小编Ros*_*ose的帖子

Visual Basic 2010,.NET 3.5有没有办法实际确定DataGridView的水平滚动条是活动还是可见？当DGV的水平滚动条出现时,我需要移动一些项目.

VB.NET 2012我创建了一个foo的部分列表,它在构建之后将保持静态,然后是第二个Foo列表,它将始终包含部分列表中的所有内容.我的问题是......将一个列表复制到另一个列表的快速或最快方法是什么？有没有更快的方式,没有循环？

见方法Combine在Class1

Option Explicit On
Option Strict On
Public Class Form1
    Private _initFoo As New Class1()
    Private _postFoo As New Class1()

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles Me.Load
        _initFoo.Init()
        _postFoo.Combine(_initFoo, _postFoo) ' **
    End Sub
End Class


Option Explicit On
Option Strict On
Public Class Class1
    Private FooLst As New List(Of Foo)

    Public Class Foo
        Public Property Item1 As String
        Public Property Item2 As String
    End Class

    Public Sub Init()
        FooLst.Add(New Class1.Foo With …

我将不得不离开Find(),.FirstOrDefault()等,并用循环替换它,除非有人能解释如何处理不返回值的列表？

Public Class Form1

    Public Class TestClass
        Public Property item1 As String
        Public Property item2 As String
    End Class

    Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
        Dim myLst As New List(Of TestClass)
        myLst.Add(New TestClass With {.item1 = "A", .item2 = "B"})
        myLst.Add(New TestClass With {.item1 = "C", .item2 = "D"})

        Debug.WriteLine(myLst.Find(Function(n) n.item1 = "X").item1) ' nullreferenceexception, what?

    End Sub

End Class