重载具有不同返回类型但具有相同参数列表的方法 [英] Overloading a method with different return types but the same parameter lists
问题描述
您好。
我正在尝试重载方法,以便我有四个可能的工作
副本。这四种方法之间的唯一区别是通过
搜索什么以及以什么方式返回结果。所以我有以下内容。
public static ArrayList GetRoles(int userID)
public static ArrayList GetRoles(string username)
public static string GetRoles(int userID)//错误1
公共静态字符串GetRoles(字符串用户名)//错误2
但我收到以下内容错误。
错误1.
C:\Projects\acmsproject\trunk \acms \ source \ DataAcce ss \DatabaseAccess。 cs(117):
Class''acms.DataAccess.DatabaseAccess''已经定义了一个名为
''GetRoles''的成员,其参数类型相同
错误2.
C:\Projects\acmsproject\trunk\acms\source \ DataAcce ss \DatabaseAccess.cs(120):
类''acms.DataAccess.DatabaseAccess''已经定义了一个名为
''GetRoles''的成员,其参数类型相同
如何重载这些方法提供我想要的功能。
提前谢谢。
Ryan Taylor
Hello Ryan,
如何重载这些方法以提供我想要的功能。在此先感谢。
你不能。
也许它在C#2中得到支持!?
-
问候
Jochen
Jochen Kalmbach< no ****** **************@holzma.de>写道:如何重载这些方法以提供我想要的功能。提前谢谢。
你不能。
也许它在C#2中得到支持!?
不,这不是,谢天谢地。我一个人不想要哪种方法
被称为由我对返回值做的决定。
-
Jon Skeet - < sk *** @ pobox.com>
http://www.pobox.com/~skeet
如果回复小组,请不要给我发邮件
< blockquote>抱歉这是不可能的。
建议重命名方法GetRoleList或其他东西。
这是C#的限制,因为它受支持中级语言。
-
问候,
DennisJDMyrén
奥斯陆Kodebureau
" Ryan Taylor" < RT ***** @ stgeorgeconsulting.com>在消息中写道
新闻:Oj ************** @ TK2MSFTNGP12.phx.gbl ...
你好。
我正在尝试重载方法,以便我有四个可能的工作副本。这四种方法之间的唯一区别是通过
搜索以及以何种方式返回结果。所以我有以下几点。
public static ArrayList GetRoles(int userID)
public static ArrayList GetRoles(string username)
公共静态字符串GetRoles(int userID)//错误1
public static string GetRoles(string username)//错误2
但我收到以下错误。
错误1.
C:\Projects\acmsproject\trunk \acms \source \DataAcce ss \DatabaseAccess.cs(117):Class''acms.DataAccess.DatabaseAccess''已经定义了一个名为
的成员''GetRoles''具有相同的参数类型
错误2.
C:\Projects \acmsproject\trunk\acms\source \ DataAcce ss \DatabaseAccess.cs(120):类''acms.DataAccess.DatabaseAccess''已经定义了一个名为
''GetRoles''的成员,具有相同的参数类型
我怎样才能超载这些方法提供了我想要的功能。
提前致谢。
<瑞安泰勒
Hello.
I am trying to overload a method so that I have four possible working
copies. The only difference between the four methods is what to search by
and in what manner to return the results. So I have the following.
public static ArrayList GetRoles(int userID)
public static ArrayList GetRoles(string username)
public static string GetRoles(int userID) // Error 1
public static string GetRoles(string username) // Error 2
But I am receiving the following errors.
Error 1.
C:\Projects\acmsproject\trunk\acms\source\DataAcce ss\DatabaseAccess.cs(117):
Class ''acms.DataAccess.DatabaseAccess'' already defines a member called
''GetRoles'' with the same parameter types
Error 2.
C:\Projects\acmsproject\trunk\acms\source\DataAcce ss\DatabaseAccess.cs(120):
Class ''acms.DataAccess.DatabaseAccess'' already defines a member called
''GetRoles'' with the same parameter types
How can I overload these methods to provide the functionality that I want.
Thanks in advance.
Ryan Taylor
Hello Ryan,
How can I overload these methods to provide the functionality that I
want. Thanks in advance.
You can′t.
Maybe it is supported in C# 2 !?
--
Greetings
Jochen
Jochen Kalmbach <no********************@holzma.de> wrote:How can I overload these methods to provide the functionality that I
want. Thanks in advance.
You can′t.
Maybe it is supported in C# 2 !?
No, it''s not, thank goodness. I for one don''t want which method is
called to be determined by what I do with the returned value.
--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
Sorry that is impossible.
An advice would be to rename the methods GetRoleList or something.
This is a limitation of C#, as it is supported in the Intermediate Language.
--
Regards,
Dennis JD Myrén
Oslo Kodebureau
"Ryan Taylor" <rt*****@stgeorgeconsulting.com> wrote in message
news:Oj**************@TK2MSFTNGP12.phx.gbl...Hello.
I am trying to overload a method so that I have four possible working
copies. The only difference between the four methods is what to search by
and in what manner to return the results. So I have the following.
public static ArrayList GetRoles(int userID)
public static ArrayList GetRoles(string username)
public static string GetRoles(int userID) // Error 1
public static string GetRoles(string username) // Error 2
But I am receiving the following errors.
Error 1.
C:\Projects\acmsproject\trunk\acms\source\DataAcce ss\DatabaseAccess.cs(117): Class ''acms.DataAccess.DatabaseAccess'' already defines a member called
''GetRoles'' with the same parameter types
Error 2.
C:\Projects\acmsproject\trunk\acms\source\DataAcce ss\DatabaseAccess.cs(120): Class ''acms.DataAccess.DatabaseAccess'' already defines a member called
''GetRoles'' with the same parameter types
How can I overload these methods to provide the functionality that I want.
Thanks in advance.
Ryan Taylor
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