运营商'<>'没有为类型'system.windows.forms.control'和'system.windows.forms.control定义 [英] Operator '<>' is not defined for types 'system.windows.forms.control' and 'system.windows.forms.control

问题描述

 Private Sub ComboBox2_KeyDown（ByVal sender As System.Object，ByVal e As System.Windows.Forms.KeyEventArgs）处理TextBox8.KeyDown，TextBox6.KeyDown，TextBox5.KeyDown，TextBox3.KeyDown，TextBox2。 KeyDown，DateTimePicker2.KeyDown，DateTimePicker1.KeyDown，ComboBox2.KeyDown 
 If（e.KeyCode = Keys.Enter）然后
 
结束如果
 If（Me.GetNextControl（ActiveControl，真）<> Nothing）然后
 
 e.Handled = True 
 Me.GetNextControl（ActiveControl，True）.Focus（）
结束如果
 

我的尝试：

没有为类型'System.Windows.Forms.Control'和'System.Windows.Forms.Control 

定义运算符'<>'解决方案

尝试使用这个

 如果 不 我 .GetNextControl（ ActiveControl， True ）  没什么 然后 

Private Sub ComboBox2_KeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox8.KeyDown, TextBox6.KeyDown, TextBox5.KeyDown, TextBox3.KeyDown, TextBox2.KeyDown, DateTimePicker2.KeyDown, DateTimePicker1.KeyDown, ComboBox2.KeyDown
       If (e.KeyCode = Keys.Enter) Then

       End If
       If (Me.GetNextControl(ActiveControl, True) <> Nothing) Then

           e.Handled = True
           Me.GetNextControl(ActiveControl, True).Focus()
       End If

What I have tried:

Operator '<>' is not defined for types 'System.Windows.Forms.Control' and 'System.Windows.Forms.Control

解决方案

Try using this

If Not Me.GetNextControl(ActiveControl, True) Is Nothing Then

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