常数类库 - 最佳实践？

我在内部应用程序上使用.Net Reflector来尝试理解之前的Dev正在做什么以及学习.我从来没有关于如何开发应用程序的实际指导,所以我从可能的地方采取(Hooray Stack Overflow).话虽如此,我发现了让我困惑的事情.一个名为WinConstant的类库,包含以下代码.

这是我的实际问题:

这可能有什么用？

将一堆常量存储在类库中有什么价值？

这被认为是"最佳实践"吗？

思想和指导赞赏!

Public Class clsConstant
    Public Const cAccess As String = "Access"
    Public Const cAddress As String = "Address"
    Public Const cCancel As String = "Cancel"
    Public Const cCity As String = "City"
    Public Const cClear As String = "Clear"
    Public Const cClickOnMessage As String = "Click on any row in top pane to see the detail fields in the bottom pane."
    Public Const cClientID As String = "ClientID"
    Public Const cColon As String = ": "
    Public Const cComma As String = ","
    Public Const cContactID As String = "ContactID"
    Public Const cCounty As String = "County"
    Public Const cDash As String = "-"
    Public Const cDelete As String = "Delete"
    Public Const cDepartment As String = "Department"
    Public Const cError As String = "Error"
    Public Const cExec As String = "Exec"
    Public Const cFalse As String = "False"
    Public Const cFavorite As String = "Favorite"
    Public Const cFederal As String = "Federal"
    Public Const cFriday As String = "Friday"
    Public Const cfrmMain As String = "frmMain"
    Public Const cfrmModuleLogin As String = "frmModuleLogin"
    Public Const cfrmModuleSplash As String = "frmModuleSplash"
    Public Const cHelp As String = "Help"
    Public Const cHint As String = "Hint"
    Public Const cImagePath As String = "../../image"
    Public Const cIn As String = "In"
    Public Const cInformation As String = "Information"
    Public Const cInitialScreenID As String = "InitialScreenID"
    Public Const cInsert As String = "Insert"
    Public Const cJuvenileID As String = "JuvenileID"
    Public Const cLetter As String = "Letter"
    Public Const cManual As String = "Manual"
    Public Const cMasterID As String = "MasterID"
    Public Const cModuleID As String = "ModuleID"
    Public Const cModuleName As String = "ModuleName"
    Public Const cMonday As String = "Monday"
    Public Const cName As String = "Name"
    Public Const cNegative As String = "Negative"
     _
    Public Shared ReadOnly cNLowDate As DateTime = New DateTime(&H851055320574000)
     _
    Public Shared ReadOnly cNullDate As DateTime = New DateTime
    Public Const cNullDateString As String = "12:00:00 AM"
    Public Const cOfficeIDDefault As String = "01"
    Public Const cOne As Integer = 1
    Public Const cOut As String = "Out"
    Public Const cPopUp As String = "PopUp"
    Public Const cPositive As String = "Positive"
    Public Const cProcess As String = "Process"
    Public Const cProviderID As String = "ProviderID"
    Public Const cQuestion As String = "Question"
    Public Const cRead As String = "Read"
    Public Const cReferralID As String = "ReferralID"
    Public Const cReminder As String = "Reminder"
    Public Const cReport As String = "Report"
    Public Const cReportEngine As String = "ReportEngine"
    Public Const cReportEnginePath As String = "ReportEnginePath"
    Public Const cReportingServices As String = "ReportingServices"
    Public Const cReportServer As String = "ReportServer"
    Public Const cReportService As String = "ReportService"
    Public Const cReportServiceLocal As String = "ReportServiceLocal"
    Public Const cReportServiceServer As String = "ReportServiceServer"
    Public Const cSaturday As String = "Saturday"
    Public Const cSearch As String = "Search"
    Public Const cSelect As String = "Select"
    Public Const cSpace As String = " "
    Public Const cSQLLoginError As String = "SQL Server login/password invalid"
    Public Const cStart As String = "Select a module"
    Public Const cState As String = "State"
    Public Const cSubjectID As String = "SubjectID"
    Public Const cSunday As String = "Sunday"
    Public Const cThursday As String = "Thursday"
    Public Const cTooltipCancel As String = "Reset form data values back to before all manual changes."
    Public Const cTooltipClear As String = "Clears all data entry fields prior to an Insert"
    Public Const cTooltipClient As String = "Display a Client popup window."
    Public Const cTooltipClose As String = "Close this form"
    Public Const cTooltipDelete As String = "Delete the current record being displayed, no undo possible."
    Public Const cTooltipExe As String = "Initiate a batch process."
    Public Const cTooltipInsert As String = "Insert a brand new record"
    Public Const cTooltipSearch As String = "Perform a Search for values entered."
    Public Const cTooltipSelect As String = "Perform a Select for values entered."
    Public Const cTooltipUpdate As String = "Update an existing record"
    Public Const cTrue As String = "True"
    Public Const cTuesday As String = "Tuesday"
    Public Const cUnderscore As String = "____________________________________________________________"
    Public Const cUpdate As String = "Update"
    Public Const cWarning As String = "Warning"
    Public Const cWeb As String = "Web"
    Public Const cWednesday As String = "Wednesday"
    Public Const cWorkerID As String = "WorkerID"
    Public Const cZero As Integer = 0
    Public Shared strLongDate As String() = DateAndTime.Now.ToLongDateString.Split(New Char() { ","c })
    Public Shared strModuleMainStatusStripFormID As String = Nothing
End Class

