IResourceProvider 介面
重要
部分資訊涉及發行前產品,在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊,不做任何明確或隱含的瑕疵擔保。
定義類別必須實作的介面,以用來做為資源提供者。
public interface class IResourceProvider
public interface IResourceProvider
type IResourceProvider = interface
Public Interface IResourceProvider
下列程式碼範例顯示擷取快取值的自訂資源提供者處理站。 資源提供者處理站會建立實作 的類別 IResourceProvider 實例。
[
DesignTimeResourceProviderFactoryAttribute(
typeof(CustomDesignTimeResourceProviderFactory))
]
public class CustomResourceProviderFactory : ResourceProviderFactory
{
public override IResourceProvider
CreateGlobalResourceProvider(string classname)
{
return new CustomResourceProvider(null, classname);
}
public override IResourceProvider
CreateLocalResourceProvider(string virtualPath)
{
return new CustomResourceProvider(virtualPath, null);
}
}
// Define the resource provider for global and local resources.
internal class CustomResourceProvider : IResourceProvider
{
string _virtualPath;
string _className;
public CustomResourceProvider(string virtualPath, string classname)
{
_virtualPath = virtualPath;
_className = classname;
}
private IDictionary GetResourceCache(string culturename)
{
return (IDictionary)
System.Web.HttpContext.Current.Cache[culturename];
}
object IResourceProvider.GetObject
(string resourceKey, CultureInfo culture)
{
object value;
string cultureName = null;
if (culture != null)
{
cultureName = culture.Name;
}
else
{
cultureName = CultureInfo.CurrentUICulture.Name;
}
value = GetResourceCache(cultureName)[resourceKey];
value ??= GetResourceCache(null)[resourceKey];
return value;
}
IResourceReader IResourceProvider.ResourceReader
{
get
{
string cultureName = null;
CultureInfo currentUICulture = CultureInfo.CurrentUICulture;
if (!String.Equals(currentUICulture.Name,
CultureInfo.InstalledUICulture.Name))
{
cultureName = currentUICulture.Name;
}
return new CustomResourceReader
(GetResourceCache(cultureName));
}
}
}
internal sealed class CustomResourceReader : IResourceReader
{
private IDictionary _resources;
public CustomResourceReader(IDictionary resources)
{
_resources = resources;
}
IDictionaryEnumerator IResourceReader.GetEnumerator()
{
return _resources.GetEnumerator();
}
void IResourceReader.Close() { }
IEnumerator IEnumerable.GetEnumerator()
{
return _resources.GetEnumerator();
}
void IDisposable.Dispose() { return; }
}
<DesignTimeResourceProviderFactoryAttribute(GetType(CustomDesignTimeResourceProviderFactory))> _
Public Class CustomResourceProviderFactory
Inherits ResourceProviderFactory
Public Overrides Function CreateGlobalResourceProvider(ByVal classname As String) As IResourceProvider
Return New CustomResourceProvider(Nothing, classname)
End Function
Public Overrides Function CreateLocalResourceProvider(ByVal virtualPath As String) As IResourceProvider
Return New CustomResourceProvider(virtualPath, Nothing)
End Function
End Class
' Define the resource provider for global and local resources.
Friend Class CustomResourceProvider
Implements IResourceProvider
Dim _virtualPath As String
Dim _className As String
Public Sub New(ByVal virtualPath As String, ByVal classname As String)
_virtualPath = virtualPath
_className = classname
End Sub
Private Function GetResourceCache(ByVal culturename As String) As IDictionary
Return System.Web.HttpContext.Current.Cache(culturename)
End Function
Function GetObject(ByVal resourceKey As String, ByVal culture As CultureInfo) As Object Implements IResourceProvider.GetObject
Dim value As Object
Dim cultureName As String
cultureName = Nothing
If (IsNothing(culture)) Then
cultureName = CultureInfo.CurrentUICulture.Name
Else
cultureName = culture.Name
End If
value = GetResourceCache(cultureName)(resourceKey)
If (value = Nothing) Then
value = GetResourceCache(Nothing)(resourceKey)
End If
Return value
End Function
ReadOnly Property ResourceReader() As IResourceReader Implements IResourceProvider.ResourceReader
Get
Dim cultureName As String
Dim currentUICulture As CultureInfo
cultureName = Nothing
currentUICulture = CultureInfo.CurrentUICulture
If (Not (String.Equals(currentUICulture.Name, CultureInfo.InstalledUICulture.Name))) Then
cultureName = currentUICulture.Name
End If
Return New CustomResourceReader(GetResourceCache(cultureName))
End Get
End Property
End Class
Friend NotInheritable Class CustomResourceReader
Implements IResourceReader
Private _resources As IDictionary
Public Sub New(ByVal resources As IDictionary)
_resources = resources
End Sub
Function GetEnumerator1() As IDictionaryEnumerator Implements IResourceReader.GetEnumerator
Return _resources.GetEnumerator()
End Function
Sub Close() Implements IResourceReader.Close
End Sub
Function GetEnumerator() As IEnumerator Implements IEnumerable.GetEnumerator
Return _resources.GetEnumerator()
End Function
Sub Dispose() Implements IDisposable.Dispose
End Sub
End Class
資源提供者有助於從資源檔擷取值。 在頁面剖析期間遇到表單 <%$ Resources: classKey, resourceKey %>
的運算式時,資源提供者會傳回資源的當地語系化值。 類別 ResourceProviderFactory 會建立 物件的實例 IResourceProvider ,以用於擷取值。
Resource |
取得從來源讀取資源值的物件。 |
Get |
傳回索引鍵和文化特性的資源物件。 |
產品 | 版本 |
---|---|
.NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |