Lambda表達式從C＃到VB.Net

Question

使用Lambda表達式的C＃這一行在VB.Net中將是什么？

string s = blockRenderer.Capture(() => RenderPartialExtensions.RenderPartial(h, userControl, viewData));

具有-功能，但我不知道具體如何...

Answer 1

應該是這樣的：

Dim s As String = blockRenderer.Capture(Function() RenderPartialExtensions.RenderPartial (h, userControl, viewData))

Answer 2

查看此在線C＃到VB.NET轉換器 。 它並不總是能使事情變得完美，但是在我使用它的所有時間里，它都做得很好。

Dim s As String = blockRenderer.Capture(Function() RenderPartialExtensions.RenderPartial(h, userControl, viewData))

Answer 3

VB.NET中的Lambda表達式需要具有返回值，解決方案是包裝方法。

Public Shared Function RenderPartialToString(ByVal userControl As String, ByVal viewData As Object, ByVal tempData As Object, ByVal controllerContext As ControllerContext) As String

        Dim h As New HtmlHelper(New ViewContext(controllerContext, New WebFormView("omg"), viewData, tempData), New ViewPage())
        Dim blockRenderer As New MvcContrib.UI.BlockRenderer(controllerContext.HttpContext)
        Dim s = blockRenderer.Capture(New Action(Function() renderPartialLambda(h, userControl, viewData)))

        Return s

End Function





Private Shared Function renderPartialLambda(ByVal html As HtmlHelper, ByVal userControl As String, ByVal viewData As Object)
                RenderPartialExtensions.RenderPartial(html, userControl, viewData)
                Return Nothing
End Function

Answer 4

Dim s As String = _
    blockRenderer.Capture( _
        Function() RenderPartialExtensions.RenderPartial(h, userControl, viewData) _
     )