本文整理匯總了VB.NET中System.Linq.ILookup<TKey,TElement>接口的典型用法代碼示例。如果您正苦於以下問題：VB.NET ILookup<TKey,TElement>接口的具體用法？VB.NET ILookup<TKey,TElement>怎麽用？VB.NET ILookup<TKey,TElement>使用的例子？那麽, 這裏精選的接口代碼示例或許可以為您提供幫助。
在下文中一共展示了ILookup<TKey,TElement>接口的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的VB.NET代碼示例。
示例1: ILookupExample
Structure Package
Public Company As String
Public Weight As Double
Public TrackingNumber As Long
End Structure
Sub ILookupExample()
' Create a list of Packages to put into an ILookup data structure.
Dim packages As New System.Collections.Generic.List(Of Package)(New Package() _
{New Package With {.Company = "Coho Vineyard", .Weight = 25.2, .TrackingNumber = 89453312L}, _
New Package With {.Company = "Lucerne Publishing", .Weight = 18.7, .TrackingNumber = 89112755L}, _
New Package With {.Company = "Wingtip Toys", .Weight = 6.0, .TrackingNumber = 299456122L}, _
New Package With {.Company = "Contoso Pharmaceuticals", .Weight = 9.3, .TrackingNumber = 670053128L}, _
New Package With {.Company = "Wide World Importers", .Weight = 33.8, .TrackingNumber = 4665518773L}})
' Create a ILookup to organize the packages. Use the first character of Company as the key value.
' Select Company appended to TrackingNumber for each element value.
Dim packageLookup As ILookup(Of Char, String) = _
packages.ToLookup(Function(p) Convert.ToChar(p.Company.Substring(0, 1)), _
Function(p) p.Company & " " & p.TrackingNumber)
Dim output As New System.Text.StringBuilder
' Iterate through each group in the Lookup and output the contents.
For Each packageGroup In packageLookup
' Print the key value.
output.AppendLine(packageGroup.Key)
' Iterate through each value in the group and output it.
For Each str As String In packageGroup
output.AppendLine(String.Format(" {0}", str))
Next
Next
' Display the output.
MsgBox(output.ToString())
' This code produces the following output:
'
' C
' Coho Vineyard 89453312
' Contoso Pharmaceuticals 670053128
' L
' Lucerne Publishing 89112755
' W
' Wingtip Toys 299456122
' Wide World Importers 4665518773
End Sub