegistryLocation.CurrentUser:
return Registry.CurrentUser;
case RegistryLocation.LocalMachine:
return Registry.LocalMachine;
case RegistryLocation.Users:
return Registry.Users;
case RegistryLocation.CurrentConfig:
return Registry.CurrentConfig;
default:
return null;
}
}
public void RegistryWrite(RegistryLocation location, string path, string keyname, string value) {
RegistryKey key;
key = GetRegistryLocation(location).CreateSubKey(path);
}
嗯,我想我明白了,但是=在枚举中究竟可以用来做什么呢?然后你可以用它为枚举分配非连续的数值。例如,如果希望枚举从-1开始,然后从-1开始,那么可以将第一个条目设置为-1。例如:InvalidSelection=-1,NoSelection(值为0),ValidSelection(值为1)。嗯,我想我明白了,但是=在枚举中究竟可以用于什么,然后您可以使用它为枚举分配非顺序的数值。例如,如果希望枚举从-1开始,然后从-1开始,那么可以将第一个条目设置为-1。例如:InvalidSelection=-1、NoSelection(值为0)、ValidSelection(值为1)。