关于form transfer value的问题（vb.net)

counterking

Global.vb
Dim customer_form as new frm_customer
Dim search_form as new frm_search

为什么我在 search_form那里click button1

customer_form.txt_name.text = me.txt_keyword.text

customer_form.txt_name.text 并没有显示那个数据出来的？

p/s: customer_form & search_form 都同时open着

eddom

Global.vb
Dim customer_form as frm_customer
Dim search_form as frm_search

frm_customer.vb
private sub frm_customer_load(.....)
customer_form = me
end sub

frm_search.vb
private sub frm_search_load(.....)
search_form = me
end sub

private sub button1_click(....)
customer_form.txt_name.text = me.txt_keyword.text
end sub

counterking

行了。。。谢谢你的帮助！！

但想请问下为何加了 customer_form = me 后就可以了？

什么情况下这是需要的呢？ me 的作用是，存在价值是。。？

counterking

Global.vb
Dim customer_form as new frm_customer
Dim search_form as new frm_search


frm_customer.vb
private sub button1_click(....)
search_form.show()
end sub

为什么我close了search form后再开过时，出现以下的error msg

AN unhandled exception of type 'system.NullReferenceException' occurred in demo.exe

Additional information: Object reference not set to an instance of an object

eddom

Try This

Global.vb
Dim customer_form as new frm_customer
Dim search_form as new frm_search


frm_customer.vb
private sub button1_click(....)
if search_form is nothing then search_form = new frm_search
search_form.show()
end sub

frm_search.vb
private sub frm_search_closing(.......)
search_from = nothing
end sub