我如何在 VB.net 中编写这个 lambda 选择方法？
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How do I write this lambda select method in VB.net?
提问by dotnetN00b
For I've tried this:
因为我试过这个：
Dim exampleItems As Dictionary(Of String, String) = New Dictionary(Of String, String)
Dim blah = exampleItems.Select (Function(x) New (x.Key, x.Value)).ToList 'error here
But I'm getting a syntax error and all the examples that I've seen are in C#.
但是我遇到了语法错误，而且我看到的所有示例都是用 C# 编写的。
回答by Reed Copsey
This would be:
这将是：
Dim blah = exampleItems.Select (Function(x) New With { .Key = x.Key, .Value = x.Value }).ToList
For details, see Anonymous Types. (Depending on usage, you might also want Key or Value to be flagged with the Key keyword.)
有关详细信息，请参阅匿名类型。（根据使用情况，您可能还希望使用Key 关键字标记 Key 或 Value 。）
That being said, Dictionary(Of TKey, Of TValue)already is an IEnumerable(Of KeyValuePair(Of TKey, Of TValue), so you can also just do:
话虽如此，Dictionary(Of TKey, Of TValue)已经是一个IEnumerable(Of KeyValuePair(Of TKey, Of TValue)，所以你也可以这样做：
Dim blah = exampleItems.ToList
And you'll have a list of KeyValuePair, which has a Keyand Valueproperty already. This really means there's no need to make the anonymous type.
并且您将拥有一个 KeyValuePair 列表，该列表已经具有KeyandValue属性。这真的意味着不需要创建匿名类型。
