嗨我从exe文件加载程序时收到错误,但是当我从visual studio启动时没有收到错误。
我收到的错误是
>System.NullReferenceException: Object reference not set to an instance of an object.
在C:\ Users \ AJ \ Documents \ Movable_Re217400212010 \ MoveResizeControl \ controlHandler.vb中的MoveResizeControl.controlHandler.mControl_Resize(Object sender,EventArgs e):第211行
在System.Windows.Forms.Control.OnSizeChanged(EventArgs e) 在System.Windows.Forms.Control.UpdateBounds(Int32 x,Int32 y,Int32 width,Int32 height,Int32 clientWidth,Int32 clientHeight)
System.Windows.Forms.Control.UpdateBounds()上的在System.Windows.Forms.Control.WmWindowPosChanged(消息& m) 在System.Windows.Forms.Control.WndProc(消息& m) 在System.Windows.Forms.GroupBox.WndProc(消息& m) 在System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd,Int32 msg,IntPtr wparam,IntPtr lparam
我知道我的问题在于这段代码
Private Sub Timer7_Tick(sender As Object, e As EventArgs) Handles Timer7.Tick
Timer2.Start()
Timer5.Start()
Dim i As Integer
i = 0
Dim bl1 As Integer
Dim br1 As Integer
Dim tl1 As Integer
Dim tr1 As Integer
Dim bl14 As Integer
Dim br14 As Integer
Dim tl14 As Integer
Dim tr14 As Integer
bl1 = bl.Text
br1 = br.Text
tl1 = tl.Text
tr1 = tr.Text
bl14 = bl4.Text
br14 = br4.Text
tl14 = tl4.Text
tr14 = tr4.Text
Me.PictureBox1.Height = (i + bl1) - (i + tl1)
Me.PictureBox1.Width = (i + br1) - (i + tr1)
Me.GroupBox1.Height = (i + bl14) - (i + tl14)
Me.GroupBox1.Width = (i + br14) - (i + tr14)
Me.PictureBox1.Location = New Point(Me.PictureBox1.Location.X + (0 + tr.Text), Me.PictureBox1.Location.Y + (0 + tl.Text))
Me.GroupBox1.Location = New Point(Me.GroupBox1.Location.X + (0 + tr4.Text), Me.GroupBox1.Location.Y + (0 + tl4.Text))
Timer7.Stop()
End Sub
我需要在开始之前检查null并遇到问题。
答案 0 :(得分:0)
在初始化完成之前执行计时器滴答事件是可能的。尝试禁用计时器,然后以#34;显示"的形式启用它们。事件