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HOW TO:程序集内读取内嵌默认资源

王朝other·作者佚名  2006-05-21
窄屏简体版  字體: |||超大  

Author:水如烟

当用Reflector查看程序集资源时,我们通常都会看到三个类SR,SRCategoryAttribute和SRDescriptionAttribute,来读取当前程序集的资源信息。

在这里,所谓的默认我指的是在Framework2.0里。默认的资源名称一般是[RootNameSpace].Resources.resources。

三个类的代码在各程序集中基本是一样的,但因为各自的资源有异,它的Resourcemanager定义为Private,而其它的变量和方法,基本上是Shared。再一点,它只服务于本程序集,所以多用Friend限制作用范围。代码有些技巧,稍增改,如下:

SR.VB

Imports System.Resources, System.Globalization

Friend NotInheritable Class SR

'如是特殊名称,在这修改。默认的为[RootNameSpace].Resources.resources

Friend Sub New()

Dim localAssembly As Reflection.Assembly = Reflection.Assembly.GetExecutingAssembly

Dim baseName As String = Nothing

For Each resourceName As String In localAssembly.GetManifestResourceNames

If System.Text.RegularExpressions.Regex.IsMatch(resourceName, ".Resources.resources$") Then

baseName = resourceName

Exit For

End If

Next

Me.m_resources = New ResourceManager(baseName, localAssembly)

End Sub

Private Shared Function GetLoader() As SR

If SR.loader Is Nothing Then

SyncLock SR.InternalSyncObject

If SR.loader Is Nothing Then

SR.loader = New SR

End If

End SyncLock

End If

Return loader

End Function

Public Shared Function GetObject(ByVal name As String) As Object

SR.GetLoader()

If SR.loader Is Nothing Then

Return Nothing

End If

Return SR.Resources.GetObject(name, SR.Culture)

End Function

Public Shared Function GetString(ByVal name As String) As String

SR.GetLoader()

If SR.loader Is Nothing Then

Return Nothing

End If

Return SR.Resources.GetString(name, SR.Culture)

End Function

Public Shared Function GetString(ByVal name As String, ByVal ParamArray args As Object()) As String

SR.GetLoader()

If SR.loader Is Nothing Then

Return Nothing

End If

Dim Result As String

Result = SR.Resources.GetString(name, SR.Culture)

If ((args Is Nothing) OrElse (args.Length <= 0)) Then

Return Result

End If

Dim argsCount As Integer = 0

Do While argsCount < args.Length

Dim argString As String = TryCast(args(argsCount), String)

If (Not argString Is Nothing) AndAlso (argString.Length > 1024) Then

args(argsCount) = (argString.Substring(0, 1021) & "

")

End If

argsCount += 1

Loop

Return String.Format(CultureInfo.CurrentCulture, Result, args)

End Function

Private Shared ReadOnly Property Culture() As CultureInfo

Get

Return Nothing '取本地CultureInfo

End Get

End Property

Private Shared ReadOnly Property InternalSyncObject() As Object

Get

If (SR.s_InternalSyncObject Is Nothing) Then

Dim tmpObj As New Object

System.Threading.Interlocked.CompareExchange(SR.s_InternalSyncObject, tmpObj, Nothing)

End If

Return SR.s_InternalSyncObject

End Get

End Property

Public Shared ReadOnly Property Resources() As ResourceManager

Get

Return SR.loader.m_resources

End Get

End Property

Private Shared loader As SR

Private Shared s_InternalSyncObject As Object

Private m_resources As ResourceManager

'Friend Const Text1 As String = "Text1"

End Class

SRCategoryAttribute.VB

Imports System.ComponentModel

<AttributeUsage(AttributeTargets.All)> _

Friend NotInheritable Class SRCategoryAttribute

Inherits CategoryAttribute

Public Sub New(ByVal category As String)

MyBase.New(category)

End Sub

Protected Overrides Function GetLocalizedString(ByVal value As String) As String

Return SR.GetString(value)

End Function

End Class

SRDescriptionAttribute.VB

Imports System.ComponentModel

<AttributeUsage(AttributeTargets.All)> _

Friend NotInheritable Class SRDescriptionAttribute

Inherits DescriptionAttribute

Private replaced As Boolean

Public Sub New(ByVal description As String)

MyBase.New(description)

End Sub

Public Overrides ReadOnly Property Description() As String

Get

If Not Me.replaced Then

Me.replaced = True

MyBase.DescriptionValue = SR.GetString(MyBase.Description)

End If

Return MyBase.Description

End Get

End Property

End Class

 
 
 
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