How does the C WINFORM program take values from the textBox1 control in the interface?

using system;

using ;

using ;

using ;

using ;

using ;

using ;

using ;

namespace test

public partial class form1 : formpublic form1()

initializecomponent();

private void button1_click(object sender, eventargs e)

string ha = ;

ha="+ha);

I tried it though.

string ha = ;

It can also be assigned normally.

The core (and need to be added) are the following two lines:

string ha = ;

ha="+ha);

Don't use string

That's what defines an array of strings.

direct string ha=;

Strange, you write like this and compile without error?

To check. There is no initialization instance for textbox1.

Is there a namespace that references textbox?

A and B forms, first of all, it is not known who opens who or peers between A and B, and no one opens whom.

In the first case, click Show out B from A! Then pass a in the constructor of b during the show, declare a global a in b, pass the constructor of b into a to assign this global variable, when setting string in b, use the global variable to set the same value of the textbox control of a, if you can't find the textbox, then please set the accessible property of the textbox to public.

The same is true if B opens A.

The second case is that both A and B are opened by the parent form. In this case, there are also two global A and B in the parent form! Then when you open A and B, you can pass A to B, and B to A, and then there must be a global B and A in A and B!

This allows you to assign a value. Remember to judge whether it is empty or not. ·

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