Access a TextBox from another class in workspace

问题

I want to use a textBox, which is on my main form Form1 from other class. In class Form1 I can use:

    this.Invoke(new EventHandler(displayText));

and then

    private void displayAccFields(object o, EventArgs e)
    {
        tbAccRoll.AppendText(packParameters.getPackage(3) + "");
    }

and it works fine.

How can I access this textbox for displaying something from a different class?

回答1:

For sending values between two forms, you may

1. Send the values in the constructor of the second form. You may create a paramterized constructor and send the values when you initialize the form.
2. You may take a reference in to your first form in the second form.

In second form,

public Form1 objForm1;

and in First Form,

Form2 objForm2=new Form2();
Form2.objForm1=this;

and then you can use Form2's objForm1 to refer to Form1's textbox.

来源：https://stackoverflow.com/questions/15766636/access-a-textbox-from-another-class-in-workspace