vb.net – printDialog之后的Cursor.Wait

概述我有一点问题.我将光标设置为等待状态.调用PrintDialog后,光标返回默认状态.我无法再次将光标设置为等待状态.代码是这样的： Cursor.Current = Cursors.WaitCursor[...]Dim result As DialogResult = printDialog.ShowDialog()If result = DialogResult.Cancel Then 我有一点问题.我将光标设置为等待状态.调用PrintDialog后,光标返回默认状态.我无法再次将光标设置为等待状态.代码是这样的：

Cursor.Current = Cursors.WaitCursor[...]Dim result As DialogResult = printDialog.ShowDialog()If result = DialogResult.Cancel Then    ReturnEnd IfCursor.Current = Cursors.WaitCursor[...]

解决方法 我刚用你的代码做了一个小测试.使用你的代码时,我的VS2012没有显示Cursor.Current,但在使用它时没有抛出任何异常.所以我改成了

Me.Cursor = Cursors.WaitCursorDim result As DialogResult = printDialog.ShowDialog()If result = DialogResult.Cancel Then    ReturnEnd If' not necesary any more'Cursor.Current = Cursors.WaitCursor

并且在显示printDialog之后WaitCursor停留了.

编辑：找到一个很好的解释Cursor.Current and Cursor之间的差异！

EDIT2：我改变了我的代码,以利用上面提到的@HansPassant的例子中的HourGlass类.即使您输入textBox,WaitCursor也会保留.无论如何 – 当我悬停在例如边界上时,我仍然能够失去waitCursor.一个textBox.

总而言之IMO我认为当仍然可以输入文本aso时强制使用waitCursor并不是很好.也许您可以考虑在某种 *** 作完成之前禁用控件,然后再将光标更改回来.

Private Sub button1_Click(sender As Object,e As EventArgs) Handles button1.Click    Hourglass.Enabled = True    Dim result As DialogResult = PrintDialog1.ShowDialog()    If result = windows.Forms.DialogResult.Cancel Then        Return    End If    'Cursor.Current = Cursors.WaitCursorEnd Sub

Hourglass.vb – 我希望在将其转换为vb.net时没有犯任何错误

Public Class Hourglass  Implements Idisposable  Public Shared Property Enabled As Boolean    Get        Return Application.UseWaitCursor    End Get    Set(ByVal value As Boolean)        If value = Application.UseWaitCursor Then Return        Application.UseWaitCursor = value        Dim f As Form = Form.ActiveForm        If Not f Is nothing AndAlso f.Handle <> IntPtr.Zero Then            SendMessage(f.Handle,32,f.Handle,1)        End If    End Set  End Property  <System.Runtime.InteropServices.Dllimport("user32.dll")>  Private Shared Function SendMessage(hWnd As IntPtr,msg As IntPtr,wp As IntPtr,lp As IntPtr) As IntPtr  End Function  Public Sub dispose() Implements Idisposable.dispose    Enabled = False  End SubEnd Class

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