Question

我试图像这样在表格标题中下拉 -

下拉示例

Public Class Form1

    Public ThreadList As String() = {"FSANO1P", "FJBJB1P", "COPOR1P", "FFBIVDP", "*******", "FFJACPP", "XATXTDP"}

    'note Async keyword on handler
    Private Async Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

        Button1.Enabled = False
        Dim running As New List(Of Task)

        For Each tskName As String In ThreadList
            'start new task
            Dim tsk As Task
            tsk = Task.Run(Sub()
                               For x As Integer = 1 To 10
                                   Dim ct As Integer = x
                                   'simulate code related to the file
                                   Threading.Thread.Sleep(500)

                                   'report to the UI
                                   Me.Invoke(Sub()
                                                 Label1.Text = String.Format("{0}  {1}", tskName, ct)
                                             End Sub)
                               Next
                           End Sub)

            Threading.Thread.Sleep(100) 'for testing delay between each start

            running.Add(tsk)
        Next

        'async wait for all to complete
        For Each wtsk As Task In running
            Await wtsk
        Next

        Button1.Enabled = True
    End Sub

    Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
        'test UI responsive during test
        Label1.Text = DateTime.Now.ToString
    End Sub
End Class

但是在前端屏幕中，下拉到桌面的后部。将z-index设置为9999并且相对位置不起作用。

Answer 1

如果您将Messages锚标记替换为：

<a class="dropdown-toggle" id="dropdownMenu" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true">Messages</a>

它会正常工作。咏叹调-haspopup =＆＃34;真＆＃34;将指示元素在单击时将显示菜单或弹出窗口。

小提琴：http://jsfiddle.net/dtchh/#&togetherjs=EL6OONsxV1

如何在bootstrap表中创建下拉选项

1 个答案: