泛型相关
C#
public class MyList <T> : IEnumerable <T>
{
// Implement GetEnumerator to return IEnumerator <T> to enable
// foreach iteration of our list. Note that in C# 2.0
// you are not required to implement Current and MoveNext.
// The compiler will create a class that implements IEnumerator <T> .
public IEnumerator <T> GetEnumerator()
{
//DoSomething1;
}
// We must implement this method because
// IEnumerable <T> inherits IEnumerable
System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
{
//DoSomething2;
}
}
VB
Public Class MyList
Implements IEnumerable(Of String)
' Implement GetEnumerator to return IEnumerator <T> to enable
' foreach iteration of our list. Note that in C# 2.0
' you are not required to implement Current and MoveNext.
' The compiler will create a class that implements IEnumerator <T> .
Public Function GetEnumerator() As IEnumerator(Of String) Implements IEnumerable(Of String).GetEnumerator
'DoSomething1
End Function
' We must implement this method because
' IEnumerable <T> inherits IEnumerable
Function GetEnumerator() As IEnumerator Implements IEnumerable.GetEnumerator
'DoSomething2
End Function
End Class
C#的代码可以正常编译通过，VB的就不行。
VB的错误：只有返回值类型不同，不能overload。
请帮忙看看是哪里错了。
[解决办法]
overload的重要特点是函数名相同,参数不同(顺序不同),但不能依靠返回值类型不同来重载函数
[解决办法]
泛型 是单个函数 参数的多个不同类型的问题
函数重载 是解决 函数名 相同 但是对于不同的操作 有不同个数的参数
[解决办法]
一样的
C# 的隐式实现接口，在vb中就用private
[解决办法]
我以前写过一个(现在看着有点不舒服,但也不想改了):
Public Class SinceLinkItemCollection(Of T_ID_DataType, T As SinceLinkItemBase(Of T_ID_DataType))
Inherits System.Collections.ObjectModel.Collection(Of T)
<NonSerialized()> _
Private gNode As Node(Of T)
Private gCodeFormat As String
Private gFileName As String = LzmTW.Global.EntryAssemblyInfo.GetApplicationDataCompanyTitleVersionPath & "{0}.{1}s.dat " ' AppDomain.CurrentDomain.BaseDirectory & "{0}.{1}s.dat "
Public ReadOnly Property FileName() As String
Get
Return gFileName
End Get
End Property
Sub New()
gFileName = String.Format(gFileName, System.Reflection.Assembly.GetEntryAssembly.ManifestModule.Name, GetType(T).Name)
End Sub
' ' ' <param name= "codeFormat "> 形如“00,000,0000” </param>
Sub New(ByVal codeFormat As String)
gCodeFormat = codeFormat
gFileName = String.Format(gFileName, System.Reflection.Assembly.GetEntryAssembly.ManifestModule.Name, GetType(T).Name)
End Sub
Public ReadOnly Property Node() As Node(Of T)
Get
If gNode Is Nothing Then
Me.RefleshNode()
End If
Return gNode
End Get
End Property
Public Shadows Function Add(ByVal code As String, ByVal name As String) As T
Dim mItem As T = CType(System.Activator.CreateInstance(GetType(T), New Object() {code, name}), T)
Me.Add(mItem)
Return mItem
End Function
Public Shadows Sub Add(ByVal items As T())
For Each item As T In items
Add(item)
Next
End Sub
Public Shadows Function Add(ByVal item As T) As T
item.UpdateInformations(gCodeFormat)
MyBase.Add(item)
Return item
End Function
[解决办法]
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