Joe Soul-bri.. 8

回到用c编码windows应用程序的时代,Windows中有类似的文件#included,其中包含#defines创建常量的长列表.各种c应用程序在自己的文件中模拟了这种方法."阶级"似乎是这种"c-ism"的"音译".面向对象设计的基本原则是将代码和数据混合到相关的功能单元:对象中.正如jfullerton写道:

从编程的角度来看,面向对象涉及程序对象,封装,继承和多态.概念对象在程序代码中建模.封装保持对象的数据和方法,这些数据和方法将数据一起用作对象的一部分.

很明显,这个常数列表不符合OO实践,但是回归过去.

回答你的问题:

- 这个类包含常量,就是它

- 老开发者可能这样做是因为这是他过去常常做的事情

- 这不是目前最好的做法.

当然,如果这是您的应用程序的一部分,您不能只是扔掉它.相反,假设您使用测试驱动开发和重构的当前最佳实践,这可以随着时间的推移重构

回到用c编码windows应用程序的时代,Windows中有类似的文件#included,其中包含#defines创建常量的长列表.各种c应用程序在自己的文件中模拟了这种方法."阶级"似乎是这种"c-ism"的"音译".面向对象设计的基本原则是将代码和数据混合到相关的功能单元:对象中.正如jfullerton写道:

从编程的角度来看,面向对象涉及程序对象,封装,继承和多态.概念对象在程序代码中建模.封装保持对象的数据和方法,这些数据和方法将数据一起用作对象的一部分.

很明显,这个常数列表不符合OO实践,但是回归过去.

回答你的问题:

- 这个类包含常量,就是它

- 老开发者可能这样做是因为这是他过去常常做的事情

- 这不是目前最好的做法.

当然,如果这是您的应用程序的一部分,您不能只是扔掉它.相反,假设您使用测试驱动开发和重构的当前最佳实践,这可以随着时间的推移重构

将文字与其余代码分开是个好主意.

奇怪的是,这些应该主要是资源而不是常量字符串.然后,如果需要,可以轻松地对其进行本地化,或者在不重新编译整个应用程序的情况下替换/更新.

其中一些甚至不是资源:cUnderscore例如看起来它使用文本来创建视觉效果 - 通常是一个坏主意.

在你的前任的辩护中,我认为这个代码比寻找分散在整个源代码中的相同常量更为可取,因为它会使资源的重构变得更简单一些.