Question

我通过接口

从其他引用项目调用UI组件

UI-成分：

Public Class PleaseWaitWindow
    Implements PleaseWaitInterface

    Sub New(initStateText As String)

        ' This call is required by the designer.
        InitializeComponent()

        ' Add any initialization after the InitializeComponent() call.
        tbStateDescription.Text = initStateText
        Me.Activate()
    End Sub

    Public Property currentStepText As String Implements PleaseWaitInterface.currentStepText

        Get
            Return tbStateDescription.Text
        End Get
        Set(value As String)
            tbStateDescription.Text = value
            tbStateDescription.InvalidateVisual()
        End Set
    End Property

    Public Sub Display() Implements PleaseWaitInterface.Display
        Me.Show()
        Me.Activate()
    End Sub

    Public Sub Dispose() Implements PleaseWaitInterface.Dispose
        Me.Close()
    End Sub

    Public Property maxSteps As Integer Implements PleaseWaitInterface.maxSteps
        Get
            Return pbCurrentProgress.Maximum
        End Get
        Set(value As Integer)
            pbCurrentProgress.Maximum = value
        End Set
    End Property

    Public Sub PerformStep() Implements PleaseWaitInterface.PerformStep
        pbCurrentProgress.Value += 1
        pbCurrentProgress.InvalidateVisual()
    End Sub
End Class

只要我在同一个项目中进行这些调用，一切正常

喜欢这里：

  Private Function startGeneration_normal() As Boolean
            //Do some stuff
                    pw.PerformStep()
                    pw.currentStepText = ("Loading data, no stepping is available.")
            tar.startworking(pw)
            //Do some stuff
  End Function

但是当我将Interfaceobject传递给引用的项目并试图像这样使用它时：

 Public Function startworking(pw As PleaseWaitInterface) As Boolean
    tempExportFileName = "Export" & DateTime.Now.ToString("yyyy-MM-dd_HH.mm")
    //Do some stuff
    pw.currentStepText = ("Current Task: formating XML")
    //Do some more stuff
 End Function

对象中的值发生更改（在调试器中检查），但直到start_generate函数从startworking函数返回后才会刷新视觉效果。当它从引用项目中的函数返回时，将根据当前状态刷新值。

为什么在程序执行引用项目中的内容时UI不会刷新？

Answer 1

Clemens的解决方案，使用后台工作人员做了伎俩，所以
问题：
解决

刷新不起作用

1 个答案: