匿名类初始化在VB.Net [英] Anonymous class initialization in VB.Net

问题描述

我想创建在vb.net匿名类恰好是这样的：

i want to create an anonymous class in vb.net exactly like this:

var data = new {
                total = totalPages,
                page = page,
                records = totalRecords,
                rows = new[]{
                    new {id = 1, cell = new[] {"1", "-7", "Is this a good question?"}},
                    new {id = 2, cell = new[] {"2", "15", "Is this a blatant ripoff?"}},
                    new {id = 3, cell = new[] {"3", "23", "Why is the sky blue?"}}
                }
            };

THX。

thx.

推荐答案

VB.NET 2008不具备新[] 结构，但VB.NET 2010一样。您不能直接在VB.NET 2008年创建匿名类型的数组关键是要宣布这样的功能：

VB.NET 2008 does not have the new[] construct, but VB.NET 2010 does. You cannot create an array of anonymous types directly in VB.NET 2008. The trick is to declare a function like this:

Function GetArray(Of T)(ByVal ParamArray values() As T) As T()
    Return values
End Function

和让编译器推断为我们的类型（因为它的匿名类型，我们不能指定名称）。然后使用它像：

And have the compiler infer the type for us (since it's anonymous type, we cannot specify the name). Then use it like:

Dim jsonData = New With { _
  .total = totalPages, _
  .page = page, _
  .records = totalRecords, _
  .rows = GetArray( _
        New With {.id = 1, .cell = GetArray("1", "-7", "Is this a good question?")}, _
        New With {.id = 2, .cell = GetArray("2", "15", "Is this a blatant ripoff?")}, _
        New With {.id = 3, .cell = GetArray("3", "23", "Why is the sky blue?")}
   ) _
}

PS。这不叫JSON。这就是所谓的匿名类型。

PS. This is not called JSON. It's called an anonymous type.

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