vb.net Windows调用表单问题 [英] vb.net windows calling a form problem

问题描述

我正在从MDI表单调用一个表单，但是它显示对象引用未设置为对象实例".我的代码如下:

I''m calling from MDI form to a form but it is showing "object reference not set to an instance of object". My code is given below:

Private Sub btnNewAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnNewAdd.Click      
  Dispose()
  frmAddCustomer.ShowDialog()
End Sub

推荐答案

我看到Dispose()方法出现在frmAddCustomer.ShowDialog()的前面.这意味着，在运行frmAddCustomer.ShowDialog()之前，将清除所有资源.这意味着没有控件具有初始化，这导致错误object reference not set to an instance of object.

请删除Dispose()方法

I see Dispose() method appears in front of frmAddCustomer.ShowDialog(). It means that, all Resources will be cleared before running into frmAddCustomer.ShowDialog(). It means there is no control has initialization, this cause to the error object reference not set to an instance of object.

Please remove Dispose() method

Private Sub btnNewAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnNewAdd.Click
  'Dispose()
  frmAddCustomer.ShowDialog()
End Sub

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